Rotor position sensor switches currents in brushless dc motors
1965-01-01
Reluctance switch incorporated in an induction motor is used for sensing rotor position and switching armature circuits in a brushless dc motor. This device drives the solar array system of an unmanned space satellite.
Mathematical modeling of electromechanical processes in a brushless DC motor
Directory of Open Access Journals (Sweden)
V.I. Tkachuk
2014-03-01
Full Text Available On the basis of initial assumptions, a mathematical model that describes electromechanical processes in a brushless DC electric motor with a salient-pole stator and permanent-magnet excitation is created.
Universal Brushless-DC Motor Controller for Space Applications Project
National Aeronautics and Space Administration — The goal of this SBIR is to adapt an initial prototype ultra-miniature high-performance brushless-DC-motor controller, code named 'Puck', for use by NASA across a...
Summary on Sensorless permanent magnet Brushless DC Motor Control Strategies
Directory of Open Access Journals (Sweden)
Li Hai Xia
2016-01-01
Full Text Available This paper aims at discussing the development process and application of permanent magnet brushless DC motor. By referring to the related literatures, this thesis gives an overview of several common non-position sensor detection technologies, analyzing their strengths and weaknesses as well as a number of new and improved methods in practical applications. Besides, The application situation of the electric door with sensorless permanent magnet brushless DC motor was illustrated.
Simulation of Brushless DC Motor using Direct Torque Control
Directory of Open Access Journals (Sweden)
Mrs.G. Kusuma
2014-04-01
Full Text Available This paper deals with modelling of three phases brushless dc motor with MATLAB/SIMULINK software BLDC motor have advantages according to brushless dc motor and induction motor’s. They have improve speed torque charactistics, high efficiency high transient response and small size. It approaches for reducing the torque ripples of BLDC motor using DTC, by using control technique’s ,but present work mainly concentrate on advanced method. The whole drive system is simulated based on the system devices, BLDC motor source inverter, space vector modulation.
Steering Control of Wheeled Armored Vehicle with Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
无
2005-01-01
Considering the steering characters of one type of wheeled armored vehicle, a brushless direct current (DC) motor is adapted as the actuator for steering control. After investigating the known algorithms, one kind of algorithm, which combines the fuzzy logic control with the self-adapting PID control and the startup and pre-brake control, is put forward. Then a test-bed is constructed, and an experiment is conducted. The result of experiment confirms the validity of this algorithm in steering control of wheeled armored vehicle with brushless DC motor.
Improved Rotor Speed Brushless DC Motor Using Fuzzy Controller
Directory of Open Access Journals (Sweden)
Jafar Mostafapour
2015-04-01
Full Text Available A brushless DC (BLDC Motors have advantages over brushed, Direct current (DC Motors and , Induction motor (IM. They have better speed verses torque characteristics, high dynamic response, high efficiency, long operating life, noiseless operation, higher speed ranges, and rugged construction. Also, torque delivered to motor size is higher, making it useful in application where space and weight are critical factors. With these advantages BLDC motors find wide spread application in automotive appliance, aerospace medical, and instrumentation and automation industries This paper can be seen as fuzzy controllers compared to PI control BLDC motor rotor speed has improved significantly and beter result can be achieve.
Hybrid Adaptive Observer for a Brushless DC Motor
DEFF Research Database (Denmark)
Niemczyk, Piotr; Porchez, Thomas; Bendtsen, Jan Dimon;
2008-01-01
A novel hybrid adaptive observer for Brushless DC Motors (BLDCM) is presented. It uses two current measurements of BLDCM phases to estimate the angle and the speed of the rotor. The observer is designed on the basis of a hybrid model, which is also presented in this paper. The parameters of the o...
Digital Signal Controller Based Digital Control of Brushless DC Motor
Directory of Open Access Journals (Sweden)
Anjana Elizabeth Thomas
2013-07-01
Full Text Available This paper presents the digital control of a brushless dc (BLDC motor using TMS320F2812 DSP controller and an EPROM. The real-time control of electrical motors is an application area that is not usually the domain of Digital Signal Processors. The TMS320F2812 has got dedicated modules for digital motor control. Control algorithms used for the control has been in TMS320F2812 DSP controller. The output of the driver is 6 independent PWM pulses that have to be given to the corresponding gates of the six MOSFETs power switches used in the three-phase bridge driving circuit whose output is given to the stator of the Brushless DC Motor. The commutation technique used in this work is the trapezoidal commutation owing to its excellent speed and current control and it has been implemented using an EPROM
Brushless DC Motor Control System Design Based on DSP2812
Directory of Open Access Journals (Sweden)
Wei Min
2016-01-01
Full Text Available By comparison various control methods currently for permanent magnet brushless DC motor, on the basis of motor principle analysis, a current smallest and most real-time all-digital rare earth permanent magnet brushless DC motor control system is designed. The high-speed digital signal processor DSP2812 is applied as the main control unit. The fuzzy PID control algorithm is used to control rectifier regulator and speed, which the speed and current is double closed loop in the system. The principle of control system, control strategy and software is analyzed in this paper. The system has some features such as less overshoot, rapid response speed, good performance of anti-jamming, simple structure, high control precision, flexible in changing control policies and so on. Validity of the design is verified by prototype test.
Brushless DC motor Drive during Speed regulation with Current Controller
Directory of Open Access Journals (Sweden)
Bhikshalu Manchala
2015-04-01
Full Text Available Brushless DC Motor (BLDC is one of the best electrical drives that have increasing popularity, due to their high efficiency, reliability, good dynamic response and very low maintenance. Due to the increasing demand for compact & reliable motors and the evolution of low cost power semiconductor switches and permanent magnet (PM materials, brushless DC motors become popular in every application from home appliances to aerospace industry. The conventional techniques for controlling the stator phase current in a brushless DC drive are practically effective in low speed and cannot reduce the commutation torque ripple in high speed range. This paper presents the PI controller for speed control of BLDC motor. The output of the PI controllers is summed and is given as the input to the current controller. The BLDC motor is fed from the inverter where the rotor position and current controller is the input. The complete model of the proposed drive system is developed and simulated using MATLAB/Simulink software. The operation principle of using component is analysed and the simulation results are presented in this to verify the theoretical analysis.
The analysis and design of brushless D.C. motors
Benarous, Maamar
In modern computer systems electrical drives are used to rotate hard discs. These motors require special torque- speed characteristics. The speed of the hard disc must be constant in order for the unit to function correctly. One type of drive, which is used for hard discs is the brushless-DC-motor. This machine has permanent magnet excitation and a polyphase armature winding. It therefore takes the form of a synchronous machine, and in order to be brushless the armature winding is stationary and the excitation rotates. To run at adjustable speed a variable frequency supply is required. In the brushless D.C form the inverter output is phase locked to the rotor position, it is therefore electro-magnetically similar to the D.C machine where fixed brushes determine the frequency and phase of the current in the armature winding. In order to perform the phase lock action signals measuring the rotor position are needed. In one form of machine Hall effect probes detect the position of the rotor poles, in a second given that the rotor is in motion the induced back emf is used. Experimentally it is convenient to replace these magnet systems with a photo- transistor and rotating shutter system and this was the approach used in this thesis. The objective of this research is to investigate different aspects of this motor. The generation, measurement, and placement of signals is described and illustrated, and the design and construction of an inverter supply circuit is described. Both 2D and 3D finite element analysis is used in order to find the machine parameters as well as cogging torque analysis, using the concept of permanent magnet magnetisation characteristics. It is shown that the cogging can be reduced for certain types of magnetisation. The finite element analysis is taken further by connecting the drive circuit needed to run the machine into the finite element mesh, the machine parameters are defined using this method. The close agreement between the simulation and
The Model of Brushless Dc Motor Drive
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Aurelijus Pitrėnas
2013-05-01
Full Text Available The research considered the operation, control, mathematical and simulation models of BLDC motor. A simplified idealized simulation model was designed and tested using Matlab Simulink software package. The simulation model uses Hall effect sensor signals for determining the rotor position. Simulation was done for Maxon, EC-4 pole 22 BL A series motor. The obtained model testing results deviate from the data supplied by the motor manufacturer by as little as 0.2–10.6%; consequently, the implemented model is suitable for BLDC motor control study and research.Article in Lithuanian
James Webb Space Telescope Deployment Brushless DC Motor Characteristics Analysis
Tran, Ahn N.
2016-01-01
A DC motor's performance is usually characterized by a series of tests, which are conducted by pass/fail criteria. In most cases, these tests are adequate to address the performance characteristics under environmental and loading effects with some uncertainties and decent power/torque margins. However, if the motor performance requirement is very stringent, a better understanding of the motor characteristics is required. The purpose of this paper is to establish a standard way to extract the torque components of the brushless motor and gear box characteristics of a high gear ratio geared motor from the composite geared motor testing and motor parameter measurement. These torque components include motor magnetic detent torque, Coulomb torque, viscous torque, windage torque, and gear tooth sliding torque. The Aerospace Corp bearing torque model and MPB torque models are used to predict the Coulomb torque of the motor rotor bearings and to model the viscous components. Gear tooth sliding friction torque is derived from the dynamo geared motor test data. With these torque data, the geared motor mechanical efficiency can be estimated and provide the overall performance of the geared motor versus several motor operating parameters such as speed, temperature, applied current, and transmitted power.
Disc rotors with permanent magnets for brushless DC motor
Hawsey, Robert A.; Bailey, J. Milton
1992-01-01
A brushless dc permanent magnet motor drives an autonomous underwater vehe. In one embodiment, the motor comprises four substantially flat stators in stacked relationship, with pairs of the stators axially spaced, each of the stators comprising a tape-wound stator coil, and first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and a drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore in which the first shaft is disposed. Two different sets of bearings support the first and second shafts. In another embodiment, the motor comprises two ironless stators and pairs of rotors mounted on opposite sides of the stators and driven by counterrotating shafts.
Influence of PWM Modes on Commutation Torque Ripples in Sensorless Brushless DC Motor Control System
Institute of Scientific and Technical Information of China (English)
ZHANGXiang－jun; CHENBo－shi; 等
2001-01-01
This paper introduces four PWM modes used in the sensorless brushless DC motor control system,analyzes their different influences on the commutation torque ripple in detail,and selects the best PWM mode in four given types to reduce commutation torque ripple of Brushless OC( BLDC) motors,Simulation and experimental results show that the selection is correct and practical.
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BRUSHLESS DC MOTOR BASED ON A COMMON DC SIGNAL
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J.Karthikeyan
2010-06-01
Full Text Available The objective of this project is to build a simple current controlled modulation technique for brushless dc motors. In electric traction and most other applications, a wide range of speed and torque control of the electric motor is required. The dc machine fulfills these requirements, but the dc machine requires constant maintenance. But the brushless permanent magnet motors do not have brushes and so they require less maintenance only. Brushless dc motors are widely used in applications which require wide range of speed and torque control because of its low inertia, fast response, high reliability and maintenance free. This current controlled technique is based on the generation of quasi- square wave currents using only one controller for the three phases. The current control strategy uses a triangular carrier for the power transistors which is simpler and more accuratethan any other options. The advantages of this technique are: a The stator currents are completely characterized by their maximum amplitude , b The three phases are controlled with the same dc component , and then the phase currents are kept at exactly the same magnitude I max, c The dc link current measurement is not required .d phase currents are kept balanced and phase over currents are eliminated.
Dynamic modeling of brushless dc motors for aerospace actuation
Demerdash, N. A.; Nehl, T. W.
1980-11-01
A discrete time model for simulation of the dynamics of samarium cobalt-type permanent magnet brushless dc machines is presented. The simulation model includes modeling of the interaction between these machines and their attached power conditioners. These are transistorized conditioner units. This model is part of an overall discrete-time analysis of the dynamic performance of electromechanical actuators, which was conducted as part of prototype development of such actuators studied and built for NASA-Johnson Space Center as a prospective alternative to hydraulic actuators presently used in shuttle orbiter applications. The resulting numerical simulations of the various machine and power conditioner current and voltage waveforms gave excellent correlation to the actual waveforms collected from actual hardware experimental testing. These results, numerical and experimental, are presented here for machine motoring, regeneration and dynamic braking modes. Application of the resulting model to the determination of machine current and torque profiles during closed-loop actuator operation were also analyzed and the results are given here. These results are given in light of an overall view of the actuator system components. The applicability of this method of analysis to design optimization and trouble-shooting in such prototype development is also discussed in light of the results at hand.
Sensorless Control of PM Synchronous Motors and Brushless DC Motors
DEFF Research Database (Denmark)
Montesinos, D.; Galceran, Samuel; Blaabjerg, Frede;
2005-01-01
This paper provides a review of the literature addressing sensorless operation methods of PM brushless machines. The methods explained are state-of-the-art of open and closed loop control strategies. The closed loop review includes those methods based on voltage and current measurements, those me...
A Hybrid Model of a Brushless DC Motor
DEFF Research Database (Denmark)
Bendtsen, Jan Dimon; Hansen, Hans Brink; Kallesøe, Carsten Skovmose
2007-01-01
This paper presents a novel approach to modeling of a Brush-Less Direct Current Motor (BLDCM) driven by an inverter using hybrid systems theory. Hybrid systems combine continuous and discrete (event-based) dynamics, which is exactly the case in an inverter-driven BLDCM. The model presented in this...... work consists of a general automaton with discrete states, combined with a set of continuous dynamic equations describing the electro-mechanical behavior of the motor. One of the significant benefits of this strategy is that the model describes the motor under all possible operating conditions. The...
Analysis of torque-current characteristic of brushless DC motor driven by three-phase H-bridge
Institute of Scientific and Technical Information of China (English)
无
2000-01-01
Presents the simulation and analysis of the steady state characteristic of a brushless DC motor studies the torque-current characteristic of the motor as well and discusses the design of a current-measure circuit for torque controlling.
Improved Analytical Model of a Permanent-Magnet Brushless DC Motor
Kumar, P.; Bauer, P.
2008-01-01
In this paper, we develop a comprehensive model of a permanent-magnet brushless DC (BLDC) motor. An analytical model for determining instantaneous air-gap field density is developed. This instantaneous field distribution can be further used to determine the cogging torque, induced back electromotive
Novel Motion Sensorless Control of Single Phase Brushless D.C. PM Motor Drive, with experiments
DEFF Research Database (Denmark)
Lepure, Liviu Ioan; Boldea, Ion; Andreescu, Gheorghe Daniel;
2010-01-01
A motion sensorless control for single phase permanent magnet brushless d.c. (PM-BLDC) motor drives, based on flux integration and prior knowledge of the PM flux/position characteristic is proposed here and an adequate correction algorithm is adopted, in order to increase the robustness to noise...
The design and analysis of a novel brushless dc linear motor
Basak, A.; Filho, A. F. Flores
1994-05-01
A novel brushless dc linear motor was designed, with two armature cores and seven high energy product magnets. It was then built and tested. Both the design and the analysis were carried out assuming a linear magnetic circuit. The design procedure and the test results are presented and discussed in this paper. The new motor can also be used as a slotless linear stepping motor.
Directory of Open Access Journals (Sweden)
Uma Devi Kumaravelu
2012-01-01
Full Text Available A method of simulation and modeling outer rotor permanent magnet brushless DC (ORPMBLDC motor under dynamic conditions using finite element method by FEMM 4.2 software package is presented. In the proposed simulation, the torque developed at various positions of the rotor, under a complete cycle of excitation of the stator, is analysed. A novel method of sinusoidal excitation is proposed to enhance the overall torque development of ORPMBLDC motor.
Energy Technology Data Exchange (ETDEWEB)
Biwersi, Stephan; Tavernier, Stephan; Equoy, Samuel [Moving Magnet Technologies (MMT), Besancon (France)
2012-12-01
Moving Magnet Technologies (MMT) from Besancon in France has developed a highly efficient brushless DC motor that is especially suitable for use in electrically supported compressors. It helps to further minimise so-called turbo lag in supercharged internal combustion engines. The following report presents technical details of the electric motor and practical results in combination with an electrically driven compressor. MMT was supported by Swissauto in designing the supercharging system.
Numerical and Experimental Investigation of Heat Flow in Permanent Magnet Brushless DC Hub Motor
DEFF Research Database (Denmark)
Fasil, Muhammed; Plesner, Daniel; Walther, Jens Honore;
2014-01-01
This paper investigates the heat dissipation in the hub motor of an electric two-wheeler using lumped parameter (LP), finite element (FE) and computational fluid dynamic (CFD) models. The motor uses external rotor permanent magnet brushless DC topology and nearly all of its losses are generated...... the internal and the external flow as well as the convective heat transfer of the hub motor. Finally, an optimization study of the hub motor has been carried out using the CFD model to improve heat transfer from the stator....
High temperature brushless DC motor system and its operation mode control
Institute of Scientific and Technical Information of China (English)
邹继斌; 胡建辉; 徐永向
2001-01-01
The high temperature ( 175 ℃ ) operation of a motor spells out special requirements for control algorithms, materials and elements. The stability of motor characteristic is guaranteed by the digital control strategy. Constant velocity operation is achieved by phase-locked loop ( PLL), and constant power operation is achieved by a current-restricting circuit. A motor for constant speed and constant power operation has been built and the speed control system is tuned by MATLAB simulation. Experimental and simulation results for operation mode control of brushless DC motor are presented.
Speed Control Analysis of Brushless DC Motor Based on Maximum Amplitude DC Current Feedback
Directory of Open Access Journals (Sweden)
Hassan M.A.A.
2014-07-01
Full Text Available This paper describes an approach to develop accurate and simple current controlled modulation technique for brushless DC (BLDC motor drive. The approach is applied to control phase current based on generation of quasi-square wave current by using only one current controller for the three phases. Unlike the vector control method which is complicated to be implemented, this simple current modulation technique presents advantages such as phase currents are kept in balance and the current is controlled through only one dc signal which represent maximum amplitude value of trapezoidal current (Imax. This technique is performed with Proportional Integral (PI control algorithm and triangular carrier comparison method to generate Pulse Width Modulation (PWM signal. In addition, the PI speed controller is incorporated with the current controller to perform desirable speed operation of non-overshoot response. The performance and functionality of the BLDC motor driver are verified via simulation by using MATLAB/SIMULINK. The simulation results show the developed control system performs desirable speed operation of non-overshoot and good current waveforms.
POSITION CONTROL OF BRUSHLESS DC MOTOR BASED ON DIGITAL SIGNAL PROCESSING
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Çetin GENÇER
2006-01-01
Full Text Available Brushless DC Motors (BLDC have been used widely high performance control systems which are depended on to development of power electronic and control technology. In these motors to fed commutated supply, the control of position without oscilation has been required. In this study, position control of BLDC with digital signal processing has been implemented by a proportional-derivative (PD controller because of its simple structure. It has been seen that the controller which is proposed from simulation and experimental studies, has a quick dynamic responce with nonoscillation.
Novel Position and Speed Estimator for PM Single Phase Brushless D.C. Motor Drives
DEFF Research Database (Denmark)
Lepure, Liviu I.; Andreescu, Gheorghe-Daniel; Iles, Doris;
2010-01-01
the sensitivity to accuracy of flux linkage estimation. A speed and current close loop control is employed based on the Hall signal and the motor is controlled at different speeds in order to validate the proposed estimation algorithm with satisfying results. The position correction effect is analyzed......A novel position and speed estimator for single phase permanent magnet brushless d.c. (PMBLDC) motor drives, based on flux integration and prior knowledge of ΨPM (θ) is proposed here and an adequate correction algorithm is adopted in order to increase the robustness to noise and to reduce...... by examination of improvements in both position error and speed pulsations....
Permanent magnet brushless DC motor drives and controls
Xia, Chang-liang
2012-01-01
An advanced introduction to the simulation and hardware implementation of BLDC motor drives A thorough reference on the simulation and hardware implementation of BLDC motor drives, this book covers recent advances in the control of BLDC motor drives, including intelligent control, sensorless control, torque ripple reduction and hardware implementation. With the guidance of the expert author team, readers will understand the principle, modelling, design and control of BLDC motor drives. The advanced control methods and new achievements of BLDC motor drives, of interest to more a
Brushless DC Motor and Resolver for Venusian Environment Project
National Aeronautics and Space Administration — In response to the need for motors, actuators and sample acquisition system that can operate in the harsh Venusian environment for extended periods of time, on the...
Brushless DC Motor and Resolver for Venusian Environment Project
National Aeronautics and Space Administration — In response to the need for motors and actuators that can operate in the harsh venusian environment for extended periods of time, on the order of several hours to...
无刷直流电动机的DSP控制%DSP Control of Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
王越; 甄长飞
2012-01-01
According to the characteristics of the brushless dc motor, and the demand in practical application, design solved the rapid control problem of brushless dc motor. Using the TMS320LF2407A of the TI company as control core, and PWM and PI, we designed control circuit and control procedures for brushless dc motor in order to achieve the actual effect.%为解决无刷直流电动机的快速控制问题，提出了无刷直流电动机的DSP控制方法。采用TI公司的TMS320LF2407A芯片为控制核心，结合PWM和PI调节设计无刷直流电动机的控制电路以及控制程序，以达到节能和使电动机快速启动的效果。
Study of direct back EMF detection for sensorless brushless DC motor
Institute of Scientific and Technical Information of China (English)
ZOU Ji-bin; JIANG Shan-lin; LIANG Wei-yan
2010-01-01
In this paper,a new rotor position detecting method for the sensorless control of brushless DC motor(BLDCM)is introduced.It obtains the phase back EMF signal from the motor terminal voltage by properly choosing the PWM and sensing strategy directly and needn' t the motor neutral point voltage information.The paper analyzes both the steady-state of PWM on the high side modulator mode which doesnt consider the parasitic capacitance Coes in the switches and the transient-state of PWM on the high side modulator mode which considers the parasitic capacitance Coes in the switches in detail.The experimental results verify that the proposed method is not sensitive to switching noise,no filtering is required,and good motor performance is achieved within a wide speed range.
Directory of Open Access Journals (Sweden)
Diao Xiaoyan
2016-01-01
Full Text Available To solve the deficiencies of long optimization time and poor precision existing in conventional bacterial foraging algorithm (BFA in the process of parameter optimization, an improved bacterial foraging algorithm (IBFA is proposed and applied to speed and displacement control system of bearingless brushless DC (Bearingless BLDC motors. To begin with the fundamental principle of BFA, the proposed method is introduced and the individual intelligence is efficiently used in the process of parameter optimization, and then the working principle of bearingless BLDC motors is expounded. Finally, modeling and simulation of the speed and displacement control system of bearingless BLDC motors based on the IBFA are carried out by taking the software of MATLAB/Simulink as a platform. Simulation results show that, speed overshoot, torque ripple and rotor position oscillation are dramatically reduced, thus the proposed method has good application prospects in the field of bearingless motors.
Developing micro DC-brushless motor driver and position control for fiber positioners
Jenni, Laurent; Hörler, Philipp; Makarem, Laleh; Kneib, Jean-Paul; Gillet, Denis; Bleuler, Hannes; Bouri, Mohamed; Prada, Francisco; De Rivera, Guillermo; Sanchez, Justo
2014-07-01
In the large-scale, Dark Energy Spectroscopic Instrument (DESI), thousands of fiber positioners will be used. Those are robotic positioners, with two axis, and having the size of a pen. They are tightly packed on the focal plane of the telescope. Dedicated micro-robots have been developed and they use 4mm brushless DC motors. To simplify the implementation and reduce the space occupancy, each actuator will integrate its own electronic control board. This board will be used to communicate with the central trajectory generator, manage low level control tasks and motor current feeding. In this context, we present a solution for a highly compact electronic. This electronic is composed of two layers. The first is the power stage that can drive simultaneously two brushless motors. The second one consists of a fast microcontroller and deals with different control tasks: communication, acquisition of the hall sensor signals, commutation of the motors phases, and performing position and current regulation. A set of diagnostic functions are also implemented to detect failure in the motors or the sensors, and to sense abnormal load change that may be the result of two robots colliding.
Optimization of PID Controller for Brushless DC Motor by using Bio-inspired Algorithms
Directory of Open Access Journals (Sweden)
Sanjay Kr. Singh
2014-02-01
Full Text Available This study presents the use and comparison of various bio-inspired algorithms for optimizing the response of a PID controller for a Brushless DC Motor in contrast to the conventional methods of tuning. For the optimization of the PID controllers Genetic Algorithm, Multi-objective Genetic Algorithm and Simulated Annealing have been used. PID controller tuning with soft-computing algorithms comprises of obtaining the best possible outcome for the three PID parameters for improving the steady state characteristics and performance indices like overshoot percentage, rise time and settling time. For the calculation and simulation of the results the Brushless DC Motor model, Maxon EC 45 flat ф 45 mm with Hall Sensors Motor has been used. The results obtained the optimization using Genetic Algorithms, Multi-objective Genetic Algorithm and Simulated Annealing is compared with the ones derived from the Ziegler-Nichols method and the MATLAB SISO Tool. And it is observed that comparatively better results are obtained by optimization using Simulated Annealing offering better steady state response.
Effect of phase advance on the brushless dc motor torque speed respond
Mohd, M. S.; Karsiti, M. N.; Mohd, M. S.
2015-12-01
Brushless direct current (BLDC) motor is widely used in small and medium sized electric vehicles as it exhibit highest specific power and thermal efficiency as compared to the induction motor. Permanent magnets BLDC rotor create a constant magnetic flux, which limit the motor top speed. As the back electromotive force (EMF) voltage increases proportionally with motor rotational speed and it approaches the amplitude of the input voltage, the phase current amplitude will reach zero. By advancing the phase current, it is possible to extend the maximum speed of the BLDC motor beyond the rated top speed. This will allow smaller BLDC motor to be used in small electric vehicles (EV) and in larger applications will allow the use of BLDC motor without the use of multispeed transmission unit for high speed operation. However, increasing the speed of BLDC will affect the torque speed response. The torque output will decrease as speed increases. Adjusting the phase angle will affect the speed of the motor as each coil is energized earlier than the corresponding rise in the back emf of the coil. This paper discusses the phase advance strategy of Brushless DC motor by phase angle manipulation approaches using external hall sensors. Tests have been performed at different phase advance angles in advance and retard positions for different voltage levels applied. The objective is to create the external hall sensor system to commutate the BLDC motor, to establish the phase advance of the BLDC by varying the phase angle through external hall sensor manipulation, observe the respond of the motor while applying the phase advance by hall sensor adjustment.
Unbalanced Magnetic Force Calculation in Brushless DC Motors
Directory of Open Access Journals (Sweden)
Z. Valipoor
2015-03-01
Full Text Available In this paper, an analytical method to calculate the unbalance magnetic pull forces (UMP due to the eccentricity of the rotor with considering the slots impact, is presented. Unbalanced magnetic pull is important because it affects the wear on the bearings as well as noise and vibration. The results of the analytical method, using finite element analysis for a prototype motor, were valid. Some force harmonics have the potential to produce noise and vibration. In order to detect harmonics of unbalance magnet forces, Depending on the fault frequency, the stator currents and spectrum of the vibrations have been analyzed
Magnetic Circuit & Torque Analysis Of Brushless DC Motor
Directory of Open Access Journals (Sweden)
Arif J. Abbas
2013-05-01
Full Text Available This work is concerned with magnetic and torque analysis of BLDCM and with development of a method of designing BLDCM that have symmetric winding on the rotor .make significant contribution to the rotor inductance position difficult. It is also show that the prediction detent torque can be extremely sensitive to the permanent magnet by altering magnet arc width. Finally, simple lumped models that allow one to predict motor performance and characteristics as a function of main dimension, magnet residual flux density and phase current are developed. These models are used as a basis for an approach to designing BLDCM
Characterization and enhancement of micro brushless DC motor response
Conroy, Joseph; Kehlenbeck, Andrew; Humbert, J. Sean; Nothwang, William
2014-06-01
Commercially available speed controllers, motors, and propellers typically comprise the powertrains of many micro aerial robotic systems, such as quadrotor vehicles. As on board state sensing and processing improves, actuation bandwidth is becoming a significant bottleneck that limits the performance of the entire closed loop system. The performance of the commercial products can be greatly enhanced through the implementation of classical control methods directly at the powertrain level. In this paper, reduced order open loop models for three representative commercially available powertrains were estimated and were compared with closed loop equivalents. Further performance improvement is realized by the addition of a static inverse to mitigate the steady state structured uncertainty of the system.
Developing Micro DC-Brushless Motor Driver and Position Control for Fiber Positioners
Jenni, Laurent; Makarem, Laleh; Kneib, Jean-Paul; Gillet, Denis; Bleuler, Hannes; Bouri, Mohamed; Prada, Francisco; De Rivera, Guillermo; Sanchez, Justo
2014-01-01
In the large-scale, Dark Energy Spectroscopic Instrument (DESI), thousands of fiber positioners will be used. Those are robotic positioners, with two axis, and having the size of a pen. They are tightly packed on the focal plane of the telescope. Dedicated micro-robots have been developed and they use 4mm brushless DC motors. To simplify the implementation and reduce the space occupancy, each actuator will integrate its own electronic control board. This board will be used to communicate with the central trajectory generator, manage low level control tasks and motor current feeding. In this context, we present a solution for a highly compact electronic. This electronic is composed of two layers. The first is the power stage that can drive simultaneously two brushless motors. The second one consists of a fast microcontroller and deals with different control tasks: communication, acquisition of the hall sensor signals, commutation of the motors phases, and performing position and current regulation. A set of di...
Electromagnetic Flux Analysis of Permanent Magnet Brushless DC Motor Using Magnet Software
Directory of Open Access Journals (Sweden)
G.R.Puttalakshmi
2013-08-01
Full Text Available Permanent Magnet Brushless DC (PMBLDC motors is emerging as a suitable motor for a number of drive applications in industrial and consumer products. Cogging torque is one of the important drawbacks of PMBLDC motor which results in shaft vibrations and noise. The focus of this work is to minimize the electromagnetic flux and cogging torque in PMBLDC by introducing structural design modifications. The performance of the machine is analyzed by varying the magnet pole shape, magnet pole width and by using magnetic material with different remenance value. For analyzing the performance of the machine, machine is modeled using Finite Element Analysis (FEA based software package Magnet. Cogging torque and average torque are taken as performance measures to determineoptimum pole shape and pole width.
无刷直流电动机双模式控制%Dual Mode Control for Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
赵建勇; 许林荣; 徐交建
2012-01-01
在分析电机运行原理和应用要求的基础上,引用基于新型逆变器的无刷直流电动机双模式控制方法,设计出无刷直流电动机双模式控制器,基速以下采用双闭环控制方法,基速以上采用弱磁扩速控制方法.仿真和实验验证该方案可行,实现无刷直流电动机在宽速度范围内稳定工作.%Dual mode control method based on a new inverter for brushless DC motor was cited by analyzing the operation principle of brushless DC motor and application requirements. Dual mode controller for brushless DC motor was designed, which used dual closed loop control when motor was running below base speed and field-weakening control when motor was running above base speed. The simulation and experiment results show that brushless DC motor can operate in a wide speed range.
Control System of Sensorless Brushless DC Motor Based on TMS320F240
Directory of Open Access Journals (Sweden)
Li Zeng
2011-11-01
Full Text Available A brushless DC(BLDC motor with the characteristics of high speed and high power density has been more widely used in industrial area. The BLDC motor requires the position and speed sensors for control. However the position sensors are undesirable from standpoints of size, cost, maintenance and reliability. There are some different ways that can solve this problem, depending on the flux distribution. This paper describes a control system of sensorless BLDC motor. The back-EMF is adopted to detect the rotor position. The back-EMF is very small in the motor starting process, and it is difficult to obtain rotor position efficiently. A re-setting method of the rotor is proposed in the paper, and current closed loop is used for high-speed and safety in the motor starting process. A good speed and current double closed loops system is designed. The speed and current regulators are implemented by a digital signal processor(DSP. A simple algorithm is used to calculate motor speed indirectly by the software, which simplifies the system hardware structure. The hardware structure and software design of sensorless BLDC motor control system are described in details. The simulation and experimental results have shown the validity of the sensorless control system and the accuracy of the detective position signal obtained.
Institute of Scientific and Technical Information of China (English)
Zu-sheng HO; Chii-maw UANG; Ping-chieh WANG
2014-01-01
Brushless DC motor (BLDCM) sensorless driving technology is becoming increasingly established. However, op-timal phase correction still relies on complex calculations or algorithms. In finding the correct commutation point, the problem of phase lag is introduced. In this paper, we extract DC bus current information for auto-calibrating the phase shift to obtain the correct commutation point and optimize the control of BLDC sensorless driving. As we capture only DC bus current information, the original shunt resistor is used in the BLDCM driver and there is no need to add further current sensor components. Software processing using only simple arithmetic operations successfully accomplishes the phase correction. Experimental results show that the proposed method can operate accurately and stably at low or high speed, with light or heavy load, and is suitable for practical applications. This approach will not increase cost but will achieve the best performance/cost ratio and meet market expectations.
Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
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R. Saranya, S. Saravana kumar,R. Baskaran, A. Vinidha Roc, K. Sathiyasekar
2014-04-01
Full Text Available The Brushless Direct Current (BLDC motors are one of the motor types that is gaining rapid popularity. Its major appliances include refrigerators, washing machines, vacuum cleaners, freezers, etc. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. This paper proposes a new optimized technique for the Sensorless operation of permanent magnet brushless direct current (BLDC motor, which is based on back Electro Motive Force (back EMF, Zero Crossing Detection (ZCD. This proposed commutation technique of BLDC motor significantly reduces sensing circuits and cost of motor drive.
Integrated solar pump design incorporating a brushless DC motor for use in a solar heating system
Energy Technology Data Exchange (ETDEWEB)
Swan, Lukas G.; Allen, Peter L. [Department of Mechanical Engineering, Dalhousie University, 1360 Barrington Street, Halifax, Nova Scotia B3J 1Z1 (Canada)
2010-09-15
Most solar thermal hot water heating systems utilize a pump for circulation of the working fluid. An elegant approach to powering the pump is via solar energy. A ''solar pump'' employs a photovoltaic module, electric motor, and pump to collect and convert solar energy to circulate the working fluid. This article presents an experimental investigation of a new integrated solar pump design that employs the stator of a brushless DC motor and a magnetically coupled pump that has no dynamic seal. This design significantly reduces total volume and mass, and eliminates redundant components. The integrated design meets a hydraulic load of 1.7 bar and 1.4 litres per minute, equal to 4.0 watts, at a rotational speed of 500 revolutions per minute. The brushless DC motor and positive displacement pump achieve efficiencies of 62% and 52%, respectively, resulting in an electric to hydraulic efficiency of 32%. Thus, a readily available photovoltaic module rated 15 watts output is suitable to power the system. A variety of design variations were tested to determine the impact of the armature winding, pump size, pulse width modulation frequency, seal can material, etcetera. The physical and magnetic design was found to dominate efficiency. The efficiency characteristics of a photovoltaic module are such that over-sizing is wasteful. The integrated design presents a robust, efficient package for use as a solar pump. Although focus has been placed on application to a solar thermal collector system, variations of the design are suitable for a wide variety of applications such as remote location water pumping. (author)
Directory of Open Access Journals (Sweden)
Roni Permana Saputra
2012-03-01
Full Text Available This paper discusses the design of control system for brushless DC motor using microcontroller ATMega 16 that will be applied to an independent 4-wheel drive Mobile Robot LIPI version 2 (REV-11. The control system consists of two parts which are brushless DC motor control module and supervisory control module that coordinates the desired command to the motor control module. To control the REV-11 platform, supervisory control transmit the reference data of speed and direction of motor to control the speed and direction of each actuator on the platform REV-11. From the test results it is concluded that the designed control system work properly to coordinate and control the speed and direction of motion of the actuator motor REV-11 platform.
Control of a high-speed, brushless dc motor driven through a cycloconverter line
Cathey, J. J.; Reesor, D. B.; Weimer, J. A.
Feasibility and concept of designing a high-speed, permanent magnet, brushless dc motor aircraft fuel pump drive using a cycloconverter link is examined. Analytical methods are developed to model the behavior of a three-phase permanent magnetic machine when operated as a self-synchronous motor supplied from a polyphase, variable voltage, variable frequency source through a midpoint cycloconverter link under circulating current free mode of control. A hybrid combination of sinusoidal and dc steady-state analysis methods is utilized to obtain a suitable equivalent circuit of the motor. Study of the motor model is made to establish the nature of the no load MMF angle as a function of current to give a minimum value while assuring proper thyristor commutation. Then, a closed loop control system with an outer loop on speed and an inner loop on current is postulated wherein a proportional plus integral controller is placed in the forward path to assure minimum speed error. A numerical study of performance is presented for speed runup and rundown conditions.
Control motor brushless sensorless
Solchaga Pérez de Lazárraga, Gonzalo
2015-01-01
El proyecto consiste en la creación de un circuito capaz de controlar la velocidad de un motor brushless sensorless. Este tipo de motores eléctricos tienen como característica que no tienen escobillas para cambiar la polaridad del bobinado de su interior y tampoco precisan de un sensor que indique que ha realizado una vuelta. Los motores brushless que son controlados por este tipo de circuitos son específicos para aeronaves no tripuladas y requieren un diseño diferente a un motor brushless pe...
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Pritha Agrawal
2014-02-01
Full Text Available This paper presents a comparative analysis of speed control of brushless DC motor (BLDC drive fed with conventional two-level, three and five level diode clamped multilevel inverter (DC-MLI. The performance of the drive system is successfully evaluated using Fuzzy Logic (FL based speed controller. The control structure of the proposed drive system is described. The speed and torque characteristic of conventional two-level inverter is compared with the three and five-level multilevel inverter (MLI for various operating conditions. The three and five level diode clamped multilevel inverters are simulated using IGBT’s and the mathematical model of BLDC motor has been developed in MATLAB/SIMULINK environment. The simulation results show that the Fuzzy based speed controller eliminate torque ripples and provides fast speed response. The developed Fuzzy Logic model has the ability to learn instantaneously and adapt its own controller parameters based on disturbances with minimum steady state error, overshoot and rise time of the output voltage.
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SANJEEV SINGH
2010-12-01
Full Text Available Permanent magnet brushless DC motor (PMBLDCM drives are being employed in many variable speed applications due to their high efficiency, silent operation, compact size, high reliability, ease of control, and low maintenance requirements. These drives have power quality problems and poor power factor at input AC mains as they are mostly fed through diode bridge rectifier based voltage source inverters. To overcome such problems a single-phase single-switch power factor correction AC-DC converter topology based on a Cuk converter is proposed to feed voltage source inverters based PMBLDCM. It focuses on the analysis, design and performance evaluation of the proposed PFC converter topology for a 1.5 kW, 1500 rpm, 400 V PMBLDCM drive used for an air-conditioning system. The proposed PFC converter topology is modelled and its performance is simulated in Matlab-Simulink environment and results show an improved power quality and good power factor in wide speed range of the drive.
SPEED CONTROL OF BRUSHLESS DC MOTOR ON RESONANT POLE INVERTER USING FUZZY LOGIC CONTROLLER
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S. Sivakotiah
2011-10-01
Full Text Available Brushless dc motor has been widely used in drive system and servo control because of its fast response ,high density ,high efficiency ,low inertia ,high reliability ,maintenance free. It is however driven by a hard switching frequency, high switching losses, high electromagnetic interference, high acoustic noise and low efficiency. The rectifier/inverter with a simple commutation circuit to provide zero voltage turn on for the switches and soft turn off for diodes. The converter is intended for high performance, medium power applications requiring bidirectional power flow .A new soft switching inverter has been developed to overcome over voltages and over current problems existing resonant link inverter .This inverter employs a single auxiliary switches. The introduces fuzzy logic based soft switching resonant pole inverter using transformer, which can generates dc link voltages notches during chopping which an minimized the drawback of soft switching, The operation principle and control scheme of the inverter are analyzed and performance of the fuzzy controller is compared with conventional PI controller .The simulation result show that the fuzzy controller is compared with the conventional PI controller.
Optimal Control for Single-Phase Brushless DC Motor with Hall Sensor
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Dawei Meng
2013-02-01
Full Text Available This study deals with the optimization control of a single-phase brushless DC motor (BLDCM with Hall sensor. A simple modeling method with feasible parameter identification is adopted to meet characteristics of single-phase BLDCM. With the linear Hall sensor feedback, the advantages of current-mode control scheme and soft-commutation scheme are proposed to achieve maximum efficiency over the entire speed range. This thesis also develops a low-cost and high efficiency control for single-phase BLDCM. The hardware test platform has been constructed on a single-chip Field Programmable Gate Array (FPGA of Cyclone II Family of Altera to verify the performance and feasibility of the proposed optimization control strategies. When using the control scheme with Hall sensor, experimental results show that there are at least a 10% improvement for average value of dc-link current, a 10% improvement for RMS value of phase current and a 40% improvement for peak value of phase current.
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GHOLAMIAN, A. S.
2009-06-01
Full Text Available In this paper, a magnet shape optimization method for reduction of cogging torque and torque ripple in Permanent Magnet (PM brushless DC motors is presented by using the reduced basis technique coupled by finite element and design of experiments methods. The primary objective of the method is to reduce the enormous number of design variables required to define the magnet shape. The reduced basis technique is a weighted combination of several basis shapes. The aim of the method is to find the best combination using the weights for each shape as the design variables. A multi-level design process is developed to find suitable basis shapes or trial shapes at each level that can be used in the reduced basis technique. Each level is treated as a separated optimization problem until the required objective is achieved. The experimental design of Taguchi method is used to build the approximation model and to perform optimization. This method is demonstrated on the magnet shape optimization of a 6-poles/18-slots PM BLDC motor.
On the Application of Brushless DC Motor in Power Tools%浅谈无刷直流电机在电动工具中的应用
Institute of Scientific and Technical Information of China (English)
孙超英
2014-01-01
Make a general introduction to brushless DC motor application of power tools manufacturers, compare the technical difference between brushless DC motor and brush DC motor in powers tools from the structures and principles, combining with the significant advantages and disadvantages of brushless DC motor brushless compared with brush DC motor, to give advice of selection of brushless DC motor or brush DC motor in power tools motor from the cost of manufacturing and quality control.%介绍电动工具制造企业应用无刷直流电机的大致情况，从结构和原理上对比电动工具用无刷直流电机与有刷直流电机的技术性差异，结合无刷直流电机相比有刷直流电机的显著优缺点，从企业制造成本、质量控制角度提出了电动工具用电机选用无刷直流或有刷直流的建议方向。
Directory of Open Access Journals (Sweden)
A.V. Matyuschenko
2015-03-01
Full Text Available By means of JMAG-Designer 12 the author performed a comparative analysis of the calculation of the EMF, cogging torque and electromagnetic torque of brushless motor with permanent magnets in two-dimensional and three-dimensional formulation of the problem.
On Stability of Open-Loop Operation without Rotor Information for Brushless DC Motors
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Zhong Wu
2014-01-01
Full Text Available Open-loop operation mode is often used to control the Brushless DC Motors (BLDCMs without rotor position sensors when the back electromotive force (EMF is too weak due to the very low rotor velocity. The rotor position information is not necessary in this mode and the stator windings are supplied with voltages under a certain ratio of the amplitude to the frequency. However, the rotor synchronization will be destroyed once if the commutation instant is inappropriate. In order to improve the reliability of the open-loop operation mode, a dynamic equation is established to represent the synchronization error between the rotor and the stator. Thereafter, the stability of the open-loop control mode is analyzed by using Lyapunov indirect method. Theoretical analysis indicates that the open-loop control mode is asymptotically stable only when the commutation instant of the stator current lags behind the ideal one suitably. Finally, theoretical analysis is verified through the experimental results of a certain BLDCM.
Brushless direct-current motor with stationary armature and field
Studer, P. A.
1970-01-01
Electronically commutated dc motor has an active fixed field winding, and active fixed armature winding, and passive rotor. By use of brushless dc motor switching technique, motor provides continuous controllable and reversible torque without use of sliding contacts.
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A. Santhi Mary Antony
2015-06-01
Full Text Available Current fed Quasi Z-Source Inverters (qZSI have the advantages of voltage buck-boost capability, improved reliability, reduced passive component ratings, continuous input current, a common dc rail between source and inverter and unique regeneration capability. This current-fed qZSIs are bidirectional with an additional diode, unlike the voltage-fed ZSI that needs a switch to achieve bidirectional power flow. Since current fed quasi Z Source Inverter has many advantages it can be employed for motor drive applications such as Brushless DC motor (BLDC drive. Therefore this study proposes the use of qZSI for BLDC motor. The simulation results for the same are presented in this study.
An enhanced Z-source inverter topology-based permanent magnet brushless DC motor drive speed control
Geno Peter, P.; Rajaram, M.
2015-08-01
In this paper, an enhanced Z-source inverter (ZSI) is introduced for controlling the speed of permanent magnet brushless DC motor (PMBLDCM) drive. It is the extension of the conventional ZSI and the elements used in the circuit are the same as those of the conventional ZSI, except that the position of Inverter Bridge and diode would be exchanged from the classical circuit diagram. This exchanged circuit avoids the startup path of the inrush current and hence reduces the inrush current and improves the motor efficiency. Different modes of enhanced ZSI are studied with PMBLDCM. The voltage polarity of Z-source capacitors in the proposed circuit is the same as that of the input voltage polarity. Furthermore, to get the same voltage boost, the capacitor voltage stress is reduced to a significant extent. The speed control capability of the proposed brushless DC motor drive is compared with that of the conventional ZSI. The proposed ZSI is implemented in MATLAB/Simulink working platform and the output performance is evaluated. Also, the performance of voltage ratio is analysed both by simulation and mathematical models. All these analyses are known to express the innovative features of the proposed system.
简介永磁无刷直流电机的原理及特点%Brief in Principle and Feature of Permanent Magnetic Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
刘志刚
2014-01-01
介绍无刷直流电机在电动工具中的运用概况，对无刷电机相比有刷电机的特点、结构和控制原理进行分析，展望对电动工具应用新型电机的未来趋势。%Introduce the brushless DC motor used in power tools, analyze the characteristics, structures and control principles of brushless motor compared with brush motor, looking forward to the future trend of the new motor for power tools applications.
Aspects Concerning the Torque Ripple Control of the Brushless DC Motor
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BALUTA, G.
2013-05-01
Full Text Available This paper deals with two advanced numerical structures to control the electromagnetic torque ripple of Brushless Direct Current Motors (BLDCM, indirectly achieved by phase currents control and directly by the Direct Torque Control (DTC technique. In DTC there was implemented an observer to increase the rudimentary transducer resolution, containing three Hall Effect sensors. The experimental results describe the evolution of torque in both situations of control and are obtained by applying a control strategy for an electric drive system with BLDCM with trapezoidal Back-EMF in Two-Phase Mode.
Energy Technology Data Exchange (ETDEWEB)
Luo, Shaohua, E-mail: hua66com@163.com [The Jiangsu Key Laboratory of Advanced Manufacturing Technology, Huaiyin Institute of Technology, Huai’an 223003 (China); School of Automation, Chongqing University, Chongqing 400044 (China); Hou, Zhiwei; Chen, Zhong [The Jiangsu Key Laboratory of Advanced Manufacturing Technology, Huaiyin Institute of Technology, Huai’an 223003 (China)
2015-12-15
In this paper, chaos control is proposed for the output- constrained system with uncertain control gain and time delay and is applied to the brushless DC motor. Using the dynamic surface technology, the controller overcomes the repetitive differentiation of backstepping and boundedness hypothesis of pre-determined control gain by incorporating radial basis function neural network and adaptive technology. The tangent barrier Lyapunov function is employed for time-delay chaotic system to prevent constraint violation. It is proved that the proposed control approach can guarantee asymptotically stable in the sense of uniformly ultimate boundedness without constraint violation. Finally, the effectiveness of the proposed approach is demonstrated on the brushless DC motor example.
International Nuclear Information System (INIS)
In this paper, chaos control is proposed for the output- constrained system with uncertain control gain and time delay and is applied to the brushless DC motor. Using the dynamic surface technology, the controller overcomes the repetitive differentiation of backstepping and boundedness hypothesis of pre-determined control gain by incorporating radial basis function neural network and adaptive technology. The tangent barrier Lyapunov function is employed for time-delay chaotic system to prevent constraint violation. It is proved that the proposed control approach can guarantee asymptotically stable in the sense of uniformly ultimate boundedness without constraint violation. Finally, the effectiveness of the proposed approach is demonstrated on the brushless DC motor example
Position and Speed Control of Brushless DC Motors Using Sensorless Techniques and Application Trends
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Jaime Gómez-Gil
2010-07-01
Full Text Available This paper provides a technical review of position and speed sensorless methods for controlling Brushless Direct Current (BLDC motor drives, including the background analysis using sensors, limitations and advances. The performance and reliability of BLDC motor drivers have been improved because the conventional control and sensing techniques have been improved through sensorless technology. Then, in this paper sensorless advances are reviewed and recent developments in this area are introduced with their inherent advantages and drawbacks, including the analysis of practical implementation issues and applications. The study includes a deep overview of state-of-the-art back-EMF sensing methods, which includes Terminal Voltage Sensing, Third Harmonic Voltage Integration, Terminal Current Sensing, Back-EMF Integration and PWM strategies. Also, the most relevant techniques based on estimation and models are briefly analysed, such as Sliding-mode Observer, Extended Kalman Filter, Model Reference Adaptive System, Adaptive observers (Full-order and Pseudoreduced-order and Artificial Neural Networks.
structure and performance analysis of DC brushless motor%直流无刷电动机的结构与性能分析
Institute of Scientific and Technical Information of China (English)
唐小元
2013-01-01
新世纪以来精密伺服装置向朝着高端不断发展，作为动力的直流无刷电动机作为高性能、高功率密度和长寿面的特种电机越来越引起了人们的重视。通过研究总结无刷电机结构与性能的各种联系与区别，有助于无刷电机的设计和使用。%In the new century, the precision power device has great development,the brushless DC motor as a special-ty motors of high performance and high power density and longevity have attracted people's attention. By studying relations and differences of the structure and properties of brushless motor .It is helpful for brushless motor design and use.
Institute of Scientific and Technical Information of China (English)
HUANG Ping-lin; HU Qian-sheng; YU Li; HUANG Yun-kai
2006-01-01
Based on the configuration of deep slot concentrated coils,an analytical model is developed for predicting the armature reaction field produced by the 3-phase stator windings of permanent magnet brushless DC motors with concentrated coils by using the image method and the analytical functions of the armature reaction and winding inductances are proposed accounting for the influence of statot slotting.This approach is different from the method of equivalent distributed current sheet and more suitable for electric machines,which have concentrated coils and deeper slots.Under different control mode,the different analytical functions are presented.This will be helpful when further analyzing the performance of the motor.The results agree with the experiment very well.
Institute of Scientific and Technical Information of China (English)
2011-01-01
The Brushless Direct Current （BLDC） motor is widely used in aerospace area, CNC machines and servo systems that require the high control accuracy Once the faults occur in the motor, it will cause great damage to the whole system. Mechanical faults are common in electric machines, and account for up to 50%-60% of the faults. Approximately, 80% of the mechanical faults lead to the eccentricity. So it is necessary to monitor the health condition of the motor to ensure the faults can be detected earlier and measures will be taken to imorove the reliability.
Summary of Detecting Rotor Position Technique for Brushless DC Motor%无刷直流电机转子位置检测技术综述
Institute of Scientific and Technical Information of China (English)
吴红星; 叶宇骄; 倪天; 郭庆波
2011-01-01
无刷直流电机是一种先进的机电一体化装置,无刷直流电动机及控制技术由于其本身特点,使其成为驱动控制领域的研究焦点.该文根据无刷直流电机无位置传感器控制特点,分析了无刷直流电机工作原理,结合国内外基于无刷直流电机转子位置检查控制的相关文献,综述了无刷直流电机转子位置检测控制方法发展概况,并针对每种控制方法阐述了其优缺点.%The brushless DC Motor Drives is an advanced mechanical electronic devices. The technology of sensorless brushless DC motor control is becoming researching focus because of its special structure and low cost. The article presented analysis of characteristics and working principle of the brushless DC motor. It also discussed the development of detecting rotor position means for brushless DC motor based on the relevant literature home and abroad. At the same time it described the advantages and disadvantages of various methods according to each new detecting rotor position technique.
无轴承无刷直流电机的直接转矩控制%Direct torque control of bearingless brushless DC motor
Institute of Scientific and Technical Information of China (English)
许洁; 刘贤兴; 李兵伟
2012-01-01
无轴承无刷直流电机结合了无轴承电机和无刷直流电机的优点、具有良好的行特性和广泛的运用前景.研究了无轴承无刷直流电机的控制方法,并将直接转矩控制技术应用于无轴承无刷直流电机的转矩绕组.通过Matlab/Simulink仿真和实验结果表明,转矩绕组的直接转矩控制(DTC)能提高系统的响应速度,减少转矩脉动,提高系统的静动态性能且控制方法简单有效.%Bearingless brushless DC motor, combining advantages of brushless DC motor and bearingless motor, has favorable operating characteristics and wide range of applications. In this paper, the control method of bear ingless brushless DC motor is researched, and the bearingless brushless DC motor's torque winding is controlled by using the method of direct torque control ( DTC ). By Matlab/Simulink simulation and experiment of the con trol system, the results show that the application of DTC to torque winding control of bearingless brushless DC motor is correct and feasible. DTC improves the system's response speed, reduces torque ripple, and optimizes the control effect. The control method is relatively simple.
Study of Fuzzy Adaptive PID Control of Brushless DC Motor%无刷直流电机模糊自适应PID控制的研究
Institute of Scientific and Technical Information of China (English)
潘晓磊; 赵川; 吕海立
2016-01-01
为了提高无刷直流电机控制系统的动、静态性能，将模糊控制结合PID控制算法应用到无刷直流电机速度控制系统中。在分析了无刷直流电机速度控制系统的基础上，利用PSIM与MATLAB／Simulink共同建立了无刷直流电动机模糊自适应PID控制的仿真模型，充分发挥了PSIM和MATLAB／Simulink各自在仿真方面的优势，简化了建立仿真模型的过程。仿真结果表明，采用模糊PID集成控制算法能够使无刷直流电机速度控制系统具有更快的响应速度和更强的抗干扰能力，对无刷直流电机控制系统的设计具有一定的指导意义。%In order to improve the static and dynamic performance of brushless DC motor control system, fuzzy control combined with PID control algorithm is applied to the brushless DC motor speed control system, the integration of fuzzy PID control algorithm. On the analysis of the brushless dc motor speed control system, using the MATLAB/Simulink to establish brushless DC motor speed control system simulation model. Among them, the control system of brushless DC motor drive model and control algorithm were established in PSIM and MATLAB/Simulink environment, give full play to their advantages, the PSIM and MATLAB simplifies the process of establishing simulation model. The simulation results show that the integration of fuzzy PID control algorithm can make the brushless DC motor speed control system has better dynamic and static performance and strong anti-jamming capability, the design of brushless DC motor control system has a certain guiding significance.
Low-cost sensorless control of four-switch, brushless DC motor drive with direct back-EMF detection
Institute of Scientific and Technical Information of China (English)
Abolfazl HALVAEI NIASAR; Abolfazl VAHEDI; Hassan MOGHBELLI
2009-01-01
We propose a position sensorless control scheme for a four-switch, three-phase brushless DC motor drive, based on the zero crossing point detection of phase back-EMF voltages using newly defined error functions (EFs). The commutation instants are 30° after detected zero crossing points of the EFs. Developed EFs have greater magnitude rather than phase or line voltages so that the sensorless control can work at a lower speed range. Moreover, EFs have smooth transitions around zero voltage level that reduces the commutation errors. EFs are derived from the filtered terminal voltages Vao and vbo of two low-pass filters, which are used to eliminate high frequency noises for calculation of the average terminal voltages. The feasibility of the proposed sensorless control is demonstrated by simulation and experimental results.
Directory of Open Access Journals (Sweden)
Weiran Wang
2013-06-01
Full Text Available In order to improve the performance of bearingless brushless DC motor, a closed-loop suspended force controller combining the discrete space voltage vector modulation is applied and the direct torque control is presented in this paper. Firstly, we increase the number of the control vector to reduce the torque ripple. Then, the suspending equation is constructed which is spired by the direct torque control algorithm. As a result, the closed-loop suspended force controller is built. The simulated and experimental results evaluate the performance of the proposed method. The more advantage is that the proposed algorithm can achieve the fast torque response, reduce the torque ripple, and follow ideal stator flux track. Furthermore, the motor which implants the closed-loop suspended force controller cannot onlyobtain the dynamic response rapidly and displacement control accurately, but also has the characteristics of bearingless brushless DC motor (such as simple structure, high energy efficiency, small volume and low failure rate.
Development of a Practical Low-Cost µC based Brushless DC Motor Controller using Proteus
Directory of Open Access Journals (Sweden)
Y. L. Karnavas
2012-09-01
Full Text Available Simulation, design and prototype construction of a low cost three phase permanent magnet (PM brushless DC (BLDC motor controller for low power applications is studied in this paper. The drive circuitry is based on the PIC16F877A microcontroller (µC, which –among others- performs pulse width modulation (PWM control for a 6-step, 120-degree trapezoidal PM BLDC motor drive. The specific processor is a widely used one and its characteristics are judged excellent in conjunction with its low cost. The prototype controller developed can perform rotation direction control, commutation sequence, speed control and reading Hall sensor signals. The controlling technique chosen is a “sensored type” one. The main reason for that, except control simplicity is the need for both low-speed and high-speed applications. The application of Proteus Virtual System Modelling (VSM software is also introduced in the paper. This software is used as a real-time simulation tool, in order to verify the performance of the BLDC motor drive, prior to its hardware implementation. Through virtual simulation of all the components used, the relevant results can be analyzed and monitored. Verification of the experimental results and validation of the simulated circuit has been done through the comparison of the results.
Directory of Open Access Journals (Sweden)
Shaohua Luo
2015-12-01
Full Text Available In this paper, chaos control is proposed for the output- constrained system with uncertain control gain and time delay and is applied to the brushless DC motor. Using the dynamic surface technology, the controller overcomes the repetitive differentiation of backstepping and boundedness hypothesis of pre-determined control gain by incorporating radial basis function neural network and adaptive technology. The tangent barrier Lyapunov function is employed for time-delay chaotic system to prevent constraint violation. It is proved that the proposed control approach can guarantee asymptotically stable in the sense of uniformly ultimate boundedness without constraint violation. Finally, the effectiveness of the proposed approach is demonstrated on the brushless DC motor example.
PERFORMANCE EVALUATION OF HYBRID FUZZY LOGIC CONTROLLER FOR BRUSHLESS DC MOTOR DRIVE
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C. SUBBA RAMI REDDY
2011-06-01
Full Text Available This paper presents Hybrid fuzzy logic controller (HFLC for the well developed and sophisticated simulation model of Brush less DC (BLDC motor drive using MATLAB. The developed simulation model has been examined by the PID controller and HFLC. The performance of the controllers is evaluated more precisely from various simulation studies for variations in the load torque and speed of BLDC motor drive. A performance comparison of two controllers is also carried out by taking various performance measures such as settling time, steady state error, peak overshoot, the integral of the absolute value of the error (IAE and the integral of the time-weighted squared error (ITSE. The results confirm that the developed simulation model is very convenient for the precise evaluation of performance and the HFLC shows improved performance over the PID controller in terms of disturbance rejection or parameter variation.
Directory of Open Access Journals (Sweden)
Quanwu Li
2016-01-01
Full Text Available High reliability is required for the permanent magnet brushless DC motor (PM-BLDCM in an electrical pump of hypersonic vehicle. The PM-BLDCM is a short-time duty motor with high-power-density. Since thermal equilibrium is not reached for the PM-BLDCM, the temperature distribution is not uniform and there is a risk of local overheating. The winding is a main heat source and its insulation is thermally sensitive, so reducing the winding temperature rise is the key to the improvement of the reliability. In order to reduce the winding temperature rise, an electromagnetic-thermal integrated design optimization method is proposed. The method is based on electromagnetic analysis and thermal transient analysis. The requirements and constraints of electromagnetic and thermal design are considered in this method. The split ratio and the maximum flux density in stator lamination, which are highly relevant to the windings temperature rise, are optimized analytically. The analytical results are verified by finite element analysis (FEA and experiments. The maximum error between the analytical and the FEA results is 4%. The errors between the analytical and measured windings temperature rise are less than 8%. It can be proved that the method can obtain the optimal design accurately to reduce the winding temperature rise.
Brushless DC Motor Self-Adaption Fuzzy PID Control System%无刷直流电机自适应模糊PID控制系统
Institute of Scientific and Technical Information of China (English)
王国玲; 李振宇; 范自道
2013-01-01
针对无刷直流电机传统PID控制存在精度低、抗干扰能力差及模糊控制稳态精度不高等问题，研究了一种自适应模糊PID控制方法。论文分析了直流无刷电机的工作原理，建立了直流无刷电机自适应模糊PID控制系统的计算机仿真数学模型，设计了系统速度环的模糊PID控制器，仿真结果表明，与传统PID控制相比，自适应模糊PID控制的BLDCM系统具有更高的稳定性和控制精度、更快的动态响应速度。%For the lower precision,bad anti-interference capability of traditional PID control and lower stable precision of fuzzy control for brushless DC motor,an adaptive fuzzy-PID control was deeply investigated in this paper. Working theory of brushless DC motor was analyzed,the simulated mathematical model of adaptive fuzzy-PID control for brushless DC motor was established,and the fuzzy-PID controller of speed regulator was designed. The results of simulation verified the better stability,the faster dynamic speed of adaptive fuzzy-PID control for brushless DC motor compared to traditional PID control.
无刷直流电机的模糊控制系统仿真%Simulation of Fuzzy Control for Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
焦利利; 杨风
2014-01-01
This paper introduces the brushless DC motor of basic principle and mathematical model. Through the Simulink toolbox of the MATLAB model to build the fuzzy controller, the fuzzy control method of Brushless DC motor speed control., which achieves realization of Brushless DC motor fuzzy control system computer simulation. The results show that, the fuzzy controller has the advantages of simple structure, easy to implement, which can basically meet the system performance requirements.%本文介绍了无刷直流电机基本原理和数学模型。利用Matlab软件中Simulink工具箱搭建模糊控制器，采用模糊控制法对无刷直流电机进行调速。实现了无刷直流电机的模糊控制系统的计算机仿真。结果表明，该模糊控制器结构简单、易于实现，能够基本满足系统的性能要求。
Comparative analysis of some brushless motors based on catalog data
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Anton Kalapish
2005-10-01
Full Text Available Brushless motors (polyphased AC induction, synchronous and brushless DC motors have no alternatives in modern electric drives. They possess highly efficient and very wide range of speeds. The objective of this paper is to represent some relation between the basic parameters and magnitudes of electrical machines. This allows to be made a comparative analysis and a choice of motor concerning each particular case based not only on catalogue data or price for sale.
无刷直流电机的智能控制研究%Research on the Intelligent Control of the Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
文卫
2011-01-01
无刷直流电机具有交流电机结构简单,运行可靠,维护方便等优点,又具有直流电机那样良好的调速性能而无机械换向器等优势,得到广泛应用.针对大多数无刷直流电机位置伺服系统采用的是PID控制方式,此控制方式存在系统参数发生变化或带有非线性负载时,其稳态输出特性变差,难以获得满意的控制效果的情况,本文在分析无刷直流电机的模型后,提出一种能根据跟踪误差大小,利用模式切换开关自动切换到PID控制或滑模变结构控制的智能控制方法,从而实现无刷直流电机转子转速的快响应、低超调和高精度控制.%The brushless DC motor has some AC motor advantages in the simple structure, reliable operation and convenient maintenance, and also has the DC motor advantages that good performance of speed and no mechanical commutation, so it is widely used. For most of the brushless DC motor position servo system uses a PID control mode. With this control mode the steady - state output characteristics would become poor when system parameter changes or with nonlinear load, and it is difficult to obtain satisfactory control effect. After analyzed the model of brushless DC motor, this article presented an intelligent control method that can utilize mode switch automatically switch to PID control or sliding mode variable structure control according to the tracking error size, so as to realize the brushless DC motor rotor speed quick response, low overshoot and high precision control.
Study on Dual-redundancy Brushless DC Motor Control System%双余度无刷直流电机控制系统研究
Institute of Scientific and Technical Information of China (English)
李东
2012-01-01
在复杂工况条件下，由于维修不便，对无刷直流电机的可靠性要求较高。双余度无刷直流电机则能较好的解决此问题。本文设计了基于DSP的双余度无刷直流电动机驱动控制系统，详细介绍了系统DSP控制器的硬件电路设计，实现对电动机的位置、速度和电流的检测，给出了系统软件设计方案及控制策略，从而实现对整个系统的控制。结果表明，该控制系统，硬件电路结构简单，系统实时性好，响应快，具有良好的控制性能及动态特性。% Under harsh operating condition, maintenance inconvenience, so the high reliability of brushless DC motor is required. Dual-redundancy brushless DC motor is a good solution to this problem. A control system of dual-redundancy brushless DC motor (BLDCM) based on digital signal processor is studied in this paper. The hardware design solutions of the DSP control er is detailed, then the position, speed and the current of the motor are detected, the software design solutions and the control method for the whole control system are presented. Experimental results show that the dual-redundancy motor system based on one piece of DSP has simple circuit, real-time and rapid response, and the system has good control performance and dynamic characteristic.
Optimizing of Commutation Torque Ripple Strategy in Brushless DC Motor%BLDCM换相转矩脉动的优化策略
Institute of Scientific and Technical Information of China (English)
王晓锋; 林伟
2014-01-01
First of all, this article creates the mathematical model of blushless DC Motor.Secondly, analyze the reduction theory of commutation torque ripple. Finally, put forward a strategy to reduce the commutation torque ripple from the low-speed level and high-speed level.This method guarantee equal between current decline rate of shutdown phase and current rising rate of opening phase during commutation, thus keep the current of un-commutation stable.Build a real brushless DC motor control platform for experimental verification,the proposed strategy of brushless DC motor commutation torque ripple is suppressed effectively.%首先建立了无刷直流电机(Brushless direct current motor, BLDCM)的数学模型，然后分析了换相转矩脉动的抑制原理，最后提出了低速阶段和高速阶段抑制换相转矩脉动的策略。此方法保证在换相期间，关断相的电流下降率和开通相的电流上升率绝对值相等，继而保证在换相期间非换相相电流保持恒定。搭建了实际直流无刷电机控制平台并进行实验验证，所提出的策略有效地抑制了直流无刷电机换相转矩脉动。
Energy Technology Data Exchange (ETDEWEB)
MacMillan, P.N.
1985-06-01
Recent improvements in rare earth magnets have made it possible to construct strong, lightweight, high-horsepower DC motors. This has occasioned a reassessment of electromechanical actuators as alternatives to comparable pneumatic and hydraulic systems for use as flight-control actuators for tactical missiles. A dynamic equivalent circuit model for the analysis of a small four pole brushless DC motor fed by a transistorized power conditioner utilizing high speed switching power transistors as final elements is presented. The influence of electronic commutation on instantaneous dynamic motor performance is particularly demonstrated and good correlation between computer simulation and typical experimentally obtained performance data is achieved. The model is implemented in CSMP language and features more accurate air gap flux representation over previous work. Hall-effect sensor rotor position feedback is simulated. Both constant and variable-air-gap flux is modeled and the variable flux model treats the flux as a fundamental and one harmonic.
Calculation Of The Brushless DC Motor Shaft Speed With Allowances For Incorrect Alignment Of Sensors
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Kolano Krzysztof
2015-09-01
Full Text Available The paper treats of correcting calculation errors of the BLDC motor speed, based on the time elapsed between successive changes in the shaft position sensor signal. The developed method enables correction of errors of the deployment of sensors as well as rotating elements of the observation system of the motor shaft position. The correction algorithm performance was analysed with the aid of a model implemented in Matlab-Simulink environment. After confirming usefulness of the developed method through simulation, its usefulness was verified in real closed-loop feedback systems with a BLDC motor. The results of measurements carried out at the developed laboratory station are presented.
Adjustment of Phase Change Opportunity in Brushless DC Motor%直流无刷电机换相时机的调整
Institute of Scientific and Technical Information of China (English)
刘佳峰; 谢杨华
2006-01-01
直流无刷电机BLDCM(Brushless DC Motor)采用电子换相代替机械换相,兼有交流电机和直流电机的优点.提出了在磁场畸变的情况下,应将直流无刷电机换相时机从几何中性线处调整到物理中型线处.仿真结果表明:此调整方案可使电机的电磁转矩提高约10%.
无位置传感器无刷直流电机的DSP控制%DSP Control of Brushless DC Motor Without Position Sensor
Institute of Scientific and Technical Information of China (English)
王宏伟; 梁晖
2005-01-01
设计了一种无位置传感器无刷直流电机(Brushless DC Motor,简称BLDCM)的变频调速系统.该系统基于PS21255智能功率模块(IPM)和TMS320LF2407A数字信号处理器(DSP),采用反电势法实现了WPS的BLDCM控制.整个系统集成度高,控制灵活,稳定性好.实验结果表明,该系统运行性能良好.
电动自行车用无刷直流电机控制系统设计%Brushless DC Motor of Electric Bicycle Control System Design
Institute of Scientific and Technical Information of China (English)
钟晓伟; 宋蛰存; 许刚
2011-01-01
根据以无刷直流电机为驱动电机的电动自行车工作原理,设计了一种以ATmega16单片机为控制核心的电动自行车用无刷直流电机控制系统,给出了系统详细的硬件电路和软件设计方法.在MATLAB/Simulink环境下仿真得出适当的速度环与电流环调节器参数值.与传统的专用模拟控制器相比,具有更大的灵活性、可靠性,容易实现附加功能和全数字化控制.%According to brushless DC motor-driven electric motor bike working principle, a brushless DC motor of electric bicycle control system based on ATmega16 microcontroller was designed, a detail of hardware circuit and software design methods were given. In MATLAB/Simulink simulation environment to draw the appropriate speed loop and current loop regulator parameters. Compared to the traditional specific analog controller, it had greater flexibility,reliability, also was easy to implement additional features and fully digital control.
Research Status and Development Trends of Bearingless Brushless DC Motor%无轴承无刷直流电机研究现状及发展趋势
Institute of Scientific and Technical Information of China (English)
刘奕辰; 朱熀秋
2014-01-01
A bearingless brushless DC motor is a new type of high performance motor , which integrates the function of magnetic bearings into a brushless DC motor .It has the characteristic of no friction , no wear , high speed , long service life of the magnetic bearings , and also has the advantages of high efficiency , small volume, simple structure of the brushless DC motor , and it has a potential vast development and application prospects .In this paper , the motor structure of the bearingless brushless DC and the principle of suspension force generation were introduced .A comprehensive overview of the bearingless brushless DC motors was presented , with particular emphasis on the motor structure and the control strategy analysis .On the basis of the superiority and the existence problems of the bearingless brushless DC , the research development trend of the bearingless brushless DC motor was analyzed in this paper .The results provided the reference for the fur-ther study on the bearingless brushless DC motor.%无轴承无刷直流电机是一种高性能的新型电机，它将无刷直流电机和磁悬浮轴承功能集成一体，使其不仅具备磁轴承无摩擦、无磨损、高速度、寿命长等特点，还具有无刷直流电机的效率高、体积小、结构简单的优势，潜在发展和应用前景非常广阔。本文介绍无轴承无刷直流电机的结构特点、悬浮力产生的原理，从电机结构、控制策略方面分析了无轴承无刷直流电机的国内外发展现状，并根据无轴承无刷直流电机的优势及存在的问题，分析了未来无轴承无刷直流电机的研究发展趋势，为今后进一步开展无轴承无刷直流电机的研究提供参考。
Sliding mode control of reaction flywheel-based brushless DC motor with buck converter
Institute of Scientific and Technical Information of China (English)
Liu Gang; Zhang Cong
2013-01-01
Reaction flywheel is a significant actuator for satellites' attitude control.To improve out-put torque and rotational speed accuracy for reaction flywheel,this paper reviews the modeling and control approaches of DC-DC converters and presents an application of the variable structure system theory with associated sliding regimes.Firstly,the topology of reaction flywheel is constructed.The small signal linearization process for a buck converter is illustrated.Then,based on the state averaging models and reaching qualification expressed by the Lee derivative,the general results of the sliding mode control (SMC) are analyzed.The analytical equivalent control laws for reaction flywheel are deduced detailedly by selecting various sliding surfaces at electromotion,energy consumption braking,reverse connection braking stages.Finally,numerical and experimental examples are presented for illustrative purposes.The results demonstrate that favorable agreement is established between the simulations and experiments.The proposed control strategy achieves preferable rotational speed regulation,strong rejection of modest disturbances,and high-precision output torque and rotational speed tracking abilities.
Brushless DC motor control system based on expert PID%基于专家PID的直流无刷电机控制系统＊
Institute of Scientific and Technical Information of China (English)
张浩; 吴新开
2015-01-01
由于直流无刷电机存在时变性、非线性、不确定性、难以建模等特点，采用常规的PID很难达到理想的控制效果。通过专家PID控制理论并结合实践研究，提出一种高性能的速度控制方案。基于多旋翼飞行器常用的无刷电机转速控制这一实验平台，采用编码器测速实现无刷电机的闭环控制。无刷电机速度PID控制器的引入，开辟了多旋翼飞行器电机控制和姿态控制的新思路。%The brushless DC motor has the characteristics of time varing, nonliner, uncertainty and hardly modeling, so it is difficult to obtain ideal control effect by using conventional PID control. It is hoped to find a high-performance speed control scheme through the theory and practical research of expert PID. Based on the experiment platform of commonly used brushless motor speed control for multi rotor aircraft, the encoder is applied to measure the rotational speed and realize its closed-loop control. The introduction of brushless motor speed PID controller has opened up new ideas for motor control and attitude control of multi rotor aircraft.
Brushless DC motor control system based on expert PID%基于专家PID的直流无刷电机控制系统＊
Institute of Scientific and Technical Information of China (English)
张浩; 吴新开
2015-01-01
The brushless DC motor has the characteristics of time varing, nonliner, uncertainty and hardly modeling, so it is difficult to obtain ideal control effect by using conventional PID control. It is hoped to find a high-performance speed control scheme through the theory and practical research of expert PID. Based on the experiment platform of commonly used brushless motor speed control for multi rotor aircraft, the encoder is applied to measure the rotational speed and realize its closed-loop control. The introduction of brushless motor speed PID controller has opened up new ideas for motor control and attitude control of multi rotor aircraft.%由于直流无刷电机存在时变性、非线性、不确定性、难以建模等特点，采用常规的PID很难达到理想的控制效果。通过专家PID控制理论并结合实践研究，提出一种高性能的速度控制方案。基于多旋翼飞行器常用的无刷电机转速控制这一实验平台，采用编码器测速实现无刷电机的闭环控制。无刷电机速度PID控制器的引入，开辟了多旋翼飞行器电机控制和姿态控制的新思路。
The Study of Permanent Magnet Brushless DC Motor%对永磁无刷直流电机的研究
Institute of Scientific and Technical Information of China (English)
杨杰城
2016-01-01
随着我国科技不断发展，永磁无刷直流电机已成为电力电子一体化高科技产品，凭借其结构简单、运行可靠、效率高，在航天、医学、家用民用产品制作中得到广泛应用。文章对永磁无刷直流电机设计、控制以及建模方法进行分析，展现其对生产起到的重要作用。%With the continuous development of science and technology in our country,permanent magnet brushless dc motor has become power and electricity integration high-tech products.With its simple structure,reliable operation,high efficiency,it has been widely used in the aerospace,medical,household production.In this paper,the design,control,and modeling methods of permanent magnet brushless dc motor are analyzed.
Directory of Open Access Journals (Sweden)
Bangcheng Han
2013-01-01
Full Text Available We firstly report on an investigation into the unbalanced magnetic pull (UMP effect on the static stiffness models of radial active magnetic bearing (RAMB in brushless DC motor (BDCM in no-loaded and loaded conditions using the finite element method (FEM. The influences of the UMP on the force-control current, force-position, current stiffness, and position stiffness of RAMB are clarified in BDCM with 100 kW rated power. We found the position stiffness to be more susceptible to UMP. The primary source of UMP is the permanent magnets of BDCM. In addition, the performance of RAMB is affected by the UMP ripples during motor commutation and also periodically affected by the angular position of rotor. The characteristic curves of RAMB force versus control current (or rotor position and angular position of rotor affected by the UMP are given. The method is useful in design and optimization of RAMB in magnetically suspended BDCMs.
Institute of Scientific and Technical Information of China (English)
张相军; 陈伯时
2001-01-01
This paper introduces four PWM modes used in the sensorless brushless DC motor control system, analyzes their different influences on the commutation torque ripple in detail, and selects the best PWM mode in four given types to reduce commutation torque ripple of Brushless OC(BLDC) motors. Simulation and experimental results show that the selection is correct and practical.
Institute of Scientific and Technical Information of China (English)
杨闯; 王国辉
2014-01-01
结合永磁无刷直流电机设计和应用，以Φ300 mm、DC36 V打草机为例，从电池包空载放电时间、切割效率、单电池包工作时间、抗过载性及结构优化设计等五个方面分析永磁无刷直流电机与永磁有刷直流电机的区别，得出永磁无刷直流电机性能占优的结论。%Take the Φ300 mm DC36V grass trimmer for example, combined with the design and application of permanent magnet brushless DC motor, the author analyzes the difference between permanent magnet brushless DC motor and permanent magnet brush DC motor from five aspects such as battery pack discharge time, cutting efficiency, single battery pack working time, anti-overload resistance and structural optimization design, and comes to the conclusion that permanent magnet brushless DC motor superiors.
无刷直流电动机不导通相电流分析%Analysis of Floating Phase Current in Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
王璞; 解恩; 翟猛
2012-01-01
分析了无刷直流电动机在三相六状态及不同的PWM方式下,绕组续流期间不导通相电流,并且指出各有不同.对常用的各种PWM方式通过原理分析及数学推导,得出不导通相电流存在的时段和幅值趋势.并通过实验测试,验证了分析结果.%The floating phase current during the free-wheeling and the difference of the brushless DC motor operating in three-phase-six-states and different PWM modes were analysed. The conclusion of existing time and amplitude trend were achieved by theory analysis and mathematical deduction of common PWM modes. The result was verified through the experiment test.
Design and Study of Dual-Redundancy Brushless DC Motor for Actuator Servo System%舵机用双余度无刷直流电动机设计研究
Institute of Scientific and Technical Information of China (English)
高金行; 戴志勇; 全兴源; 艾于琛
2011-01-01
以舵机用双余度无刷直流电动机为研究对象,通过数学建模,对无刷直流电动机进行性能仿真,重点介绍样机被测波形及性能数据列表,分析余度换向性能的关键技术,以实现性能调试最优.%A study of dual redundant brushless DC motor for actuator servo system was given. With the mathematical model of brushless DC motor, the simulation performance was shown. The waveforms of BLDC motor were introduced. The performance data of motor was listed. The key technology of commutation was analyzed. The performance was made perfectly.
Adaptive GA-ADRC in Torque Ripple Reduction of Brushless DC Motor%自适应GA-ADRC在无刷直流电机转矩脉动抑制中的研究
Institute of Scientific and Technical Information of China (English)
刘慧博; 王静
2012-01-01
提出一种新型的无刷直流电机电磁转矩脉动抑制方法,该方法通过控制无刷直流电机导通相线电流跟踪给定电流来抑制电机的电磁转矩脉动.首先分析无刷直流电机数学模型,建立基于自适应遗传算法的无刷直流电机控制系统模型,由于自适应GA-ADRC控制器不需要无刷直流电机模型参数就可以实现干扰补偿,因此可以独立设计自适应GA-ADRC控制器.对文中所提出自适应GA-ADRC控制算法与经典PID控制算法的控制效果对比分析,控制效果明显优于传统PID控制效果.%The traditional PID control algorithm cannot satisfy the performance index of the brushless DC motor system because of the disadvantages of electromagnetic torque ripple, high complexity of detection method and control algorithm, and higher cost of current brushless DC motor. A novel electromagnet torque ripple suppression method of brushless DC motor was proposed in this paper. By virtue of controlling the conduction phase current of the brushless DC motor to track the given current, the motor electromagnet torque ripple was suppressed. The mathematical model of the motor was analyzed and a control system model of the brushless DC motor based on adaptive genetic algorithm was established. Since the adaptive GA-ADRC controller can realize disturbance compensation without model parameters of brushless DC motor, the GA-ADRC controller was independently designed. The comparative analysis shows that the proposed GA-ADRC control algorithm is obviously superior to that of the classical PID control algorithm.
一种抑制无刷直流电机转矩脉动的新方法%A Method to Suppress Torque Ripple of Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
谢少华; 瞿遂春
2015-01-01
对无刷直流电机转矩脉动产生的原因进行全面分析，提出增加前级直流变换器抑制转矩脉动的新方法，使用buck直流变换器，通过调整逆变器的母线电压来抑制转矩脉动，在MATLAB/Simulink环境下基于该方法搭建无刷直流电机仿真模型，并对系统进行仿真分析。仿真结果表明，该方法能够有效抑制无刷直流电机转矩脉动。%Analyzes comprehensively the torque ripple causes of brushless DC motor, and proposes a new method of adding the first stage DC converter to control torque ripple. By using buck DC converter and adjusting bus voltage of the inverter to suppress the torque ripple, on the basis establishes brushless DC motor model in MATLAB/Simulink and simulates the system. The result indicates that the method suppresses the torque ripple of brushless DC motor effectively.
Institute of Scientific and Technical Information of China (English)
王穆移; 马瑞卿; 孙银川; 徐蕾
2009-01-01
Researched the hybrid drive technology which based on the three - phase bridge inverter for the brushless DC motor (BLDCM) and the H-bridge inverter for the brush DC motor by making full use the resources of complex programmable logic devices (CPLD). It gave the overall design, different chopper ways and forward/reverse switch methods. Simulation results show that the hybrid driver has a character of high integration, and it can eliminate the competition adventure of the combination logics, and owns sev-eral functions, such as the fault protection, the choice of control ways, the embargo of logic, and so on.%充分利用可编程逻辑器件(CPLD)资源,研究了基于三相桥逆变器的无刷直流电动机(BLDCM)和基于H桥逆变器的有刷直流电动机的混合驱动技术,给出了总体设计、不同斩波方式及正、反转切换方法.仿真结果证明,混合驱动器集成度高,可消除组合逻辑竞争冒险,具有故障保护、控制方式选择和逻辑封锁等多种功能.
Control System of Two-Phase Brushless DC Gyro Motor Based on DSP%基于DSP的两相无刷直流陀螺电机稳速系统
Institute of Scientific and Technical Information of China (English)
吴梅锡; 付鲁华; 林玉池
2013-01-01
The research of the influence of gyro motor speed stability on the north-finding result is studied in order to improve the gyro north-finding precision. The paper introduces a two-phase brushless DC gyro motor control system based on TMS320LF2407A. First,it expounds the two-phase brushless DC motor's working principle. Then through the design of the hardware and software system, the close-loop control of two-phase brushless DC gyro motor is realized. The experimental results show that,the system can drive the brushless DC gyro motor well starting,braking and smooth running. The precision of the steady speed is less than 10~6 and the characteristics of the system satisfy the gyroscope demand.%为了进一步提高陀螺仪的寻北精度,分析研究了陀螺电机转速大小和转速精度对寻北结果的影响.在此基础上设计了一种基于TMS320LF2407A的两相无刷直流陀螺电机控制系统,阐述了两相无刷直流电机的工作原理,给出了电机的简化结构及数学模型,并通过对硬件系统和软件算法的设计实现了两相无刷直流陀螺电机的闭环控制.实验结果表明:系统可以很好地完成电机的启动、制动和平稳运行,转速精度优于10-6,满足陀螺仪的工作要求.
Study of Dual-redundancy Brushless DC Motor in Electric Aircraft Braking System%飞机刹车用双余度无刷直流电动机的研究
Institute of Scientific and Technical Information of China (English)
高金行; 全兴源; 戴志勇; 曹杨
2012-01-01
A study of dual redundant brushless DC motor in electric aircraft braking system was given. Based on Ansoft, the motor magnetic circuit was analyzed. The structure parameters were optimized. With the mathematical model of brushless DC motor, the simulation performance was shown. The key technologies of Commutation were analyzed. As shown of experiment, the design is reasonable and correct. Key words; dual redundant brushless DC motor; finite element analysis; performance simulation ; key developing technologies%以全电飞机刹车用双余度无刷直流电动机为研究对象,借助Ansoft软件对电机磁路进行分析计算,优化结构参数,并对其进行性能仿真.重点论述了确保无刷余度电机性能最优的调试关键技术.经过样机性能测试与设计相符,满足使用要求.
基于单片机的无刷直流电动机控制系统设计%Design of Brushless DC Motor Control System Based on MCU
Institute of Scientific and Technical Information of China (English)
闵次凡
2012-01-01
介绍了无刷直流电动机(BLDCM)的基本结构和工作原理.重点阐述了利用8751单片机控制无刷直流电动机的换相、调速、限制启动电流、正反转的原理和实现方法以及程序设计.%This paper introduces the basic structure and working principle of brushless DC motor (BLDCM). This paper expounds the principle and method to control the phase transformation, speed regulation, starting current limit, reverse rotation of brushless DC motor by single chip microcomputer 8751 , and the program design.
A Study of Direct Identification Method of Brushless DC Motor Parameters%无刷直流电动机参数直接辨识法研究
Institute of Scientific and Technical Information of China (English)
袁国珍; 齐蓉; 白文伟
2013-01-01
Against the brushless DC motor already in mass production, a new and practical parameter identification method called direct identification method was proposed. Based on the basic characteristics of the motor's equivalent circuit , the motor's parameter identification strategy was studied, which provided control parameters for precise control of motor. In order to verify the effectiveness of this method, a parameter identification simulation of a finished motor was used. The result indicates that this identification method is simple to implement, has a low computation, has recognition accuracy that can meet the engineering requirements, and is easier to be implemented than traditional identification methods.%针对已经量产、产品化的无刷直流电动机,研究了一种新的实用的无刷直流电动机参数辨识方法——直接辨识法.基于电机等效电路的基本特性,研究电机参数辨识策略,为精确控制电机提供控制参数.为验证该辨识方法的有效性,对一个成品电机进行参数辨识仿真,结果表明该辨识方法的优点是实现简单、运算量小、辨识精度可以满足工程要求,并且较传统辨识方法更易实现.
两相无槽无刷直流电机的无位置传感器控制%Sensorless control of two-phase slotless brushless DC motor
Institute of Scientific and Technical Information of China (English)
钟德刚; 方浩
2011-01-01
In order to eliminate the shortcomings of brushless DC motor control based on hall sensors and realize the sensorless control of two-phase slotless brushless DC motor,the structure of stator and rotor ,the winding connections of two-phase slotless brushless DC motor and the zero-crossing of back EMF detection method were analyzed. The hardware system and software system designs of two-phase slotless brushless DC motor were presented. The test results indicate the feasibility and stability of control system. A simple control circuit, low cost,less torque ripples and high stability are the advantages of the design presented.%为消除无刷直流电机基于霍尔位置传感器控制存在的缺点,实现两相无槽无刷直流电机的无位置传感器控制,首先在分析了两相无槽无刷直流电机的定、转子结构、绕组连接方式以及反电势过零点检测法的工作原理基础上,论述了两相无槽无刷直流电机无位置传感器控制的硬件系统和软件系统的设计方案,并对两相无刷直流电机进行了试验.试验结果证明了系统的可行性、稳定性.结果表明,该控制方案具有线路简单、成本低、转矩脉动小、系统运行稳定等优点.
PWM调制下无刷直流电机的转矩脉动抑制%Torque Ripple Reduction of Brushless DC Motors by PWM Modes
Institute of Scientific and Technical Information of China (English)
孟光伟; 李槐树; 熊浩
2011-01-01
分析无刷直流电机在PWM调制下稳态时的换相过程,通过在换相期间的PWM调制来实现高、低速条件下的换相转矩脉动补偿控制,确定了保持换相期间非换相相电流幅值不变的换相时间.分析PWM调制方式对三相六状态二二导通无刷直流电机控制系统的影响,提出了在PWM-ON-PWM调制方式下的换相转矩脉动补偿控制,不但能够完全消除非换相期间由于关断相出现电流而引起的电磁转矩脉动,而且能够完全补偿由于换相而引起的转矩脉动,实现电机在低速和高速时的无转矩脉动控制.%The steady commutation process of brushless DC motor by PWM modes was analyzed, and realized phase conversion torque ripple compensation control under both low speed and high speed operation by PWM control in commutation period,and confirmed commutation time to hold amplitude of current in commutation period. The effect by PWM modes on a three-phase six-state 120°conduction brushless DC motor was analyzed,and proposed torque ripple compensation control in PWM_ON_PWM mode, which can not only entirely eliminate torque ripple resulted from the current emerging in the turn-off phase during non-commutation period but also compensate torque ripple caused by the commutation current during commutation period. The torque ripple can be effectively reduced under both low speed and high speed operation using torque ripple compensation control in PWM ON PWM mode.
无刷直流电动机转子退磁故障的检测方法%Detection of rotor demagnetization fault on brushless DC motor
Institute of Scientific and Technical Information of China (English)
赵向阳; 葛文韬
2012-01-01
In order to study the demagnetization fault on brushless DC motor, the electro - motive - force (EMF) is resolved and the demagnetization fault is implemented based on the finite element method (FEA) with Ansoft/Maxwell. The system of brushless DC motor (BLDC) was simulated with Ansoft/ Simplorer software according to the mathematical model. In steady state, the fast Fourier transform (FFT) analysis was used on the stator current. The simulated model of detecting demagnetization based on the stator current signature analysis stator current signature analysis method was investigated and implemented ; the frequency used to indentify demagnetization fault, and the amplitude of frequency to estimate the demagnetization severity. In addition, the estimation of torque constant was used to detect the demagnetization fault. The results indicate that the stator current signature analysis can be used to detect the demagnetization fault when the speed pulsation is low and the estimation of torque constant method can be used to detect the demagnetization fault when the speed pulsation is high.%为了研究无刷直流电动机的转子退故障,基于Ansoft/Maxwell软件平台,设置转子退磁故障,建立求解电机反电动势的有限元模型；基于Ansoft/Simplorer软件平台,建立无刷直流电动机系统的仿真模型.在电机稳态运行下,对定子电流进行傅里叶分析,研究并建立基于定子电流监测转子退磁故障的仿真模型:退磁故障与特征频率的关系、退磁故障程度与特征频率幅值的关系.进一步,采用基于转矩常数估计的方法对无刷直流电机的转子退磁故障进行监测.仿真结果表明,在转速波动较小时采用定子电流分析法的效果更好,在转速波动较大时,采用转矩常数估计法可以在线监测无刷直流电动机转子的退磁故障.
The Research on Simulation Model of DTC with Brushless DC motor%无刷直流电机直接转矩控制系统仿真研究
Institute of Scientific and Technical Information of China (English)
宫殿强
2012-01-01
In this paper, the basic structure of the brushless DC motor starting, contacting the Direct Torque Control, it deduced improved brushless DC motor direct torque control system. The improved brushless DC motor direct torque control system's software model based full analysis of direct torque control principles and components, was presented by means of Matlab / Simulink software. The simulation results showed that the improved direct torque control had favourable dynamics and statics.%从无刷直流电机的基本结构出发,联系直接转矩控制理论,提出了改进型无刷直流电机直接转矩控制系统,在对系统的基本原理和组成部分进行充分分析的基础上,利用Matlab/Simulink建立了无刷直流电机直接转矩控制系统的软件模型.仿真结果表明改进型直接转矩控制系统具有良好的动静态性能.
基于DSP的无刷直流电动机控制系统的研究与设计%Research and Design of Brushless DC Motor Control System Based on DSP
Institute of Scientific and Technical Information of China (English)
王宪磊; 王淑红
2012-01-01
介绍了无刷直流电动机的基本结构、工作原理和运行特性，简述了基于DSP的无刷直流电动机的控制策略，对无刷直流电动机双闭环控制系统的硬、软件设计作了详细论述。文章所述无刷直流电动机控制系统的设计方案，可以获得良好的速度控制性能。% The basic structure, working principle and operation characteristics of brushless DC motor were introduced. The control strategy of brushless DC motor based on DSP was expounded, and the hardware and software design of the double closed loop control system was expounded in detail. The brushless DC motor control system described in this paper show good performance in speed control.
直流无刷高速电机驱动电路设计及改进%Design and Improvement of the High - speed Brushless DC Motor Drive Circuit
Institute of Scientific and Technical Information of China (English)
石屾; 董春
2011-01-01
采用无传感器无刷直流低速电机专用调速控制芯片ML4425,设计制作了航模用直流无刷高速电机的控制器.针对目前航模用直流无刷电机速度高的特点,对用于直流无刷低速电机的传统ML4425控制系统中的相关环节进行了改进,尤其是电机的启动、驱动和保护部分.简化了航模用直流无刷高速电机的控制系统,减少了成本.%In this paper,a dedicated control chip is used to design a drive circuit of a low speed sensorless DC brushless motor.This paper has done some change of the traditional control system of ML4425,in order to adapt to the high speed of the DC brushless motor used in aircraft model, especially in parts of start, drive and protect.Simplified the control system of the DC brushless motor,so it can reduce the cost.
Energy Technology Data Exchange (ETDEWEB)
Mozaffari Niapour, S.A.KH., E-mail: s.a.kh.mozaffari.niapour@gmail.com [Faculty of Electrical and Computer Engineering, University of Tabriz, 51664 Tabriz (Iran, Islamic Republic of); Danyali, S.; Sharifian, M.B.B.; Feyzi, M.R. [Faculty of Electrical and Computer Engineering, University of Tabriz, 51664 Tabriz (Iran, Islamic Republic of)
2011-08-15
Highlights: {yields} Employing the BLDC motor in water pumping systems. {yields} Utilizing the ZSI as a single-stage power converter in the PV water pumping systems based on BLDC motor. {yields} Improvement of the conventional IC MPPT method with the fuzzy logic control scheme to save more energy from the PV array. {yields} Taking the advantages of the DTC drive of the BLDC motor. {yields} Optimizing the water pumping system speed response characteristic by PSO. - Abstract: This paper discusses operation performance of a water pumping system consist of a brushless dc (BLDC) motor coupled a centrifugal pump and accompanying a Z-source inverter (ZSI) fed by a photovoltaic (PV) array, to be improved. Despite conventional double-stage power converters, this paper proposes utilizing a single-stage ZSI to extract the maximum power of the PV array and supply the BLDC motor simultaneously. Utilizing the ZSI provides some inherent advantages such as high efficiency and low cost, which is very promising for PV systems due to its novel voltage buck/boost capability. In addition, in order to precisely perform the maximum power point tracking (MPPT) of the PV array the fuzzy logic-incremental conductance (FL-IC) MPPT scheme is proposed. The proposed FL-IC MPPT scheme provides enough modification to the conventional IC method to enjoy an appropriate variable step size MPPT control signal for the ZSI. Moreover, direct torque control (DTC) is found more effective in comparison with hysteresis current control with current shaping to drive the BLDC motor, because it benefits from faster torque response, reduced torque ripple, less sensitivity to parameters variations, and simple implementation. In the mean time, due to the frequently variations of the PV power generation; delivered mechanical power to the centrifugal pump is variable. Thus, the BLDC motor should be driven with variable reference speed. In order to improve the speed transient response of the BLDC motor and enhance
无刷直流电机转子位置检测方法综述%Summary on Rotor Position Detection Method for Brushless DC Motors
Institute of Scientific and Technical Information of China (English)
赵一衡; 顾伟康; 陈亚彬; 曹翔
2014-01-01
由于受到传统开关器件的限制，大电流开关电源存在功率小、效率低等问题，因此在对PWM软开关技术进行分析后，利用AT89 C52单片机的中断方式输出频率和占空比可调的PWM脉冲，控制大功率开关管GT40 T101的通断，从而实现以模拟继电器的方式控制电路的通断。通过搭建电路验证了PWM软开关在控制大功率电源方面的优越性，对于实际的电气工程应用具有一定的参考价值。%The brushless DC motor (BLDCM) is an advanced mechanical electronic device.Rotor position detection method is an important part of the BLDCM.Traditional method with position sensor is not suitable the need for the current applications because of its own shortcomings, so the position detection method has been the research hotspot recently.The basic principle and research situation of sensorless detection methods are introduced , and their advantages and disadvantages are compared .It provides a certain theoretical basis for researching on sensorless and has certain value.
基于TB6556 FG的降低无刷直流电机噪声的设计%Design for Reducing Noise of Brushless DC Motor Based on TB6556 FG
Institute of Scientific and Technical Information of China (English)
陈治宇; 黄开胜; 陈风凯; 田燕飞; 何建源
2014-01-01
A minitype brushless DC motor of optimal magnet chamfering for 180o sinusoidal driving was designed to reduce vibration and noise of the motor. Firstly sinusoidal drive system was designed with TB6556FG and TP4124AK for suppressing mutation of commutation current;Finite element analysis software of ANSYS was employed to analyze brushless DC motor, and to calculate the optimal magnet chamfering for suppressing torque ripple. The motor was manufactured, and the vibration and noise of brushless DC motor were reduced effectively. This method could improve the characteristics of motors, and it was significant value to reduce vibration and noise of motors.%为降低小型无刷直流电机的振动和噪声，设计了一种180º正弦波驱动的具有最佳磁极削角的无刷直流电机。采用TB6556FG控制器和IPM模块TP4124AK构建正弦波驱动系统，来抑制换向电流的突变。结合ANSYS有限元分析软件对无刷直流电机进行分析，计算出最佳的磁极削角尺寸，来抑制转矩脉动，并进行了样机试验，电机的振动和噪声抑制效果明显。该方法可有效改善电机性能，对降低电机的振动和噪声具有一定的工程应用价值。
永磁无刷直流电动机在微型空压机中的应用%Application of Permanent Magnet Brushless DC Motor in Miniature Air Compressor
Institute of Scientific and Technical Information of China (English)
凌永骧; 张华宗; 余仁田
2013-01-01
Compared with the traditional DC motor and induction motor,permanent magnet brushless DC(BLDC) motor has more superior performance,widely used in many fields,and has a tendency to gradually replace other motors.In this paper,the development and application of permanent magnet brushless DC motor in the miniature air compressor are analyzed.%永磁无刷直流电动机(简称BLDC)与传统的直流电机及感应电动机相比,永磁无刷直流电动机具有更多优越的性能,在许多领域得到了广泛应用,有逐步取代其它电动机的趋势.本文对永磁无刷直流电动机在微型空压机中的应用和发展情况进行分析.
电动汽车用无刷直流电机控制器设计%Controller Design for DC Brushless Motor of Electric Vehicle
Institute of Scientific and Technical Information of China (English)
舒雄; 杜荣华; 柴健; 舒刚华; 李亚中
2015-01-01
针对四轮独立驱动电动汽车所用电机须调速性好、可靠性高的特点，从工程应用出发，设计一种以dsPIC及MC33035为核心的无刷直流电机控制器。阐述了控制方案及工作原理，给出了硬件电路组成和调速方法。把该控制器运用到自行研制的四轮独立驱动电动汽车上进行测试，其结果表明，该控制器不仅具有响应速度快、调速性能好和稳定性高的特点，且开发成本低，具有广泛的应用价值。%Based on dsPIC and MC33035, a kind of controller is designed for brushless dc motor with good speed regulating and high reliability, which is used in electric car with four-wheel independent drive. The control plan and operating principle are outlined, and the corresponding hardware circuit structure and speed regulation method are introduced. The controller was applied to test self-de-veloped electric car with four-wheel independent drive. The results indicate that the controller have characteristics of fast response, good speed control performance and high stability with low cost and extensive application.
一个新的适用于无刷直流电机驱动的单电流传感器技术%A Novel Current Sensor Technique for Brushless DC Motor Drives
Institute of Scientific and Technical Information of China (English)
谭徽; 江建中; 汪信尧; 王勇
2000-01-01
The torque output in a permanent magnet brushless DC motor (BLDCM) is usually controlled by regulating the motor phase currents. In this paper, three kinds of PWM strategies together with some critical review on traditional current measurements in a BLDCM drive system are discussed. A novel method for assessing the PWM information and measuring the motor phase currents by a dc link current sensor is proposed. An attractive feature of the proposed method is the simplicity with the current sample processing because there is no need to incorporate the conduction information of the power switches or diodes. Only the single sided PWM or the double sided complementary PWM is needed with the proposed technique.
基于DSP的小功率无刷直流电动机驱动器设计%Design of Low-power Brushless DC Motor Driver Based on DSP
Institute of Scientific and Technical Information of China (English)
侯玉宝; 欧阳宁; 王景芳
2012-01-01
There was an increasing demand for low power brushless DC motor in the appliance industry nowadays , in order to meet the requirements of higher performance about the motor control system, a low power brushless DC motor drive was designed out in this paper using TFs dedicated motor control chip TMS320F2812 digital signal processor. The hardware and software structure and control strategy of the drive were introduced in detail, and the experimental results show that the system has the characteristics of shorter response time, better steady performance and anti-interference ability.%现在家电行业对小功率无刷直流电动机的需求日见增多,为了满足用户对电机控制系统产品性能的更高要求.采用TI公司的数字信号处理器TMS320F2812专用电机控制芯片,设计了一种小功率无刷直流电动机的驱动器.详细介绍了该驱动器的硬件电路组成和软件结构及控制策略,通过实验结果表明该系统响应时间短,稳态性能好,抗干扰能力强等特点.
基于模糊预测控制的无刷直流电机控制研究%Study on Brushless DC Motor Control Based on Fuzzy Predictive Control
Institute of Scientific and Technical Information of China (English)
王玉娟; 张艳
2015-01-01
针对传统控制方法在对永磁无刷直流电机(Brushless DC Motor,BLDCM)进行控制时鲁棒性差、精度低、实时性不理想等缺点,提出了一种模糊与预测相结合的控制算法。将该算法应用于永磁无刷直流电机双闭环调速系统的转速闭环中,并利用 MATLAB 软件搭建无刷直流电机的控制系统进行仿真。实验结果表明该算法利用模糊控制与预测控制各自的优点,提高了无刷直流电机的性能,是可行和有效的。%When the Brushless DC Motor(BLDCM)is controlled by traditional methods,it is weak in robustness,accuracy and real-time .A fuzzy predictive control method is proposed in this paper.The control algorithm is applied in the double loop of speed servo system of BLDCM.The control system of Brushless DC motor is built and simulated by the MATLAB software.Ex-periments results show that the control algorithm combines the advantages of the fuzzy control and the predictive control and im-proves the performance of the BLDCM.This control method is proved to be feasible and effective.
Permanent magnet brushless motor control based on ADRC
Directory of Open Access Journals (Sweden)
Li Xiaokun
2016-01-01
Full Text Available Permanent magnet brushless motor is a nonlinear system with multiple variables, the mathematical model of Permanent magnet brushless motor is difficult to establish, and since that the classic PID control is hard to precisely control the motor. Active disturbance rejection control (ADRC technique is a new nonlinear controller which does not depend on the system model. It is starting from the classic PID control, and establishing the loop control system by error negative feedback, the ESO(extended state observer observing system which comes from the observer theory of modern control theory to observe internal and external perturbations. ADRC inherits the advantages of PID with little overshoot, high convergence speed, high accuracy, strong anti-interference ability and other characteristics, and it has a strong disturbance adaptability and robustness as for the uncertainty perturbation and their internal disturbance of control objects. Therefore, This paper attempts to use Active disturbance rejection control(ADRC, in order to improve the control of permanent magnet brushless motor. In this design of control system, the simulation of the system is realized based on MATLAB, and then the discrete control algorithm is transplanted to the embedded system to control the permanent magnet brushless DC motor (PMBLDCM. The control system is implemented on the DSP-F28335 digital signal processor, and the DSP also provides the functions like voltage and current AD sampling, PWM driver generation, speed and rotor position calculation, etc. The simulation and experiment results indicate that, the system has good dynamic performance and anti-disturbance performance.
永磁直线直流电机控制系统设计与实验研究%Design and Experiment for Linear Permanent Magnet Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
尹曾锋
2012-01-01
本文详细介绍了基于DSP TMS320LF2407的永磁直线直流无刷电动机硬件设计和PWM控制方法,给出了电机的控制程序流程,试验结果表明该方法简单可行。%This paper introduces a DSP-based PWM timing method for linear permanent magnet brushless DC motor in detail. The test results show that the method of control program is simple and feasible in practice.
Institute of Scientific and Technical Information of China (English)
马余洋
2015-01-01
A kind of high-efficiency DC brushless pumping motor together with its simple manufacturing pro-cess was introduced. The contents were included with the performance of 2-pole PM rotor, detailed stator construction and the manufacturing for the winding as well as relative control method.%介绍了一种效率高且制造工艺简单的无刷直流水泵电机。内容包括两极永磁体转子的性能、定子结构和绕组的制造及其控制方法。
Nehl, T. W.
1980-12-01
A discrete state space model of a power conditioner fed permanent magnet brushless dc motor for aerospace and electric vehicle applications is developed. The parameters which describe that machine portion of this model are derived from a two dimensional nonlinear magnetic field analysis using the finite element method. The model predicts the instantaneous mechanical and electrical behavior of a prototype electromechanical actuator for possible use on board the shuttle orbiter. The model is also used to simulate the instantaneous performance of an advanced electric vehicle propulsion unit. The results of the computer simulations are compared with experimental test data and excellent agreement between the two is found in all cases.
Institute of Scientific and Technical Information of China (English)
吴春华; 陈国呈; 孙承波
2007-01-01
In order to deal with torque pulsation problem caused by traditional control method for brushless DC(BLDC)motor and to achieve high precision and good stability,a novel control strategy is proposed.Compared with the traditional control scheme,by using phase voltage as a control objective and making waveform of phase current approximately quasi-sinusoidal,torque ripple of BLDC motor is reduced from the original 14% to 3.4%,while toque is increased by 3.8%.Furthermore,by detecting zero-crossings of back electromotive force(BEMF)with non-conducting phases,sensorless control is realized.The new control strategy is simple.It carl minimize torque ripple,increase torque,and realize sensorless control for BLDC motor.Simulation and experiments show good performance of BLDC motor by using the new control method.
基于磁编码器无刷直流电机转速及位置的检测*%Detection of Brushless DC Motor Speed and Location Based on Magnetic Encoder
Institute of Scientific and Technical Information of China (English)
郭丹; 王大明; 李寒
2015-01-01
论文采用了磁编码器作为无刷直流电机位置传感器，介绍了其工作原理和输出模式，以及相应的电机转子位置和转子速度测量的几种方法。最后给出了基于STM32F407ZG的无刷直流电机转子位置和转速测量单元的实现，实验表明，该方案具有良好的精确度及可靠性。%Regarding magnetic encoder as position sensor of the brushless DC motor ,the operating principle and output modes of magnetic decoder ,as well as the measuring methods of rotor position and rotor speed are introduced .Finally the uint of measuring rotor position and rotor speed of the brushless DC motor based on STM32F407ZG are achieved ,and the experiments show that the scheme has good accuracy and reliability .
Ironless-armature brushless motor
Fisher, R. L.
1977-01-01
Device uses 12-pole samarium cobalt permanent-magnet rotor and three Hall-effect sensors for commutation. In prototype motor, torque constant (3-phase delta) is 65 oz-in/amp; electrical time constant (L/R) is 0.2 x 0.001 sec, and armature resistance is 20 ohms.
Institute of Scientific and Technical Information of China (English)
杨立宏
2015-01-01
随着永磁材料和控制技术的不断进步,直流无刷电机的功率越来越大,其优势包括效率比较高、使用时间长、噪声非常小、转速平稳、输出转矩大等,它在小型船舶的电力推进系统中扮演着越来越重要的角色。目前,直流无刷电机在船舶上的工作效果不理想,阻碍其在高性能电力推进船舶中大量的普及推广。直流无刷电机简称BLDCM,其关键问题是电机的控制策略、转矩稳定控制以及无位置传感器。本文根据 BLDCM 的速度环和电流环的响应特点,利用传统的 PID 算法和现代模糊控制算法,设计了相应的硬件系统和软件系统,然后建立了基于 DSP 的小型船舶直流无刷电机控制装置。实验结果显示,采用模糊 PID 算法对电机进行控制的效果更好,可以实现脉动更小的输出转矩和更大的转速,同时此系统能够在小型船舶的电力推进系统中稳定、持续地工作,能够满足实际应用的要求。%With the progress of magnetic materials and control technology, brushless DC motor power is growing, its advantages include high efficiency, long life, noise is very small, steady speed, output torque, etc. , it is small ship electric propulsion system increasingly important role in the actor. Currently, the brushless DC motor operating performance on a ship is not ideal, hinder its propulsion in a lot of the popularization of high-performance power. Brushless DC motors referred BLDCM, the key issue is the control strategy of the motor, the torque stability control, and no position sensor. In this paper, the characteristics of loop and current loop response based BLDCM speed, using traditional PID algorithms and modern fuzzy control algorithm, designed the corresponding hardware and software systems, and the establishment of a small ship DSP-based brushless DC motor control device. Experimental results show that the fuzzy PID algorithm to better motor control, can achieve a
Institute of Scientific and Technical Information of China (English)
段晓妮; 孙纯祥
2012-01-01
A high-accuracy constant-speed system of great angular momentum permanent magnet brushless DC gyro motor was introduced. Based on the analysis of the operational principle of the brushless DC gyro motor, a speed closed -loop control strategy was designed, and the model of the BLDCM and controller was proposed in Simulink. DSP and CPLD were used as the main components of the controller. Piecewise PI was used as the control algorithm on steady speed. The motor was controlled by the combination of hardware and software to achieve soft start, protection of over current and steady speed controlling. Through prototype testing, the result shows that such control strategy has short starting time, high starting reliability and high-accuracy steady speed.%介绍了一种大角动量永磁无刷直流陀螺电动机的高精度稳速控制系统.在研究无刷直流陀螺电动机运行原理的基础上,应用了一种简单实用的速度闭环控制策略,并在Simulink中建立电机本体及控制模型.陀螺电动机的主控制器由硬件电路和软件程序组成.DSP和CPLD作为控制器主体,以分段PI算法为稳速控制方法,两者配合实现了软起动、过流保护和稳速控制等功能.样机试验结果表明,该控制系统起动迅速、起动可靠性高及稳速精度高.
Permanent magnet brushless motor control based on ADRC
Li Xiaokun; Wang Song; Wang XiaoFan; Shi Tingting
2016-01-01
Permanent magnet brushless motor is a nonlinear system with multiple variables, the mathematical model of Permanent magnet brushless motor is difficult to establish, and since that the classic PID control is hard to precisely control the motor. Active disturbance rejection control (ADRC) technique is a new nonlinear controller which does not depend on the system model. It is starting from the classic PID control, and establishing the loop control system by error negative feedback, the ESO(ext...
Institute of Scientific and Technical Information of China (English)
秦虎; 王孝利; 程远; 罗新华
2012-01-01
Based on the theoretical analysis and experimental verification on shaft breakdowns of the high-speed brash-less DC motor,a new test method was proposed to improve the present ones. The method was applied to the testing process of high-speed brushless DC motor. The experimental results demonstrate that this method is correct and effective.%针对高转速无刷直流电动机寿命试验中出现的转轴卡死故障进行理论分析和试验验证,找出现行的试验方法的不足,结合高转速无刷直流电机的运动特性,提出了一种新的试验方法并将其应用于实际试验过程中,通过试验验证了方法的正确和有效.
Institute of Scientific and Technical Information of China (English)
隋妮; 王广萍; 李仲兴; 张德望; 顾剑波
2011-01-01
基于再生制动理论,以电动汽车用轮毂电机为主体,搭建了直流无刷电机再生制动试验台.以回收能量最大化为目标,提出了相应的再生制动控制策略.结合电机的输出特性和工作原理,利用SIMULINK软件建立了再生制动系统模型.通过模型仿真和试验台试验结果的对比分析,验证了再生制动试验台设计方案的可行性和控制策略的合理性.%Basod on theory of regenerative braking, with electric vehicle hub motor as subject, a brushless DC motor regenerative braking test bench is built. To maximize energy recovery, regenerative braking control strategy is proposed in the paper. In accordance with output characteristic and working principle of motor,regenerative braking system is established with software SIMULINK.By modeling simulation and contrastive analysis of the test result, feasibility of design program of regenerative braking test bench and rationality of control strategy are validated.
Institute of Scientific and Technical Information of China (English)
白娅梅; 罗玲; 黄其
2012-01-01
The design of 9kW permanent magnet brushless DC motor using the combination of magnetic circuit and electromagnetic field solution was presented in the paper. Main electromagnetic parameters, the number and shape of stator slot, the structure of stator and rotor were determined by using the equivalent magnetic circuit while no-load electromagnetic field and speed-torque characteristic were analyzed by means of electromagnetic field analysis software MagNet. The test values of no-load speed and current of the prototype motor match well with the results of simulation analysis. The validity of this method was shown in the motor design.%采用场路结合法设计9kW永磁无刷直流电动机,用磁路法确定电机的主要电磁参数、定子槽数和槽形、转子的磁路结构,运用电磁场分析软件MagNet分析计算空载磁场和机械特性,样机的空载转速、电流与仿真分析结果相一致,验证了采用场路结合法设计电机的有效性.
Novel Resonant Pole Voltage Source Inverter for Brushless DC Motor%新型无刷直流电动机专用谐振极逆变器研究
Institute of Scientific and Technical Information of China (English)
贺虎成; 杜京义; 刘卫国
2009-01-01
无刷直流电动机通常采用硬开关逆变器驱动.硬开关逆变器的系统效率较低,散热器的体积和重量较大,限制了无刷直流电动机驱动系统功率密度和性能的进一步提升.针对硬开关逆变器问题,提出了一种无刷直流电动机驱动系统专用的谐振极软开关电压源逆变器.通过在传统硬开关逆变器三个输出端和直流母线之间添加辅助谐振单元,实现了逆变桥主开关器件的PWM软开关动作.谐振控制开关零电流开关条件开通,零电压开关条件关断.对提出的新型谐振极逆变器进行了数学分析和仿真研究;仿真结果验证了电路结构和理论分析的正确性与可行性.%The brushless DC motor (BLDCM) has high torque, compact size, and high efficiency.Therefore, BLDCM is widely used in computers, household and industrial products, and automobiles.It is usually driven by a hard-switching PWM inverter, which has low switching frequency, high switc-hing loss, high EMI and acoustic noise, etc. To improve performance in brushless DC motor system,proposed a novel resonant pole voltage-source-inverter (VSI) for BLDCM. Realized soft switching oper-ation of switch devices in inverter by adding auxiliary remnant unit from three output ends to DC link.Auxiliary resonant switch was turned on under zero current switching (ZCS) and turned off under zero voltage switching (ZVS). Mathematic analysis and simulation were performed for novel inverter, and the simulation results were consistent with the theoretical analysis.
基于Maxwell的单相无刷直流电动机分析与设计%Analysis and Design of Single-phase Brushless DC Motors Using Maxwell
Institute of Scientific and Technical Information of China (English)
陈文敏; 黄开胜; 何良远; 杨勇
2013-01-01
This paper designed a single phase brushless DC motor of 2000 r/min,6 poles,200 V,100 W,and presented the way to design the motor.The motor was manufactured and tested.The paper established a 2D finite element analysis model for the motor using Maxwell of Ansoft,and then simulated some static and dynamic performances of the motor.The paper provided test results together with its simulation results.The errors between the simulation results and the test results were less than 8％,which confirmed the accuracy of the 2D finite element model and the simulation with the model.%以一款2000 r/min、6极、200 V、100 W单相无刷直流电动机为例,给出了设计这种单相无刷直流电动机的思路,完成了电磁方案设计,并试制了样机,进行了有关性能测试.利用Ansoft/Maxwell建立了这款电动机的二维有限元仿真模型,对其静态和动态性能进行仿真.仿真结果与样机试验结果各项性能指标误差在8％以内,验证了仿真模型和仿真分析的准确性.
Institute of Scientific and Technical Information of China (English)
周扬忠; 林启星; 马俊亭
2013-01-01
A key issue in the direct torque control (DTC) of permanent magnet brushless DC motor (BLDCM) is the estimation of the instantaneous electromagnetic torque.Additionally,some BLDCMs also have saliency phenomenon which augments the difficulty of torque estimation.A sensorless toque estimator was proposed in this paper.A stator current estimator with rotor back-electromotive-force (BEMF) self-adaptation was firstly constructed according to stator current state equations and the rotor BEMF was gained by adaptive law.Then,a lock-phase loop was used to output smooth rotor position angle estimation value on basic of identified rotor BEMF.At last,the torque was calculated to realize saliency BLDCM-DTC based on the estimated rotor position angle.The experimental results show the estimated torque is very close to the actual value,and the novel sensorless DTC drive has quick dynamic response and smooth operation with a minimum steady-state speed lowering to 33 r/min.%电磁转矩的准确观测是实现永磁无刷直流电机(brushless DC motor,BLDCM)直接转矩控制(direct torque control,DTC)的关键.另外,有些BLDCM还具有一定的凸极现象,增加了电磁转矩观测的难度.为此,该文针对凸极式BLDCM-DTC驱动提出一种无位置传感器型电磁转矩观测器.该观测器利用BLDCM定子电流状态方程构建一个转子反电动势自适应的定子电流观测器,利用自适应机制推导出转子反电动势辨识值；根据辨识的转子反电动势,采用锁相环输出平稳的转子位置角观测值；基于该观测角,计算出电磁转矩,实现凸极式BLDCM-DTC系统平稳运行.实验结果表明,所提观测器观测的电磁转矩与实际值非常接近；无位置传感器DTC系统动态响应迅速,稳态运行平稳,最低运行转速可达33 r/min.
Comparison of solar panel cooling system by using dc brushless fan and dc water
Irwan, Y. M.; Leow, W. Z.; Irwanto, M.; M, Fareq; Hassan, S. I. S.; Safwati, I.; Amelia, A. R.
2015-06-01
The purpose of this article is to discuss comparison of solar panel cooling system by using DC brushless fan and DC water pump. Solar photovoltaic (PV) power generation is an interesting technique to reduce non-renewable energy consumption and as a renewable energy. The temperature of PV modules increases when it absorbs solar radiation, causing a decrease in efficiency. A solar cooling system is design, construct and experimentally researched within this work. To make an effort to cool the PV module, Direct Current (DC) brushless fan and DC water pump with inlet/outlet manifold are designed for constant air movement and water flow circulation at the back side and front side of PV module representatively. Temperature sensors were installed on the PV module to detect temperature of PV. PIC microcontroller was used to control the DC brushless fan and water pump for switch ON or OFF depend on the temperature of PV module automatically. The performance with and without cooling system are shown in this experiment. The PV module with DC water pump cooling system increase 3.52%, 36.27%, 38.98%in term of output voltage, output current, output power respectively. It decrease 6.36 °C compare than to PV module without DC water pump cooling system. While DC brushless fan cooling system increase 3.47%, 29.55%, 32.23%in term of output voltage, output current, and output power respectively. It decrease 6.1 °C compare than to PV module without DC brushless fan cooling system. The efficiency of PV module with cooling system was increasing compared to PV module without cooling system; this is because the ambient temperature dropped significantly. The higher efficiency of PV cell, the payback period of the system can be shorted and the lifespan of PV module can also be longer.
Institute of Scientific and Technical Information of China (English)
李保军; 王志新; 吴定国
2012-01-01
采用Ansoft中基于磁路法的RMxprt模块对2 kW/100 Wh容量的飞轮储能试验系统中所用的高速永磁无刷直流电机进行了具体设计,并在Ansoft Maxwell 2D中运用有限元的方法分析了电机内电磁场的分布情况及电机的静态和动态特性,分析结果表明所采用的电机方案能够满足飞轮储能系统的要求,具有一定的可行性和实用性.与传统的设计方法相比,提高了效率和精度,具有很强的工程实用性.%The RMxprt module of Ansoft was adopted to design the permanent brushless DC motor for the 2 kW/ 100 Wh flywheel energy storage system, the magnetic field distribution of the motor was calculated through the method of finite element analysis method in Ansoft Maxwell 2D,the static and dynamic characteristic of the motor was also analyzed. The results showed that the design scheme which is feasible and practical of the motor can meet the demand of the flywheel energy storage system. Compared with the traditional design method, efficiency and accuracy has been greatly improved and it also has a strong engineering practicability.
Institute of Scientific and Technical Information of China (English)
秦刚; 谭进; 吴丹怡; 杜超
2012-01-01
针对无刷直流电机中传统PID控制器参数调节复杂、对环境适应能力较弱等问题，在分析内模控制与经典PID控制的内部对应关系的基础上，综合其优点，设计采用了一种基于内部模型的PID控制器（简称IMC-PID）对无刷直流电机进行调速。在建立对象理论模型的基础上，通过对控制器在线仿真比较表明：针对本设计对象，基于内部模型的PID控制器不论在系统阶跃响应或是扰动跟踪等控制效果上都能到达经典PID控制的要求，同时还降低了参数设计的复杂性和随机性。%This paper focuses on the problem that complexity and inconvenience of the traditional PID controller parameters adjustment and the weakness of its ability to adapt to the environment in brushless DC motor, analyzes the internal corresponding relationship of the internal model control and the classic PID, combines their advantages, designs a PID controller based on internal model to control speed of the brnshless DC motor. Based on the creation of object theoretical models, the online simulation and compare of controller shows that： to this object, the PID controller based on internal model can reach the requirements of the classic PID control in system step response and disturbance tracking control, while reducing the complexity and randomness of the parameters design.
Institute of Scientific and Technical Information of China (English)
张寿春
2012-01-01
In order to protect the electric actuator driven by the brushless DC motor and controller for locked rotor,avoid the controller is damaged.The method of protection of taking LPC2132 central processing unit and hardware circuit of electric current collected of the control system,at same time intelligent judgment and treatment by using the method of software.Realization of intelligent control in the state of locked rotor,protect the controller.The experiment shows that： the system has reliability and the advantages of processing locked rotor in intelligent mode.%为了防止直流无刷电机驱动的执行器因电机堵转而损坏控制器,控制系统采用以LPC2132微处理器和电流采集等电路相结合的硬件保护方法,同时采用软件进行智能判断与处理。实现了电动执行器在堵转的状态下的智能控制,保护了控制器。实验结果表明：该系统具有可靠性高及智能处理堵转等优点。
Design of Brushless DC Motor Controller Tracking Complex Position Curve%实现复杂位置曲线跟踪的直流无刷电机控制器设计
Institute of Scientific and Technical Information of China (English)
许家林; 王鹤; 朴仁官
2012-01-01
In order to resolve the problem that exiting Brushless DC (BLDC) motor controllers are incapable of tracking a complex position curve due to their low-frequency command reception, a BLDC motor controller was designed with enhanced reception that was able to handle instructions updating at a rate of 1 kHz. In the aspect of hardware, the microcontroller ARM Cortex-M3 was used as the CPU and the chip A4936 was a-dopted as its 3-phase bridge pre-driver. In the aspect of software, a PID control algorithm with speed and acceleration feed-forward was applied. Tests were implemented using instructions which update at a rate of 1 kHz, the results acquired illustrated that the BLDC motor controller has high tracking precision and fast response speed.%针对现有的无刷直流电机控制器不能接收高频数字指令以实现复杂位置曲线跟踪的问题,设计了指令更新速率高达1 kHz的控制器.硬件上,采用ARM Cortex-M3微控制器作为处理器,使用芯片A4936作为3相桥的换相逻辑控制器.软件上,应用了带有速度、加速度前馈的PID控制算法.使用更新速率是1 kHz的指令进行测试,结果表明,有很高的跟踪精度和较快的响应速度.
Institute of Scientific and Technical Information of China (English)
吕伟鹏
2011-01-01
In order to analyze and design the control system of BLDCM effectively,a new method of modeling and simulation for brushless DC motor under Matlab is proposed,this method is based on modular.Each module is described in detail.and then test the control system with a classic double-loop control method of modeling and simulation. The experimental results shows that the waveform of simulation consistent with analysis of theoretical The intergral separation which used in PI regulator makes zero-shoot on speed, and the system runs stability.It provides a great convenience for designing and debugging the system.%为了有效地分析和设计BLDCM控制系统，基于Matlab提出了一种新型的模块化的BLDCM控制系统仿真建模的方法。对各个模块进行了详细说明。最后，采用经典的速度、电流双闭环控制方法对该建模方法进行了仿真测试。结果表明仿真波形符合理论分析。转速环引入了积分分离的PI调节器使超调量为零，系统特性稳定，它为实际系统设计和调试工作提供了极大方便。
基于自适应DRNN的无刷直流电机控制方法研究%Study on Control Method of Brushless DC Motors Based on Self-adaptive DRNN
Institute of Scientific and Technical Information of China (English)
王立标; 李军; 范剑; 李绣峰
2011-01-01
针对无刷直流电机速度控制存在高度非线性特性,提出了基于自适应DRNN（diagonal re-current neural network）的＂前馈＋反馈＂控制方法。反馈控制器以目标转速与实际转速的误差为输入量,采用PI控制来提高控制系统的稳定性。前馈控制器采用DRNN,以反馈控制器的输出作为性能误差进行自适应控制,以提高控制系统的瞬态响应性能。仿真和实验结果表明：该控制系统能较好地跟踪目标转速,在突变负载扰动下,能有效地改善相电流波形,降低电机电磁转矩脉动,而且该控制系统具有较强的鲁棒性。%In view of brushless DC motor speed control for highly nonlinear characteristics,a self-adaptive DRNN control system was proposed.The controller consisted of a PI feedback controller and a self-adaptive DRNN feed-forward controller.The PI feedback controller used target speed and actual speed error for input to improve the stability of control system.The feed-forward controller was trained by using feedback controller outputs as learning error to improve transient performance of control system.The simulation and experimental results illustrate that the control system can track the target speed,reduce the torque ripple and improve the current waveform under load disturbances,which has strong robustness.
Design and Test of the Controller for EPS System with Brush-less DC Motor%无刷直流电机助力式EPS控制器设计与试验
Institute of Scientific and Technical Information of China (English)
江浩斌; 唐斌; 耿国庆
2011-01-01
基于无刷直流电机(BLDCM)模型和汽车电动助力转向(EPS)动力学模型,构建了BLDCM控制仿真模型和EPS性能仿真模型；设计了以ARM7 LPC2131为控制器内核和以MC33034P120为驱动模块的EPS控制器硬件；分析了EPS的助力、回正和阻尼控制对控制器硬件的要求,给出了EPS控制软件的主程序和A/D、速度信号采集与中断服务子程序流程；最后将BLDCM助力式EPS及其控制系统装车进行原地转向试验和蛇形试验,试验结果表明,所设计的EPS控制器与整车匹配良好,性能稳定.%Based on the model for brush-less DC motor (BLDCM) and the dynamic model for electric power steering (EPS) system, the simulation models for BLDCM control and EPS performance are set up. The EPS controller hardware with ARM7LPC2131 as its core and MC33034P120 as drive module is designed, and the requirements of power assistance, aligning and damping controls on controller hardware are analyzed. The flow charts of main program and its subroutine for A/D and speed signals acquisition and interrupt service are given. Finally the BLDCM assisted EPS and its control system are installed on a newly-launched car for spot turn and slalom tests. The results of tests show that the EPS controller designed well matches the vehicle with stable performance.
Institute of Scientific and Technical Information of China (English)
周西峰; 孙浩; 王丹; 郭前岗
2011-01-01
This paper analyzes the main problems of brushless DC motor(BLDCM) driving control system using bootstrap driving method. It is noted that PWM scheme is restricted when bootstrap driving method is adopted,thus initiated problems of more torque ripple, the diode freewheeling of the inactive phase, difficulties in sensorless BLDCM control and the heat generation of power switches.The basic reasons of those problems are profoundly analyzed through theoratical and mathmatical methods,and the correctness of the conclusion is also verified by experiment. Meanwhile, solution is also proposed for those which have requirements on more restricted specifications.%详细分析了自举驱动方式下无刷直流电机(BLDCM)控制系统中存在的主要问题,指出了因采用自举驱动带来的PWM调制方式受限问题以及由此引发的转矩脉动、非导通相续流、无位置传感器控制实施困难和开关管发热问题.在此通过原理分析和公式推导,深入分析了产生上述问题的根本原因,并通过实验验证了所推结论的正确性,同时给出了在控制指标要求较高的场合解决上述问题的方法.
Institute of Scientific and Technical Information of China (English)
李怀兵; 丑武胜; 冯震
2011-01-01
Torque ripple is an important factor affecting the performance of Brushless DC motor (BLDCM).In this paper, the non-commutation torque ripple was analyzed, focusing on the torque ripple caused by PWM_ON modulation.The main part of the torque ripple was caused by the PWM_OFF, and the diode freewheeling of inactive phase can compensate the torque ripple to some extent.Meanwhile, hysteresis current control was proposed to suppress the non-commutation torque ripple.The simulation and experiment show the difference between the method and the traditional method, and prove the validity of the method suppressing the torque ripple during non-commutation.%无刷直流电机的转矩脉动是影响其性能的重要因素.该文针对非换相期间的转矩脉动进行了分析,重点研究了PWM_ON调制方式时的转矩脉动.PWM信号为"OFF"时续流引起的转矩脉动占主要部分,非导通相续流在一定程度上可以补偿PWM关断时造成的转矩脉动.同时,提出使用滞环电流控制方法,采用该方法可以抑制非换相期间转矩脉动.通过仿真分析和实验验证了该方法和传统方法的差异,证明了该方法在非换相期间抑制转矩脉动的有效性.
Institute of Scientific and Technical Information of China (English)
董艺
2012-01-01
对用TMS320C242控制稀土永磁无刷直流电机（REPMBLDCM）进行了深入的探讨。作为驱动设备,稀土永磁无刷直流电机在很多方面性能优于普通直流电机;作为控制核心,TMS320C242无论是集成度还是控制速度都远超普通的单片机。所以用TMS320C242控制REPMBLDCM可获得极为优秀的控制效果和驱动性能。%A deep discussion has been made on how to control rare earth permanent magnet brushless DC motor with TMS320C242. As a driving device, rare earth permanent magnet brushless DC motor is superior to the common DC motor in many ways. As a core of the control system, TMS320C242 is far more superior to the common single chip microcontroller unit whether on its integration or its controlling speed. Therefore, excellent control effects and driving properties can be obtained by adopting TMS320C242 to control REPMBLDCM.
Directory of Open Access Journals (Sweden)
E. Kaliappan
2012-01-01
Full Text Available Problem statement: In this study, a simplified modeling and experimental analysis of Permanent Magnet Brushless DC (PMBLDC motors for Sensorless operation using MATLAB/SIMULINK. This model provides a mechanism for monitoring and controlling the voltage, current, speed and torque response. Approach: BLDC motor is modeled as sub-blocks. The inverter and switching function are implemented as S-function builder block. The Sensorless scheme employs direct back emf based zero crossing detection technique. Results: The proposed model with Sensorless control technique with back emf zero crossing detection is tested in the BLDC Motor and the performance was evaluated. The simulated and experimental results show that the proposed modeling works quite well during starting and running conditions. Conclusion/Recommendation: The developed model consists of several independent sub-blocks, that can be used in the modeling of Permanent Magnet Sinusoidal Motor and induction motor. Hence the developed simulation model is a design tool to study the dynamic behavior of Sensorless Controlled Brushless DC Motor.
Research and application of dual-mode operation technology of brushless DC motor%无刷直流电机双模控制技术研究与应用
Institute of Scientific and Technical Information of China (English)
李凤祥; 朱伟进
2013-01-01
针对无刷直流电机的无位置传感器控制“三段式”起动技术的缺陷,以电动自行车为研究对象,采用反电动势过零点检测方法和相位补偿技术,通过改进反电动势检测电路,优化无位置传感器控制的起动方法,设计出基于相位补偿的双模式运行无刷直流电机控制方案,使无刷直流电机可运行在有位置传感器和无位置传感器两种模式下,当位置传感器信号输出正常时,电机默认运行在有位置传感器模式;若位置传感器信号输出不正常,电机自动切换运行在无位置传感器模式.实验证明,反电势检测电路灵敏度高,且很好的实现了相移补偿,两种模式切换过程平稳,运行状态平稳.%Aiming at overcoming shortcoming of " three-step" start method of the brushless DC motor (BLDCM) sensorless control, a dual-mode BLDCM controller was developed based on phase compensation technology by studying electric bicycle, using back electromotive force(back-EMF)detection method and improving the back-EMF detection circuit and position sensorless starting method. By using the technology , BLDCM can be run on position sensor mode and sensorless mode. When the position sensor signal output is normal, the motor is run on the position sensor mode in default; otherwise, when position sensor signal output is abnormal, the motor automatically switches to be run on the mode without position sensor. The experimental result proves that the detection circuit boasts high sensitivity and completely compensates the phase delay; two modes work steadily and the switching process is smooth.
Institute of Scientific and Technical Information of China (English)
王宝忠; 孙健涛; 要丹
2011-01-01
Exactly detecting of rotor position was required during the control of brushless DC motor, and back EMF detecting method was a simple, effective way to detect the position-sensorless rotor position of brushless DC motor. A back EMF detecting method based on the H_PWM-L_PWM modulation model by analyzing the freewheeling condition of a non-conducted phase of this model was raised. This back EMF detecting method needed not to detect the center voltage of the three-phase winding, and gained a two times of the back EMF of a non-conducted phase. The simulation under MATLAB software environment and experimental results showed that this method had good performance in low speed control of brushless DC motor.%无刷电机的控制需要准确检测到转子的位置,反电动势法是检测无位置传感器无刷直流电机转子位置的一种简单、有效的方法.采用二相导通星形三相六状态的控制模式,通过分析在H_PWM-L PWM调制方式下不导通相的续流情况,提出了基于该调制方式的反电动势检测方法.该反电动势检测法不需要检测三相绕组中点电压,所获得的是不导通相的两倍的反电动势.MATLAB仿真和试验结果证明,该检测方法具有良好的低速控制性能.
无刷直流电机与控制模块安规认证%Safety Certificate of Brushless DC Motor and its Control Module
Institute of Scientific and Technical Information of China (English)
Flex Wang
2008-01-01
@@ 1 串激式电机的应用与特性 串激式电机(Series Motorg)也称作电刷式电机(Conventional Motors),具备高扭力输出的特性,常常运用在毋需精确转速控制的电动工具中,例如手提式电钻、圆盘锯或是台式木工锯床、木工角度切割锯床等.在构造上使用机械式换相器(Commutator),将电源供应给电机转子绕组(Armature).
Institute of Scientific and Technical Information of China (English)
程文星; 祝长生
2012-01-01
针对某高速飞轮储能系统中的永磁无刷直流电机在宽速范围内运行时出现的电流和转矩脉动问题,开展了换向期间的转矩脉动的分析,建立了转矩脉动和转速之间的关系,提出了在低速区功率开关管采用先脉宽调制后恒通,最后再脉宽调制(PWM-onPWM)的方法,在高速区功率开关管采用了带PWM的重叠换向调制的一种混合调制方法；在抑制换向期间的电流和转矩脉动的效果上对该调制方式进行了评价,并搭建了Matlab/Simulink仿真模型,进行了低速区的运行试验.研究结果表明,该混合控制方案能消除非换向期间非导通相上的续流现象,并可减小换向过程中的电磁转矩脉动,可以使无刷直流电机在相对较宽的速度范围内平稳运行.%Aiming at reducing the current and the torque ripple appeared in flywheel energy storage system running in wide-range speed, after the analysis of torque ripple in the commutation interval, the relation between the torque ripple and the speed was established. A hybrid method was presented that the PWM-on-PWM was chosen to control power devices during low-speed range, while during high-speed range, the overlapping commutation with PWM was used. The control method were evaluated on the effect of reducing the current and the torque ripple during the commutation interval, the Matlab/Simulink model was built, and the running test in low-speed range were tested. Hie experimental results show that the proposed method can eliminate diodes' free-wheeling phenomenon and reduce the torque ripple during the commutation interval, it adapts for brushless DC motor in wide speed-range.
Institute of Scientific and Technical Information of China (English)
张庆超; 马瑞卿
2016-01-01
针对无刷直流电机转速伺服系统高性能非线性鲁棒控制，提出一种新型的多滑模反步高阶滑模非线性控制方法。在控制律设计的每一步都引入二阶滑模Super-Twisting算法，无需计算变量导数，消除了滑模抖振，并在第1级子系统虚拟控制律设计中提出一种改进的二阶滑模Super-Twisting算法。与传统双闭环PI控制相比，能够令系统的动静态性能更好，转矩脉动更小，鲁棒性更强；与标准Super-Twisting算法相比，进一步提高了系统对阶跃负载扰动的抑制能力。最后通过仿真分析表明了所提出方法的有效性。%For higher performance speed servo robustness control of brushless DC motor(BLDCM), a novel multiple sliding mode backstepping high order sliding mode nonlinear control approach is proposed. The second order sliding mode Super-Twisting algorithm(STA) ,which needs no derivative of any variables and eliminates the sliding mode chattering, is used in each step design of the whole backstepping control law. And a self-adaption STA(SSTA) is proposed and used in the virtual control law of the first level subsystem. Compared with the traditional dual closed loop PI control, the proposed method makes the system have higher dynamic and static performance, smaller torque ripple and stronger robustness. Compared with the traditional STA, the proposed SSTA can futher improve the system’s robustness for the step load disturbance. Finally, simulation analysis shows the effectiveness of the proposed method.
Strategy to Suppress Torque Ripple During Commutation of Brushless DC Motor%换相期间无刷直流电机转矩脉动的抑制策略
Institute of Scientific and Technical Information of China (English)
李怀兵; 丑武胜; 张延超
2011-01-01
Torque ripple was an important factor affecting the performance of brushless DC motor (BLDCM). The commutation torque ripple was analyzed, focusing on the torque ripple caused by non-ideal back EMF and the ascending speed of current in the upcoming phase and descending speed of current in the outgoing phase were not e-qual. The segment control strategy was proposed. The strategy which integrated the advantage of torque direct control and overlapping commutation method could effectively suppress the torque ripple caused by the two factors mentioned above. The simulation experiments showed the difference between the strategy and the two methods using alone, and prove the validity of the segment control strategy suppressing the torque ripple during commutation.%无刷直流电机的转矩脉动是影响其性能的重要因素.针对换相期间的转矩脉动进行了分析,重点研究了非理想反电势、关断相和开通相相电流变化速率不等这两个因素引起的转矩脉动,为了抑制这两个因素引起的转矩脉动,提出了分段控制的策略.该策略集成了转矩直接控制和重叠换相法的优点,可以有效抑制由非理想反电势、关断相和开通相相电流变化速率不等引起的转矩脉动.通过仿真分析验证了该方法和其中两种方法单独应用时的差异,证明了分段控制策略在换相期间抑制转矩脉动的有效性.
Institute of Scientific and Technical Information of China (English)
关学忠; 白云龙; 高哲
2014-01-01
Brushless DC motor speed servo system is multivariable ,nonlinear and strong coupling .Its performance is easily influenced by the parameter variation ,the cogging torque and the load disturbance .To solve the deficiency ,the paper presents the algorithm of active‐disturbance rejection control(ADRC) based on back‐propagation(BP) neural network .The ADRC is independent of accurate system and its extended‐state observer can estimate the disturbance of the system accurate‐ly .However ,the parameters of Nonlinear Feedback(NF) in ADRC are difficult to obtain .In this paper ,these parameters are self‐turned by the BP neural network .The simulation results indicate that the ADRC based on BP neural network can im‐prove the performances of the servo system in rapidity ,control accuracy ,adaptability and robustness .%无刷直流电机调速系统是多变量，非线性强耦合的非线性系统。它的齿槽转矩和负荷扰动性能很容易被参数的变化所影响。为了解决这个不足，论文将BP神经网络算法应用到自抗扰控制系统。自抗扰控制器是独立的精确的控制器，其扩张状态观测器可以准确地估计该系统的扰动。然而自抗扰控制器的非线性反馈参数是很难获得的，在文章中这些参数是来自BP神经网络。仿真结果表明，基于BP神经网络的自抗扰控制器能改善该伺服系统的快速性、控制精度适应性和鲁棒性。
Institute of Scientific and Technical Information of China (English)
连军强; 谢顺依; 王鼎
2011-01-01
在分析永磁无刷直流电机电磁转矩的基础上,以抑制电机转矩脉动为目标,提出了有限元与最小二乘支持向量机( LS-SVM)及粒子群优化算法相结合的永磁无刷直流电机设计方法,建立了永磁无刷直流电机有限元模型.经有限元计算分析,得到了极弧系数、永磁体厚度和气隙长度对电机转矩脉动的影响曲线,生成了LS-SVM训练样本,经训练得到了永磁无刷直流电机LS-SVM模型,通过有限元计算和LS-SVM模型拟合结果的比较,验证了模型的准确性.利用粒子群优化算法对永磁无刷直流电机LS-SVM模型进行优化,得到了极弧系数、永磁体厚度和气隙长度的最优参数,经有限元计算结果验证了优化的有效性.%In order to keep down torque ripple. The thesis analyzed the torque of permanent magnet brushless DC motor (PMBLDCM) and put forward a new method of finite element and least squares support vector machine ( LS-SVM) and partide swarm optimization ( PSO). A infinite element model of PMBLDC has been found. After the anylisis of model, the influence of pole embrace and thickness of PM and gas length on torque ripple. The training sample has been gained. The LS-SVM model of PMBLDCM found. After contrast of two results, the accuracy of model was verified. Then optimizing model of PMBLDCM LS-SVM was obtained. The optimizing parameter of PMBLDCM has been found, the validity of model was verified.
Institute of Scientific and Technical Information of China (English)
李劲松; 杨晓武; 李干蓉; 饶有祥
2012-01-01
从无刷直流电机转矩脉动产生的原理出发，分析了转矩脉动在非理想反电势情况下产生的原因，并提出通过提前角开通换相法与电流控制相结合的控制策略以减少电磁转矩脉动。仿真结果证明该控制策略能有效地控制由非理想反电势引起的无刷直流电机换向产生的电磁转矩脉动。% Based on the principle of torque ripple produced brushless DC motor,the article analyzes the reasons for torque ripple under non-ideal Back-EMF circumstance,and puts forward the control strategy that combines the advance angle opened commutation method with current controlling to reduce the electromagnetic torque ripple. The simulation results prove that the control strategy can work effectively to control the electromagnetic torque ripple which produced by brushless DC motor under non-ideal Back-EMF circumstance.
Electric Tools Permanent Magnet Brushless DC Motor Hall Sensor Selection%电动工具用永磁无刷直流电机的霍尔传感器选型
Institute of Scientific and Technical Information of China (English)
古炯钧; 徐威群
2014-01-01
基于不同工艺霍尔传感器的磁特性与电特性，就电动工具用无刷电机的应用特点，介绍所需霍尔传感器的必要参数，提出合理选型建议，以期达到提高电机整体性能与可靠性的目的，为工程师设计电机时选择霍尔传感器提供参考。%Based on the magnetic properties and electrical characteristics of different processes Hall sensor, and on the application characteristics of electric tools brushless motor, introduce the necessary parameters of Hall sensor, put forward reasonable selection suggestions, in order to improve the overall performance and reliability, and to provide a reference for the engineers choosing Hall sensor when designing the motors.
Electronically commutated dc motors for electric vehicles
Maslowski, E. A.
1981-01-01
A motor development program to explore the feasibility of electronically commutated dc motors (also known as brushless) for electric cars is described. Two different design concepts and a number of design variations based on these concepts are discussed. One design concept is based on a permanent magnet, medium speed, machine rated at 7000 to 9000 rpm, and powered via a transistor inverter power conditioner. The other concept is based on a permanent magnet, high speed, machine rated at 22,000 to 26,000 rpm, and powered via a thyristor inverter power conditioner. Test results are presented for a medium speed motor and a high speed motor each of which have been fabricated using samarium cobalt permanent magnet material.
Institute of Scientific and Technical Information of China (English)
诸自强
2008-01-01
The torque-speed characteristics of brushless motor having an interior permanent magnet rotor and a sinusoidalback-emf waveform are compared experimentally when it is operated in brushless AC (BLAC) mode and brushless DC(BLDC) modes with both 2-phase, 120° conduction (BLDC-120) and 3-phase,180° conduction (BLDC-180).Particularemphasis is on high-speed,six-step voltage controlled,flux-weakening operation.h is shown that for EV/HEV applications,even for interior PM brushless motors which have sinusoidal back-emf waveforms,in order to achieve maximum torque perampere capability over wide operation speed range,it is advantageous to employ a hybrid operation mode-BLAC operationin the constant torque region and six-step voltage control (BLDC-180 operation, together with current phase control) inthe flux-weakening region.
An ironless armature brushless torque motor
Studer, P. A.
1973-01-01
A high torque motor with improved servo mechanism is reported. Armature windings are cast into an epoxy cylinder and armature conductors are integrally cast with an aluminum mounting ring which provides thermal conductance directly into the structure. This configuration eliminates magnetic hysteresis because there is no relative motion between the rotating magnetic field and any stationary iron. The absence of destabilization forces provides a fast electrical response compared with a typical torquer of conventional construction.
Optimization of brushless direct current motor design using an intelligent technique.
Shabanian, Alireza; Tousiwas, Armin Amini Poustchi; Pourmandi, Massoud; Khormali, Aminollah; Ataei, Abdolhay
2015-07-01
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using an improved bee algorithm (IBA). The characteristics of the motor are expressed as functions of motor geometries. The objective function is a combination of losses, volume and cost to be minimized simultaneously. This method is based on the capability of swarm-based algorithms in finding the optimal solution. One sample case is used to illustrate the performance of the design approach and optimization technique. The IBA has a better performance and speed of convergence compared with bee algorithm (BA). Simulation results show that the proposed method has a very high/efficient performance. PMID:25841938
Institute of Scientific and Technical Information of China (English)
赵向阳; 葛文韬
2011-01-01
The dynamic eccentricity fault model was implemented and the inductance and flux were resolved based on the finite element method （FEA） on Ansoft/Maxwell. That the simplified fault frequency of monitoring induction motor dynamic eccentricity could be used on brushless DC motor （BLDC） was demonstrated by simulation. The system of brushless DC motor was simulated on Ansoft/Simplorer. In steady state, the Fast Fourier Transform （FFT） analysis was used on the stator current. The simulated model of detecting dynamic eccentricity based on the stator current signature analysis （MCSA） method was investigated and implemented： The frequency to indentify dynamic eccentricity fault, the amplitude of frequency to estimate the dynamic eccentricity severity. Furthermore, the effect of speed pulsation of BLDC operating under steady state was investigated in this article. The results indicate that the severity of dynamic eccentricity fault increase, the amplitude of fault frequency increase.%基于Ansoft／Maxwell设置动态偏心故障，建立求解电机电感和磁链的有限元模型，通过仿真，证明了将感应电机动态偏心故障的特征频率经过简化后，同样适用于无刷直流电动机。基于Ansoft／Simplorer建立无刷直流电动机系统的仿真模型。在电机稳态运行下，对定子电流进行傅里叶分析，研究并建立基于定子电流监测动态偏心故障的仿真模型：动态偏心故障与特征频率的关系、动态偏心故障程度与特征频率幅值的关系。进而研究了无刷直流电动机稳态运行时转速波动对偏心故障监测的影响。仿真结果表明，转子偏心程度加大，特征频率的幅值增加。
Brushless PM Motor Optimization using Bees Algorithm and Finite Element Analysis
Directory of Open Access Journals (Sweden)
Reza Ilka
2011-05-01
Full Text Available Brushless permanent magnet motors play an important role in many applications. Power density and efficiency are two important factors in designing such motors. This paper proposes a novel approach to design a brushless permanent magnet motor based on optimization of a combination of power density and efficiency. First of all, this paper presents the equation related to the design and dimensions of brushless permanent magnet motor. Then, an optimum design based on bees algorithm (BA with the purpose of increasing power density is presented. Finally, Simulation results of a 2-D finite element analysis have well validated the efficiency of the applied method.
Institute of Scientific and Technical Information of China (English)
姜志超; 廖勇
2011-01-01
When the precise commutation of brushless DC motor automatic control system was realized, the brushless DC motor could be running in the best performance. In this paper, the precise commutation, leading .commutation and delaying commutation of brushless DC motor with three-phase Y-connected windings was discussed. The relationship between line voltage difference and hall communication signal was analyzed and a new closed-loop compensation control method was presented. The compensation method used the difference of two line voltage as a semaphore and the asymmetric semaphore of line voltage bias as feedback signal. By this way the phase position deviation of hall commutation signal was corrected through the PI adjuster. The simulation and experimental results verify the effective of the proposed method.%无刷直流电机控制系统实现最佳换相可以使无刷直流电机发挥出最佳的性能.文章以无刷直流电机工作在三相星型六个状态模式为基础,详细分析了最佳换相、超前换相和滞后换相情况下线电压差值与霍尔换相信号相位之间的关系,据此提出一种补偿换相信号偏差的新型闭环控制方法.该补偿方法以两相线电压差作为信号量,前后两次换相时刻采集的非对称信号量偏差值作为反馈量,通过PI调节器达到补偿霍尔换相信号相位偏差的目的.仿真和实验证明该方法能够实时、有效地补偿换相信号的相位偏差.
Institute of Scientific and Technical Information of China (English)
FU Huinan; CHEN Dongsheng; ZHAO Yong; LIN Binquan
2008-01-01
A minitype precise spindle system which can machine precisely and stably in the process of diamond lapping and polishing is designed. In such minitype spindle system, the brushless DC spindle motor is used to drive the lapping finish table, which is built with fluid dynamic bearings. Some measures have been taken to make the lapping system dynamic balance, and a servo controller which can adjust the speed of motor from 1 200 r/min to 5 400 r/min is designed. Experiments show that the spindle system is reliable and stable for diamond polishing, and the detection results by atomic force microscope(AFM) show that the surfaces of diamond edge's Ra is 6.725 nm and whole diamond average Ra is 3.25 nm.
Institute of Scientific and Technical Information of China (English)
吴强; 熊浩; 孟光伟; 让余奇; 李槐树
2011-01-01
本文分析了的120°导通三相逆变器的SVPWM控制特性,提出了基于SVPWM控制和电流调节控制的无位置传感器的三相永磁无刷直流电机（BLDCM）的起动控制方法。在Matlab/Simlink环境下,建立了三相永磁BLDCM起动控制系统的仿真模型并进行了仿真。仿真结果表明该起动控制方法不但能有效控制起动电流大小,而且能改善BLDCM开环起动性能。%The paper analyses the SVPWM control schema of three-phase inverter employing 120° switch-on mode,proposes a starting control method combining the SVPWM control schema with current regulation for a sensorless three-phase permanent-magnet（PM） brushless DC（BLDC） motor,establishes the simulation model of the starting control system in Matlab /Simlink environment,and implements the proposed starting control system through digital simulation.Simulation results verify that the proposed starting method can not only control the starting current effectively but also improve the open-loop starting performance of the BLDC motor.
Institute of Scientific and Technical Information of China (English)
马洪雨; 帕孜来·马合木提; 李倩
2016-01-01
According to the controlling strategy of BLDCM, a brushless DC motorof electric motorcycle control system based on PIC16F737 microcontroller was designed, a detail ofhardware circuit andsoftware design methods were given, This system can realize regulation speed, speed limit and stationary speed and has perfect function of protection and assistance. Static and dynamic test of the control system were completed. Experiments show that the control system has a good performance , meet the requirements, the devise have definite practical value.%根据无刷直流电机的工作原理,设计了以PICl6F737单片机为核心的电动摩托车无刷直流电动机控制系统,给出了控制系统的硬件组成和软件设计方法,可以实现调速、限速、定速功能,保护及辅助功能完善.通过对控制系统的静态和动态调试表明系统性能良好,满足设计要求,具有广泛的现实意义.
The special brushless synchronous motors for oil field pumps
International Nuclear Information System (INIS)
Full text : This paper deals with : 1) Oil and gas industries mechanisms severe duties and main demands to their field quipment; 2) technical and economical substantiate of pumps induction motors (IM) replacement by eliable almost like IM special, brushless synchronous motor (SBSM) as energy saving, tability, reliability and even ecology improving arrangement; 3) a peculiar approach during the project and construction, work of the SBSM (with the simplest constant current exiting system) to get self-stabilizing effect cost under wide range cycling torque; 4) substantiate supporting oilfield experiments and computer-assisted electrodynamic (mechatronic) lab model's studies including IM and SBSM dynamic stability analyses in conditions of supply voltage wide fluctuations and extensive cyclic moment if the spare parts. The calculated SBSM production cost is equal to 130-150 percent of IM cost. After intensive lab studies and long-run field applications SBSM was recommended for industry to replace obsolete and old IM and to plan this type SBSM for new sucker-rod oil pumps (SRP), even if the real cost of the SBSM is double of the IM cost
Shen, J.X.; Zhu, Z Q; Howe, D
2004-01-01
The sensorless control of brushless machines by detecting the third harmonic back electromotive force is a relatively simple and potentially low-cost technique. However, its application has been reported only for brushless dc motors operating under normal commutation. In this paper, the utility of the method for the sensorless control of both brushless dc and ac motors, including operation in the flux-weakening mode, is demonstrated.
Rotor position sensing in brushless ac motors with self-shielding magnets using linear Hall sensors
Zhu, Z. Q.; Shi, Y. F.; Howe, D.
2006-04-01
This paper investigates the use of low cost linear Hall sensors for rotor position sensing in brushless ac motors equipped with self-shielding magnets, addresses practical issues, such as the influence of magnetic and mechanical tolerances, temperature variations, and the armature reaction field, and describes the performance which is achieved.
Institute of Scientific and Technical Information of China (English)
夏鲲; 朱琳玲; 曾彦能; 徐鑫悦; 杨益华
2015-01-01
Focusing on popular existed high commutation torque ripple of square waves driving brushless DC motors, this paper presented a new method of suppressing commutation torque ripple for brushless DC motors based on a Quasi-Z-Source net. The Quasi-Z-Source net was employed at the front of the three-phase bridge. The control strategy was to adjust the DC link voltage of the motor controller via the Quasi-Z-Source net to keep the incoming and outgoing phase currents changing at the same rate during commutation, hence to effectively suppress commutation torque ripple. The cause of commutation ripple was analyzed. A novel circuit topology and a control algorithm of suppressing commutation torque ripple employed a Quasi-Z-Source net before the inverter was introduced in detail. Finally, simulation and experimental results show that, the proposed method can effectively minimizing commutation torque ripple. Torque ripple can be reduced to below 4.6% of the average torque by using appropriate circuit parameters in a simulation mode. And torque ripple can also be reduced to below 12% of the average torque via experimentation in real situation.%针对方波驱动的无刷直流电机普遍存在的换相转矩脉动较大的问题，提出了一种基于准 Z 源网络抑制永磁无刷直流电机换相转矩脉动的方法。在三相桥臂前级增加准 Z源网络，换相期间由准 Z 源网络调整直流母线电压，使电机关断相电流下降速率与开通相电流上升速率相等，从而有效抑制换相转矩脉动。分析了换相转矩脉动产生的原因，详细介绍了通过增加前级功率变换电路抑制换相转矩脉动的电路拓扑与控制算法。仿真及实验结果表明，该方法能够有效抑制永磁无刷直流电机换相转矩脉动，如采用合适的电路参数，仿真模型中转矩脉动可减少到平均转矩的4.6%以下，实际设计的系统实验可将转矩脉动抑制在平均转矩的12%以下。
Energy Technology Data Exchange (ETDEWEB)
Muenchow, Frank [Federal-Mogul, Bad Camberg (Germany). Geschaeftsbereich Vehicle Safety and Protection; Harvey, Richard; Richards, Michael [Federal-Mogul Corporation, Logansport, IN (United States). Business Unit Vehicle Safety and Protection
2012-03-15
Electrifying components in commercial vehicles can be a challenge. High vibration levels, for instance, amplify carbon brush and commutator erosion in a conventional electric motor. To offer a solution Federal-Mogul has developed the brushless fuel pump. This BLDC pump has successfully passed 10,000 h of operation in B100 fuel. (orig.)
Sharkh, S.M.; Lai, S. H.
2009-01-01
This paper discusses the analysis and design of a very thin slotless PM brushless motor whose stator laminations are manufactured from a single strip of steel that is edge wound into a spiral (like a “Slinky”) and then fitted over the windings that are preformed on the outside surface of a non-conducting former. Analytical and finite element analysis (FEA) are used to determine the constrained optimum dimensions of a motor used to drive a rim driven thruster in which the motor rotor is fitted...
A novel left ventricular assist device with impeller pump and brushless motor compacted in one unit
Institute of Scientific and Technical Information of China (English)
无
2001-01-01
The impeller pump we developed has assisted the circulation of calves for two months, but further improvements to solve the problems of bearing wear and thrombosis along the bearing are desirable. Thus we have designed a new left ventricular assist device (LVAD) with impeller pump and brushless motor compacted in one unit, for which a ceramic bearing and a purge system through the bearing have been devised. The first experiments indicate that this new device could prospectively work for more than one year.
Directory of Open Access Journals (Sweden)
M. Antony Freeda Rani
2015-08-01
Full Text Available Permanent Magnet Brushless DC motor (PMBL DC is used in a large number of industrial and automotive applications because of their high efficiency, compactness and excellent reliability. However to design an efficient PMBL DC motor, it is necessary to provide an effective controller that has to reduce the overshoot, settling and rise time. In this study, an improved PID controller has been designed by optimizing the parameters of PID controller based on two advanced optimization techniques ANFIS and Cuckoo Search optimization for speed control of a PMBL DC motor. The proposed approach has superior features, including easy implementation, stable convergence characteristic and good computational efficiency. The PMBL DC motor is modeled in SIMULINK implementing the algorithms in MATLAB and the performance evaluation has been studied.
Institute of Scientific and Technical Information of China (English)
王法龙; 郑明辉
2015-01-01
针对常规PI在无刷电机调速中控制精度低及动态性能差，无法满足裁断机对动力辊电机速度控制要求，本文提出了一种自适应模糊PI控制方法。该方法应用于无刷直流电机双闭环控制的速度外环控制，提高了无刷直流电机的控制精度和动态响应性能。通过Matlab进行仿真，仿真结果表明，采用自适应模糊PI控制相对常规PI控制，无刷直流电机的调速系统具有很好的动态和静态性能，快速响应，超调量小，抗干扰能力强，鲁棒性好。%In the conventional PI control of brushless motor speed low precision and dynamic performance is poor, unable to meet the power roller cutting machine for motor speed control requirements, we propose an adaptive fuzzy PI control method. The method is applied to double-loop control of brushless DC motor speed outer control, improved control accuracy and dynamic response performance brushless DC motor. Through Matlab simulation results show that the adaptive fuzzy PI speed control system to control relative to conventional PI control, brushless DC motor has a good dynamic and static performance, fast response, small overshoot, and strong anti-jamming capability, robustness.
270 V高压无刷直流电动机速度闭环控制器%Speed Closed Loop Controller of 270 V High Voltage Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
马瑞卿; 侯红胜; 杨白明
2009-01-01
介绍了一种270 V航空高压无刷直流电动机(BLDCM)速度闭环控制器.充分利用BLDCM自身三相Hall传感器的转子位置信息,对三相Hall信号进行逻辑处理来实现倍频,进而提高了电机速度检测的分辨率.给出了高压DC/DC隔离控制电源、Hall信号倍频逻辑和AT89C51单片机等关键电路的设计方法.试验结果表明:电机具有较为平直的机械特性及较好的速度稳定度.
Institute of Scientific and Technical Information of China (English)
付朝阳; 刘景林; 金英汉
2012-01-01
In order to improve the reliability of the system, the redundancy technology is introduced into the design of permanent magnet BLDCM. Sections 1 through 3 of the full paper explain our design, computer simulation and experimental research; we believe that our design is effective. The core of section 1 consists of; (1) two kinds of stator structure are designed, including one slot and two slots; ( 2 ) the mathematical model of the motor is set up; the winding inductance is analyzed and calculated, and the relationship between the winding inductance and mutual inductance is deduced. The core of section 2 is that, according to the mathematical model, the parameters of the motor are designed and the rotational speed and torque are simulated. The core of section 3 consists of; (1) the motor is tested on the MAGTROL testing system; ( 2 ) the mechanical characteristic curves of both kinds of stator structure under different working modes are compared. The simulation results are given in Figs. 3 through 6 and the experimental results are given in Figs. 7 through 12. Both the simulation and the experiment results show that; (1) the motor of each kind can achieve good dynamic characteristics and the torque is increased by 100% with two sets of windings; ( 2) two sets of winding did not affect motor performance, but it did indeed greatly improve the system reliability.%为了提高系统可靠性,将余度技术引入到永磁无刷直流电机设计中.设计了2种定子绕组方式,包括同槽嵌放和隔槽嵌放结构.建立了2种结构下的数学模型,对绕组电感进行了分析计算,推导了绕组自感和互感之间的关系.根据数学模型,设计了双余度永磁无刷直流电机的具体结构参数,对转速和转矩进行了仿真.利用magtrol测试系统对双余度永磁无刷直流电机进行了实验,对比分析了2种结构不同工作模式下的机械特性曲线.实验结果表明:2种结构的双余度无刷直流电机在运行过程
PWM ZCS DC Motor Drive and DC Power Supply
Bardia Montazeri
2011-01-01
Following the extension and increase in capacity of power electronic elements, many convertors with special applications have been designed. Convertors such as rectifiers, AC and DC power supplies, AC and DC drivers and so on. At present, optimization of these convertors, decreasing loss and bringing down the electromagnetic interference are desired. In this paper, a DC to DC convertor for controlling the speed of DC motor is designed and one prototype is presented in which switching losses...
DSPIC BASED POWER ASSISTED STEERING USING BRUSHLESS DIRECT CURRENT MOTOR
Directory of Open Access Journals (Sweden)
G. R.P. Lakshmi
2013-01-01
Full Text Available This study illustrates the Electrically Assisted power Steering (EAS using BLDC motor for a vehicle. Earlier the Electrically Assisted power Steering (EAS was implemented with DSP. This study shows the usage of a dsPIC to control the BLDC motor with an encoder. The BLDC motor here is driven by dsPIC through a three phase inverter system. IRAMS type of inverter is used which is cost efficient and space efficient. The dsPIC supplied with the input of the steering. In its higher capacity the vehicles speed controller acts as the assistance level controller for steering effort. At the lower capacity, the torque controller gives the effort level control. In reality this can be realized as torque sensor and vehicle sensor interfaced in the dsPIC. For actual implementation in the system, a dsPIC-based BLDC motor controller with three-phase inverter module is used with Hall-effect sensor feedback. It is designed in such a way that the driver assistance can be varied at any time without any difficulty.
Analysis of DC output voltage ripple in an electromagnetic doubly salient brushless DC generator
Institute of Scientific and Technical Information of China (English)
WANG Li; YAN Yangguang; CAO Xiaoqing; MENG Xiaoli
2007-01-01
Considering the salient pole and high magnetic nonlinearity of the electromagnetic doubly salient (EMDS)DC generator,a 12/8 pole prototype EMDS generator is designed and calculated using a 2-D finite element method (FEM).The phenomenon is analyzed and that the phase voltage wave changes between 120°and 180°.The influence of the exciting current and armature reaction on the DC voltage ripple of the generator is discussed in detail.and the nonlinear rules are gained that DC voltage rippie changes accordingly.The theoretical analysis is verified by the simulation and expefimental results.The results are helpful for the optimal design of the generator and the optimal control of excitingwinding.We conelude mat the filter-capacitance of the rectifier can be designed.
A real-time observer for UAV's brushless motors
Koteich, Mohamad; Lemoing, Thierry; JANOT, Alexandre; Defaÿ, François
2013-01-01
Vector control has been widely used in control of permanent magnet synchronous motors (PMSM). This technique requires an accurate knowledge of the rotor position. In many applications, such as mini-UAV, it is not possible to install any mechanical sensor. Therefore, a sensorless technique using position observer has to be implemented in order to estimate the rotor position. In this paper, we propose a new observer for PMSM sensorless control: the position estimate is generated upon electromag...
A Novel Current Sensor Technique for Brushless DC Motor Drives
Institute of Scientific and Technical Information of China (English)
无
2000-01-01
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Permanent magnet synchronous and brushless DC motor drives
Ramu, Krishnan
2009-01-01
Presents an introduction to machines, power devices, inverters, and control. This book covers pm synchronous machines, including modeling, implementation, control strategies, flux weakening operations, parameter sensitivity, sensorless control, and intelligent control applications.
Design of Portable Garden Mowers Based on a Brushless Motor Control System%基于无刷电机控制系统的便携式园林割草机设计
Institute of Scientific and Technical Information of China (English)
段亚东
2012-01-01
Based on a thorough study of China＇s mower technologies,a simple and practical portable garden mower is designed.The mower uses a brushless motor and its technical performance parameters have improved substantially,compared with traditional brush motors.The mower uses the drive chip IR2130 dedicated for brushless DC motors as its control chip and uses power device MOSFET as its switch to realize the control of brushless DC motors.%在深入研究我国割草机技术的基础上,设计了简单实用的园林便携式割草机。该割草机采用无刷电动机,与传统有刷电动机相比,其主要技术性能大幅提升。以无刷直流电动机专用驱动芯片IR2130为控制芯片,以功率器件MOSFET为开关器件,可实现对无刷直流电动机的控制。
Pre-Optimization of Brushless PM Motor Design using Interval Arithmetic
Directory of Open Access Journals (Sweden)
GautamMoni Patro*, Venkata R Basam ,S. Sashidhar , , P. Mallikarjuna Rao
Full Text Available These days, the desperate need for energy, provoked the requirement of energy efficient and ergonomic electrical machines suitable for propulsion, wind power applications, etc. This forces a machine designer to their extreme limits in designing their customized machine suitable for their application. Thus, in this quest for energy efficient electrical machines, there came into existence many new design based theories. In this research work the authors sincerely attempt to identifyand segregate the Brushless PM motor design parametersfrom CAD point of view and apply the concept of Interval Arithmetic; so that a valid range(bounds of the design parameter(s can be determined and acknowledged before going into a suitable optimization technique for optimizing them. With the help of MATLAB®CLI the bounds for the motor design parameters can be determined in which the optimal design solution lies.
Development of Limited Angle Brushless Torque Motor Control Drive for Scan Mirror Mechanism
Directory of Open Access Journals (Sweden)
A. Jagadeeshwaran
2013-10-01
Full Text Available This paper illustrate the design and realization of control drive electronics of Limited Angle brushless torque motor for position control of Scan mirror mechanism. The scan mirror mechanism is controlled for the intended limited mechanical angle within +/- 20deg. The control drive is designed for six selectable positions within +/- 20deg with an accuracy of 0.75 degree. These six selectablepositions are achieved with rates of 1 deg/sec, 2 deg/sec and 3 deg/sec according to the requirement. The control input to the drive electronics is given through PC interface for the required position and rate. The input/output is presented in GUI front end. The instantaneous data of present position and rate of the scan mechanism is logged in PC for reference.
Energy Technology Data Exchange (ETDEWEB)
Luo, Shaohua [School of Automation, Chongqing University, Chongqing 400044 (China); Department of Mechanical Engineering, Chongqing Aerospace Polytechnic, Chongqing, 400021 (China); Wu, Songli [Department of Mechanical Engineering, Chongqing Aerospace Polytechnic, Chongqing, 400021 (China); Gao, Ruizhen [School of Automation, Chongqing University, Chongqing 400044 (China)
2015-07-15
This paper investigates chaos control for the brushless DC motor (BLDCM) system by adaptive dynamic surface approach based on neural network with the minimum weights. The BLDCM system contains parameter perturbation, chaotic behavior, and uncertainty. With the help of radial basis function (RBF) neural network to approximate the unknown nonlinear functions, the adaptive law is established to overcome uncertainty of the control gain. By introducing the RBF neural network and adaptive technology into the dynamic surface control design, a robust chaos control scheme is developed. It is proved that the proposed control approach can guarantee that all signals in the closed-loop system are globally uniformly bounded, and the tracking error converges to a small neighborhood of the origin. Simulation results are provided to show that the proposed approach works well in suppressing chaos and parameter perturbation.
Sharkh, S.M.; Lai, S. H.
2010-01-01
This paper discusses the analysis and design of a very thin slotless PM brushless motor whose stator laminations are manufactured from a single strip of steel that is edge wound into a spiral (like a “Slinky”) and then fitted over the windings that are preformed on the outside surface of a non-conducting former. Analytical and finite element analysis (FEA) are used to determine the constrained optimum dimensions of a motor used to drive a rim driven thruster in which the motor rotor is fitted...
Metamodels for New Designs of Outer-Rotor Brushless Synchronous Electric Motors
Dirba, J.; Lavrinovicha, L.
2014-04-01
The authors consider the possibilities to synthesise metamodels for the analysis and optimisation of brushless synchronous motors. The metamodels are presented for new designs of the outer-rotor permanent magnet synchronous motor and the outer-rotor reluctance motor. The metamodels are synthesised based on the results obtained by the numerical calculations of magnetic field taking into account magnetic saturation. Analysis of the results for the motor magnetic field and tests of the metamodels at the selected and intermediate points shows that these can be synthesised with acceptable accuracy using numerical calculations instead of expensive real experiments. Rakstā ir apskatītas metamodeļu iegūšanas iespējas to izmantošanai bezkontaktu sinhrono dzinēju analīzē un optimizācijā. Ir iegūti metamodeļi sinhronam dzinējam ar pastāvīgajiem magnētiem un reaktīvam dzinējam ar ārējo rotoru. Sintezēto metamodeļu iegūšanai izmantoti elektrisko dzinēju magnētiskā lauka skaitlisko aprēķinu rezultāti, ievērojot magnētiskās ķēdes piesātinājumu. Metamodeļu pārbaude aprēķinu un starppunktos parādīja, ka to iegūšanai dārgo reālo eksperimentu vietā var izmantot magnētiskā lauka aprēķinu rezultātus.
PWM ZCS DC Motor Drive and DC Power Supply
Directory of Open Access Journals (Sweden)
Bardia Montazeri
2011-01-01
Full Text Available Following the extension and increase in capacity of power electronic elements, many convertors with special applications have been designed. Convertors such as rectifiers, AC and DC power supplies, AC and DC drivers and so on. At present, optimization of these convertors, decreasing loss and bringing down the electromagnetic interference are desired. In this paper, a DC to DC convertor for controlling the speed of DC motor is designed and one prototype is presented in which switching losses is close to zero and it has a very low electromagnetic interference. In this convertor, the switches turn on and turn off approximately with zero current. The speed of motor is controlled by PWM. This plan includes advantages of PWM and resonant convertors.The disadvantages, such as ; high switching losses and changing switching frequency for controlling output were removed. As switching frequency has a direct relation with switching losses, when losses decreased, it is possible to increase the frequency, then volume and weight of passive filter elements can be decreased. Besides, by decreasing the losses , the need of heatsink , which is the heavy and voluminous elements of convertors, can be removed.
Optimization Design and Performance Analysis of a PM Brushless Rotor Claw Pole Motor with FEM
Directory of Open Access Journals (Sweden)
Zhenyang Zhang
2016-07-01
Full Text Available A new type of permanent magnet (PM brushless claw pole motor (CPM with soft magnetic composite (SMC core is designed and analyzed in this paper. The PMs are mounted on the claw pole surface, and the three-phase stator windings are fed by variable-frequency three-phase AC currents. The advantages of the proposed CPM are that the slip rings on the rotor are cast off and it can achieve the efficiency improvement and higher power density. The effects of the claw-pole structure parameters, the air-gap length, and the PM thinner parameter of the proposed CPM on the output torque are investigated by using three-dimensional time-stepping finite element method (3D TS-FEM. The optimal rotor structure of the proposed CPM is obtained by using the response surface methodology (RSM and the particle swarm optimization (PSO method and the comparison of full-load performances of the proposed CPM with different material cores (SMC and silicon steel is analyzed.
Series BK contactless DC motors
Energy Technology Data Exchange (ETDEWEB)
Buss, V.A.; Vevyurko, I.A.; Ivanov, G.V.; Kuzmin, V.N.; Mikhaylov, E.M.; Stoma, A.S.
1985-05-01
Implementation of principles described in a previous work has allowed development and introduction to series production of a motor series including 36 standard types and sizes. The series is designed to operate at a nominal voltage of 27 V and includes two main versions: the BK-1 for fans and BK-2 for pumps. The BK-2 motor differs from the BK-1 in that it has a thin sealed sleeve of high impedance nonmagnetic metal separating the rotor and stator cavities, allowing the rotor of the BK-2 to operate in the fluids or other media being pumped. Characteristics of the motors are presented. The BK-1316 has an operating life of about 50,000 hours at nominal speed of 6000 rpm. The experience of series production of the BK motors has shown the need for further improvement of the design and technology in order to decrease the number of metal cutting, winding and assembly operations required. The use of plastic structures is suggested to this end.
The Research of a novel Method for Brushless Motor Controller based on DSP%基于DSP的新颖无刷直流电机控制器设计
Institute of Scientific and Technical Information of China (English)
赵长青; 范蟠果
2008-01-01
利用DSP2812设计了一个无位置传感器电机控制系统,该系统利用三相四开关电路对无刷直流电机(Brushless DC Motor,简称BLDCM)进行驱动,采用了新颖的无位置传感器控制方法和脉宽调制(PWM)方法.最后通过分析和试验证明了该系统的可行性.
Design and Analysis on the Outer-rotor Permanent Magnet Brushless in-Wheel Motor%轮毂式永磁无刷直流电动机设计浅析
Institute of Scientific and Technical Information of China (English)
张晓宇
2013-01-01
Taking the DC outer-rotor permanent mag-net brushless motor as researching subject, design of the windings, proper selection of the slot/pole number and opti-mization of the magnetic materials were analyzed. The DC outer-rotor permanent magnet brushless motor was designed by means of the software of Maxwell 2D, working out the air-gap magnetic flux density, EMF waveform and elec-tromagnetic torque diagram. The results of finite element analysis not only veriifed rationality of the design but also provided a background to optimize the design of motors.%以外转子永磁无刷直流电机为研究对象，分析了绕组设计、槽极数合理选择和磁钢优化等。并应用Maxwell 2D软件，对轮毂式永磁无刷直流电机进行设计分析，给出了气隙磁密、反电势波形及电磁转矩图。有限元分析的结果不仅验证了电机设计的合理性，还为电机的优化设计提供了依据。
Comparative Study of Controller Design for Four Quadrant Operation of Three Phase BLDC Motor
Ms.K.Suganya*1
2014-01-01
Brushless DC motor drives are becoming more popular in industrial and traction applications. The control of BLDC motor in four quadrants is very vital. The three-phase permanent magnet brushless dc motor inherently needs an electronic commutation circuit to drive it, because it is not a self-commutating motor. It is contrary to the conventional brush motor which commutates itself. This paper presents a comparison study of three type of control such as PI, PID & fuzzy. The char...
Circuit design of DC brushless thruster speed measurement%直流无刷推进器转速测量电路设计
Institute of Scientific and Technical Information of China (English)
陈伟; 严卫生; 赵江
2012-01-01
Digital pulse noise,which comes from DC brushless thruster outputting,affects the DC brushless thruster speed measurement. This paper puts forward a DC brushless thruster speed measurement circuit design method. The circuit u-ses a voltage follower,photoelectric isolation technology,which can eliminate the digital pulse noise influence on measurement accuracy. And we calculate the propeller speed by using frequency to voltage converter and analog to digital converter. The test results indicate that the method can effectively eliminate the digital pulse noise. The method has a good stability and high speed measurement accuracy. It can well meet the requirements of DC brushless thruster speed measurement.%直流无刷推进器输出的数字脉冲信号存在毛刺干扰,影响对推进器转速的测量.提出一种直流无刷推进器去毛刺转速测量电路的设计方法.该电路采用电压跟随、光电隔离技术,消除数字脉冲毛刺干扰对测量精度的影响；通过F/V变换、A/D转换,由测得电压计算推进器转速.试验结果表明,该电路设计可以有效的去除毛刺干扰.该方法稳定性好、测速精度高,能很好的满足对直流无刷推进器转速测量的要求.
Institute of Scientific and Technical Information of China (English)
无
2007-01-01
This paper develops a unified methodology for a real-time speed control of brushless direct-current motor drive systems in the presence of measurement noise and load torque disturbance. First, the mathematical model and hardware structure of system is established. Next, an optimal state feed back controller using the Kalman filter state estimation technique is derived.This is followed by an adaptive control algorithm to compensate for the effects of noise and disturbance. Those two algorithms working together can provide a very-high-speed regulation and dynamic response over a wide range of operating conditions.Simulated responses are presented to highlight the effectiveness of the proposed control strategy.
Intelligent Controller for Networked DC Motor Control
B. Sharmila; N. Devarajan
2010-01-01
This paper focuses on the feasibility of Neural Network controller for Networked Control Systems. The Intelligent Controllers has been developed for controlling the speed of the Networked DC Motor by exploiting the features of Neural Networks and Fuzzy Logic Controllers. The major challenges in Networked Control Systems are the network induced delays and data packet losses in the closed loop. These challenges degrade the performance and destabilize the systems. The aim of the proposed Neural ...
Design of Brushless Motor Speed Control System Based on FPGA%基于FPGA的直流无刷电机调速系统的设计
Institute of Scientific and Technical Information of China (English)
郑自伟; 刘兴中
2011-01-01
The design method of brushless DC motor speed control system based on FPGA is introduced. The hardware, software and control method design of speed control system are discussed. The issue of measuring speed using Hall sensor is analyzed and a method of measuring speed of motor based on FPGA is presented. Experiment data shows advantages of the controller, such as high precision and good performance.%介绍基于FPGA芯片的直流无刷电机调速系统的设计方法,讨论了调速系统的硬件结构、软件结构及控制方法的设计及实现。对利用霍尔传感器信号进行测速的问题进行了分析,并给出一种结合FPGA特点的电机转速的解算方法。实验表明,该设计方法性能稳定,调速性能良好。
直流电机控制方法的Matlab仿真研究%Research on Matlab simulation for DC motor control method
Institute of Scientific and Technical Information of China (English)
徐莉
2016-01-01
The control method of brushless DC motor is studied deeply. According to the actual physical model of brushless DC motor,the corresponding mathematical model is established,in which the motor is controlled by double closed⁃loop scheme. On the basis of the real working characteristics of the motor,the conventional PID algorithm is replaced by the fuzzy adaptive PID algorithm to establish the speed control model,so the stability and anti⁃interference ability of the brushless DC motor speed control system can be improved. The simulation model of brushless DC motor was established by Matlab/Simulink toolbox. The re⁃search results show that the fuzzy adaptive PID algorithm can make the speed of the brushless DC motor stable,and the speed can recover to the setting speed quickly under load disturbance. The control system has perfect robustness.%针对无刷直流电机的控制方法进行了深入研究。根据无刷直流电机实际物理模型建立相应的数学模型，电机使用双闭环进行控制。根据电机的实际工作特点，使用模糊自适应PID算法替代常规PID算法建立速度控制模型，以提高无刷直流电机速度控制系统的稳定性和抗干扰能力。使用Matlab/Simulink工具箱建立无刷直流电机的仿真模型，研究结果表明，模糊自适应PID算法能够使无刷直流电机的速度更加平稳，在载荷扰动下快速恢复设定速度，使得控制系统具有更好的鲁棒性。
Electric motors for robotics; Moteurs electriques pour la robotique
Energy Technology Data Exchange (ETDEWEB)
Maye, P.
2000-07-01
This book presents the technology of DC motors, DC brush-less motors and step by step motors as used in robotics. It describes also the speed and positioning servo-systems with their electronic circuits, the overheating problems and the selection criteria for a given electric motor. (J.S.)
Speed Control of DC Motor using AC/AC/DC Converter Based on Intelligent Techniques
Directory of Open Access Journals (Sweden)
Rakan Kh Antar
2013-05-01
Full Text Available This paper describes the application of ac/ac/dc and ac/dc converters to control the speed of a separately excited DC motor. Artificial neural network and PI controller are trained to select the desired values of firing angles for triggering thyristors of the ac/ac/dc and ac/dc bridge converters in order to control the speed of the dc motor at a desired value with constant and different load torques in order to obtain the best speed response. Simulation results show that the rising time for ac/dc and ac/ac/dc converters at 250rpm are reduced about 79% and 89% respectively, while delay time it reduced about 69% and 64% respectively. Therefore, speed response of the dc motor is more efficient for closed loop system compared with open loop also the response of ac/ac/dc converter is better than ac/dc converter.
Advanced DC Motor Drive for Haptic Devices
Directory of Open Access Journals (Sweden)
Miroslav Božić
2012-06-01
Full Text Available Haptics covers many different forms of mechanical interaction with human senses by engaging, touch, vibrations and forces/torques, established for the purpose of augmenting the feedback structure during human-machine interaction. A haptic device has mechanical part, moved by actuators from one and human hand or fingers from the other, actuators, drives, sensing elements, as well as algorithms designed to control the interaction between human and machine in positioning and motion control tasks. With such a system, motors can be controlled in a way to simulate various environments, defined by their material and dynamics, for example pushing soft ball uphill. Haptic devices are becoming more popular in medical applications after introduction of modern medical robots with many different extensions for minimally invasive surgery or diagnostics based on palpation. This paper discusses one DC motor driver custom designed for the purpose of designing a haptic device for medical applications.
Speed Control of Bldc Motor Drive By Using Pid Controllers
Directory of Open Access Journals (Sweden)
Y.Narendra Kumar,
2014-04-01
Full Text Available This paper mainly deals with the Brushless DC (BLDC motor speed driving systems have sprouted in various small scale and large scale applications like automobile industries, domestic appliances etc. This leads to the development in Brushless DC motor (BLDCM. The usage of BLDC Motor enhances various performance factors ranging from higher efficiency, higher torque in low-speed range, high power density ,low maintenance and less noise than other motors. The BLDC Motor can act as an alternative for traditional motors like induction and switched reluctance motors. In this paper PID controller is implemented with speed feedback loop and it is observe that torque ripples are minimized. Simulation is carried out using MATLAB / SIMULINK. The results show that the performance of BLDC Motor is quite satisfactory for various loading conditions. Brushless DC motor drives are typically employed in speed controlled applications.
Bat algorithm optimized fuzzy PD based speed controller for brushless direct current motor
Directory of Open Access Journals (Sweden)
K. Premkumar
2016-06-01
Full Text Available In this paper, design of fuzzy proportional derivative controller and fuzzy proportional derivative integral controller for speed control of brushless direct current drive has been presented. Optimization of the above controllers design is carried out using nature inspired optimization algorithms such as particle swarm, cuckoo search, and bat algorithms. Time domain specifications such as overshoot, undershoot, settling time, recovery time, and steady state error and performance indices such as root mean squared error, integral of absolute error, integral of time multiplied absolute error and integral of squared error are measured and compared for the above controllers under different operating conditions such as varying set speed and load disturbance conditions. The precise investigation through simulation is performed using simulink toolbox. From the simulation test results, it is evident that bat optimized fuzzy proportional derivative controller has superior performance than the other controllers considered. Experimental test results have also been taken and analyzed for the optimal controller identified through simulation.
Voice-Based Control of a DC Servo Motor
Directory of Open Access Journals (Sweden)
Musaab Hassan
2012-01-01
Full Text Available Problem statement: Motors play a very important role in our life and among which is the DC servo motors. The techniques of controlling these DC motors are plenty, among which is sound. In this study, a voce-based technique was implemented to control the speed and the direction of rotation for a DC motor. Approach: A Microcontroller-based electronic control circuit was designed and implemented to achieve this goal. Results: The speed of the motor was controlled, in both directions, using pulse width modulation and a microcontroller was used to generate the right signal to be applied to the motor. Conclusion: The loudness of human voice was successfully divided into different levels where each level drives the motor at different speed."
Directory of Open Access Journals (Sweden)
Dr. Mehrdad Jafarboland
2014-11-01
Full Text Available Due to special working conditions and also the need for extend range of speed because of high maneuver power in different conditions, there uses DC motors in submarines. Double armature motor due to the ability to produce torque in extend range of speed as well as high confidentiality in comparison with regular DC motors has noticed considerably and has used as actuator system in submarines structures. In this paper, first we will survey a regular DC motor behavior in terms of working speed range and efficiency in different powers. Then, some properties of a double armature motor will be comparison with a same regular DC motor case from the aspect of working speed range and efficiency factors
DC drive system for cine/pulse cameras
Gerlach, R. H.; Sharpsteen, J. T.; Solheim, C. D.; Stoap, L. J.
1977-01-01
Camera-drive functions are separated mechanically into two groups which are driven by two separate dc brushless motors. First motor, a 90 deg stepper, drives rotating shutter; second electronically commutated motor drives claw and film transport. Shutter is made of one piece but has two openings for slow and fast exposures.
A New Method for Reducing Commutation Torque Ripples in BLDC Motors
Institute of Scientific and Technical Information of China (English)
无
2001-01-01
A new compensation method and an algorithm for compensating for the commutation torque ripples of the trapezoidal EMF brushless DC motor are put forward. Simulation and experimental results show that this method is correct and practical.
Brushless DC servo drive system design%无刷直流伺服驱动系统设计
Institute of Scientific and Technical Information of China (English)
陈玄
2012-01-01
This article through to the digital dc servo drive system theory of research on the control strategy of the analysis and application of the system of high response and high precision. Starting from the first permanent magnet dc motor of the mathematical model of dynamic mathematical model is set up, consider all sorts of interference and parameters change, the corresponding control strategy to apply to the motor control, understand the inner structure servo drive, the best control strategy, make the performance of the system to achieve the expected goal. The fuzzy adaptive control system, write PID algorithm and optimized the speed of the stability and precision control. MATLAB software based on the servo system model, and the simulation PID algorithm of the motor speed control%本文通过对全数字直流伺服驱动系统的理论研究，进行控制策略的分析与应用，实现系统的高响应和高精度。首先从永磁直流电机的数学模型出发，建立动态数学模型，考虑各种干扰及参数变化，把相应的控制策略运用到电机控制，了解伺服驱动的内在结构，研究最佳控制策略，使系统的性能达到预期目标。研究模糊自适应控制系统，编写了PID改进算法，优化了对转速的稳定、精确控制。用MATLAB软件建立伺服系统模型，并仿真PID改进算法对电机转速的控制。
PID controller simulator software for DC motor of gamma scanning
International Nuclear Information System (INIS)
Mostly PID controller (Proportional-Integral-Derivative) has been used in industry. For certain applications, it can be used as a Proportional (P) model only, or as a Proportional-Integral (PI) model. The aim of this paper is to design a PID controller simulator software for DC motor which is used in gamma scanning system. A DC motor is described as a plant of SISO (Single Input Single Output) which is used for pulling down the load (detector + casing) and gamma radiation source (Co-60 + container) by using sling cable. A DC motor consist of an armature and a rotor, the equivalent circuit of DC motor is shown in a transfer function equation between output parameter (angular speed DC motor) and input parameter (voltage of DC motor). Methods used for the process of PID controller design is to arrange the PID controller parameter (Kc, Ti, Td) so that there are more PID controller transfer function model which are able to control angular speed of DC motor in stable condition, as design criteria requirement is needed. Design criteria requirement for control system are the settling time < 3 second, overshoot < 5%, rise time = 0.25 second, steady state gain = 1 and peak time < 3 second with step response reference 1 rad/second. The result of simulation gives several models of PID controller in function transfer equation which is similar with design criteria requirement in a equation of function transfer of order 2 for numerator and order 1 for denominator. (author)
Virtual test system for permanent-magnet DC motor
Institute of Scientific and Technical Information of China (English)
崔淑梅; 王悦; 柴凤; 吴红星; 刘宝廷; 程树康
2003-01-01
In order to obtain the primary parameters and operating characteristics of a DC motor without directlymeasuring its torque and rational speed, it is proposed to use a PC and a data acquisition card to acquire boththe dynamic and static data of armature current to establish the performance of a DC permanent-magnet motor.The accuracy and validity of this virtual test system proposed were verified by comparing the measurements madewith the system proposed with the measurements made with conventional torque meters. It is concluded from theresults of comparison that from the mathematic model established for the DC permant-magnet motors, both majorparameters and operating characteristics can be directly established for the DC motors without measuring theirtorques and rotational speed, a perfect on-line measurement and test system has been established for the DCpermanent-magnet motors using the theory of virtual test system. The system proposed features shorter test time,higher efficiency and lower cost.
Study and development of test-bed for brushless DC hub-motor used in EV%纯电动汽车用直流无刷轮毂电机试验台架的研究与开发
Institute of Scientific and Technical Information of China (English)
董铸荣; 梁松峰; 田超贺
2012-01-01
为解决应用于纯电动汽车上的轮毂电机测试和试验的问题,将虚拟仪器技术应用于轮毂电机性能测试与再生制动试验台的设计中.开展了试验台组成结构、测控系统工作原理的分析,设计了测控系统电路,推导了电机转速、电机扭矩、电流、电压的测量计算公式,提出了电机再生制动试验方法及试验数据的计算公式；在此基础上采用LabVIEW开发了测控系统软件,并进行了实际运行实验.实验结果证明,该试验台设计较为合理,能够将电机的性能测试试验与再生制动试验合二为一,满足了电动汽车轮毂电机相关研究的需求.%In order to solve the problems of performance testing and regenerative braking experiment for hub-motor of electric vehicle (EV), the virtual instrument technology was applied to design the test—bed for hub-motor of EV. After the analysis of the composition of the test-bed and the theory of constitution of the observer and control system, the peripheral circuit was designed. Computational formula for motor rev, motor torque, electric current, electric tension was deduced. The method of regenerative braking experiment and computational formula was presented. On this basis, LabVIEW was presented to develop software for the observer and control system. The experimental data results show that the design of the test-bed is reasonable. Hub-motor performance test and motor regenerative braking test are realized on this test-bed. It can meet the demand of experiments of hub-motor of EV.
Brushless Starting Magneto for Motor Cycle%摩托车用无刷起动磁电机
Institute of Scientific and Technical Information of China (English)
任立环; 刘迎澍; 李家国
2001-01-01
In view of the problems of difficult maintenance and short usage life ,etc.existed in previous magneto and electric generating started by carbon-brush and commutator device,a brushless starting magneto for motor cycle is introduced in this paper, it integrates the functions of starting, generating and igniting,uses the electronic inverter instead of mechanic inverter to overcome a series of problems caused by the electric brush and the commutator. The structures of magneto and inverter and the features of ignition system are described in this paper in detail.%针对早期的起动磁电机起动及发电均通过碳刷整流子装置，存在维护困难、使用寿命短等问题。介绍了一种摩托车用无刷起动磁电机，它集起动、发电与点火功能于一体，并采用电子换向器替代机械换向装置，从而克服了由电刷和整流子所带来的一系列问题。详细介绍了其电机结构、电子换向器结构及点火系统的特点。
Investigation of a New Flux-Modulated Permanent Magnet Brushless Motor for EVs
Directory of Open Access Journals (Sweden)
Ying Fan
2014-01-01
Full Text Available This paper presents a flux-modulated direct drive (FMDD motor. The key is to integrate the magnetic gear with the PM motor while removing the gear inner-rotor. Hence, the proposed FMDD motor can achieve the low-speed high-torque output and high-speed compact design requirements as well as high-torque density with a simple structure. The output power equation is analytically derived. By using finite element analysis (FEA, the static characteristics of the proposed motor are obtained. Based on these characteristics, the system mathematical model can be established. Hence, the evaluation of system performances is conducted by computer simulation using the Matlab/Simulink. A prototype is designed and built for experimentation. Experimental results are given to verify the theoretical analysis and simulation.
An energy-saving fan with brushless motor design%一款节能风扇用无刷电机的设计
Institute of Scientific and Technical Information of China (English)
唐雷
2013-01-01
National efforts to promote "energy saving" today, fans still widespread use of low-efficiency low-power single-phase induction motors. This design features selected with efficient three-phase brushless motor, replace the single phase capacitor induction motor, under controlled conditions in terms of cost, the design of three-phase brushless motor efficiency dramatically. Will promote the use of good social benefits .%国家大力提倡“节能减排”的今天，电风扇仍然普遍使用低效率的小功率单相感应电机。本设计选取具备高效特性的三相无刷电机，取代单相电容感应电机，在成本可控的条件下，所设计的三相无刷电机，效率得到大幅提升。推广使用将获得良好的社会效益。
Institute of Scientific and Technical Information of China (English)
李节宝; 章跃进
2011-01-01
Torque ripple suppression was the research focus of permanent magnet brushless motor, domestic and foreign experts and scholars had proposed lots of solutions for the problem. First analysis the compositions of permanent magnet brushless motor torque ripple and various reasons which casue the torque ripple, then the commonly use methods of reducing permanent magnet brushless motor pulsating ripple was summarized and introduced.%抑制转矩脉动是永磁无刷电机研究重点,国内外专家学者提出了诸多解决方法.在分析永磁无刷电机脉动转矩的组成及产生原因的基础上,综合介绍了削弱永磁无刷电动机转矩脉动常用的一些方法.
Directory of Open Access Journals (Sweden)
A.S. Oshaba
2013-05-01
Full Text Available This study presents an approach for the speed control of a permanent magnet DC motor drive via Pulse Width Modulation (PWM technique and a DC/DC converter. The Particle Swarm Optimization (PSO technique is used to minimize a time domain objective function and obtain the optimal controller parameters. The performance of the proposed technique has been evaluated using various types of disturbances including load torque variations. Simulation results illustrate clearly the robustness of the controller and validity of the design technique for controlling the speed of permanent magnet motors.
Aplicació docent d'autòmats programables al posicionament d'eixos mitjançant motor brushless
López López, Fernando
2004-01-01
Premi al millor Projecte de Fi de Carrera presentat durant el curs 2003-2004 en l'àmbit de Mecatrònica que atorga TECNOTRANS L’objectiu del present projecte, és la fabricació d’una maqueta amb finalitat docent, que exposi el funcionament d’un sistema de posicionament d’eixos compost per un motor brushless, resolver, variador de velocitat i autòmat programable amb mòdul controlador d’eixos. Per aconseguir això, s’ha muntat un eix de desplaçament lineal d’un metre de longitud, al ...
DC Motor Parameter Identification Using Speed Step Responses
Directory of Open Access Journals (Sweden)
Wei Wu
2012-01-01
Full Text Available Based on the DC motor speed response measurement under a step voltage input, important motor parameters such as the electrical time constant, the mechanical time constant, and the friction can be estimated. A power series expansion of the motor speed response is presented, whose coefficients are related to the motor parameters. These coefficients can be easily computed using existing curve fitting methods. Experimental results are presented to demonstrate the application of this approach. In these experiments, the approach was readily implemented and gave more accurate estimates than conventional methods.
Institute of Scientific and Technical Information of China (English)
骆光照; 张围围; 杨南方; 马鹏; 刘卫国
2012-01-01
A flux linkage compensation field oriented control (FOC) method was proposed to suppress the speed and torque ripples of a hrusbless wound-fleld synchronous motor in its starting process. The starting process was analyzed and the model of wound-field synchronous electric machine was established. The change of field current of the electric machine was described mathematically for simplified exciter and rotate rectifier. Based on the traditional field control, the flux linkage compensation was introduced in d-axis current to counteract the flux ripple. Some simulation and preliminary experiments were implemented. The results show that the proposed method is feasible and effective.
Advanced dc motor controller for battery-powered electric vehicles
Belsterling, C. A.
1981-01-01
A motor generation set is connected to run from the dc source and generate a voltage in the traction motor armature circuit that normally opposes the source voltage. The functional feasibility of the concept is demonstrated with tests on a Proof of Principle System. An analog computer simulation is developed, validated with the results of the tests, applied to predict the performance of a full scale Functional Model dc Controller. The results indicate high efficiencies over wide operating ranges and exceptional recovery of regenerated energy. The new machine integrates both motor and generator on a single two bearing shaft. The control strategy produces a controlled bidirectional plus or minus 48 volts dc output from the generator permitting full control of a 96 volt dc traction motor from a 48 volt battery, was designed to control a 20 hp traction motor. The controller weighs 63.5 kg (140 lb.) and has a peak efficiency of 90% in random driving modes and 96% during the SAE J 227a/D driving cycle.
基于DSC的无刷直流风机控制系统%Control system for brushless DC fan based on DSC
Institute of Scientific and Technical Information of China (English)
徐交建; 吴建华
2011-01-01
Aiming at improving the efficiency and the speed regulating characteristic of fans used in factories, mines and cars, a control system of brushless DC fan based on dsPIC30F4012 which was made by microchip company was investigated and implemented. Hardware system with high reliability was firstly elaborated. Then, the software and the control algorithm were introduced. The system was evaluated by experiments and some conclusions were given. Experiment results show that the system has fine speed regulation performance and high reliability.%为提高厂矿及汽车空调用调速风机的运行效率和调速性能,研究了以Microchip公司的数字信号控制器(DSC) dsPIC30F4012芯片为核心的无刷直流风机控制系统.首先结合风机的使用环境,采用了高可靠性的硬件系统,并对硬件各个部分进行了阐述;然后介绍了系统所使用的控制算法和软件;最后通过实验对整个系统进行了评估并得出一些结论.实验结果证明,该系统能获得良好的调速性能和较高的可靠性.
Efficiency Characteristics of Low Power Hybrid Switched Reluctance Motor
DEFF Research Database (Denmark)
Jakobsen, Uffe; Ahn, Jin-Woo
2009-01-01
Switched reluctance motors (SRM) are usually considered inferior in terms of efficiency as compared to permanent magnet synchronous motors (PMSM) and brushless DC-motors (BLDC), but less costly. This article presents a test of a 70W hybrid switched reluctance motor (HSRM), that archieves a peak...... efficiency for the motor drive of more than 74%, and an efficiency for the motor of almost 80%....
Development of patent technology for brushless doubly fed motor%无刷双馈电机专利技术发展
Institute of Scientific and Technical Information of China (English)
张颖超
2015-01-01
近年来，作为可再生能源的风力发电受到了全球范围的广泛关注，人们越来越重视适用于风力发电的新型电机，无刷双馈电机以其简单的结构，高可靠性，具有异步和同步电机两种电机的综合特点，通过控制激磁绕组的电压和频率易于实现变速恒压恒频发电，是一种适合风力发电运行环境的新型电机。本文主要以DWPI、SIPOABS专利数据库以及CNTXT数据库中的检索结果为分析样本，从专利文献的视角对无刷双馈电机的发展进行了全面的统计分析，总结了与无刷双馈电机相关的国内和国外专利的申请趋势、主要申请人分布以及其转子结构的发展路线做了一定的分析，并从中得到一定的规律。%In recent years,wind power as the renewable energy by widespread concern in the global scope, people pay more and more attention to applicable to wind power as a new kind of motor, brushless doubly fed machine with its simple structure,high reliability,with the comprehensive characteristic of asynchronous and synchronous motor,two kinds of motor,by controlling the voltage and frequency of the excitation winding is easy to realize the variable speed constant frequency and constant voltage power,is a suitable for wind power generation operating environment as a new kind of motor.This paper mainly to DWPI,SIPOABS patent database and CNTXT database retrieval results for the analysis of the sample,from the patent literature from the perspective of the development of brushless doubly fed machine were comprehensive statistical analysis,summarized and brushless doubly fed machine related domestic and foreign patent application trend, mainly distributed in the applicant and the rotor structure of the development route do some analysis, and the obtained certain rules.
Estimation of Nonlinear DC-Motor Models Using a Sensitivity Approach
DEFF Research Database (Denmark)
Knudsen, Morten; Jensen, J.G.
1995-01-01
A nonlinear model structure for a permanent magnet DC-motor, appropriate for simulation and controller design, is developed.......A nonlinear model structure for a permanent magnet DC-motor, appropriate for simulation and controller design, is developed....
Institute of Scientific and Technical Information of China (English)
樊贝; 薛冰
2012-01-01
为适应大功率风机和泵类负载的调速性能,提出无刷双馈电动机的技术方案,并利用Matlab/Simulink建立无刷双馈电动机的一般模型进行动态仿真。仿真结果显示,无刷双馈电动机在单馈异步运行状态下,具有良好的异步电动机的启动运行特性。在双馈同步运行状态下,具有普通同步电动机转速特性,为进一步深入研究无刷双馈电动机的控制策略提供了参考。重点介绍无刷双馈电动机的结构特点和工作原理。%In order to adapt the speed regulation performance of big power blower and pump loading,the brushless doubly-fed motor＇s technology proposals are given out.And the dynamic simulation of brushless doubly-fed motor model is setted up based on Matlab/Simulink.The simulation results show that the brushless doubly-fed motor has good features of asynchronous motor starts and operates features under the states of single-fed asynchronous operation.It also has common synchronous motor speed features under doubly-fed synchronous operation state.These results provide reference for futher study on brushless doubly-fed motor＇s control strategy.And the structure features and working principle of brushless doubly-fed motor are introduced.
Directory of Open Access Journals (Sweden)
Zulkarnain Lubis
2009-01-01
Full Text Available Problem statement: With emphasis on a cleaner environment and efficient operation, vehicles today rely more and more heavily on electrical power generation for success. Approach: Mathematical modeling the components of the HEV as the three phase induction motor couple to DC motor in hybrid electric vehicle was introduced. The controller of Induction Motor (IM was designed based on input-output feedback linearization technique. It allowed greater electrical generation capacity and the fuel economy and emissions benefits of hybrid electric automotive propulsion. Results: A typical series hybrid electric vehicle was modeled and investigated. Conclusion: Various tests, such as acceleration traversing ramp and fuel consumption and emission were performed on the proposed model of 3 phase induction motor coupler DC motor in electric hybrid vehicles drive.
Research of Zero-Crossing Detection for Sensorless Brushless DC Based on DSC%基于DSC的无刷直流电动机过零检测方法
Institute of Scientific and Technical Information of China (English)
朱乐乐; 王宜怀; 胡玉鑫; 王浩
2013-01-01
The key technology of sensorless brushless DC motor control is zero-crossing detection. Based on full research and analysis of the hack-EMF motor principle,wave and traditional detection methods,a new method of back-EMF zero-crossing detection was introduced. The method did not rigidly adhere to the principles of traditional back-EMF zero-crossing detection, and the motor midpoint, depth filter and voltage comparison circuits in the design of the traditional zero-crossing detection circuit were rejected. The commutation points were received by realizing three-phase voltage real time collection,filtering and designing the effective software algorithms. The method was applied in the electric car control system. The experiment result shows that the method has some advantages which are simple zero-crossing detection circuits, software with clear structure and good real-time and so on.%无位置传感器无刷直流电动机的过零检测是该类型电机控制的关键技术.在充分研究与分析该类电机的反电动势原理、波形及传统检测方法的基础上,提出了一种反电动势过零检测新方法.该方法不拘泥于传统反电动势过零检测原理,摈弃了传统过零检测电路设计中的电机中点、深度滤波及电压比较等电路,利用DSC实现三相端电压动态实时采集、滤波,并设计有效的软件算法,得到换相点.实际应用结果表明,该过零检测电路具有实现简洁、软件结构清晰及实时性好等优点.
Institute of Scientific and Technical Information of China (English)
张宏喜
2011-01-01
The paper first introduced the commonly used starting methods of winding motor and its main shortcomings and then the principles and structural character, main performance and typical application effect of brushless automatic control soft starter are introduced. At last, the advantages of brushless motor automatic control soft starter are discussed and the necessity of replacing other types of motor starting device.%本文先简要介绍绕线电机常用的起动方法和存在的主要缺点,后介绍无刷自控电机软起动器的原理、结构特点、主要性能及典型应用效果,说明无刷自控电机软起动器的优势和代替其它电机起动装置的必然性.
Forward and Reverse Motoring of DC Hoist Motor on Container Crane (CC Operation
Directory of Open Access Journals (Sweden)
Rukmini
2015-03-01
Full Text Available Container cranes (CC become the highest electric energy consumption equipment in container terminal. Therefore it is important to study and analyze the hoist motor as the largest motor on container crane operation to look for opportunities in use energy efficiently. Lifting and lowering the container as the fixed operation of CC. Lifting the container as forward operating of hoist motor and lowering the container as reverse operating of hoist motor. The type of DC motor have used to modelling. Simulink (one of Matlab toolboxes was used to model the forward and reverse of DC hoist motor. When lifting the container (forward motoring, the current required depends on the applied load torque. But when lowering the containers (reverse motoring, the voltage generated by the engine polarity reverse is determined by the downward movement of containers (mass and height. Reverse the polarity, and let the motor functions as a generator, produces a current and then the potential energy was calculated. Conclusions were drawn at the end of the paper.
高速永磁无刷电机设计与控制系统研究%High-speed permanent magnet motor design and control system of brushless
Institute of Scientific and Technical Information of China (English)
郑睿鹏
2015-01-01
永磁无刷电机具有结构简单、无励磁损耗、效率高等特点，适合高速场合。目前，高速永磁无刷电机已经在一些电动汽车中得到实际应用，并且在分布式发电供电系统中显示了其价值和重要性。通过对高速永磁无刷电机设计的关键性问题的探讨、对高速永磁无刷电机控制系统的研究得出，高速电机的转速非常高，而且其功率的密度非常大，其几何尺寸小于其输出功率相同的低速电机，这些特征使得它在工业领域受到了广泛的关注和应用。%Permanent magnet brushless motor has a simple structure , no excitation loss, high efficiency, suitable for high speed applications. Currently, high-speed permanent magnet brushless motor has been applied in a number of electric vehicles, and has demonstrated its value and importance in distributed power generation and distribution systems. By discussing the key issues of high-speed permanent magnet brushless motor design, the study of high-speed permanent magnet brushless motor control system derived, high-speed motor speed is very high, and its power density is very large, and its geometry is less than its the same output power low-speed motor, these features make it in the industrial sector has been widespread concern and applications.
基于DSP控制的纯电动汽车无刷直流电动机%Brushless Direct Current Motor Based on DSP Control on Pure Electric Vehicle
Institute of Scientific and Technical Information of China (English)
吴敏
2011-01-01
无刷直流电动机是一种高性能的电动机，它具有结构简单、运行可靠、维护方便、运行效率高、无励磁损耗、运行成本低和调速性能好等优点，因此，它在电动汽车上的应用与日俱增．对无刷直流电动机控制的优化是人们一直期待解决的问题。文章设计了利用TMS320LF2407DSP控制器构成的无刷直流电动机的无位置传感器控制的系统硬件和系统软件，实现了对无位置传感器无刷直流电动机的优化控制，试验证明了该方法的正确性和有效性。%Brushless direct current motor is a type of motor with high performance and many advantages, including simple structure, reliable operation, convenient maintenance, high efficiency, non-excitation loss, low cost and good performance of speed governing. Therefore, its application on electric vehicles has increased. People have been looking forward to the solution to the optimization of the control of brushless direct current motor. This paper designs the eontrolling system＇s hardware and software for no-position sensor on the brushless current motor with the structure of TMS320LF2407 DSP controller, which optimized the brushless current motor with no-position sensor. The test also proves the correctness and effectiveness of this method.
Signal differentiation in position tracking control of dc motors
International Nuclear Information System (INIS)
An asymptotic differentiation approach with respect to time is used for on-line estimation of velocity and acceleration signals in controlled dc motors. The attractive feature of this differentiator of signals is that it does not require any system mathematical model, which allows its use in engineering systems that require the signal differentiation for its control, identification, fault detection, among other applications. Moreover, it is shown that the differentiation approach can be applied for output signals showing a chaotic behavior. In addition a differential flatness control scheme with additional integral compensation of the output error is proposed for tracking tasks of position reference trajectories for direct current electric motors using angular position measurements only
Research on DSP-based Asynchronous Motor Control Technology
Directory of Open Access Journals (Sweden)
Jun Yao
2013-05-01
Full Text Available The Motor in a variety of electrical transmission and position servo system occupies an extremely important position. After the DSP technology being applied to the motor control, the unification of the hardware and the flexibility of the software can be combined. Take the brushless DC motor for example, studied the mathematical model and the structure of the motor control system, also obtained the design scheme of the DSP-based asynchronous motor control system. With TI's 32 bit fixed point DSPTMS320F2812 as the core design of the hardware system, we wrote the system software, debug the motor control system and the results show that the system achieves the expected effect. The results of the research can be applied to brushless DC motor and other motor control, it will have a wide application prospects.
Sensorless Passivity Based Control of a DC Motor
Directory of Open Access Journals (Sweden)
M.Seethamathavi
2015-02-01
Full Text Available In last couple of decades, the control of motors has increased drastically. With this increase, current control techniques are developed. In sensor-less passivity control of a DC Motor the term passivity means the property of stability in an input and output. To maintain the stability at the input side the solar pv panel is connected with MPPT which extract maximum and stable voltage. For output we simultaneously regulate, both, the output voltage of the SEPIC-converter to a value larger than the solar panel output voltage, and the speed of motor, in any of the turning senses, so that it tracks a prespecified constant reference. For a sensor less current control of a PMDC motor, its small-signal model that contains a number of parasitic parameters the observed current may diverge due to the parasitic resistors and the forward conduction voltage of the diode. Moreover, the divergence of the observed current will cause steady state errors in the output voltage a self-correction differential current observer (SDCO is proposed to eliminate this steady-state error and gain high transient response speed. By carrying out a series of MATLAB simulation verifications, further investigation proves that the proposed algorithm has good robustness.
Application of DSP in Motor Control System%DSP在电机控制系统中的应用
Institute of Scientific and Technical Information of China (English)
周崐; 黄友桥; 曹晨
2011-01-01
Taking brushless DC motor and TMS320LF2407 for example,this paper introduces the application of DSP in motor control system.It gives software and hardware design of brushless DC motor control system based on DSP%本文以无刷直流电机和TMS320LF2407为例,介绍了DSP在电机控制系统中的应用,给出了基于DSP的无刷直流电机控制系统的软硬件设计。
Study on the Reliability of the Brushless PM Motor Based on Bayes Theory%基于Bayes理论的永磁无刷电机的可靠性研究
Institute of Scientific and Technical Information of China (English)
何银光; 胡小东; 常荣胜
2012-01-01
为了能够提高永磁无刷电机的可靠性评估水平,利用Bayes理论对其进行了可靠性评估.文中首先给出了Bayes理论的基本概念,然后建立了Weibull分布下永磁无刷电机的Bayes理论模型；最后,基于上述模型设计了永磁无刷电机的可靠性试验,根据截尾试验获得的可靠性数据对永磁无刷电机可靠性参数进行了估计.分析结果表明利用Bayes理论采用较少的样本就能获得充分的可靠度的参数估计值,具有较好的前瞻性.%In order to improve the reliability evaluation level of the brushless PM motor, and the Bayes theory is applied to have reliability evaluation of it. First, the basic conceptions of the Bayes theory is analyzed, and then the Bayes theory model of the brushless PM motor of WeibuII distribution is studied, and finally the reliability test of the brushless PM motor is designed, and the reliable pnrnmrtcr of the brushless PM notor is evaluated according to the reliable data obtained from the censored lifetime data test, and results show that this method can get the adequate parameter evaluation value of reliability, this method has better estimation character.
Energy Technology Data Exchange (ETDEWEB)
Widyan, M.S.
2010-07-01
Photovoltaic (PV) cells for powering direct current (DC) motors are designed to provide maximum output power at the rated conditions of the motors. This paper presented the dynamic and steady-state characteristics of DC shunt, series and permanent-magnet motors fed by PV cells via a DC-DC buck-boost (step up-step down) switch mode converter. It considered the nonlinearities of the output characteristics of the PV cells and that of the magnetization curve of the machines. In order to address the problem of voltage regulation of the PV cells and the variation in solar illumination, the duty cycle controls the output voltage of the DC-DC converter to maintain a fixed voltage across the terminals of the motors at any realistic loading conditions. In this study, the DC-DC buck-boost switch mode converter achieved a fixed voltage across the terminals of the motors and therefore good speed regulation under a wide range of loading conditions and solar intensities. The entire study was carried out using the Matrix Laboratory Program MATLAB{sup TM} software.
Bravin, E; Sosa, A
2014-01-01
This report summarizes the results of a series of tests performed on the prototype HIE-ISOLDE diagnostic box (HIE-DB) regarding the vibrations and drifts in the transverse position of the scanning blade while moving in and out of beam path in the HIE-ISOLDE short box prototype. To monitor the transverse position of the blade, a series of 0.1 mm diameter holes were drilled on it and their positions were tracked with an optical system. The linear motion actuator was acquired from UHV design (model LSM38-150-SS), and it was adapted to be driven by a brushless EC motor from MAXON. The speed of the scanning blade during the tests was 10 mm/s. The transverse movement of the slit in the direction perpendicular to the movement was lower than 40 m, and is dominated by the displacement of the contact point of the applied force on the lead-screw. An offset on the slit position was observed while changing the direction of movement of the blade, its amplitude being of the order of 30 m. The amplitudes of the displacements...
Hybrid I-f starting and observer-based Ssnsorless control of single-phase BLDC-PM motor drives
DEFF Research Database (Denmark)
Iepure, Liviu Ioan; Boldea, Ion; Blaabjerg, Frede
2012-01-01
A motion sensorless control for single-phase permanent magnet brushless dc motor based on an I-f starting sequence and a real-time permanent magnet flux estimation is proposed here. The special calculation for extracting the position and speed used here implies the generating of an orthogonal flux......-speed blower-motor (40 W, 10 krpm, 12 Vdc)....
Dual-mode operation of DC-excited memory motors under flux regulation
Yu, C.; Chau, KT
2011-01-01
The concept of memory is due to the fact that the magnetization level of permanent magnets (PMs) in the motor can be easily regulated by a temporary dc current pulse and then be memorized automatically. By incorporating this concept into the hybrid-field doubly salient PM (DSPM) motor, the resulting dc-excited memory motor can offer effective and efficient air-gap flux control. The purpose of this paper is to newly propose and implement dual-mode operation for the dc-excited memory motor. Nam...
Institute of Scientific and Technical Information of China (English)
张爽; 邹建华
2015-01-01
Taking TZYW/TAW 7 800-18/3 250 W THF1 positively pressurized enclosure/safety-increasing type synchronous motor with brushless excitation, which was used to equipped with a compressor from abroad, as an example, the advantages in the fields of explosion-proof of the positively pressurized enclosure/safety-increasing type synchronous motor with brushless excitation was described while key points in designing of the synchronous motor with single-supporting was introduced as well as the supe-riorities resulted from the comparison with the same kind motor.%以一台为国外压缩机配套的TZYW/TAW 7800-18/3250 WTHF1正压外壳/增安型无刷励磁同步电动机为例，叙述了正压外壳/增安型无刷励磁同步电动机的防爆优越性，介绍了单支撑同步电机的设计关键点，以及与同类电机相比后该类电机的优势。
Appelbaum, J.; Singer, S.
1989-01-01
A calculation of the starting torque ratio of permanent magnet, series, and shunt-excited dc motors powered by solar cell arrays is presented for two cases, i.e., with and without a maximum-power-point tracker (MPPT). Defining motor torque magnification by the ratio of the motor torque with an MPPT to the motor torque without an MPPT, a magnification of 3 for the permanent magnet motor and a magnification of 7 for both the series and shunt motors are obtained. The study also shows that all motor types are less sensitive to solar insolation variation in systems including MPPTs as compared to systems without MPPTs.
Online Performance Optimization of a DC Motor Driving a Variable Pitch Propeller
Cohen, Raphael; Miculescu, David; Reilley, Kevin; Pakmehr, Mehrdad; Feron, Eric
2013-01-01
A practical online optimization scheme is developed for performance optimization of an electrical aircraft propulsion system. The goal is to minimize the power extraction of the propulsion system for any given thrust value. The online optimizer computes the optimum pitch angle of a variable pitch propeller by minimizing the power of the system for a command thrust value. This algorithm is tested on a DC motor driving a variable pitch propeller; the experimental hardware setup of the DC motor ...
Voltage Tracking of a DC-DC Flyback Converter Using Neural Network Control
Directory of Open Access Journals (Sweden)
Wahyu Mulyo Utomo
2012-01-01
Full Text Available This paper proposes a neural network control scheme of a DC-DC Flyback converter that will step up a 12V DC and applied it on brushless DC motor with 12 and 24V dc. In this technique, a back propagation learning algorithm is derived. The controller is designed to track the output voltage of the DC-DC converter and to improve performance of the Flyback converter during transient operations. Furthermore, to investigate the effectiveness of the proposed controller, some operations such as starting-up and reference voltage variations are verified. The numerical simulation results show that the proposed controller has a better performance compare to the conventional PI-Controller method.
Steady-state time-periodic finite element analysis of a brushless DC motor drive considering motion
Directory of Open Access Journals (Sweden)
Jagieła Mariusz
2015-09-01
Full Text Available This paper aims at providing a framework for comprehensive steady-state time-domain analysis of rotating machines considering motion. The steady-state waveforms of electromagnetic and circuit quantities are computed via iterative solution of the nonlinear field-circuit-and-motion problem with constraints of time periodicity. The cases with forced speed and forced load torque are considered. A comparison of execution times with a conventional time-stepping transient model is carried out for two different machines. The numerical stability of a time-periodic model with forced speed is shown to be worse than that of traditional transient time-stepping one, although the model converges within a reasonable number of iterations. This is not the case if forced load via equation of mechanical balance is accounted for. To ensure convergence of the iterative process the physical equation of motion is replaced by the fixed-point equation. In this way the model delivers time-periodic solutions regarding not only the electromagnetic quantities but also the rotational speed.
Motion Sensorless Control of BLDC PM Motor with Offline FEM Info Assisted State Observer
DEFF Research Database (Denmark)
Stirban, Alin; Boldea, Ion; Andreescu, Gheorghe-Daniel;
2010-01-01
This paper describes a new offline FEM assisted position and speed observer, for brushless dc (BLDC) PM motor drive sensorless control, based on the line-to-line PM flux linkage estimation. The zero-crossing of the line-to-line PM flux linkage occurs right in the middle of two commutation points,...
Optimization of Consumed Power in Two Different DC Motors Coupled Based on Genetic Algorithm
Directory of Open Access Journals (Sweden)
Mehrdad Jafarboland
2011-01-01
Full Text Available A single DC motor can be substituted by two different couple DC motors in submarines. By this way, by varying the speed of submarine, the power of propellant and subsequently the mechanical power of these motors would vary. One important promlem in controlling the mechanical coupling of these motors is the power sharing between them. In the previous reports the mechanical power was shared between them in nonoptimized manner. In this paper an optimized cantroller is indroduced that optimize the efficiency of the system. The power sharing between these motors would vary according to their speed. The proposed controller is based on Genetic Algoritm and is able to share the mechanical power between the motors in an optimized manner at different speeds. The simutation results shows the well behavior of system and also the optimize power sharing.
Electric motors for robotics; Moteurs electriques pour la robotique
Energy Technology Data Exchange (ETDEWEB)
Maye, P.
2001-07-01
Thanks to the recent progresses made in the domain of small motors and of their electronic control systems, the electrical actuators have become preponderant among the actuators used in robotics and automation. This book presents the knowledge necessary to deal with the domain of electric actuators. The three main types of motors encountered today are described with their characteristics: DC motors, brush-less DC motors and step-by-step motors. The mechanisms and their influence on the choice of a motor, the speed and position servo-controls and the overheating phenomena are detailed. An important part is devoted to the electronic circuits, responsible for a large part of the performances of actuators. Content: general considerations; principle and technology of DC motors; operation regimes; electronic power supplies; brush-less DC motors and their power supplies; step-by-step motors and their power supplies; servomechanisms; motors overheating; measurement of motors parameters; speed and position control; appendixes; dictionary, bibliography, index. (J.S.)
Noise Source Identification of Small Fan-BLDC Motor System for Refrigerators
Chang-Joon Kim; Bo-Suk Yang; Yong-Han Kim
2006-01-01
Noise levels in household appliances are increasingly attracting attention from manufacturers and customers. Legislation is becoming more severe on acceptable noise levels and low noise is a major marketing point for many products. The latest trend in the refrigerator manufacturing industry is to use brushless DC (BLDC) motors instead of induction motors in order to reduce energy consumption and noise radiation. However, cogging torque from BLDC motor is an undesirable effect that prevent...
DC Motor Load Analysis and Cooling Consideration to Optimise the Power Consumption- Case Study
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Mr. K.G. Bante
2013-06-01
Full Text Available The need of energy conservation is the increased requirement of all industries as the cost of the energy increasing day by day. DC motors have been the workhorse of variable speed drives in the continuous steel rolling mills for many years. DC motors in the steel rolling mills are usually separately ventilated by providing air blower, heat exchanger and water. Cooling air is circulated inside the motor by air blower. Water circulates through the heat exchanger and cools the air. Energy consumption by the air blower plays a vital role in optimizing the energy consumption. This article indicates that the loading pattern of the DC motor should decide the control strategy for effective and efficient cooling arrangement.
STATE SPACE MODELING AND SIMULATION OF SENSORLESS PERMANENT MAGNET BLDC MOTOR
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N. MURUGANANTHAM
2010-10-01
Full Text Available Brushless DC (BLDC motor simulation can be simply implemented with the required control scheme using specialized simulink built-in tools and block sets such as simpower systems toolbox. But it requires powerful processor requirements, large random access memory and long simulation time. To overcome these drawbacks this paper presents a state space modeling, simulation and control of permanent magnet brushless DC motor. By reading the instantaneous position of the rotor as an output, different variables of the motor can be controlled without the need of any external sensors or position detection techniques. Simulink is utilized with the assistance of MATLAB to give a very flexible and reliable simulation. With state space model representation, the motor performance can be analyzed for variation of motor parameters.
Analysis of an AC-DC full-controlled converter supplying two DC-Series-Motor loads
International Nuclear Information System (INIS)
Phase-controlled converters are widely used because these converters are simple, less expensive, reliable, and do not require any communication circuit. Series motors are extensively used in many applications that require both high starting torque and essentially constant horse power. This paper is concerned with the detailed study of the performance characteristics of an AC-DC full-controlled converter supplying two DC-series-motor loads. The converter loads combination is simulated on a digital computer. Different modes of operation (continuous and discontinuous converter currents) are considered. The critical firing angle at which the mode of operation changes from one mode to another is deduced. The performance characteristics such input power factor, supply current distortion factor, supply current fundamental power factor, torque speed, and motor current ripple factor have been derived and studied for both constant firing angle and constant load factor have been derived and studied for both constant firing angle and constant load power of one motor. Waveforms for each load current and converter current are investigated for different modes of operation. (author)
Ruchita Patel; Hemant Amhia
2013-01-01
Residential and commercial appliances such as refrigerators and air conditioning systems have been using conventional motor drive technology. The machines in these applications typically have low efficiencies and high maintenance. Development of advanced motor drives has yielded increases in efficiency and reliability. A Brushless DC (BLDC) drives are known for higher efficiency, lower maintenance and higher cost. In this paper presents a proposed method for speed control of BLDC motor using ...
Graphical User Interface Aided Online Fault Diagnosis of Electric Motor - DC motor case study
Directory of Open Access Journals (Sweden)
POSTALCIOGLU OZGEN, S.
2009-10-01
Full Text Available This paper contains graphical user interface (GUI aided online fault diagnosis for DC motor. The aim of the research is to prevent system faults. Online fault diagnosis has been studied. Design of fault diagnosis has two main levels: Level 1 comprises a traditional control loop; Level 2 contains knowledge based fault diagnosis. Fault diagnosis technique contains feature extraction module, feature cluster module and fault decision module. Wavelet analysis has been used for the feature extraction module. For the feature cluster module, fuzzy cluster has been applied. Faults effects are examined on the system using statistical analysis. In this study Fault Diagnosis technique obtains fault detection, identification and halting the system. In the meantime graphical user interface (GUI is opened when fault is detected. GUI shows the measurement value, fault time and fault type. This property gives some information about the system to the personnel. As seen from the simulation results, faults can be detected and identified as soon as fault appears. In summary, if the system has a fault diagnosis structure, system dangerous situations can be avoided.
Neuro-Fuzzy DC Motor Speed Control Using Particle Swarm Optimization
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Boumediene ALLAOUA
2009-12-01
Full Text Available This paper presents an application of Adaptive Neuro-Fuzzy Inference System (ANFIS control for DC motor speed optimized with swarm collective intelligence. First, the controller is designed according to Fuzzy rules such that the systems are fundamentally robust. Secondly, an adaptive Neuro-Fuzzy controller of the DC motor speed is then designed and simulated; the ANFIS has the advantage of expert knowledge of the Fuzzy inference system and the learning capability of neural networks. Finally, the ANFIS is optimized by Swarm Intelligence. Digital simulation results demonstrate that the deigned ANFIS-Swarm speed controller realize a good dynamic behavior of the DC motor, a perfect speed tracking with no overshoot, give better performance and high robustness than those obtained by the ANFIS alone.
Research of Compound Control for DC Motor System Based on Global Sliding Mode Disturbance Observer
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He Zhang
2014-01-01
Full Text Available Aiming at the problems of modeling errors, parameter variations, and load moment disturbances in DC motor control system, one global sliding mode disturbance observer (GSMDO is proposed based on the global sliding mode (GSM control theory. The output of GSMDO is used as the disturbance compensation in control system, which can improve the robust performance of DC motor control system. Based on the designed GSMDO in inner loop, one compound controller, composed of a feedback controller and a feedforward controller, is proposed in order to realize the position tracking of DC motor system. The gains of feedback controller are obtained by means of linear quadratic regulator (LQR optimal control theory. Simulation results present that the proposed control scheme possesses better tracking properties and stronger robustness against modeling errors, parameter variations, and friction moment disturbances. Moreover, its structure is simple; therefore it is easy to be implemented in engineering.
Sensorless Load Torque Estimation and Passivity Based Control of Buck Converter Fed DC Motor
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S. Ganesh Kumar
2015-01-01
Full Text Available Passivity based control of DC motor in sensorless configuration is proposed in this paper. Exact tracking error dynamics passive output feedback control is used for stabilizing the speed of Buck converter fed DC motor under various load torques such as constant type, fan type, propeller type, and unknown load torques. Under load conditions, sensorless online algebraic approach is proposed, and it is compared with sensorless reduced order observer approach. The former produces better response in estimating the load torque. Sensitivity analysis is also performed to select the appropriate control variables. Simulation and experimental results fully confirm the superiority of the proposed approach suggested in this paper.
Efficiency of particle swarm optimization applied on fuzzy logic DC motor speed control
Directory of Open Access Journals (Sweden)
Allaoua Boumediene
2008-01-01
Full Text Available This paper presents the application of Fuzzy Logic for DC motor speed control using Particle Swarm Optimization (PSO. Firstly, the controller designed according to Fuzzy Logic rules is such that the systems are fundamentally robust. Secondly, the Fuzzy Logic controller (FLC used earlier was optimized with PSO so as to obtain optimal adjustment of the membership functions only. Finally, the FLC is completely optimized by Swarm Intelligence Algorithms. Digital simulation results demonstrate that in comparison with the FLC the designed FLC-PSO speed controller obtains better dynamic behavior and superior performance of the DC motor, as well as perfect speed tracking with no overshoot.
Incorporation of fractional-order dynamics into an existing PI/PID DC motor control loop.
Tepljakov, Aleksei; Gonzalez, Emmanuel A; Petlenkov, Eduard; Belikov, Juri; Monje, Concepción A; Petráš, Ivo
2016-01-01
The problem of changing the dynamics of an existing DC motor control system without the need of making internal changes is considered in the paper. In particular, this paper presents a method for incorporating fractional-order dynamics in an existing DC motor control system with internal PI or PID controller, through the addition of an external controller into the system and by tapping its original input and output signals. Experimental results based on the control of a real test plant from MATLAB/Simulink environment are presented, indicating the validity of the proposed approach.
DC Motor Speed and Position Control System Connects Directly to Microcomputer Chips
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Albert Zsolt Barabas
2011-06-01
Full Text Available The papers presents a high performance speed and position control system for separately-excited D.C. motor, which was designed and performed with a dedicated integrated circuits (L290, L291, L292, made by SGS-THOMSON Microelectronics Company. The L290, L291 and L292 together form a complete microprocessorcontrolled (microcomputer chips DC motor servo positioning system that is both fast and accurate with an adequate software . The papers presents a description of the system, detailed function descriptions of each device and application information.
WZR无刷自控电机软起动器在球磨机上的应用%The Application of WZR Brushless Automatic Motor Soft Starter in Ball Mill
Institute of Scientific and Technical Information of China (English)
樊晓栋
2013-01-01
分析了现有球磨机的电机起动方式所存在的问题，通过对球磨机运用无刷自控电机软起动器，实现了绕线式电动机无刷运行，彻底根除了电机因使用滑环、碳刷所造成的故障率高的缺点，改造后的电机及控制系统具有减小起动电流，增大起动转矩，自动适应电源及负载的变化，降低能耗，大大减少维修费用等优点。% Based on analyzing the problems in the motor starting methods of current ball bills, this paper applies WZR brushless automatic control motor soft starter in ball mills. The winding asynchronous motor runs without brush, overcoming the high fault rate due to ring and carbon brush use. The adapted motor and control systems have the advantages of starting current reduction, starting torque adding, automatic power and load change adjustment, energy reduction and maintenance budget reduction.
Controlling the Dc-link Midpoint Potential in a Six-phase Motor-drive
DEFF Research Database (Denmark)
Bendixen, Flemming Buus; Blaabjerg, Frede; Rasmussen, Peter Omand;
2004-01-01
inverter branch and filter inductances is needed for stabilizing the midpoint potential of the series connected dc-capacitor link. A new control strategy that pre-calculates the allowed voltage ripple and controls the motor voltage accordingly (using two standard three phase inverter modules) is suggested......Traditionally electrical motors have three phases, but multiphase motors have shown to improve motor performance and efficiency. This paper concentrates about the control algorithm for a six-phase induction motor with third harmonic current injection. The problem is that typically a seventh....... With this new control strategy the seventh branch and an inductance can be saved. It also opens the possibility to use two standard three-phase inverters to supply the six-phase motor. An experimental setup is build and the theory is verified in the test case. The proposed control strategy works satisfactory...
Institute of Scientific and Technical Information of China (English)
劳基声
2014-01-01
同步发电机带整流负载后，三相电枢绕组电流将出现谐波分量，其大小、成分与负载状况和整流器的型式子相关。相对其他电枢反应来说，构建旋转整流器式无刷交、直流发电机谐波电枢反应，能够在客观上提升发电质量，进一步满足电力运行需求。为了保证电力方面的工作能够更好地被执行，让电力需求得到较好的供应，需要在构建过程中注意相关因素的影响。%After the synchronous generator with rectifier load, three-phase armature winding current harmonics will occur, the size, composition and load conditions associated with the sub-type rectifier. Compared to other armature reaction, the construction of the rotary Brushless AC and DC generator harmonic armature reaction, can improve power quality in the objective to further meet the needs of electricity to run. In order to ensure better working electricity can be executed, so that the power supply needs to get better, you need to pay attention to the relevant factors in the build process.
Imitation of the characteristics of the wind turbine based on DC motor
Institute of Scientific and Technical Information of China (English)
LIU Qihui; HE Yikang; ZHAO Rende
2007-01-01
This paper analyzed the operating principles and power and torque characteristics of the wind turbine and the direct current motor(DC motor),and investigated the operating characteristics of the wind turbine compared to that of the DC motor.The torque imitation scheme,which has good performance and high feasibility,together with the whole wind turbine imitation system,was provided.The wind turbine imitation system includes not only a hardware platform composed of PC,data-collection board and thyristor-based velocity-regulator,but also monitor software of wind turbine imitation.The experimental results of different occasions verify the correctness and feasibility of the wind turbine imitation scheme proposed in this paper,which provided a valid idea for wind turbine imitation and investigation of wind power generation techniques in the laboratory.
Brushed permanent magnet DC MLC motor operation in an external magnetic field
International Nuclear Information System (INIS)
Purpose: Linac-MR systems for real-time image-guided radiotherapy will utilize the multileaf collimators (MLCs) to perform conformal radiotherapy and tumor tracking. The MLCs would be exposed to the external fringe magnetic fields of the linac-MR hybrid systems. Therefore, an experimental investigation of the effect of an external magnetic field on the brushed permanent magnet DC motors used in some MLC systems was performed. Methods: The changes in motor speed and current were measured for varying external magnetic field strengths up to 2000 G generated by an EEV electromagnet. These changes in motor characteristics were measured for three orientations of the motor in the external magnetic field, mimicking changes in motor orientations due to installation and/or collimator rotations. In addition, the functionality of the associated magnetic motor encoder was tested. The tested motors are used with the Varian 120 leaf Millennium MLC (Maxon Motor half leaf and full leaf motors) and the Varian 52 leaf MKII MLC (MicroMo Electronics leaf motor) including a carriage motor (MicroMo Electronics). Results: In most cases, the magnetic encoder of the motors failed prior to any damage to the gearbox or the permanent magnet motor itself. This sets an upper limit of the external magnetic field strength on the motor function. The measured limits of the external magnetic fields were found to vary by the motor type. The leaf motor used with a Varian 52 leaf MKII MLC system tolerated up to 450±10 G. The carriage motor tolerated up to 2000±10 G field. The motors used with the Varian 120 leaf Millennium MLC system were found to tolerate a maximum of 600±10 G. Conclusions: The current Varian MLC system motors can be used for real-time image-guided radiotherapy coupled to a linac-MR system, provided the fringe magnetic fields at their locations are below the determined tolerance levels. With the fringe magnetic fields of linac-MR systems expected to be larger than the tolerance
Identification of the parameters of a DC motor state space model
Directory of Open Access Journals (Sweden)
Momir Ranislav Stanković
2013-06-01
Full Text Available A method for the identification of the DC state space model parameters based on the minimization of the error function using the least squares method is described in this paper. The algorithm is practically applied in the laboratory environment on an industrial DC motor. The verification of the results was performed by comparing the characteristic signals of real and modeled systems. The results show that the quality of the identification is satisfactory. Introduction The identification of system parameters is the first step in the analysis and synthesis of control systems. Identification Quality strongly impacts on the results of all other computations. In the theory of automatic control, many methods of identification are developed. Which method will be applied depends on the characteristics of the system. In this paper, we described an identification algorithm based on the least squares method. A practical test of this algorithm of estimation is done on a DC motor. parameter estimation with the least squares method A DC motor is a second-order system described with two differential equations: one which describes electrical and one which describes mechanical parts of the motor. The idea is to analyse the motor as two first-order systems. The main signals are responses of two first order sub-systems on appropriate inputs. Using a discrete state-space model of the motor and applying the least square method on the recorded signals, we get straightforward equations for the computation of all the necessary parameters: Rr, Lr , Je , Fe , Kme and Kem (Eykhoff, Wilsoons, 1974. Experimental results The practical application was realized in the laboratory where a DC middle-power motor was used as a control object. It is coupled with a DC generator which serves as a load. Generation of the input signals and measure of the responses were performed with the acquisition system based on the appropriate acquisition card and the MATLAB
International Nuclear Information System (INIS)
Photovoltaic (PV) powered directly coupled electro-mechanical system has wide applications (e.g. PV powered cooling fans in green houses, PV water pumping system, solar vehicles). The objective of this work is to analyse the operation of directly PV powered DC PM (direct current permanent magnet) motor – propeller system for selection of motor parameters. The performance of such system mainly depends on the incident solar radiation, operating cell temperature, DC motor and propeller load parameters. It is observed that the operating points of the PV DC PM motor – propeller system matches very closely with the maximum power points (MPPs) of the PV array, if the DC PM motor – propeller parameters have been properly selected. It is found that for a specific application of such type of system, matching of torque–speed operating points with respect to the maximum power points of PV array are very important. It is ascertained through results that the DC PM motor's armature resistance, magnetic field constant, starting current to overcome the starting torque and torque coefficient are the main parameters. In designing a PV powered DC PM motor for a specific application, selection of these parameters are important for maximum utilization of the PV array output. The results of this system are useful for designing of directly PV powered DC PM motor's for aerodynamic applications. - Highlights: • We analyse the performance of directly PV powered DC PM motor – propeller system. • We examine PV electro-mechanical system for selection of DC motor parameters. • Matching of torque–speed curve to maximum power points of PV array is important
A low-cost viscometer based on a permanent magnet dc motor
International Nuclear Information System (INIS)
This paper proposes a pragmatic approach to, and a feasibility study of, a very low cost instrument for on-line and in situ viscosity measurement for engineering applications. It is a simple rotational instrument based on the mixer technique. It utilizes a permanent magnet dc (PMDC) motor which drives a propeller immersed in the test fluid. The viscosity is derived from the motor current when the motor is connected to a fixed supply voltage. The theory which relates PMDC motor current to the resistance to the rotational movement of a body due to the viscosity of the liquid under the test is developed. It is believed that the system provides the basis for a new generation of inexpensive viscometers for process and storage environments. (paper)
Adaptive Quasi-Sliding Mode Control for Permanent Magnet DC Motor
Directory of Open Access Journals (Sweden)
Fredy E. Hoyos
2013-01-01
Full Text Available The motor speed of a buck power converter and DC motor coupled system is controlled by means of a quasi-sliding scheme. The fixed point inducting control technique and the zero average dynamics strategy are used in the controller design. To estimate the load and friction torques an online estimator, computed by the least mean squares method, is used. The control scheme is tested in a rapid control prototyping system which is based on digital signal processing for a dSPACE platform. The closed loop system exhibits adequate performance, and experimental and simulation results match.
Modelling of a Serial Wound DC Motor Supplied by a Semi-Controlled Rectifier
Directory of Open Access Journals (Sweden)
Pavel Zaskalicky
2006-01-01
Full Text Available A serial wound DC motor is one of most used electrical machines in a small electrical instruments and home equipments by reason, that its speed is easily controlled by a supply voltage. Suppose that the motor is supplied by a semicontrolled rectifier and operate in open circuit loop. After representing of the mathematical model, a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of the rotor is determined as a function of the magnetic core saturation and of the armature reaction.
Genetic Design of an Interval Type-2 Fuzzy Controller for Velocity Regulation in a DC Motor
Directory of Open Access Journals (Sweden)
Yazmin Maldonado
2012-11-01
Full Text Available This paper proposes the design of a Type‐2 Fuzzy Logic Controller (T2‐FLC using Genetic Algorithms (GAs. The T2‐FLC was tested with different levels of uncertainty to regulate velocity in a Direct Current (DC motor. The T2‐FLC was synthesized in Very High Description Language (VHDL code for a Field‐programmable Gate Array (FPGA, using the Xilinx System Generator (XSG of Xilinx ISE and Matlab‐Simulink. Comparisons were made between the Type‐1 Fuzzy Logic Controller and the T2‐FLC in VHDL code and a Proportional Integral Differential (PID Controller so as to regulate the velocity of a DC motor and evaluate the difference in performance of the three types of controllers, using the t‐student test statistic.
Comparison between Conventional and Fuzzy Logic PID Controllers for Controlling DC Motors
Directory of Open Access Journals (Sweden)
Essam Natsheh
2010-09-01
Full Text Available Fuzzy logic and proportional-integral-derivative (PID controllers are compared for use in direct current (DC motors positioning system. A simulation study of the PID position controller for the armature-controlled with fixed field and field controlled with fixed armature current DC motors is performed. Fuzzy rules and the inferencing mechanism of the fuzzy logic controller (FLC are evaluated by using conventional rule-lookup tables that encode the control knowledge in a rules form. The performance assessment of the studied position controllers is based on transient response and error integral criteria. The results obtained from the FLC are not only superior in the rise time, speed fluctuations, and percent overshoot but also much better in the controller output signal structure, which is much remarkable in terms of the hardware implementation.
Evaluation of linear DC motor actuators for control of large space structures
Ide, Eric Nelson
1988-01-01
This thesis examines the use of a linear DC motor as a proof mass actuator for the control of large space structures. A model for the actuator, including the current and force compensation used, is derived. Because of the force compensation, the actuator is unstable when placed on a structure. Relative position feedback is used for actuator stabilization. This method of compensation couples the actuator to the mast in a feedback configuration. Three compensator designs are prop...
Fuzzy PID Controllers Using Matlab GUI Based for Real Time DC Motor Speed Control
Suhas Yadav*1
2014-01-01
In this paper, an integrated electronic system has been designed, constructed and tested. Controlling DC (Direct current) Motor drive is design and development of real time MATLAB –GUI based using fuzzy logic controller. First, a controller is designed according to fuzzy rules such that the systems are fundamentally robust. To obtain the globally optimal values, parameters of the fuzzy controller are improved by MATLAB-GUI based FLC and IFLC algorithms optimization model. Comp...
Copper Loss Analysis of Brushless DC Machines in Different Running State%不同运行状态下永磁无刷直流电机铜损分析
Institute of Scientific and Technical Information of China (English)
董蓉; 窦满峰; 刘立群
2011-01-01
为了准确分析永磁无刷直流电动机的运行特性,需要了解电机驱动恒转矩负载或恒功率负载时,不同的母线电压和占空比,对母线电流I1、绕组电流I-rms、铜损PCu1= 2I21以及PCu2=3I2-rmsR变化趋势的影响.从理论上分析了母线电流I1、绕组电流Irms-、铜损PCu1和pCu2的变化趋势以及pCu2-PCu1差值存在和变化的原因,得出两种铜损计算方法的差值是由换向续流电流和PWM斩波续流电流所引起,并分析得出铜损在总损耗中的比重随运行条件改变的变化趋势.仿真和试验证明了两种铜损计算方法存在差异,并且铜损差值随无刷直流电动机运行条件的不同而改变.%In order to accurately find out the operating characteristics of brushless DC machine,driving load with constant torque and constant power at different bus voltages and pulse-time tatio were discussed. The trends of bus current I1,winding current Irms copper loss pculI = 21_2~1? ,Pcu2 = 31_rms~2, Ccu =Pcu2 -Pcul and the reasons for the change of Ccu ,Pcu/Ptotal lossees were given out. The conclusion is that Ccu is caused by commutating continuous current and PWM chopping continuous current. Simulation and test show that Pcul is different from pCu2 and that Ccu changes with the operating characteristics.
A Modified High-Efficient Step-Up Sepic for DC Motor Drives
Directory of Open Access Journals (Sweden)
P. Dhanasekaran
2013-12-01
Full Text Available In this paper, Single-Ended Primary Inductor Converter (SEPIC fed DC motor is proposed. Soft-switching technique such as Zero-Voltage-Switching (ZVS and Zero-Current-Switching (ZCS operation plays a vital role in high voltage applications. Zero-Current-Switching (ZCS operation achieved due to resonance between the resonant inductor and the capacitor by using output diode and its reverse-recovery loss is subsequently reduced. Zero-Voltage-Switching (ZVS operation is achieved by using coupled inductor and auxiliary inductor. The model has been simulated through MATLAB/SIMULINK using Diode Bridge, SEPIC topology and closed loop DC motor load and it is modeled analytically. The proposed system is modeled with input side Diode Bridge Rectifier and SEPIC Topology with Proportional Integral (PI controller. The soft switching scheme for the proposed topology is developed with closed loop motor load. The motor voltage is achieved twice the rated voltage. The results are generated in MATLAB/SIMULINK and are shown.
Institute of Scientific and Technical Information of China (English)
吕永健; 李飞; 李子龙
2011-01-01
The switching system is one of the important models which describe the hybrid dynamical systems. Different models and the switching rules are adopted to better describe the motion of the actual complicated systems. Combined with advantages of the PMSM and BLDCM.the paper proposed the switching control strategy for brushless permanent magnet motor with the rule of output feedback based on switching system theory. Then the linear model of the switching control system was obtained and the stability of it was analyzed. The results of the simulation and the experiment show that the switching control strategy is stable and could effectively improve the efficiency and the function of the motor in full speed range.%切换系统是描述混杂动态系统的重要模型之一,采用不同的模态和切换规则可以更好地刻画一个实际复杂动态系统的运行轨迹.基于切换系统理论,结合正弦波和方波电流驱动的永磁无刷电动机的各自优势,提出了按输出状态反馈切换的永磁无刷电动机切换控制策略,建立了切换系统的线性化模型并对其稳定性进行了分析.仿真和实验结果表明,切换控制系统运行稳定,可有效地提高电机全速度范围内的运行效率和性能.
A New Energy Optimal Control Scheme for a Separately Excited DC Motor Based Incremental Motion Drive
Institute of Scientific and Technical Information of China (English)
Milan A.Sheta; Vivek Agarwal; Paluri S.V.Nataraj
2009-01-01
This paper considers minimization of resistive and frictional power dissipation in a separately excited DC motor based incremental motion drive (IMD). The drive is required to displace a given, fixed load through a definite angle in specified time, with minimum energy dissipation in the motor windings and minimum frictional losses. Accordingly, an energy optimal (EO) control strategy is proposed in which the motor is first accelerated to track a specific speed profile for a pre-determined optimal time period. Thereafter, both armature and field power supplies are disconnected, and the motor decelerates and comes to a halt at the desired displacement point in the desired total displacement time. The optimal time period for the initial acceleration phase is computed so that the motor stores just enough energy to decelerate to the final position at the specified displacement time. The parameters, such as the moment of inertia and coefficient of friction, which depend on the load and other external conditions, have been obtained using system identification method. Comparison with earlier control techniques is included. The results show that the proposed EO control strategy results in significant reduction of energy loases compared to the existing ones.
Efficiency consideration of DC link soft-switching inverters for motor drive applications
Energy Technology Data Exchange (ETDEWEB)
Lai, J.S.; Young, R.W.; McKeever, J.W.
1994-12-31
This paper critically evaluates efficiency of soft switching inverters including an actively clamped resonant dc link inverter and a clamped-mode resonant pole inverter. An analytical approach to evaluating efficiency of the clamped-mode soft switching inverter has been developed. The evaluation results are compared with that of the standard pulse-width-modulation (PWM) inverter. A 50-kW induction motor is used as the variable load, and the inverter efficiency is evaluated under different speed and torque conditions. The clamped-mode soft-switching inverter, although eliminating the switching loss, shows poor efficiency over the entire load range. Under low load conditions, the efficiency profile is even worse. The actively clamped resonant dc link inverter shows highest efficiency over the entire speed and torque range. However, its energy saving over the standard PWM inverter is marginal under full load or high speed conditions.
直流电动机新论%New Theory of DC Motor
Institute of Scientific and Technical Information of China (English)
王宗培; 陈敏祥
2012-01-01
The author found and put forward the new electromechanical concept of the DC rotating magnetic field in the New DCM research work. The DC rotating magnetic field is produced by the DC armature winding magnetic potential when commutation controller controls the conducting state and order of power switches in the electronic commutator. The change of the instantaneous current in the AC armature winding along the circumference produces an AC rotating magnetic field. Both DC and AC magnetic potential are produced by the armature winding circuit and are no relationship with the rotor mechanical relative motion. From the rotor? Perspective there is no difference between the armature winding magnetic potential produced by the DC winding current and the AC winding current. So the DC rotating magnetic field combined with different rotor structure can constitute the new concepts of the DC synchronous motor and the DC asynchronous motor, which are similar with the concepts of the AC synchronous motor and the AC asynchronous motor. This study will help to deepen our understanding and open mentality%作者在对新一代直流电动机( New DCM)的研究中发现并提出了直流旋转磁场这一电机学的新概念,是用换向控制器来控制电子换向器中功率开关管的导通状态及变化顺序,让通电直流电枢绕组磁势沿电枢表面圆周旋转而达到的.与交流旋转磁场一样,都是电枢绕组电路产生的磁势,它的旋转是由于电枢绕组线圈内电流瞬时值沿圆周分布变化引起的,与定转子机械相对运动没有关系.从转子的角度看电枢的旋转磁势是直流绕组电流还是交流绕组电流产生的并没有什么区别,所以对应不同的转子结构也能构成类似于交流同步电动机和交流异步电动机基本作用原理的电动机,又有所区别,出现了直流同步电动机和直流异步电动机的新概念和新名称.该文的研究有助于加深认识和开阔思路.
Directory of Open Access Journals (Sweden)
Muhammad Taufiq Ramadhan
2015-03-01
Full Text Available Penggunaan mobil listrik secara umum terkendala pada beban, kecepatan aktual, serta efisiensi energi. Pemanfaatan Fuzzy Logic Controller untuk pengaturan kecepatan motor DC pada mobil listrik diperlukan untuk meraih kecepatan aktual yang lebih presisi sehingga diperoleh efisiensi energi. Selain itu perlu juga menggunakan Bidirectional Buck-Boost Cascade Converter untuk pengaturan motor DC secara bidirectional, yakni pengaturan saat motoring dan saat pengereman regeneratif (regenerative braking. Hal ini berdasar pada energi yang terbuang percuma, baik itu rugi elektris maupun rugi mekanis saat pengereman.
Cooling efficiency of a brushless direct current stand fan
Yang, Bin; Schiavon, Stefano; Sekhar, Chandra; Cheong, David; Tham, Kwok Wai; Nazaroff, William W.
2015-01-01
In warm environments, isothermal cooling by deliberately enhanced air movement can maintain thermal comfort using less energy than compressor-based air conditioning. To evaluate the performance of a brushless direct current (DC) stand fan, the cooling fan efficiency (CFE) index was measured in a climatic chamber under four dry-bulb temperatures (24, 26, 28, and 30 °C), six speed In warm environments, isothermal cooling by deliberately enhanced air movement can maintain thermal comfort using l...
Design of Fuzzy PID controller to control DC motor with zero overshoot
Directory of Open Access Journals (Sweden)
Meenakshi Chourasiya
2014-10-01
Full Text Available Most of the real time operation based physical system, digital PID is used in field such as servo-motor/dc motor/temperature control system, robotics, power electronics etc. need to interface with high speed constraints, higher density PLD’s such as FPGA used to integrate several logics on single IC. There are some limitations in it to overcome these limitations Fuzzy logic is introduced with PID and Fuzzy PID is formed. This paper explains experimental design of Fuzzy PID controller. We aimed to make controller power efficient, more compact, and zero overshoot. MATLAB is used to design PID controller to calculate and plot the time response of the control system and Simulink to generate a set of coefficients.
Directory of Open Access Journals (Sweden)
Ibrahim Al-Abbas
2012-01-01
Full Text Available The cascade control of DC motors by PI controllers was extensively used in industry. Approximation rules based on plotting the output of the system or on computer simulation were used to determine the parameters of these controllers. This study was done to develop mathematical expressions to calculate the parameters of these controllers. Output time functions of the system and there derivatives were used to obtain mathematical relationships relating directly the motor parameters and the controller parameters. These relationships were used in tuning process of the cascade system. The dynamic performances of the system were examined in single loop form and in closed loop form for a step change in control variable (the input voltage as well as for step change in disturbance (mechanical load. The performances of current closed loop system and the speed closed loop were acceptable. The steady state error was zero and the maximum overshoot was less than 20%. The developed relationships can be used in design and analysis of cascade DC drive systems and cascade AC drive systems.
PMBLDC motor drive with power factor correction controller
DEFF Research Database (Denmark)
George, G.J.; Ramachandran, Rakesh; Arun, N.
2012-01-01
This paper presents a boost converter configuration, control scheme and design of single phase power factor controller for permanent magnet brushless DC motor (PMBLDCM) drive. PMBLDC motors are the latest choice of researchers, due to the high efficiency, silent operation, compact size, high...... reliability, and low maintenance requirements. The proposed Power Factor Controller topology improves power quality by improving performance of PMBLDCM drive, such as reduction of AC main current harmonics, near unity power factor. PFC converter forces the drive to draw sinusoidal supply current in phase...
Djemaï, M.; Busawon, K.; Benmansour, K.; Marouf, A.
2011-11-01
In this article, we present a high-order sliding mode controller of a DC motor drive connected to a multi-cellular converter. More specifically, we design a second-order (super-twisting) control algorithm for the speed regulation of a DC motor. For this, a switching control for the multi-cellular converter is derived in order to supply the correct reference value for the speed regulation. A practical implementation of the controller is realised using a laboratory set-up. The performance and the validity of the controller are shown experimentally.
Directory of Open Access Journals (Sweden)
Mikhov M.
2009-12-01
Full Text Available The performance of a two-coordinate drive system with permanent magnet synchronous motors is analyzed and discussed in this paper. Both motors have been controlled in brushless DC motor mode in accordance with the rotor positions. Detailed study has been carried out by means of mathematical modeling and computer simulation for the respective transient and steady-state regimes at various load and work conditions. The research carried out as well as the results obtained can be used in the design, optimization and tuning of such types of drive systems. They could be also applied in the teaching process.
Adaptive Neuro-Fuzzy Controller Experimental Design for DC Motor Connected to Unbalanced Load
Directory of Open Access Journals (Sweden)
Reza Nejati
2007-09-01
Full Text Available In two recent decades, fuzzy controllers have been used in controlling different systems successfully. In this article, a new method is given for controlling of permanent magnetic DC motor connected to unbalanced load. Imbalance of load leads to machine vibrations, fluctuation of power, making exhaustion in machine shaft, and equipment depreciation. In this article neuro-fuzzy controllers are used for controlling unbalanced load. Because of non-linear nature of load and machine, machine fluctuations are different in various speeds. For making controller adaptive with machine, using an artificial neural network, the input-output coefficients are be updated in any speed. Optimized coefficients obtained by using of direct search method, and with these coefficients, artificial neural network trained with Lauvenberg-Marcoardet method. Operational results obtained from developed system, shows the efficiency of given method.
Dynamic Characteristic Analysis of Linear DC Motor by 3D EMCN Considering Input Voltage
Energy Technology Data Exchange (ETDEWEB)
Ha, Kyung Ho; Yeom, Sang Bu [Changwon National University, Changwon(Korea); Hong, JUNG Pyo; Hur Jin; Kang Do Hyunc [Hanyang University(Seoul Campus), Seoul(Korea)
2002-02-01
In order to design the Linear DC Motor (LDM) With improved characteristics, transient and steady state analysis are required. Furthermore, 3D analysis is also needed to analyze the precise characteristics like thrust, time harmonics. This paper deals with the transient and dynamic characteristic analysis if LDM by coupling of external circuit and motion equation using 3D Equivalent Magnetic Circuit Network Method (EMCN). For the three dimensional analysis of electric machine, EMCN is very effective method that ensures high accuracy similar to FEM and short computation time. Also, The modeling by EMCN easily allows the mover to move with respect to the Sartre at each time Also, and the spatial moving step is determined by the solution of the mechanical motion equation and the computed electromagnetic thrust. The results are compared with experimental ones to clarify the usefulness and verify the accuracy of the proposed method. (author). 11 refs., 20 figs., 2 tabs.
Yee-Pien Yang; Jia-Ming Jiang
2015-01-01
This paper proposes an optimal design of a middle motor integrated into a mid-drive unit for pedal electric cycles. This middle motor is an axial-flux permanent magnet brushless DC motor with a stator plate. Facing this plate is a rotor plate that acts as an eccentric component of a cycloidal reducer next to the stator. Both the middle motor and cycloidal reducer are easily installed on the same axle of the bike crankset. In the preliminary design, driving requirements are used to make the mi...
Design and Thermal Analysis of a 300 Watt BLDC motor
Directory of Open Access Journals (Sweden)
Ali Jabbari
2009-12-01
Full Text Available This paper presents the mechanical design and transient thermal analysis of a permanent magnet Brushless DC motor to be replaced with an induction motor and its gearbox for a propulsion application requiring 300 W and 220 RPM. This work presents a suitable method for direct motor drive design. The critical design criterion is based on magnet demagnetization. The motor has magnets inset into the surface of the rotor to give a maximum field-weakening range. A prototype model is fabricated based on the presented method. Analytically based lumped circuit method for thermal analysis has been used to simulate the motor. Simulation results are compared with practical measurements. The comparison of the results shows that the presented method has a high efficiency in design and thermal analysis of BLDC motors.
PC based speed control of dc motor using fuzzy logic controller
Energy Technology Data Exchange (ETDEWEB)
Mandal, S.K.; Kanphade, R.D.; Lavekar, K.P.
1998-07-01
The dc motor is extensively used as constant speed drive in textile mills, paper mills, printing press, etc.. If the load and supply voltage are time varying, the speed will be changed. Since last few decades the conventional PID controllers are used to maintain the constant speed by controlling the duty ratio of Chopper. Generally, four quadrant chopper is used for regenerative braking and reverse motoring operation. Fuzzy Logic is newly introduced in control system. Fuzzy Control is based on Fuzzy Logic, a logical system which is too much closer in spirit to human thinking and natural language. The Fuzzy Logic Controller (FLC) provides a linguistic control strategy based on knowledge base of the system. Firstly, the machine is started very smoothly from zero to reference speed in the proposed scheme by increasing the duty ratio. Then change and rate of change of speed (dN, dN/dt), change and rate of change input voltage (dV, dV/dt) and load current are input to FLC. The new value of duty ratio is determined from the Fuzzy rule base and defuzzification method. The chopper will be 'ON' according to new duty ratio to maintain the constant speed. The dynamic and steady state performance of the proposed system is better than conventional control system. In this paper mathematical simulation and experimental implementation are carried out to investigate the drive performance.
Application brushless machines with combine excitation for a hybrid car and an electric car
Directory of Open Access Journals (Sweden)
Gandzha S.A.
2015-08-01
Full Text Available This article shows advantages of application the brushless machines with combined excitation (excitation from permanent magnets and excitation winding for the hybrid car and the electric car. This type of electric machine is compared with a typical brushless motor and an induction motor. The main advantage is the decrease of the dimensions of electric machine and the reduction of the price for an electronic control system. It is shown the design and the principle of operation of the electric machine. The machine was modeled using Solidworks program for creating design and Maxwell program for the magnetic field analysis. The result of tests is shown as well.
Directory of Open Access Journals (Sweden)
Hadeed Ahmed Sher
2016-07-01
Full Text Available Induction motors are widely used in industrial power plants due to their robustness, reliability and high performance under variable operating conditions in the electrical power system. Modern industrial progress is dependent on these ruggedly constructed induction motors. Almost every sophisticated process of the industry is based on induction motors. Most of these motors are controlled by means of inverters that change the line frequency. The change in parameters of inverter makes it possible to control the motor according to the design requirements. The reliability of inverter based motor control is an important issue for industrial applications and therefore, it becomes very vital for design engineers to have comprehensive analysis of the inverter fed induction machine. This paper investigates one of the faults that may occur on the DC link of an inverter fed induction motor. The effect of the capacitor short circuit is presented in this paper. It also deals with the effects of short circuited capacitor on freewheeling diode. DC link capacitors are well designed and even the probability of capacitor failure is high, it is always a rare case if they puncture, however this analysis will add to the reliability of the induction machine under variable operating condition.
无刷直流电机控制系统的建模仿真分析%Modeling and Simulation Analysis of Brushless DC Motor Control System
Institute of Scientific and Technical Information of China (English)
石江涛; 潘峰; 罗方利
2014-01-01
The mathematical model of a BLDCM was analysed ,and the simulation model of BLDCM control system was set up using MATLAB simulation software .This system adopted the scheme of double closed loop control including PID speed control and the current hysteresis control ,in order to track PWM signal and control the inverter switch on and off more conveniently .The test result shows that system works well ,and the feasibility of the scheme is verified .%分析了BLDCM 的数学模型，运用MATLAB仿真软件搭建了无刷直流电机控制系统的仿真模型。本系统采用了速度PID控制、电流迟滞控制的双闭环控制方案，电流迟滞控制是为了更方便地跟踪PWM信号并控制逆变器开关的导通与关断。通过试验结果可以看出系统能够稳定运行，进而验证了该方案的可行性。
Commutation Zero-Crossing Detection of Brushless DC Motor%直流无刷电机的换相过零检测
Institute of Scientific and Technical Information of China (English)
徐丹; 李庆东; 蒋猛; 李博; 孔维蓉; 徐波
2014-01-01
While the key of control BLDCM is confirming the zero-crossing and commutation time, so a simple structure circuit of zero-crossing detection was proposed. The real-time monitoring and analysis of the input and output signals of the circuit indicate that:if the controller uses interrupt to test zero-crossing, it must increase a comparator circuit after the zero-crossing detection circuit to filter the irregular triangular pulses to form standard rectangular pulses;if CPU uses queries to detect zero-crossing, the query should be during low level of the PWM, or will get error results. The experiment demonstrates that permanent magnet BLDCM can accurately obtain zero-crossing signals through the above two methods.%控制直流无刷电机的关键在于确定过零点和换相时刻，为此提出了一种结构简单的过零检测电路。对该电路输入和输出信号的实时监测与分析表明：如果控制器采用中断方式检测过零点，则必须在过零检测电路后增加一个比较电路来过滤不规整的三角脉冲以形成标准的矩形脉冲；如果CPU采用查询方式检测过零点，则应在PWM的低电平期间进行查询，否则会出现错误结果。试验论证了通过以上两种方式可以准确获得永磁直流无刷电机过零时刻信号。
Brushless DC Motors with Divided Armature and Hinged Armature%拼块式和铰链式无刷直流电动机
Institute of Scientific and Technical Information of China (English)
王峥
2010-01-01
主要介绍两种新型的无刷直流电动机电枢结构,即拼块式和铰链式电枢.分析了采用该电枢结构的条件,然后详细介绍其电枢冲片、电枢铁心和槽绝缘,并举例介绍拼块式无刷直流电动机电枢的嵌线和拼装.最后通过对比说明,采用拼块式和铰链式电枢结构能够大大节约电枢铁心成本,提高电机性能.
Directory of Open Access Journals (Sweden)
P. Karpagavalli
2013-01-01
Full Text Available This study presents the performance of a new four quadrant single phase DC drive closed loop system controlled by proportional integral and derivative controller with Pulse Width Modulation (PWM full bridge DC-DC converter using bipolar voltage switching. The proposed method is found to be more efficient in improving the step response characteristics such as reducing the settling time, rise time, steady state error and maximum overshoot in speed response of the closed loop DC motor drive and also reduced total harmonics distortion in the AC line current when compared to open loop system. The proposed topologies were simulated using MATLAB/Simulink software package and the results were obtained.
Design of BLDCM Driving and Control System for Motorized Treadmill
Institute of Scientific and Technical Information of China (English)
Qi Zhang; Hui Li; Li-Bin Wang
2007-01-01
To satisfy the requirement of developing a new generation of motorized treadmill for a famous domestic manufacturer, a brushless DC motor (BLDCM) driving and control system for motorized treadmill is developed. High integration and reliability of this system are ensured under the condition that intelligent power module (TPM) is used and the protection module is included. Periodic current control method is applied to reduce the average current flowing through the armature winding of the motor when the treadmill is required to start with low speed while large load is added. Piecewise proportion-integration-differentiation (PID) control algorithm is applied to solve the problem of speed fluctuation when impulse load is added. The motorized treadmill of a new generation with the driving and control system has the advantages of high reliability, good speed stability, wide timing scope, low cost, and long life-span. And it is very promising for practical applications.
Stability Analysis of BLDC Motor Drive based on Input Shaping
Directory of Open Access Journals (Sweden)
M.Murugan
2013-10-01
Full Text Available The main objective of this work is to analyze the brushless DC (BLDC motor drive system with input shaping using classical control theory. In this paper, different values of damping ratio are used to understand the generalized drive performance. The transient response of the BLDC motor drive system is analyzed using time response analysis. The dynamic behaviour and steady state performance of the BLDC motor drive system is judged and compared by its steady state error to various standard test signals. The relative stability of this drive system is determined by Bode Plot. These analysis spotlights that it is possible to obtain a finite-time setting response without oscillation in BLDC motor drive by applying input in four steps of different amplitude to the drive system. These analyses are helpful to design a precise speed control system and current control system for BLDC motor drive with fast response. The Matlab/Simulink software is used to perform the simulation.
International Nuclear Information System (INIS)
Field orientation control of induction machine (IM) drives is a well-known strategy which has a fast dynamic response. In this paper, the direct rotor flux field orientation control of speed sensorless IM drive is presented. A two level space vector modulation inverter is employed to generate the command stator voltage. In proposed control scheme, a maximum torque per ampere strategy is achieved using a so-called fast flux search method. Based on this method, for a given load torque and rotor speed, the magnitude of rotor reference flux is adjusted step by step until the effective value of stator current becomes minimized finally. In addition, using the IM fifth order model in the stationary reference frame, a nonlinear rotor flux observer is developed which is also capable of motor resistances and rotor speed simultaneously estimation. Moreover, a useful method is introduced for dc offset compensation which is a major problem of ac drives especially at low speeds. The proposed control idea is experimentally implemented in real time using a CPLD board synchronized with a personal computer. Simulation and experimental results are finally presented to confirm the validity and effectiveness of the proposed method.
Directory of Open Access Journals (Sweden)
Saswati Swapna Dash
2014-07-01
Full Text Available This paper presents an overall study of Feedback Control of Z-Source Converter Fed Separately excited DC motor with centrifugal Pump Set. Z-source converter can be used for both voltage buck and boost mode using LC impedance network. In this paper the dynamic modeling of Z-source with motor load and centrifugal pump set is carried out with new findings. The compensators for speed feedback loop are designed by taking average state space analysis and small signal model of the system. The feedback loop is designed by classical control methods. The experiment is done in MATLAB work environment and the result is verified by Simulation.
Saswati Swapna Dash; Byamakesh Nayak; Subrat Kumar
2014-01-01
This paper presents an overall study of Feedback Control of Z-Source Converter Fed Separately excited DC motor with centrifugal Pump Set. Z-source converter can be used for both voltage buck and boost mode using LC impedance network. In this paper the dynamic modeling of Z-source with motor load and centrifugal pump set is carried out with new findings. The compensators for speed feedback loop are designed by taking average state space analysis and small signal model of the system. The feedba...
Analysis of Variable Speed PFC Chopper Fed BLDC Motor Drive
Directory of Open Access Journals (Sweden)
A Jeya Selvan Renius
2015-02-01
Full Text Available This paper provides the detailed analysis of the DC-DC chopper fed Brushless DC motor drive used for low-power applications. The various methods used to improve the power quality at the ac mains with lesser number of components are discussed. The most effective method of power quality improvement is also simulated using MATLAB Simulink. Improved method of speed control by controlling the dc link voltage of Voltage Source Inverter is also discussed with reduced switching losses. The continuous and discontinuous modes of operation of the converters are also discussed based on the improvement in power quality. The performance of the most effective solution is simulated in MATLAB Simulink environment and the obtained results are presented.
Rahat Ullah Khan,; Mohd. Arif Khan,; Huma Arjumand
2010-01-01
In this paper an innovative technique is proposed to run a DC series motor and converting it into D C separately excited as and when required to do regenerative braking and controlling a loaded car. In this scheme we are proposing on alternate energy source for driving the car i.e. solar PV Cell based battery charging system. The implication, basic concept and limitations of this concept are discussed. Also the mode of operations including analysis and operating conditions is also discussed. ...
Permanent magnet DC motor for welding machine%焊机用永磁直流电机
Institute of Scientific and Technical Information of China (English)
刘宝树
2013-01-01
永磁直流电动机以其体积小、效率高、结构简单、运行可靠、调节特性好(调节特性线性度好、调节范围宽且便于控制)等优点,广泛运用于焊接送丝领域.从永磁直流电动机的稳态运行特性、电机运行特性的温度敏感性、动态特性几个方面对电机的特性进行阐述,为送丝电机的造型提供参考.%Magnetic DC motor with its small size,high efficiency,simple structure,reliable operation,good regulation characteristics (regulation characteristics of good linearity, wide adjustable range and easy to control) and other advantages, is widely used in the field of welding wire feeding.From the permanent magnet DC motor steady state characteristic of motor operating characteristics,temperature sensitivity,dynamic characteristic of the motor characteristics are described.
Diagnostics of DC and Induction Motors Based on the Analysis of Acoustic Signals
Directory of Open Access Journals (Sweden)
Glowacz A.
2014-10-01
Full Text Available In this paper, a non-invasive method of early fault diagnostics of electric motors was proposed. This method uses acoustic signals generated by electric motors. Essential features were extracted from acoustic signals of motors. A plan of study of acoustic signals of electric motors was proposed. Researches were carried out for faultless induction motor, induction motor with one faulty rotor bar, induction motor with two faulty rotor bars and flawless Direct Current, and Direct Current motor with shorted rotor coils. Researches were carried out for methods of signal processing: log area ratio coefficients, Multiple signal classification, Nearest Neighbor classifier and the Bayes classifier. A pattern creation process was carried out using 40 samples of sound. In the identification process 130 five-second test samples were used. The proposed approach will also reduce the costs of maintenance and the number of faulty motors in the industry.
Closed Loop Speed Control of a BLDC Motor Drive Using Adaptive Fuzzy Tuned PI Controller
Directory of Open Access Journals (Sweden)
Sri Latha Eti
2014-11-01
Full Text Available Brushless DC Motors are widely used for many industrial applications because of their high efficiency, high torque and low volume. This paper proposed an improved Adaptive Fuzzy PI controller to control the speed of BLDC motor. This paper provides an overview of different tuning methods of PID Controller applied to control the speed of the transfer function model of the BLDC motor drive and then to the mathematical model of the BLDC motor drive. It is difficult to tune the parameters and get satisfied control characteristics by using normal conventional PI controller. The experimental results verify that Adaptive Fuzzy PI controller has better control performance than the conventional PI controller. The modeling, control and simulation of the BLDC motor have been done using the MATLAB/SIMULINK software. Also, the dynamic characteristics of the BLDC motor (i.e. speed and torque as well as currents and voltages of the inverter components are observed by using the developed model.
Institute of Scientific and Technical Information of China (English)
LIU Man-lan; ZHU Chun-bo; WANG Tie-cheng
2005-01-01
In order to guarantee quality during mass serial production of motors, a convenient approach on how to detect and diagnose the faults of a permanent-magnetic DC motor based on armature current analysis and BP neural networks was presented in this paper. The fault feature vector was directly established by analyzing the armature current. Fault features were extracted from the current using various signal processing methods including Fourier analysis, wavelet analysis and statistical methods. Then an advanced BP neural network was used to finish decision-making and separate fault patterns. Finally, the accuracy of the method in this paper was verified by analyzing the mechanism of faults theoretically. The consistency between the experimental results and the theoretical analysis shows that four kinds of representative faults of low power permanent-magnetic DC motors can be diagnosed conveniently by this method. These four faults are brush fray, open circuit of components, open weld of components and short circuit between armature coils. This method needs fewer hardware instruments than the conventional method and whole procedures can be accomplished by several software packages developed in this paper.
Institute of Scientific and Technical Information of China (English)
王鼎; 谢顺依; 连军强
2011-01-01
针对集成电机推进器(IMP)一体化结构要求电机功率密度大,效率高的特点,采用将混沌优化算法嵌入蚁群算法的混合智能优化算法——昆沌蚁群算法(CACA)对集成电机推进器特种电机设计方案进行优化,该方法充分利用以上2种优化算法的优点,即蚁群算法的高精度和混沌算法的快速性.优化结果显示,优化后的设计方案使电机效率提高了1.6％,有效体积缩小了5.6％,使电机能更好地适应高启动场合要求,优化效果良好,可为鱼雷IMP特种电机的设计提供参考.%To enhance power density and work efficiency of the special brushless DC motor for the integrated motor propulsor (IMP) of a torpedo, a hybrid optimum intelligent algorithm, named chaos ant colony algorithm (CACA), is presented. This method embeds a chaos optimization algorithm into ant colony algorithm. The special brushless DC motor is optimized by making use of the high accuracy of the ant colony algorithm and the rapidness of the chaos optimization algorithm. The optimization results of the motor show that the efficiency is enhanced by 1.6% and the volume is reduced by 5.6%. The proposed chaos ant colony algorithm may become a tool for the design of special brushless DC motor of torpedo IMP.
Farid Khoucha; Khoudir Marouani; Mohamed Benbouzid; Abdelaziz Kheloui; Abdeslam Mamoune
2013-01-01
International audience This paper presents a new hybrid cascaded H-bridge multilevel inverter motor drive DTC scheme for electric vehicles where each phase of the inverter can be implemented using a single DC source. Traditionally, each phase of the inverter requires n DC source for (2n + 1) output voltage levels. In this paper, a scheme is proposed that allows the use of a single DC source as the first DC source which would be available from batteries or fuel cells, with the remaining (n ...
Directory of Open Access Journals (Sweden)
Rahat Ullah Khan,
2010-03-01
Full Text Available In this paper an innovative technique is proposed to run a DC series motor and converting it into D C separately excited as and when required to do regenerative braking and controlling a loaded car. In this scheme we are proposing on alternate energy source for driving the car i.e. solar PV Cell based battery charging system. The implication, basic concept and limitations of this concept are discussed. Also the mode of operations including analysis and operating conditions is also discussed. The simulation results are provided to validate the concept.
A DC motor rolling door controll er%直流电机卷帘门控制器
Institute of Scientific and Technical Information of China (English)
蔡小伟; 黄桂萍; 范宜标
2016-01-01
A STM8-based controller for DC motor rolling door is designed ,which is composed of relay control ,overcurrent detection ,battery charging ,radio reception ,power control and host control .The software of the controller is analyzed .%以STM8为主控的直流电机卷帘门控制器由继电器控制输出电路、过流检测电路、电池充电电路、无线接收电路、电源控制电路及主控电路组成，并对系统软件进行了分析。
Directory of Open Access Journals (Sweden)
Glowacz Witold
2015-03-01
Full Text Available In this article results of diagnostic investigations of separately excited DC motor were presented. In diagnostics were applied a Fourier analysis method based on the fast Fourier transform (FFT and a recognition method using Bayes classifier. In training process a set of the most important frequencies has been determined for which differences of corresponding signals in two states are the largest. Three categories of signals have been recognized in identification process: faultless state, state of the rotor broken one coil and state of the rotor shorted three coils.
A Five-Level Cascade Multilever Invertor Three-Phase Motor Drive Using a Single DC Source
Energy Technology Data Exchange (ETDEWEB)
Chiasson, J.N. (Univ. Tennessee-Knoxville)
2006-09-15
A method is presented showing that a 5-level cascade multilevel inverter for a three-phase permanent magnet synchronous motor drive can be implemented using only a single DC link to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. It is shown that the capacitor voltages can be regulated while achieving an output voltage waveform that is 20% greater than that obtained using the standard 3-leg inverter alone. Finally conditions are given in terms of the power factor and modulation index that determine when the capacitor voltage can regulated.
A Five-Level Cascade Multilevel Inverter Three-Phase Motor Drive Using a Single DC Source
Energy Technology Data Exchange (ETDEWEB)
Chiasson, J. N. [University of Tennessee, Knoxville (UTK)
2006-10-01
A method is presented showing that a 5-level cascade multilevel inverter for a three-phase permanent magnet sychronous motor drive can be implemented using only a single DC link to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. It is shown that the capacitor voltages can be regulated while achieving an output voltage waveform that is 20% greater than that obained using the standard 3-leg inverter alone. Finally conditions are given in terms of the power factor and modulation index that determine when the capacitor voltage can regulated.
DEFF Research Database (Denmark)
Munteanu, A.; Agarlita, S. C.; Blaabjerg, Frede;
2012-01-01
The present paper introduces a novel six-step commutation strategy for sensorless control applied for a surface permanent magnet synchronous motor that implies only dc link measurement (battery current and battery voltage). The control strategy makes use of a modified I-f starting procedure...... and then switches seamlessly to sensorless speed control. Soft-switching for the six-step commutation pattern is considered. It will be shown that the current absorbed from the battery contains consistent information that can be used to determine the commutation points; the detection of the zero......-crossing of the back-emf are obtained from an observer that uses both current and battery voltage. The case study is represented by a surface permanent magnet synchronous motor prototype (6 /8 configuration), designed for the automotive air conditioning compressor drive....
Reversible thyristor converters of brushless synchronous compensators
Directory of Open Access Journals (Sweden)
А.М.Galynovskiy
2013-12-01
Full Text Available Behavior of models of three-phase-to-single-phase rotary reversible thyristor converters of brushless synchronous compensators in a circuit simulation system is analyzed. It is shown that combined control mode of opposite-connected thyristors may result in the exciter armature winding short circuits both at the thyristor feed-forward and lagging current delay angles. It must be taken into consideration when developing brushless compensator excitation systems.
Nishiyama, N.; Tanimoto, K.; Makino, A.
2016-05-01
Recently updated nanocrystalline soft magnetic Fe-Co-Si-B-P-Cu alloys "NANOMET®" exhibit high saturation magnetic flux density (Bs > 1.8 T), low coercivity (Hc motors or transformers for electrical appliances are now under developing by industry-academia collaboration. In particular, it is found that a brushless DC motor using NANOMET® core exhibited remarkable improvement in energy consumption. The prototype motor with an outer core diameter of 70 mm and a core thickness of 50 mm was constructed using laminated nano-crystallized NANOMET® ribbons. Core-loss for the constructed motor was improved from 1.4 W to 0.4 W only by replacing the non-oriented Si-steel core with NANOMET® one. The overall motor efficiency is evaluated to be 3% improvement. In this work, the relation between processing and resulting magnetic properties will be presented. In addition, feasibility for commercialization will also be discussed.
Control of plasma layer in a fusion reactor correlated to DC motor control using PSO-ANFIS
International Nuclear Information System (INIS)
Plasma position and shape control is very crucial for the overall performance of the fusion reactor such as Tokamak. The quality of the discharge in the Saskatchewan TORus-Modified (STOR-M) tokamak is strongly related to the position of the plasma column within the discharge vessel. If the plasma column approaches too near the wall, then either minor or complete disruption occurs. Consequently it is necessary to be able to control dynamically the position of the plasma column throughout the entire discharge. Now a day's most fusion reactor employs the traditional PID controller for the confinement of plasma layer. Fuzzy logic is used for the control of Plasma layer. In this paper we have used the hybrid of PSO-ANFIS technique to control the speed of a DC motor. We have used two input parameters like speed, torque and output is firing angle. In our work first order Sugeno fuzzy model is taken with three rules and the parameters of Gaussian membership function is controlled by the PSO technique. PSO-ANFIS speed controller obtains better dynamic behavior and superior performance of the DC motor speed control. Similar approach can be correlated to the control of plasma layer. For the plasma control two inputs can be taken as plasma position ΔH and the plasma current and the single output, the control decision u(t). (author)
Performance Variation of Ferrite Magnet PMBLDC Motor with Temperature
DEFF Research Database (Denmark)
Fasil, Muhammed; Mijatovic, Nenad; Jensen, Bogi Bech;
2015-01-01
The price fluctuations of rare earth metals and the uncertainty in their availability has generated an increased interest in ferrite magnet machines. The influence of temperature on BH characteristics of the ferrite magnet differ considerably from that of the rare earth magnet and hence, requires...... a different approach when deciding their operating point. In this work, laboratory measured BH curves of a ferrite magnet are used for estimating the possibility of demagnetization in a segmented axial torus (SAT) permanent magnet brushless DC (PMBLDC) motor. The BH characteristics for different temperatures...... have been used to study the performance variation of the ferrite magnet SAT PMBLDC motor with temperature. A detailed analysis is carried out to ensure that, the designed ferrite magnet motor is capable of delivering the specified torque throughout the operating speed, without any irreversible...
Ring of Fire Accident Prevention and Handling of DC Motor%关于直流电机环火事故预防及处理
Institute of Scientific and Technical Information of China (English)
芶大斌
2012-01-01
某发电企业曾发生过发电机励磁机环火的事故,本文阐述了直流电机环火事故的预防和解决直流电机环火事故的措施.%A power generation companies have occurred in the generator exciter ring of fire accidents, This paper describes the measures of the ring of fire prevention of accidents of the DC motor and DC motor ring of fire accident.
Design and Analysis of an Axially Laminated Reluctance Motor for Variable-Speed Applications
Directory of Open Access Journals (Sweden)
BESER, E. K.
2013-02-01
Full Text Available In this paper, an axially laminated reluctance motor is presented. First, a set of a finite element analysis (FEA on three different axially laminated rotor geometries was carried out and torque profiles of the rotors were predicted. The effect of the stator slot skewing on the torque profiles were also examined in the analysis. After deciding the rotor geometry, the mathematical model of the proposed motor was formed in terms of a,b,c variables and simulations were performed. Motor prototype and motor drive were introduced. Torque profiles of the motor were measured for different current values and load test were realized. Experimental results were compared to analysis and simulation results. There is a good accordance between experimental and simulation results. When the proposed motor is operated with electrical 120? mode as a brushless DC motor, the torque versus speed characteristic shows a DC series motor characteristic and speed of the motor can be easily controlled by regulating the bus voltage. These features make the proposed motor convenient for variable-speed applications such as electrical vehicles.
Directory of Open Access Journals (Sweden)
Paul Cepeda
2014-01-01
Full Text Available How can students be given experience in the confused realities of engineering processes? How can undergraduate students be convinced that processes can be analyzed and improved? Computer simulations properly designed and applied could answer these challenges revolutionizing education in Power Electronics. In recent years, computer simulation has been commonly used in education to motivate students in their learning and help teachers to improve their teaching level. The present paper focuses on developing a speed controller for DC motors starting from theoretical aspects, passing through simulations, and finally reaching a control prototype. The control theory is based on a nonlinear technique known as Sliding Mode Control (SMC involving artificial intelligence for optimization such as Fuzzy Logic (FL, Adaptive Neurofuzzy Inference Systems (ANFIS, and Genetic Algorithms (GAs.
Excited DC Motor Reverse Braking Exploration%他励直流电动机反接制动探析
Institute of Scientific and Technical Information of China (English)
王春; 赵宜静
2013-01-01
Separately excited DC motor braking teaching, students often have difficulty understanding potential energy load reverse connect brake and an armature of reverse braking of difference. The author from the armature circuit voltage balance equation, the mechanical characteristic curve of proceed analysis explain, make students more easily understand and master.%他励直流电动机的反接制动教学中,学生往往难以理解位能负载时的反接制动和电枢反接制动的区别.该文从电枢电路的电压平衡方程式、机械特性曲线着手进行分析讲解,使得学生较易理解和掌握.
Simulation of an Electromechanical Spin Motor System of a Control Moment Gyroscope
Inampudi, Ravi; Gordeuk, John
2016-01-01
A two-phase brushless DC motor (BDCM) with pulse-width modulated (PWM) voltage drive is simulated to control the flywheel speed of a control moment gyroscope (CMG). An overview of a double-gimballed control moment gyroscope (DGCMG) assembly is presented along with the CMG torque effects on the spacecraft. The operating principles of a two-phase brushless DC motor are presented and the system's electro-mechanical equations of motion are developed for the root-mean-square (RMS) currents and wheel speed. It is shown that the system is an extremely "stiff" set of first-order equations for which an implicit Euler integrator is required for a stable solution. An adaptive proportional voltage controller is presented which adjusts the PWM voltages depending on several control modes for speed, current, and torque. The simulation results illustrate the interaction between the electrical system and the load dynamics and how these influence the overall performance of the system. As will be shown, the CMG spin motor model can directly provide electrical power use and thermal power output to spacecraft subsystems for effective (average) calculations of CMG power consumption.
Viridi, Sparisoma; Permana, Sidik; Srigutomo, Wahyu; Susilawati, Anggie; Nuryadin, Bebeh Wahid; Nurhasan,
2014-01-01
In lifting mass vertically using a DC electric motor energy conversion from electric energy, through intermediate kinetic energy, to gravitation potential energy shows that time required {\\Delta}t to lift load mass m for height h is dependent quadratically to m. Several approaches to explain the experiment observation are discussed in this work, from ideal energy conversion to numerical solution from differential equation.
An improved iron loss estimation for permanent magnet brushless machines
Fang, D
1999-01-01
This paper presents an improved approach for predicting iron losses in permanent magnet brushless machines. The new approach is based on the fundamental concept that eddy current losses are proportional to the square of the time rate of change of flux density. Expressions are derived for predicting hysteresis and eddy current losses in the stator teeth and yoke. The so-called anomalous or excess losses, caused by the induced eddy current concentration around moving magnetic domain walls and neglected in the conventional core loss calculation, are also included in the proposed approach. In addition, the model is also capable of accounting for the stator skewing, if present. The core losses obtained from the proposed approach are compared with those measured on an existing PM motor at several operating speeds, showing very good agreement. (14 refs).
Directory of Open Access Journals (Sweden)
S. Mahdiuon-Rad
2013-08-01
Full Text Available This paper investigates both static and dynamic eccentricities in single phase brushless DC (BLDC motors and analyzes the effect of the PM magnetization field on unbalanced magnetic forces acting on the rotor. Three common types of PM magnetization field patterns including radial, parallel and sinusoidal magnetizations are considered. In both static and dynamic eccentricities, harmonic components of the unbalanced magnetic forces on the rotor are extracted and analyzed. Based on simulation results, the magnetization fields that produce the lowest and highest unbalanced magnetic forces are determined in rotor eccentricity conditions.
Directory of Open Access Journals (Sweden)
Farid Khoucha
2013-01-01
Full Text Available This paper presents a new hybrid cascaded H-bridge multilevel inverter motor drive DTC scheme for electric vehicles where each phase of the inverter can be implemented using a single DC source. Traditionally, each phase of the inverter requires DC source for output voltage levels. In this paper, a scheme is proposed that allows the use of a single DC source as the first DC source which would be available from batteries or fuel cells, with the remaining ( DC sources being capacitors. This scheme can simultaneously maintain the capacitors of DC voltage level and produce a nearly sinusoidal output voltage due to its high number of output levels. In this context, high performances and efficient torque and flux control are obtained, enabling a DTC solution for hybrid multilevel inverter powered induction motor drives intended for electric vehicle propulsion. Simulations and experiments show that the proposed multilevel inverter and control scheme are effective and very attractive for embedded systems such as automotive applications.
Directory of Open Access Journals (Sweden)
Abdelfettah Zeghoudi
2015-06-01
Full Text Available Recent research in the field of motor controls is becoming more interesting especially with the developments of new control methods. This study shows a comparative study between two artificial intelligence methods namely neural networks and fuzzy logic for the speed control of a DC motor for the orientation of a heliostat in a solar tower power plant. The speed controller of DC motor is performed using two Fuzzy Logic Configuration (FLC1 and FLC2 and neural controller in MATLAB environment. The simulation results are used to make sure the real possibility of using artificial intelligence systems to identify and control this type of installation. The performance of the Fuzzy Logic Controller and Neural control are compared using different errors metrics. The results show that Fuzzy logic method is more efficient compared with neural controller method.
Institute of Scientific and Technical Information of China (English)
杜世勤; 章跃进; 江建中
2007-01-01
With the air gap magnetic field distribution of surface mounted permanent magnet(PM)motors obtained using an analytical technique,the instantaneous electromagnetic torque and its corresponding components are investigated with the Maxwell stress tensor method.Accurate results can easily be achieved using the proposed method without using the tedious finite element analysm(FEA).In this paper,the electromagnetic torque of a surface mounted PM motor with two phases energized is decomposed into four torque components.This technique is useful not only for the design and optimization of the permanent magnet motor,but also for the choice of control strategy.
Deign and Optimization of the Inverter Refrigerator Compressor Motor%变频冰箱压缩机电机设计与优化
Institute of Scientific and Technical Information of China (English)
2012-01-01
In this paper, the finite element analysis of permanent magnet brushless DC motor as a basis, onwhich the combination of motor design optimization theory to optimize same design parameters. Development practice in the compressor type QD135PYR in our company has proved that this method can effectively improve the performance of the brushless DC motor, reduce development time, and improve the efficiency of motor design.% 本文在变频冰箱用压缩机电机设计中采用有限元作为设计基础，对电机性能进行了模拟仿真分析，结合电机设计优化理论对电机部分参数进行了优化设计。通过在黄石东贝电器股份有限公司QD135PYR压缩机上的应用实践证明，采用该方法能有效改善无刷直流电机的性能，缩短电机开发时间，提升电机设计效率。
Institute of Scientific and Technical Information of China (English)
杨晓武; 李干蓉; 李劲松
2012-01-01
The advantage and application area of Brushless Direct Current Motor（BLDCM） was described, the relative mathematic model was built and the effect of electromagnetic torque ripple on the performance of BLDCM was elaborat- ed. The paper discussed factors that affected the torque ripple from the case of the ideal back-EMF and non-ideal back-EMF for BLDCM, then the relevant control strategy are put forward to minimize the torque ripple. The strategy com- bines the advanced commutation with the current control to minimize the torque ripple caused by non-ideal back-EMF. Finally, the paper built simulation model for BLDCM by using software MATLAB according to the proposed control strat- egy targeted at torque ripple, the experimental simulation results show that the proposed control strategy for reducing torque ripple is correct and reasonable.%在介绍无刷直流电机的优点及其应用领域的基础上，建立了电机的基本数学模型，并且阐述了其电磁转矩波动对电机运行中性能的影响，重点从理想反电动势无刷直流电机和非理想反电动势无刷直流电机两种情况下分析电磁转矩波动的因素，并采用相对的控制策略来控制电磁转矩波动；提前角开通换相法与电流控制相结合的控制策略，最后，利用MATLAB仿真软件组建了无刷直流电机的仿真模型，仿真实验结果验证了所提出的转矩波动控制策略的合理性和正确性。
A dual-channel flux-switching permanent magnet motor for hybrid electric vehicles
Hua, Wei; Wu, Zhongze; Cheng, Ming; Wang, Baoan; Zhang, Jianzhong; Zhou, Shigui
2012-04-01
The flux-switching permanent magnet (FSPM) motor is a relatively novel brushless machine having both magnets and concentrated windings in the stator, which exhibits inherently sinusoidal PM flux-linkage, back-EMF waveforms, and high torque capability. However, in the application of hybrid electric vehicles, it is essential to prevent magnets and armature windings moving in radial direction due to the possible vibration during operation, and to ensure fault-tolerant capability. Hence, in this paper based on an original FSPM motor, a dual-channel FSPM (DC-FSPM) motor with modified structure to fix both armature windings and magnets and improved reliability is proposed for a practical 10 kW integral starter/generator (ISG) in hybrid electric vehicles. The influences of different solutions and the end-effect on the static characteristics, are evaluated based on the 2D and 3D finite element analysis, respectively. Finally, both the predicted and experimental results, compared with a prototype DC-FSPM motor and an interior PM motor used in Honda Civic, confirm that the more sinusoidal back-EMF waveform and lower torque ripple can be achieved in the DC-FSPM motor, whereas the torque is smaller under the same coil current.
Institute of Scientific and Technical Information of China (English)
刘康红
2016-01-01
The traction motor used in explosion-proof electric drive vehicle must has a large overload capability ,good low-speed char-acteristics and strong anti-disturbance .This article describes the characteristics of permanent magnet brushless DC motors ,perma-nent magnet synchronous motors and AC variable frequency induction motor ,and compares their overall performance .The compari-son results show the permanent magnet brushless DC motor is more suitable for explosion-proof electric drive vehicle in the consider-ation of the mileage and efficiency .%防爆电动车用牵引电机要求过载能力大、低速特性好、抗扰动性强。介绍了永磁无刷直流电机、永磁同步电机和交流感应变频电机的特点，比较了各自的综合性能，得出了从续航里程和高效性来考虑永磁无刷直流电机更适用于防爆电动车用驱动装置的结论。
TMS320F2812 BASED IMPLEMENTATION OF SENSORLESS CONTROL FOR BLDC MOTOR
Directory of Open Access Journals (Sweden)
Mr.R.VIJAYARAJESWARAN
2011-10-01
Full Text Available The paper attempts to develop a novel sensorless control scheme suitable for brushless dc permanent magnet (BLDC-PM motor with a view to elaborate its flexible operating status. It orients its focus to detect the zero crossing instant of the back emf and there from assuage a methodology to control the speed of the motor. The state of the art technology facilitates the use of a powerful processor to realize the strategy in real time. It includes MATLAB simulation to evaluate its performance and seeks the role of DSP (Digital Signal Processor TMS320F2812 controller to validate the same using a prototype. The results illustrate the ability of the proposedtechnique to improve the input power factor in addition to regulating the speed of the motor.
International Nuclear Information System (INIS)
This paper presents a gate driver circuit for the switching devices used in the asymmetrical converter for a switched reluctance machine with reduced number of isolated dc/dc converters. Isolation required in the gate driver circuit of switching devices is indispensable. For the purpose of isolation different arrangements may be used such as pulse transformers. The dc/dc converter for isolation and powering the gate drive circuits is suitable, cheaper in cost and simple to implement. It is also significant that required number of isolation converters is much less than the switches used in converter. In addition, a simple logic circuit has been presented for producing the gate signals at correct phase sequence which is compared with the gated signals directly obtained from the encoder of an existing machine. (author)
Directory of Open Access Journals (Sweden)
Hacene MELLAH
2016-07-01
Full Text Available The objective of this paper is to develop an Artificial Neural Network (ANN model to estimate simultaneously, parameters and state of a brushed DC machine. The proposed ANN estimator is novel in the sense that his estimates simultaneously temperature, speed and rotor resistance based only on the measurement of the voltage and current inputs. Many types of ANN estimators have been designed by a lot of researchers during the last two decades. Each type is designed for a specific application. The thermal behavior of the motor is very slow, which leads to large amounts of data sets. The standard ANN use often Multi-Layer Perceptron (MLP with Levenberg-Marquardt Backpropagation (LMBP, among the limits of LMBP in the case of large number of data, so the use of MLP based on LMBP is no longer valid in our case. As solution, we propose the use of Cascade-Forward Neural Network (CFNN based Bayesian Regulation backpropagation (BRBP. To test our estimator robustness a random white-Gaussian noise has been added to the sets. The proposed estimator is in our viewpoint accurate and robust.
Broad Application of a Reconfigurable Motor Controller Project
National Aeronautics and Space Administration — An ultra-miniature (<50 grams) high-performance brushless-motor controller, code named 'Puck', has been developed by Barrett for Earth-based mobile-manipulation...
Energy Technology Data Exchange (ETDEWEB)
Lindegger, M. [Circle Motor AG, Guemligen (Switzerland); Biner, H. P.; Evequoz, B. [Haute Ecole valaisanne, Sion (Switzerland); Salathe, D. [Hochschule Luzern, Technik und Architektur, Horw (Switzerland)
2008-04-15
Efficient permanent-magnet motors achieve in the area up to 100 kW a higher efficiency than induction machines (standard motors). A simple and fast energy saving option is the exchange of inefficient standard motors. The objective of this work is to install a 3 kW permanent-magnet motor in a standard IEC housing and the optimization of the design for high efficiency. Another objective is the development and the realization of an efficient variable speed control. The efficiency of the motor and the inverter with the control system must be demonstrated by tests. These tasks have been split between Circle Motor AG and the universities of applied sciences of Valais and Lucerne. Considering high-efficiency and low manufacturing cost, a brushless DC solution was adopted. This resulted in an optimum design of the motor and the control system realized with a three-phase rectifier, a buck converter with variable DC voltage, and a three-phase inverter feeding full positive and negative current to two of the legs simultaneously. The maximum measured efficiency is about 96.5% for the inverter and 92% for the motor. With the advantage of the variable speed operation, the efficiency of the realized 3 kW permanent magnet motor together with the control system is always higher than the efficiency of a measured class EFF1 induction motor, even with a direct connection to the grid. The permanent-magnet motor is also about 10 kg lighter. The cost calculation shows that the permanent-magnet motor can be competitive with the induction motor when speed control is desired. This is also the domain with the largest potential for energy savings from variable speed pumps, compressors, fans. (author)
Axial flux permanent magnet brushless machines
Gieras, Jacek F; Kamper, Maarten J
2008-01-01
Axial Flux Permanent Magnet (AFPM) brushless machines are modern electrical machines with a lot of advantages over their conventional counterparts. They are being increasingly used in consumer electronics, public life, instrumentation and automation system, clinical engineering, industrial electromechanical drives, automobile manufacturing industry, electric and hybrid electric vehicles, marine vessels and toys. They are also used in more electric aircrafts and many other applications on larger scale. New applications have also emerged in distributed generation systems (wind turbine generators
Power-Quality Improvement in PFC Bridgeless SEPIC-Fed BLDC Motor Drive
Singh, Bhim; Bist, Vashist
2013-06-01
This article presents a design of a power factor correction (PFC)-based brushless DC (BLDC) motor drive. The speed control of BLDC motor is achieved by controlling the DC link voltage of the voltage source inverter (VSI) feeding BLDC motor using a single voltage sensor. A front-end bridgeless single-ended primary inductance converter (SEPIC) is used for DC link voltage control and PFC operation. A bridgeless SEPIC is designed to operate in discontinuous inductor current mode (DICM) thus utilizing a simple control scheme of voltage follower. An electronic commutation of BLDC motor is used for VSI to operate in a low-frequency operation for reduced switching losses in the VSI. Moreover, a bridgeless topology offers less conduction losses due to absence of diode bridge rectifier for further increasing the efficiency. The proposed BLDC motor drive is designed to operate over a wide range of speed control with an improved power-quality at the AC mains under the recommended international power-quality standards such as IEC 61000-3-2.
Energy Technology Data Exchange (ETDEWEB)
Okui, H. [Osaka polytechnic College, Osaka (Japan); Irie, H. [Osaka Electro-Communication Univ., Osaka (Japan)
1996-08-20
The Two-Quadrant chopper is constructed by using smoothing reactor in common of the step-down chopper and step-up chopper of the DC chopper. Furthermore, since the circuit connected in bridge type by using these two groups has both of positive and negative voltage from DC source and can supplies the current from positive and negative directions for load, it is called in general as the Four-Quadrant chopper. As the Four-Quadrant chopper may supply and regenerate power, it works as power amplifier with high efficiency. In this paper, the speed control circuit of DC servo motor using Four-Quadrant integrated voltage control circuit is described. The speed control circuit is composed of simple circuits of one adder integrator and four hysteresis comparators. The Four-Quadrant speed control circuit has a DC motor speed feedback loop and a voltage feedback loop which connects with AC, it plays the Four-Quadrant speed control without current inspection. The speed control characteristics with no steady state error over four quadrants may be obtained, changing of the quadrant is smooth and transition response is rapid. 9 refs., 11 figs.
Institute of Scientific and Technical Information of China (English)
李春江; 卢铁斌; 章跃进
2011-01-01
Air-gap magnetic field of the direct-drive outer rotor surface-mount permanent magnet fractional slot brushless motor was analyzed with the analytical-numerical method.The domain of the magnetic field was divided into air-gap area and extended slot area.The first boundary condition of the extended slot area was solved with the analytic method of the equivalent air-gap area magnetic field.The permanent magnets are equivalent to the surface current density.The uadrilateral isoparametric element method was used to calculate the magnet field of the extended slot area.The motor was rotating as a fixed step, and the flux of the phase windings was computed according to the magnetic field distribution of each slot.The curve of the induced electromotive force is the derivative to the time of the flux.The calculated result is considered to satisfy the needs in engineering practice by comparing with the test result.It verifies the correctness and effectiveness of the method.%解析数值结合法分析直驱式外转子分数槽表面磁钢永磁无刷电动机气隙磁场.将磁场求解范围划分为气隙区域和扩展槽区域,等效气隙区域磁场解析解得出槽区第一类边界条件,永磁体等效成面电流,用四边形等参元法计算扩展槽区域磁场分布.电机转子以固定角度转动,根据各槽磁场分布计算各相绕组磁链,拟合后对时间求导得到感应电势波形.将计算结果与实验结果比较,符合工程要求,证明了方法的正确性和有效性.
Speed Control of BLDC Motor Using DSP
Directory of Open Access Journals (Sweden)
G.MadhusudhanaRao
2010-03-01
Full Text Available This paper proposed the speed control of brushless dc motor drive employing PWM technique using TMS320F240 digital signal processor. BLDC is widely used because of its high mechanical power density, simplicity and cost effectiveness. The complete controller for BLDC is developed using TMS 320F240 digital signal processor, which has thespecial features for digital motor control. A mathematical model of the drive system is developed to analyze the performance of the proposed drive. The hall sensor signals are used to sense the rotor position. A shunt resistor is used to sense the actual current entering into the motor. These hall signals, phase current sensing signal and the speed command are the input to the DSP. Both the outer velocity control loop and inner current control loop uses PI controller that has been implemented by programming in TMS320F240 DSP processor [8]. According to the input command, feedback command andcontrol algorithm, the PWM pulses for each phase generated by the DSP is given to IGBT driver. The output of the driver is 6 independent PWM pulses that have to be given to the corresponding gate of the six IGBTs power switches used in the three-phase bridge inverter whose output is given to the stator of the BLDC motor. The drive performance is studied for starting, speed reversal and load perturbation.
Motor Drive Technologies for the Power-by-Wire (PBW) Program: Options, Trends and Tradeoffs
Elbuluk, Malik E.; Kankam, M. David
1995-01-01
Power-By-Wire (PBW) is a program involving the replacement of hydraulic and pneumatic systems currently used in aircraft with an all-electric secondary power system. One of the largest loads of the all-electric secondary power system will be the motor loads which include pumps, compressors and Electrical Actuators (EA's). Issues of improved reliability, reduced maintenance and efficiency, among other advantages, are the motivation for replacing the existing aircraft actuators with electrical actuators. An EA system contains four major components. These are the motor, the power electronic converters, the actuator and the control system, including the sensors. This paper is a comparative literature review in motor drive technologies, with a focus on the trends and tradeoffs involved in the selection of a particular motor drive technology. The reported research comprises three motor drive technologies. These are the induction motor (IM), the brushless dc motor (BLDCM) and the switched reluctance motor (SRM). Each of the three drives has the potential for application in the PBW program. Many issues remain to be investigated and compared between the three motor drives, using actual mechanical loads expected in the PBW program.
An Improved Power Quality Based Sheppard-Taylor Converter Fed BLDC Motor Drive
Singh, Bhim; Bist, Vashist
2015-12-01
This paper deals with the design and analysis of a power factor correction based Sheppard-Taylor converter fed brushless dc motor (BLDCM) drive. The speed of the BLDCM is controlled by adjusting the dc link voltage of the voltage source inverter (VSI) feeding BLDCM. Moreover, a low frequency switching of the VSI is used for electronically commutating the BLDCM for reduced switching losses. The Sheppard-Taylor converter is designed to operate in continuous conduction mode to achieve an improved power quality at the ac mains for a wide range of speed control and supply voltage variation. The BLDCM drive is designed and its performance is simulated in a MATLAB/Simulink environment to achieve the power quality indices within the limits of the international power quality standard IEC-61000-3-2.
Shark, new motor design concept for energy saving applied to switched reluctance motor
Energy Technology Data Exchange (ETDEWEB)
Tataru Kjaer, A.M.
2005-07-01
measurement of efficiencies proved that the Shark air gap improves the efficiency of a specified machine by two to four % point with respect to a corresponding cylindrical air gap machine. Furthermore, the two Switched Reluctance Machines are compared with other motor technologies such as Induction Motor and Brushless DC Motor. Analysis of the forces produced in the Shark SRM reveals particular aspects, adding some difficulties to assembly the Shark motor. However, the latest assembly technologies provide solution for a simplified assembly of a Shark machine. Calculations of economical aspects demonstrate a small difference in saving between the Shark Switched Reluctance Motor and the Brushless DC Motor considered in this project. (au)
Application of Full-Order and Simplified EKFs to Sensorless PM Brushless AC Machines
Institute of Scientific and Technical Information of China (English)
Xi Zhu; Zi-Qiang Zhu; David Howe
2005-01-01
This paper em ploys an extended Kalman filter (EKF) to estimate the rotor position and speed of a vector controlled surface-mounted permanent magnet (PM) brushless AC (BLAC) motor from measured terminal voltages and currents only. Both full-order and simplified EKFs are employed and their simulated performance capabilities are compared.Excellent agreement is achieved between estimated and commanded results. The EKF is also employed to identify the stator flux-linkage due to the PMs, which is influenced by temperature variation and magnetic saturation.
A novel PWM scheme to eliminate the diode freewheeling In the Inactive phase in BLDC motor
Institute of Scientific and Technical Information of China (English)
WEI Kun; HU Chang-sheng; ZHANG Zhong-chao
2006-01-01
The brushless DC motor (BLDCM) with trapezoidal electromotive force (back-EMF) waveform is used widely.In principle,when the motor runs in the 120°conduction mode,two of the three phases are active while the other phase is inactive at all times.However,a ripple current occurs in the inactive phase due to the diode freewheeling during the non-commutation period in the traditional pulse width modulation (PWM) methods,which aggravates the torque ripples.A new PWM method is proposed in this paper to eliminate the diode freewheeling during the non-commutation period in the inactive phase.As a result,the torque ripple is suppressed using the proposed method.The simulation and experimental results are demonstrated to verify the validity of the proposed PWM method.
Directory of Open Access Journals (Sweden)
M.Subramanyam
2014-10-01
Full Text Available This paper deals with Speed control of separately excited DC motor using flyback converter with a new non complementary active clamp control method to achieve soft switching and high efficiency for heavy motor load and light load conditions. This is quite attractive for low power application with universal ac inputs, such as external adaptors. With the proposed control technique, the energy in the leakage inductance can be fully recycled. The soft switching can be achieved for the main switch and the absorbed leakage energy is transferred to the output and input side. In the Proposed model the resistive and DC motor is connected to flyback converter and it is simulated with different nominal voltages and rated speed is controlled at different levels for the N-type active clamp flyback converter and P-type active clamp flyback converter respectively. N-type active clamp flyback converter is suitable for high speed variation applications and P-type active clamp flyback converter is suitable for low speed variation applications.
Study of Angular Displacement Servo Control System Based on DC Motor%直流电机的角位移伺服控制系统研究
Institute of Scientific and Technical Information of China (English)
刘海成; 贺亮; 卞玉坤; 姚广俊
2013-01-01
DC motor angular displacement servo control system which takes STM32 microcontroller as the control core is introduced by the paper. The system takes photoelectric encoder as angular displacement sensor, has a motor drive circuit based on PWM and H-bridge, and through digital PID control strategy achieves the angular displacement control based on DC motor. The actual test shows that the system has the features of control precision, good stability and simple structure.%本文介绍一种以STM32微控制器作为控制核心的直流电机角位移伺服控制系统.系统以光电编码器为角位移传感器,还具有基于PWM和H桥的电机驱动电路,并通过数字PID控制策略,实现基于直流电机的角位移控制.实际测试表明,系统具有控制精确、稳定性好和结构简单等特点.
DEFF Research Database (Denmark)
Maheshwari, Ram Krishan; Munk-Nielsen, Stig; Busquets-Monge, S.
2012-01-01
The size of passive components in an adjustable speed drive can be reduced by using small dc-link capacitors. The EMI filter in the drive also consists of passive components. The size of the filter can be reduced by using a three-level inverter, which can have low output voltage distortion. Howev....... Results show that the conducted emission from the three-level inverter is lower than that of the two-level inverter. Thus, a three-level inverter requires a smaller EMI filter in motor drives with small dc-link capacitors.......The size of passive components in an adjustable speed drive can be reduced by using small dc-link capacitors. The EMI filter in the drive also consists of passive components. The size of the filter can be reduced by using a three-level inverter, which can have low output voltage distortion. However......, the shaft voltage, and the conducted emission for the small dc-link capacitor based three-level inverter are compared with that of the two-level inverter operated with space vector PWM strategy. Experimental results for the common mode voltage, the shaft voltage, and the conducted emission are presented...
Energy Technology Data Exchange (ETDEWEB)
Vuckovic, V.; Vukosavic, S. (Electrical Engineering Inst. Nikola Tesla, Viktora Igoa 3, Belgrade, 11000 (Yugoslavia))
1992-01-01
This paper brings out a control algorithm for VSI fed induction motor drives based on the converter DC link current feedback. It is shown that the speed and flux can be controlled over the wide speed and load range quite satisfactorily for simpler drives. The base commands of both the inverter voltage and frequency are proportional to the reference speed, but each of them is further modified by the signals derived from the DC current sensor. The algorithm is based on the equations well known from the vector control theory, and is aimed to obtain the constant rotor flux and proportionality between the electrical torque, the slip frequency and the active component of the stator current. In this way, the problems of slip compensation, Ri compensation and correction of U/f characteristics are solved in the same time. Analytical considerations and computer simulations of the proposed control structure are in close agreement with the experimental results measured on a prototype drive.
Directory of Open Access Journals (Sweden)
Tilmann H. Sander
2010-01-01
Full Text Available Neuronal and vascular responses due to finger movements were synchronously measured using dc-magnetoencephalography (dcMEG and time-resolved near-infrared spectroscopy (trNIRS. The finger movements were monitored with electromyography (EMG. Cortical responses related to the finger movement sequence were extracted by independent component analysis from both the dcMEG and the trNIRS data. The temporal relations between EMG rate, dcMEG, and trNIRS responses were assessed pairwise using the cross-correlation function (CCF, which does not require epoch averaging. A positive lag on a scale of seconds was found for the maximum of the CCF between dcMEG and trNIRS. A zero lag is observed for the CCF between dcMEG and EMG. Additionally this CCF exhibits oscillations at the frequency of individual finger movements. These findings show that the dcMEG with a bandwidth up to 8 Hz records both slow and faster neuronal responses, whereas the vascular response is confirmed to change on a scale of seconds.
Directory of Open Access Journals (Sweden)
Abdelkrim Thameur
2015-01-01
Full Text Available This paper proposes a regulation method of back-to-back connected two-level PWM rectifier-five-level Voltage Source Inverter (VSI in order to reduce the torque ripple in induction motor. First part is dedicated to the presentation of the feedback control of two-level PWM rectifier. In the second part, five-level Neutral Point Clamped (NPC voltage source inverter balancing DC bus algorithm is presented. A theoretical analysis with a complete simulation of the system is presented to prove the excellent performance of the proposed technique.
Simplified Model of Brushless Synchronous Generator for Real Time Simulation
Lopez, M D; Rebollo, E; Blanquez, F R
2015-01-01
This paper presents a simplified model of brushless synchronous machine for saving hardware resources in a real time simulation system. Firstly, a brushless excitation system model is described. Thereafter, the simplified transfer function of an AC exciter and rotating diodes of the brushless excitation system is estimated. Finally, the complete system is simulated, comparing the main generator's voltage with both detailed and simplified excitation systems in several scenarios. These results show the accuracy of the simplified model against the detailed simulation model, resulting on an important hardware resources savings.
Permanent Magnet Brushless DC Motor Position Servo Control System Based on DSP%基于DSP永磁无刷直流电动机位置伺服系统
Institute of Scientific and Technical Information of China (English)
薛迎成; 潘俊民; 潘志扬
2001-01-01
介绍一种基于数字信号处理(DSP)无刷直流电动机位置伺服系统.该系统充分利用了DSP周边端口丰富,运算速度快的特点.使系统硬件结构简单,实验表明,系统具有良好的定位性能.
Institute of Scientific and Technical Information of China (English)
林健; 朱昊; 尤正健
2006-01-01
介绍了可编程片上系统PSoC(Programable System on Chip)的基本工作原理,包括内部资源、主要功能和动态配置方法等,给出了一种以PSoC芯片Cy8c24423为核心的电动自行车调速系统设计方案,分析了系统的硬件构成和软件设计思路.实际使用表明:该系统具有较好的动态性能和稳态精度,功能完善,成本低廉,具备良好的市场应用前景.
Institute of Scientific and Technical Information of China (English)
王刚; 李小民; 李治源; 赵科义
2012-01-01
The increment of velocity will bring about force decline during the electromagnetic launchers and wish to compensate force decline. The effect of traditional methods is worse when the velocity is too great. The mathematical model was established, the calculation formulae of current, force were deduced, and then the influence of velocity, voltage and duty cycle to force was analyzed in detailed. The method of compensation force was given, that the velocity was graded, changing the duty cycle in the same interval and adjust the voltage in the different interval to compensate the decline of force caused by velocity. The simulated annealing algorithm (SA) was introduced and was used to seek for the optimal duty cycle. At last, the simulation results verified the analysis and feasibility of algorithm.%在电磁弹射中,速度的增大会引起推力下降,要进行补偿,以往关于推力补偿的方法因速度过大导致效果较差甚至无法使用.文中建立了数学模型,推导出电流、推力解析式,分析了速度、电压、占空比对推力的影响.提出了对速度划分区间,区间内电压不变,通过提高占空比,区间之间提高电压补偿因速度引起推力下降的方法.介绍了模拟退火算法(SA),并将模拟退火算法用于搜索最优占空比.最后通过仿真,验证了理论分析的正确性及算法的可行性.
Institute of Scientific and Technical Information of China (English)
欧卫斌
2011-01-01
用Cortex-M3内核32位高性能MCU设计一款通用性、控制性较好,性价比较高的BLDCM控制器.根据BLDCM的工作原理和MCU的良好性能进行了详细设计.实现了对BLDCM的转速、电流双闭环控制,通过实验测试了控制器的各项性能.该款基于32位MCU的控制器性能良好,结构紧凑,性价比高,具有较高实用价值.结合应用经验发现,API函数支持下Cortex-M3内核的MCU在硬件控制和软件编程方面较以往单片机等具有优势,基于API函数支持的MCU应用将是未来趋势.%A high generality, better controllable performance and high cost performance BLDCM controller with 32 bit high-performance MCU of Cortex?-M3 kernel was designed according to the working principles of BLDCM and the good performance of LM3S615. The speed and current double closed-loop control of BLDCM was realized after testing the performance of the controller. This controller based on the low power consumption 32 bit MCU has excellent performances, such as compact structure, high cost performance and high practical value. In combination with the application experience, it is found that ARM Cortex?-M3 Processor kernel MCU supported by API function is better than the common single chip microcomputer in the aspects of the hardware control and the software programming. The application of MCU supported by API function has a bright prospect.
永磁无刷直流电机直接转矩控制策略的比较研究%Research of Direct Torque Control of Brushless DC Motor Based on DsPACE
Institute of Scientific and Technical Information of China (English)
董乐; 呼明亮; 邱建琪
2013-01-01
无刷直流电机的直接转矩控制可分为有磁链观测DTC和无磁链观测DTC 2种实现方式.首先搭建有磁链观测DTC和无磁链观测DTC的Matlab/Simulink仿真模型,并进行仿真实验.然后用以dSPACE为控制核心的硬件仿真系统进行了对比实验,比较了有磁链观测DTC和无磁链观测DTC转矩响应、速度响应和相电流波形等存在的差异.
Institute of Scientific and Technical Information of China (English)
齐蓉; 林辉; 陈明
2006-01-01
针对无刷直流电动机的四种单斩PWM调制方式,建立换向过程中电机相电流及电磁转矩的数学模型,研究换向转矩脉动与PWM调制方式的关系.依据无刷直流电动机换向过程的理论分析结果建立仿真模型,比较四种单斩PWM调制方式对换向转矩脉动的不同影响,提出了在换相时加补偿电流可有效抑制换向转矩脉动的实现方法.仿真结果表明采用pwm_on调制方式同时进行PWM脉宽补偿可显著减小换向转矩脉动.
Installation of Hall Position Sensor in Brushless DC Permanent Magnet Motor%永磁无刷直流电机霍尔位置传感器的安装
Institute of Scientific and Technical Information of China (English)
黄海
2009-01-01
永磁无刷直流电机在各行各业的应用越来越广泛.在永磁无刷直流电机中,霍尔位置传感器经常用来测量电机的转子位置和转速.转子位置传感器的安装精度直接关系到永磁无刷直流电机的运行,因此如何安装传感器是非常重要的.本文结合作者多年从事无刷直流电机开发的经验,提出了简便易行的霍尔位置传感器安装方法.
Institute of Scientific and Technical Information of China (English)
刘琨; 肖婵娟
2008-01-01
永磁直线无刷直流电动机作为一种动力源,具有动态性能好、零齿槽效应和零引力、低速性能好等特点,在高精度定位装置上有广泛的应用.基于ANSOFT公司的Maxwell 2D的仿真环境,本文建立了应用于分段供电环形过山车中的永磁直线无刷直流电动机的仿真模型.在所建立模型的基础上,对永磁直线无刷直流电动机的基本特性进行了有限元分析,仿真特性曲线说明了设计参数的可行性,以及利用Maxwell进行电磁场计算的准确性,可以用来指导这种新型电机及其控制系统的设计.
Institute of Scientific and Technical Information of China (English)
李榕; 刘卫国; 马瑞卿; 韩英桃
2007-01-01
本文介绍一种用于电动牙科座椅的稀土永磁无刷直流电机驱动系统,此系统将近年来发展迅速的无刷直流电机与DSP控制技术相结合,采用一片DSP控制器实现对两台稀土永磁无刷直流电机的控制,具有低成本、高性能的特点.
永磁式直流力矩电动机稳速系统设计%Design of Speed Control System of Permanent Magnet DC Torque Motor
Institute of Scientific and Technical Information of China (English)
张晓青; 栗书贤
2001-01-01
In this paper,a new speed control system of permanent magnet DC torque motor is introduced.An IC chip TL494 is utilized to produce PWM pulses in order to control an IGBT device.Thus,the voltage supply of motor can be adjusted by the chopping circuit.Experimental results of the whole system are also provided.%介绍了一种新型的永磁式直流力矩电动机稳速控制系统，采用集成电路芯片TL494输出PWM脉冲来控制IGBT器件，从而实现了对电动机的斩波调压供电，性能稳定可靠。还提供了系统联调的试验结果。
SIMULINK Modelling and Simulation for Permanent Magnet DC Motor%永磁直流电动机的Simulink建模仿真教学
Institute of Scientific and Technical Information of China (English)
曾进辉; 邓建国
2015-01-01
"Electrical machinery and system's computer simulation"is a professional electrical engineering and automation of an important subject, according to the basic structure of the motor establishment of mathematical model and simulation model is a basic skills training. In this paper, the selection of the most simple motor - permanent magnet DC motor for the study, according to his equivalent circuit establishment of the transient mathematical model,using dynamic library module simulation tool Simulink functional modules in MATLAB software,to build the simulation model. Permanent magnet DC motor is given five basic simulation model. Through the example simulation computation, has confirmed the modelling method accuracy and the validity.%"电机及其系统的计算机仿真"是电气工程及其自动化专业的一门重要课程,根据电机的基本结构建立数学模型并构建仿真模型是一种基本功训练. 本文选择最简单的电机-永磁直流电动机作为研究对象,根据他的等效电路建立瞬态数学模型,利用MATLAB软件中的动态仿真工具Simulink模块库中的功能模块,构建其仿真模型.给出了永磁直流电动机最基本的五种仿真模型.通过实例仿真计算,验证了建模方法的正确性和有效性.
A Single-phase Spindle Motor Design for DVD Application
Institute of Scientific and Technical Information of China (English)
2000-01-01
A. single phase brushless spindle motor with innovative design has been deyeloped for application in a DVD drive. The methods used to reduce the cogging torque and to improve the dynamic performance of this new design motor are proposed in this paper. The single phase brushless spindle motor is usually applied for cooling fan, pump and blower before the performance is improved by the reengineering process. The stator configuration and the drive circuit have been remodeled in order to meet the requirements of the spindle motor used in the DVD applications.
Design of a PWM Speed - governing System for DC Motor Based on PLC%基于PLC的直流电机PWM调速系统设计
Institute of Scientific and Technical Information of China (English)
何新霞; 邢瑞军
2011-01-01
设计了基于SIMATIC S7-200 PLC直流电机PWM调速系统.主电路采用双极式可逆PWM变换器,选用集成驱动器M57962L,通过设计其驱动外围电路,实现了对IGBT的导通和关断控制.采用硬件延时电路,防止上、下桥臂直通事故的发生.利用PLC的高速计数功能实现了对电机转速的测量,设计开发了基于PLC的PI控制程序及PWM信号产生程序.从而实现了直流电机的PWM调速,并实现了转速的无静差调节.%The paper presents the design of PWM speed - governing system for DC motor based on S7 - 200 - PLC. The double - polar reversible PWM converter is used and integrated drive electronics M57962 is selected in main circuit. The conduction and switch control of IGBT is realized by designing the peripheral driving circuitry. The delayed circuit is adopted to prevent the shoot -through phenomenon between upper and lower bridge arm in a PWM. Programs for PLC PI control and for PWM signal generation are developed to implement PWM speed- governing for DC motor and floating control on speed.
Directory of Open Access Journals (Sweden)
Ananda Kumar Akkarapaka
2015-01-01
Full Text Available The drop in DC-link voltage of adjustable speed drives (ASD occurs mainly due to the increase in output power demands. This may lead to inefficient operation and eventually the tripping of the drive. This paper presents a Double Space Vector Pulse Width Modulation (DSVPWM technique for boosting and compensating the DC-link voltage of Z-source inverter (ZSI. The DSVPWM technique estimates the required shoot through period of the Z-source inverter to maintain the DC-link voltage constant at the desired level through capacitor voltage control. The DSVPWM can obtain maximum boost at any given modulation index in comparison to simple boost control (SBC method. It also utilizes the dead time more effectively. The speed control of the ZSI fed induction motor drive is done by employing indirect field-oriented (IFO control method. A 32-bit DSP (TMS320F28335 is used to implement the IFOC-DSVPWM method for ZSI. The power structure and the modulation technique are well suited for electric vehicle application.
High Temperature All Silicon-Carbide (SiC) DC Motor Drives for Venus Exploration Vehicles Project
National Aeronautics and Space Administration — This Small Business Innovation Research Phase I project seeks to prove the feasibility of creating high-temperature silicon-carbide (SiC) based motor drives for...
Simulation Model of Brushless Excitation System
Directory of Open Access Journals (Sweden)
Ahmed N.A. Alla
2007-01-01
Full Text Available Excitation system is key element in the dynamic performance of electric power systems, accurate excitation models are of great importance in simulating and investigating the power system transient phenomena. Parameter identification of the Brushless excitation system was presented. First a block diagram for the EXS parameter was proposed based on the documents and maps in the power station. To identify the parameters of this model, a test procedure to obtain step response, was presented. Using the Genetic Algorithm with the Matlab-software it was possible to identify all the necessary parameters of the model. Using the same measured input signals the response from the standard model showed nearly the same behavior as the excitation system.
The DC Motor Control System Based on Wireless Remote Control Technology%无线电遥控式直流电机控制系统
Institute of Scientific and Technical Information of China (English)
余翔翔; 陈德传; 郑忠杰
2013-01-01
The motor actuating unit based on wireless remote control has a vast application prospect .There-fore, this paper proposes a wireless remote DC motor control system .Take the embedded microprocessor STM32F103 and the RF transceiver CC1101 as the core for the motor control system , and use the combination of the MOSFET and the relay for the motor control circuit;take the ultra-low-power MSP430 series micropro-cessor and the CC 1101 as the core for the wireless remote control of the motor system .This system has the characteristics of simple structure , perfect control and protection functions , and high universality .%无线电遥控式电机执行装置具有广阔的应用前景。该文提出一种无线电遥控式的直流电机控制系统，电机控制系统以嵌入式微处理器STM32F103与射频收发器CC1101为控制核心，并采用基于脉宽调制的MOSFET与继电器相结合的电机调速与正、反转控制电路；而无线遥控器以超低功耗的MSP430系列单片机与CC1101为核心，以实现对电机系统的无线遥控。该系统结构简单、控制与保护功能完善，通用性好。
三相直流电机伺服系统设计%Design of Three-phase DC Motor Servo System
Institute of Scientific and Technical Information of China (English)
陈志佳; 孙书鹰; 张炜栋
2012-01-01
In order to implement highly precise and real-time tracking for the objects, the DC motor servo system has been designed. The system is composed of the embedded microprocessor STM32F1O3 as the kernel, and the 3-phase DC hrushless motor equipped with Hall commutating sensor as servo motor. In addition, the fuzzy control scheme that is combination of incremental integral separation PID control and fuzzy control is adopted. The experimental test through emulated air-tracking shows that the system is able to reach higher dynamic tracking accuracy and faster response speed, and features stable and smooth performance. It does implement highly precise real-time tracking, and the design meets expected goal.%为实现对高精度实时目标的跟踪,设计了直流电机伺服系统.该伺服系统以STM32F103嵌入式微处理器为控制核心,以带有霍尔换向传感器的三相直流无刷电机作为伺服电机,并采用增量型积分分离式PID控制与模糊控制相结合的模糊PID控制策略.模拟对空跟踪试验测试表明,该系统具有较高的动态跟踪精度和较快的响应速度,平稳性好,实现了高精度实时跟踪,达到了设计的预期目的.
Handbook on linear motor application
International Nuclear Information System (INIS)
This book guides the application for Linear motor. It lists classification and speciality of Linear Motor, terms of linear-induction motor, principle of the Motor, types on one-side linear-induction motor, bilateral linear-induction motor, linear-DC Motor on basic of the motor, linear-DC Motor for moving-coil type, linear-DC motor for permanent-magnet moving type, linear-DC motor for electricity non-utility type, linear-pulse motor for variable motor, linear-pulse motor for permanent magneto type, linear-vibration actuator, linear-vibration actuator for moving-coil type, linear synchronous motor, linear electromagnetic motor, linear electromagnetic solenoid, technical organization and magnetic levitation and linear motor and sensor.
Analysis of Vibration and Acoustic Noise in Permanent Magnet Motors.
Hwang, Sangmoon
. The effect of various design parameters on the output torque and torque ripple are discussed. Design parameters include winding patterns, magnetization direction, magnet arc length, number of segments in poles and magnet pole shaping. New designs of trapezoidal BEMF motors are proposed to reduce the electromagnetic torque ripple. Magnet stepping and magnet edge shaping with reduced arc length, significantly reduce torque ripple, with minimal sacrifice of the maximum output torque. Acoustic noise of electromagnetic origin is investigated using a magnetic frame which emulates a DC motor. The driving electromagnetic force is calculated using finite element analysis and the resulting vibration and acoustic noise is measured. Acoustic noise of purely electromagnetic origin was also tested with a DC brushless motor to confirm the results of the magnetic frame. The mechanism of noise generation in a DC motor is a quasi-static response of a stator not only at the fundamental frequency but also at higher harmonic frequencies of alternating switched DC, which is a current characteristic of a DC motor. Noise generation is significantly aggravated when some of those harmonics are close to the resonant frequencies of the stator. Therefore, acoustic noise is highly dependent upon the excitation current shape, as higher harmonics may match with resonant frequencies of the stator.
Noise Source Identification of Small Fan-BLDC Motor System for Refrigerators
Directory of Open Access Journals (Sweden)
Yong-Han Kim
2006-01-01
Full Text Available Noise levels in household appliances are increasingly attracting attention from manufacturers and customers. Legislation is becoming more severe on acceptable noise levels and low noise is a major marketing point for many products. The latest trend in the refrigerator manufacturing industry is to use brushless DC (BLDC motors instead of induction motors in order to reduce energy consumption and noise radiation. However, cogging torque from BLDC motor is an undesirable effect that prevents the smooth rotation of the rotor and results in noise. This paper presents a practical approach for identifying the source of excessive noise in the small fan-motor system for household refrigerators. The source is presumed to a mechanical resonance excited by torque ripple of the BLDC motor. By using finite element analysis, natural frequencies and mode shapes of the rotating part of the system are obtained and they are compared with experimental mode shapes obtained by electronic torsional excitation test which uses BLDC motor itself as an exciter. Two experimental validations are carried out to confirm the reduction of excessive noise.
A Novel BLDC-Like DTC Control Technique for Induction Motors
Directory of Open Access Journals (Sweden)
Andrea Rossi
2012-01-01
Full Text Available DC brushless motors are widely adopted for their simplicity of control, even in sensorless configuration, and their high torque density. On the other hand, induction motors are very economical due to the absence of permanent magnets; for the same reason they can easily be driven in the flux-weakening region to attain a wide speed range. Nevertheless, high dynamic induction motors drives, based on field-oriented (FOC or predictive control, require large amounts of computing power and are rather sensitive to motor parameter variations. This paper presents a simple DTC induction motor control algorithm based on a well-known BLDC control technique, which allows to realize a high dynamic induction motor speed control with wide speed range. The firmware implementation is very compact and occupies a low amount of program memory, comparable to volt-per-Hertz- (V/f- based control algorithms. The novel control algorithm presents also good performance and low current ripple and can be implemented on a low-cost motion control DSP without resorting to high-frequency PWM.
Interfacing the septa movement (DC motors) equipment to the PS control system and the MIL1553 bus
Dehavay, Claude
1995-01-01
Continuing the rejuvenation of the PS Control system , this application replaces the Single Transceiver Hybrid used to interface the Septa Movement Fquipment by a G64 system connected to the VME crate via the MIL1553 bus. This note explains the G64 hardware interface and details the standard message as defined in the Control Protocole for Power Converter, RF and Stepping Motor equipment.
Directory of Open Access Journals (Sweden)
M. A. Inayathullaah
2014-01-01
Full Text Available In order to achieve high torque at low power with high efficiency, a new five-phase permanent magnet brushless DC (PMBLDC motor design was analyzed and optimized. A similar three-phase motor having the same D/L ratio (inner diameter (D and length of the stator (L is compared for maximum torque and torque ripple of the designed five-phase PMBLDC motor. Maxwell software was used to build finite element simulation model of the motor. The internal complicated magnetic field distribution and dynamic performance simulation were obtained in different positions. No load and load characteristics of the five-phase PMBLDC motor were simulated, and the power consumption of materials was computed. The conformity of the final simulation results indicates that this method can be used to provide a theoretical basis for further optimal design of this new type of motor with its drive so as to improve the starting torque and reduce torque ripple of the motor.
无位置传感器电力助动车的研究%Research to motor bike with positionless sensors
Institute of Scientific and Technical Information of China (English)
俞鹤
2001-01-01
针对电力助动车直接安装位置传感器结构复杂，价格昂贵，可靠性低的弱点。讨论了无位置传感器无刷直流电动机的调速系统，并利用反电动势检测技术实现换相控制。%According to the deficiencies in the structure complexity,expensive costs and lower reliability of the motor bike with sensors directly posited,speed control system of the brushless DC motor with positionless sensors is discussed.By employing technology of detection for reverse voltage,this paper presents a way to realize the control of changing phase.
Interfacing the septa movement (DC motor) equipment to the PS control system and the MIL1553 bus
Dehavay, Claude
1993-01-01
Continuing the rejuvenation of the PS Control system , it is planned to replace the Single Transceiver Hybrid used to interface the Septa Movement Equipment by a G64 system connected to the VME crate via the MIL1553 bus. This note explains the G64 hardware interface and details the standard message as defined in the Control Protocole for Power Converter, RF and Stepping Motor equipment.
Directory of Open Access Journals (Sweden)
Safaa M. Z. Al-Ubaidi
2012-06-01
Full Text Available This paper presents an implementation of conventional PID (CPID controller using Ziegler-Nichols rules and fuzzy PD (FPD controller for position servo motor control based on Lab View (Laboratory Virtual Instrument Engineering Workbench Environment through Data Acquisition (DAQ Device PCI- 6521 of National Instrument's and Data Acquisition Accessory Board Model (CB-68LP.CPID controller is perhaps the most well-known and most widely used in industrial applications. However, it has been known that CPID controller generally don’t work well for non-linear systems, higher order and time-delayed linear system and particularly complex and vague system. To overcome these difficulties, this paper proposes to use the FPD controller for a servo motor system instead of CPID. The parameters of servo motor used are completely unknown. The FPD structure has two-input single-output and fairly similar characteristic to its conventional counterpart and provides good performance. Simple rules base are used for FPD (nine rules only. Performance evaluation was carried out via a comparison study for the proposed control scheme and other existing control scheme, such as CPID controller. The critical point for this experiment on position system is a steady state error and settling time. The performance showing that the FPD has less settling time and zero steady state error over its CPID. The algorithms of FPD and CPID controllers are implemented using PID, Fuzzy Logic and simulation toolkits of the Lab View environment.
Directory of Open Access Journals (Sweden)
Yee-Pien Yang
2015-12-01
Full Text Available This paper proposes an optimal design of a middle motor integrated into a mid-drive unit for pedal electric cycles. This middle motor is an axial-flux permanent magnet brushless DC motor with a stator plate. Facing this plate is a rotor plate that acts as an eccentric component of a cycloidal reducer next to the stator. Both the middle motor and cycloidal reducer are easily installed on the same axle of the bike crankset. In the preliminary design, driving requirements are used to make the middle motor specifications. The numbers of stator slots and magnet poles on the rotor were chosen to achieve the best winding factor, and the winding layout was determined accordingly. A one-dimensional magnetic circuit model of the middle motor was built, and its shape was optimized utilizing a multifunctional optimization system tool. Finally, the resulting design was verified and refined by a finite element analysis. A prototype of the middle motor was fabricated with a stator made of a soft magnetic composite and integrated with a cycloidal reducer. Experimental results show that the motor has a sinusoidal back electromotive force. Additionally, it is easily controlled by sinusoidal currents with acceptable torque and speed curves.
A Novel Motor-Speed-Regulation Method
Directory of Open Access Journals (Sweden)
Huang Zhou
2016-01-01
Full Text Available The traditional doubly-fed motor has less reliability because it needs carbon brushes and sliding rings which are not highly reliable. The brushless doubly-fed machine costs a lot for its framework requires special designing and processing. To overcome the disadvantages of the two kinds of motors, this paper focuses on a novel method of motor speed regulation which is based on rotating feeding. The motor speed changing around its rated speed can be realized based on the method without any carbon brush or sliding ring on the prosaic electrical motors. On the basis of the full controlled thyristor rectifying bridge structure, the basic idea is introduced; the advantages and disadvantages of this method are analyzed. This kind of systems can replace the brushed or brushless double-fed systems. They are very suitable for driving fans or pumps, or power-generating systems with variable speed constant frequency such as wind power or water power generating systems.
GENETIC BASED PLUS INTEGRAL CONTROLLER FOR PMBLDC MOTOR CONTROL USING RESONANT POLE INVERTER
Directory of Open Access Journals (Sweden)
Muruganantham
2012-01-01
Full Text Available Permanent Magnet Brushless DC (PMBLDC motor drives are increasingly popular in industrial applications due to rapid progress of technologies in power electronics and the growing demand for energy saving. The increasing demand of energy saving from society is the external force for the development of PMBLDC motor drives. It is however driven by a hard-switching Pulse Width Modulation (PWM inverter, which has low switching frequency, high switching loss, high Electro-Magnetic Interference (EMI, high acoustic noise and low efficiency, etc. To solve these problems of the hard-switching inverter, many soft-switching inverters have been designed in the past. Unfortunately, high device voltage stress, large dc link voltage ripples, complex control scheme and so on are noticed in the soft-switching inverters. This study introduces a novel genetic-proportional Plus Integral (PI controller based resonant pole inverter using transformer, which can generate dc link voltage notches during chopping which minimize the drawbacks of soft-switching. Hence all switches work in zero-voltage switching condition. The performance of the genetic-based PI controller is compared with conventional PI controller. The experimental results show that the genetic-based PI controller renders a better transient response than the conventional PI controller resulting in negligible overshoot, smaller settling time and rise time. Moreover the proposed controller provides low torque ripples and high starting torque. Both simulation and experimental results are presented to show the superiority of the proposed GA-PI controller based resonant pole inverter.
Torque analysis for double-stator permanent-magnet motor
Institute of Scientific and Technical Information of China (English)
柴凤; 程树康; 崔淑梅
2002-01-01
In addition to the characteristics of a conventional motor, a novel direct-drive double-stator perma-nent-magnet brushless motor proposed can operate in the state of either a generator or a motor as appropriate.Through numerical calculation and analysis, the output torque of double-stator permanent-magnet brushless motor of the same volume as the traditional machine is discussed, and the reduction of torque ripple by using the structure features of this motor is investigated. The results indicate that lower torque ripple under the condition of ideal effective torque can be obtained by the rational design of motor. The prototype motors tested show that this kind of motor structure has a higher power density.
Speed control of DC motor based on exact linearization%精确线性化电动机转速控制
Institute of Scientific and Technical Information of China (English)
史晓阳; 鲁芳; 刘艳萍
2012-01-01
基于精确线性化方法．设计了两种他励直流电动机转速非线性控制器，并对其性能进行了比较。从他励直流电动机的数学模型出发，运用微分几何理论，讨论给出了他励直流电动机可进行状态反馈线性化的条件。在此基础上，通过选择不同输出函数，设计了状态反馈控制器和输出反馈控制器，并研究了这两种控制器的动态响应特性、抗干扰能力和稳定运行区域。结果表明，对于他励直流电动机数学模型而言，输出反馈线性化控{l；6器相对于状态反馈线性化控制器．具有控制器结构简单、运行稳定、动态性能好、抗干扰能力强等优点。%Based on the feedback linearization method, two different speed nonlinear controllers of are designed by choosing different output functions, and its performance are studied. Based on the mathematical model of separately excited DC motor and differential geometry theory, state feedback linearization conditions are given. State feedback controller and output feedback controller are designed, and the dynamic response characteristics, the anti-interference ability and stable operation areas are discussed of the two controllers. The results show that, for separately excited DC motor mathematical model, compared to the state feedback hnearization controller, the output feedback linearization controller has a more simple structure, better stable operation and dynamic performance, stronger anti-interference capability, et al.
Control strategies for brushless doubly fed reluctance machines
Jovanovic, Milutin; Betz, Robert
2001-01-01
Paper presents the development and results of comprehensive comparative analysis of different vector control strategies for performance optimisation of the BDFRM being considered as a viable cost-effective brushless alternative to traditional brush and less reliable solutions in applications with limited variable speed ranges (such as wind turbines). Australian Research Council and EPSRC projects.
A Hybrid Design Approach for Data Acquisition and Real Time Control of a Universal Motor Test Bench
Directory of Open Access Journals (Sweden)
Stamen Gadzhanov
2012-12-01
Full Text Available The recent advances in technology have led to the development of a number of laboratories for motion control throughout the world. The increased Internet bandwidth allowed many of them to be used remotely by distant users. The benefit of using a motorised linear stage in the laboratory test bench is that it represents various industrial applications for precise position control. This paper presents a novel comprehensive flexible motion platform that can be a base for remote experimentations with Brushless DC (BLDC/Permanent Magnet Synchronous motors (PMSM and drives, single/multiple axes flexible mechanical systems with friction/backlash uncertainties, inverted pendulums, etc. A LabVIEW software environment has been utilised to gain from the advantages of the virtual instrumentation representation and data acquisition capabilities.
Institute of Scientific and Technical Information of China (English)
李楠; 陈韶飞; 薛方正; 许威
2011-01-01
The paper discusses the characteristic of the robot motion control algorithm, which has important influence to the road-holding of robot. After analyzing the mathematical model and control system, the human-simulated intelligent control (HSIC) is applied to the robot DC-motor motion control system. Improved Genetic Algorithm(IGA) is used to optimize the parameters for HSIC.Compared with PID controller, the HSIC controller has more effective control on motor, improves the performance of robot.%讨论了当前足球机器人运动控制系统的控制算法对足球机器人运动性能的影响.在分析了足球机器人运动控制系统组成和电机数学模型的基础上,对足球机器人运动控制器采用多模态控制的仿人智能控制(Human-Simulated Intelligent Control,HSIC)算法,利用改进的遗传算法(Improved Genetic Algorithm,IGA)对仿人智能控制器参数进行优化.通过与目前普遍采用的常规PID控制器作对比实验,表明采用IGA参数整定后的HSIC控制器对电机具有更好的控制品质,并改善了足球机器人的运动性能.
Dhere, Neelkanth G.; Schleith, Susan
2014-10-01
Improvement of energy efficiency in the SunSmart Schools Emergency Shelters requires new methods for optimizing the energy consumption within the shelters. One major limitation in current systems is the requirement of converting direct current (DC) power generated from the PV array into alternating current (AC) power which is distributed throughout the shelters. Oftentimes, this AC power is then converted back to DC to run certain appliances throughout the shelters resulting in a significant waste of energy due to DC to AC and then again AC to DC conversion. This paper seeks to extract the maximum value out of PV systems by directly powering essential load components within the shelters that already run on DC power without the use of an inverter and above all to make the system reliable and durable. Furthermore, additional DC applications such as LED lighting, televisions, computers and fans operated with DC brushless motors will be installed as replacements to traditional devices in order to improve efficiency and reduce energy consumption. Cost of energy storage technologies continue to decline as new technologies scale up and new incentives are put in place. This will provide a cost effective way to stabilize the energy generation of a PV system as well as to provide continuous energy during night hours. It is planned to develop a pilot program of an integrated system that can provide uninterrupted DC power to essential base load appliances (heating, cooling, lighting, etc.) at the Florida Solar Energy Center (FSEC) command center for disaster management. PV arrays are proposed to be installed on energy efficient test houses at FSEC as well as at private homes having PV arrays where the owners volunteer to participate in the program. It is also planned to monitor the performance of the PV arrays and functioning of the appliances with the aim to improve their reliability and durability. After a successful demonstration of the hybrid DC microgrid based emergency
Directory of Open Access Journals (Sweden)
N. Nishiyama
2016-05-01
Full Text Available Recently updated nanocrystalline soft magnetic Fe-Co-Si-B-P-Cu alloys “NANOMET®” exhibit high saturation magnetic flux density (Bs > 1.8 T, low coercivity (Hc < 10 A/m and low core loss (W1.7/50 ∼ 0.4 W/kg even in a ribbon form with a thickness of up to 40 μm. By utilize excellent magnetic softness, several products such as motors or transformers for electrical appliances are now under developing by industry-academia collaboration. In particular, it is found that a brushless DC motor using NANOMET® core exhibited remarkable improvement in energy consumption. The prototype motor with an outer core diameter of 70 mm and a core thickness of 50 mm was constructed using laminated nano-crystallized NANOMET® ribbons. Core-loss for the constructed motor was improved from 1.4 W to 0.4 W only by replacing the non-oriented Si-steel core with NANOMET® one. The overall motor efficiency is evaluated to be 3% improvement. In this work, the relation between processing and resulting magnetic properties will be presented. In addition, feasibility for commercialization will also be discussed.
Design of PLC Program of DC Motor Speed Regulation Based on PID Algorithm%基于PID算法的直流电机调速的PLC程序设计
Institute of Scientific and Technical Information of China (English)
王海涛; 吴钦木; 韦书龙; 刘江宁
2012-01-01
Both ends of armature voltage of DC motor are used as feedback terminal. The Siemens $7-200 PLC is used as controller. The PID loop control instruction is used to make calculation. The PWM wave is output and the DC motor speed regulation is implemented.%以直流电机电枢两端电压作为反馈，采用西门子S7-200PLC作为控制器，利用其PID回路控制指令进行计算，然后输出PWM波，达到对直流电机转速进行调节的目的。
Institute of Scientific and Technical Information of China (English)
王宗培; 陈敏祥
2012-01-01
电动机的电枢主电路包括:电枢绕组电路和电源二部分,属运动控制类的各种交流电动机,具有多相交流电枢绕组电路和逆变器供电的电源.与传统直流电动机原理一样的New DCM,具有直流的电枢绕组电路,通过电子换向器与直流电源相连.逆变器和电子换向器都是功率开关管的桥式电路,硬件电路上不易区分,容易混淆.本文用实例说明电子换向器不是逆变器,换向器构筑直流电枢绕组电路的独特功能,使得它与交流电枢绕组电路完全不同,电枢绕组电感对电动机运行性能的影响也随之不同.%The motor armature main circuit including: the armature winding circuit and power supply, all kinds of motion-control AC motors have the multiphase ac armature winding circuit and inverter power supply. The New DCM , with same principles of the traditional DC machines, has the DC armature winding circuit connected to DC power through electronic commutator. Inverter and electronic commutator is not easy to distinguish from hardware circuit structure, easy to confuse. This paper demonstrates the electronic commutator not inverter, the unique functions of the electronic commutator is to make the armature winding circuit as DC circuit, therefore , the armature winding circuits between New DCM and AC motor are completely different, the influences of the armature winding inductance to motor performance are different , too.
Institute of Scientific and Technical Information of China (English)
李尉; 宋保维; 胡欲立
2011-01-01
Based on the Magnet software, a leakage magnetic flux of a permanent magnet DC motor for the propulsion of a certain underwater vehicle is numerically simulated by a finite element method, and the numerical relation between the leakage magnetic strength and the distance of the DC motor is obtained. Furthermore,a good method is presented to analyze a disadvantageous influence of the leakage magnetic flux of a permanent magnet DC motor for the propulsion of underwater vehicles to their nearby electronic instruments and equipments.%基于Magnet软件,对某型水下航行器推进用永磁直流电机漏磁场进行了有限元数值仿真,得到了电机漏磁场强度与电机距离之间的数值关系,也为分析水下航行器推进电机漏磁场对其附近电子仪器设备带来的不利影响,提出了一个良好的方法.
Control aspects of the brushless doubly-fed machine
Lauw, H. K.; Krishnan, S.
1990-09-01
This report covers the investigations into the control aspects of a variable-speed generation (VSG) system using a brushless double-fed generator excited by a series-resonant converter. The brushless double-fed machine comprises two sets of stator 3-phase systems which are designed with common windings. The rotor is a cage rotor resembling the low-cost and robust squirrel cage of a conventional induction machine. The system was actually designed and set up in the Energy Laboratory of the Department of Electrical and Computer Engineering at Oregon State University. The series-resonant converter designed to achieve effective control for variable-speed generation with the brushless doubly-fed generator was adequate in terms of required time response and regulation as well as in providing for adequate power quality. The three elements of the VSG controller, i.e., voltage or reactive power controller, the efficiency maximizer and the stabilizer, could be designed using conventional microprocessor elements with a processing time well within the time period required for sampling the variables involved with executing the control tasks. The report treats in detail the stability problem encountered in running the machine at certain speed regions, even if requirements for steady-state stability are satisfied. In this unstable region, shut down of the VSG system is necessary unless proper stabilization controls are provided for. The associated measures to be taken are presented.
Development of Ulta-Efficient Electric Motors
Energy Technology Data Exchange (ETDEWEB)
Shoykhet, B. (Baldor Comp.); Schiferl, R. (Baldor Comp.); Duckworth, R.; Rey, C.M.; Schwenterly, S.W.; Gouge, M.J.
2008-05-01
. Between the HTS field winding and the physical air gap is a series of concentric cylinders that act as vacuum insulation space walls as well as conducting paths for induced currents to flow in order to shield the HTS winding and the rotor cold space from time dependent fields. These time dependent fields may be caused by rotor hunting, during a change in motor load, or by non-fundamental component voltages and currents applied by the inverter. These motors are variable speed controlled by the inverter. Common large motor utility and industrial applications are pump and fan drives that are best suited by a variable speed motor. Inverter control of the HTS motor eliminates the need to design the rotor for line starting, which would dump a large amount of heat into the rotor that would then heavily tax the cryogenic cooling system. The field winding is fed by a brushless exciter that provides DC current to the HTS rotor winding. The stator winding is air or water cooled. Technical and commercial hurdles to industrial HTS motor product introduction and customer acceptance include (1) the high cost of HTS wire and the cryogenic cooling system components, (2) customer concerns about reliability of HTS motors, and (3) the ability to attain the loss reduction potential of large HTS motors. Reliance Electric has demonstrated a number of HTS based electric motors up to a 1000 hp, variable speed synchronous motor with an HTS field winding in the year 2000. In 2001 this motor was tested to 1600 hp with a sinusoidal (constant frequency) supply. Figure 1-2 shows the HTS motor on the dynamometer test stand in the Reliance Electric test lab. The extensive test program of the 1000 hp motor successfully demonstrated the technical feasibility of large HTS motors and the basic technologies involved, however the test results did indicate the need for design refinements. In addition, test results served to identify other more fundamental critical technology issues, and revealed the need to
基于 Matlab 的直流电机控制系统硬件在环设计%HIL Design of DC Motor Control System Based on Matlab
Institute of Scientific and Technical Information of China (English)
朱虎; 林立; 刘正奇
2015-01-01
In order to save time for developer using C/C++language source code, as well as improve the effectiveness of DSP bipolar PWM DC motor control, studied automatic code generation based on Matlab/Simulink for TI C2000 DSP platform.The control model built in Matlab/Simulink converts to real-time con-trol code control DC motors through RTW ( Real_Time Workshop) conversion tools and realize the control of DC motor PWM bipolar control system on TMS320F2812 platform, the motor is running smoothly.Experi-mental results show that the Hardware-In-Loop ( HIL) simulation technology effectively shorten the product development cycle.%针对开发人员在利用C／C＋＋语言编写源代码时浪费大量时间的问题，同时为提高DSP对直流电机PWM双极性控制的有效性，研究了基于Matlab／Simulink平台下TI C2000DSP代码自动生成的方法。在Matlab／Simulink环境下搭建控制模型，通过RTW（ Real＿Time Workshop）工具转换成实时控制代码控制直流电机。并利用此方法在TMS320F2812开发板上实现了对直流电机PWM双极性控制系统的控制，电机平稳运行。实验验证了硬件在环半实物仿真技术有效地缩短产品的开发周期。
Directory of Open Access Journals (Sweden)
Yi-Chang Wu
2013-01-01
Full Text Available The aim of this paper is to present an innovative electromechanical device which integrates a brushless DC (BLDC hub motor with a speed-changing wheel hub stored on the rear wheel of an electric bicycle. It combines a power source and a speed-changing mechanism to simultaneously provide functions of power generation and transmission for electric bicycles. As part of the proposed integrated device, the wheel hub consists of a basic planetary gear train providing three forward speeds including a low-speed gear, a direct drive, and a high-speed gear. Each gear is manually controlled by the shift control sleeve to selectively engage or disengage four pawl-and-ratchet clutches based on its clutching sequence table. The number of gear teeth of each gear element of the wheel hub is synthesized. The BLDC hub motor is an exterior-rotor-type permanent-magnet synchronous motor. Two-dimensional finite-element analysis (FEA software is employed to facilitate the motor design and performance analysis. An analysis of the power transmission path at each gear is provided to verify the validity of the proposed design. The results of this work are beneficial to the embodiment, design, and development of novel electromechanical devices for the power and transmission systems of electric bicycles.
Analysis of Variable MLI Based BLDC Motor Drive with PFC for Reduced Torque Ripples
Directory of Open Access Journals (Sweden)
V. Ramu,
2015-11-01
Full Text Available This paper presents a power factor corrected (PFC bridgeless (BL buck–boost converter-fed brushless direct current (BLDC motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI is used with a single voltage sensor. This facilitates the operation of VSI at fundamental frequency switching by using the electronic commutation of the BLDC motor which offers reduced switching losses. A BL configuration of the buck–boost converter is proposed which offers the elimination of the diode bridge rectifier, thus reducing the conduction losses associated with it. A PFC BL buck–boost converter is designed to operate in discontinuous inductor current mode (DICM to provide an inherent PFC at ac mains. The performance of the proposed drive is evaluated over a wide range of speed control and varying supply voltages (universal ac mains at 90–265 V with improved power quality at ac mains. The obtained power quality indices are within the acceptable limits of international power quality standards such as the IEC 61000-3-2. The performance of the proposed drive is simulated in MATLAB/Simulink environment, and the obtained results are validated experimentally on a developed prototype of the drive.
一种双向短行程永磁直线直流电机%A Bi-directional Short Stroke Permanent Magnet Linear DC Motor
Institute of Scientific and Technical Information of China (English)
杜志强; 沈文杰; 艾武; 金振荣
2011-01-01
阐述了一种双向短行程永磁动圈式直线直流电动机的结构及特点,直线电机采用双环形磁钢、直线轴承滚动副支撑结构形式,径向磁场中的动圈固接在轴上并被两个刚度相同的预压弹簧平衡,导向机构阻止动圈周向转动,带有分辨率为1 μm光栅尺,设计的行程范围为±5 mm.给出了样机的主要参数,并对样机进行了试验研究,结果表明直线电机输入电流与电磁力呈线性关系.在控制信号频率为30 Hz时,峰值电流为±2.56 A,峰值推力可达±30.9 N,最大速度可达±0.86 m/s,最大加速度可达±16.5 g.%The structure and features of a bi-directional short stroke linear DC motor with permanent magnets were presented. The magnetic field was produced by the two concentric ring permanent magnets embedded on the stator. The moving coil mounted on the shaft was a tubular coil situated within a radially oriented magnetic field and balanced by the two opposing forces generated by two springs along with the central axis and supported by the two linear bearings. The linear guide prevented the moving coil from rotating around on the central axis and carries with the linear optical encoder of 1 (xm resolution. The required controlled travel was limited in a ±5 mm displacement range. The prototype specifications were given. The experimental results show that between the electromagnetic force and the coil electric current exists a linear relation. When the frequency of control command is the 30Hz sine wave, the peak current, the peak force, the max velocity and the max acceleration are, respectively, ±2. 56A, ±30. 9N, ±0. 86m/s and ± 16. 5g.
FreedomCAR Advanced Traction Drive Motor Development Phase I
Energy Technology Data Exchange (ETDEWEB)
Ley, Josh (UQM Technologies, Inc.); Lutz, Jon (UQM Technologies, Inc.)
2006-09-01
The overall objective of this program is to design and develop an advanced traction motor that will meet the FreedomCAR and Vehicle Technologies (FCVT) 2010 goals and the traction motor technical targets. The motor specifications are given in Section 1.3. Other goals of the program include providing a cost study to ensure the motor can be developed within the cost targets needed for the automotive industry. The program has focused on using materials that are both high performance and low costs such that the performance can be met and cost targets are achieved. In addition, the motor technologies and machine design features must be compatible with high volume manufacturing and able to provide high reliability, efficiency, and ruggedness while simultaneously reducing weight and volume. Weight and volume reduction will become a major factor in reducing cost, material cost being the most significant part of manufacturing cost at high volume. Many motor technology categories have been considered in the past and present for traction drive applications, including: brushed direct current (DC), PM (PM) brushless dc (BLDC), alternating current (AC) induction, switched reluctance and synchronous reluctance machines. Of these machine technologies, PM BLDC has consistently demonstrated an advantage in terms of power density and efficiency. As rare earth magnet cost has declined, total cost may also be reduced over the other technologies. Of the many different configurations of PM BLDC machines, those which incorporate power production utilizing both magnetic torque as well as reluctance torque appear to have the most promise for traction applications. There are many different PM BLDC machine configurations which employ both of these torque producing mechanisms; however, most would fall into one of two categories--some use weaker magnets and rely more heavily on reluctance torque (reluctance-dominant PM machines), others use strong PMs and supplement with reluctance torque
Institute of Scientific and Technical Information of China (English)
王平; 高明华; 马坤; 公维帅; 荣伟
2012-01-01
Many programmable logic controllers (PLC) have integrated high-speed pulse output functions, which provide convenience for motion control. But high-speed pulse output of fixed duty cycle caused difficulties when PLC directly applied to the PWM speed regulation of DC servo motor. Took full use of PLC s highspeed pulse output selected the driver chip L298N, and proposed the method of adjusting the frequency to change speed at fixed duty cycle without extra external devices and applied to production line of IC card. Experimental result shows the DC servo motor speed and the pulse output frequency is linear relationship. The method can achieve the precise speed regulation of DC servo motor.%现在很多可编程控制器(PLC)中集成了高速脉冲输出功能,这为运动控制提供了方便,但是高速脉冲输出的占空比一般固定不变,这使PLC直接应用到直流伺服电机调速系统中出现了困难.选用L298N驱动芯片,充分利用PLC高速脉冲输出功能,在不增加外围器件情况下,提出定占空比调频调速的方法,并将其应用到IC卡生产线.实际应用结果表明直流伺服电机的转速与PLC脉冲输出频率成线性关系,定占空比调频能够在一定条件下实现电机的精确调速.
Hamilton, H. B.; Strangas, E.
1980-01-01
The time dependent solution of the magnetic field is introduced as a method for accounting for the variation, in time, of the machine parameters in predicting and analyzing the performance of the electrical machines. The method of time dependent finite element was used in combination with an also time dependent construction of a grid for the air gap region. The Maxwell stress tensor was used to calculate the airgap torque from the magnetic vector potential distribution. Incremental inductances were defined and calculated as functions of time, depending on eddy currents and saturation. The currents in all the machine circuits were calculated in the time domain based on these inductances, which were continuously updated. The method was applied to a chopper controlled DC series motor used for electric vehicle drive, and to a salient pole sychronous motor with damper bars. Simulation results were compared to experimentally obtained ones.
关于直流力矩电机电枢灌封后胶层开裂问题的探析%Study on Crack of DC Torque Motor's Armature After Sealed with Epoxy Resin
Institute of Scientific and Technical Information of China (English)
罗润娟; 周钦沅; 董文生
2012-01-01
直流力矩电机电枢用环氧树脂灌封后胶层开裂的问题是直流力矩电机在生产制造过程中较为常见的一种问题.本文从灌封料配方及其它因素去分析,解决该类电机电枢灌封开裂.%In the producing of DC torque motor's armature,it's a usual problem about the glue layer cracking after sealed with epoxy resin. This problem was analyzed from sealing compounds to other factors in this paper,so as to solve the crack of this kind of motor's armature.
Institute of Scientific and Technical Information of China (English)
王宗培; 陈敏祥
2012-01-01
The new DC motor (New DCM) shares the same armature winding with traditional DC motor (DCM) , all adopt seal connection (namely polygon connection) to combine K commutating units, the armature winding of New DCM is similar but are different with multi-phase AC motor's armature winding which employ typical polygon connection. New DCM is neither multi-phase AC motor nor multi-phase BLDCM. Multi-phase AC armature winding adopted typical polygon connection can have circular current in closed circuit. However, New DCM or DCM with seal connection armature winding will not and can not have circular current in closed circuit.%新直流电动机(New DCM)与传统有刷直流电动机(DCM)有相同的电枢绕组,都是分成K个换向单元成封闭形(多边形)接法,与多相交流电动机采取封闭形(多边形)接法的电枢绕组有类似之处但有区别,New DCM不是一台多相交流电动机,也不是一台多相无刷直流电动机.与典型多边形接法的多相交流电枢绕组闭合回路可能有环流的情况不同,New DCM或DCM为封闭形接法的电枢绕组,闭合回路内不存在环流,不可能产生环流.
Institute of Scientific and Technical Information of China (English)
赵明
2001-01-01
@@ 采用DC600V供电的动车组,由于其电气原理复杂,电气元件相对较多,布线受动车结构限制,全列编组后,DC110 V联接器和通信联接器全部连在一起.当有一台车DC110 V漏电,检测时却发现在故障车或其他车上漏电故障时有时无,即有时在故障车或其他车上可以检测出故障,有时检测不出来,给故障查找带来很大困难.若不及时解决漏电问题,将严重影响行车安全.下面对漏电原因作一具体分析,并提出解决方法.
Institute of Scientific and Technical Information of China (English)
李尉; 宋保维; 胡欲立
2012-01-01
Underwater vehicles are widely used in ocean. Electrical power underwater vehicles, which have the advantage of simple structure, convenient maintenance, et al. are used more widely than thermal power underwater vehicles. By using the finite element analysis software Magnet, inner and outer magnetic fluxes of a permanent magnet DC motor for the propulsion of a certain electrical power underwater vehicle is numerically simulated with and without load. The acquired results can apply to analyzing interference of the leakage magnetic flux of a permanent magnet DC motor for the propulsion of underwater vehicles to their nearby electronic instruments and equipments.%水下航行器在海洋中已得到广泛应用,而电动力水下航行器较热动力水下航行器由于具有结构简单、维护方便等优点应用更广泛.应用有限元分析软件Magnet,对某型电动力水下航行器推进用永磁直流电机有无负载时内、外磁场进行了数值模拟,所获得的结果可用于分析电机漏磁场对其周围电子仪器设备的干扰.
Luo, Fang Lin
2003-01-01
INTRODUCTIONHistorical ReviewMultiple Quadrant ChoppersPump CircuitsDevelopment of DC/DC Conversion TechniqueCategorize Prototypes and DC/DC Converters Family TreeVOLTAGE-LIFT CONVERTERSIntroductionSeven Self-Lift ConvertersPositive Output Luo-ConvertersNegative Output Luo-ConvertersModified Positive Output Luo-Converters Double Output Luo-ConvertersPOSITIVE OUTPUT SUPER-LIFT LUO-CONVERTERS IntroductionMain SeriesAdditional SeriesEnhanced Series Re-Enhanced Series Multiple-Enhanced Series Summary of Positive Output
Shaft transducer having dc output proportional to angular velocity
Handlykken, M. B. (Inventor)
1984-01-01
A brushless dc tachometer is disclosed that includes a high strength toroidal permanent magnet for providing a uniform magnetic field in an air gap, an annular pole piece opposite the magnet, and a pickup coil wound around the pole piece and adapted to rotate about the axis of the pole piece. The pickup coil is rotated by an input shaft to which the coil is coupled with the friction clip. The output of the coil is conducted to circuitry by a twisted wire pair. The input shaft also activates a position transducing potentiometer.
屏蔽罩对永磁直流电机磁场的影响分析%Magnetic Field Analysis of Permanent Magnet DC Motor with Different Shields
Institute of Scientific and Technical Information of China (English)
李继明; 胡欲立
2011-01-01
This paper numerically simulated and analyzed the inside and outside magnetic fields of a permanent magnet DC motor with different shield thickness for a certain underwater vehicle in static and load conditions. The acquired results can guide the selection of the shield and it has a good engineering application value.%利用电磁场有限元分析软件MagNet,对某型水下航行器推进用永磁直流电动机分别在静态和负载条件下采用不同厚度屏蔽罩时的磁场进行了数值仿真,分析研究了屏蔽罩对电机内外磁场的影响,所得结果可以指导屏蔽罩的选用,具有较好的工程应用价值.
Influence of Temperature Rise on Shunt DC Motor Performance%温升对并励直流电动机性能的影响
Institute of Scientific and Technical Information of China (English)
陈旭东; 冯攀
2011-01-01
Because the resistance of the field winding is much larger than that of the armature, the influence of temperature rise on the performance of shunt motor is marked. The modeling and simulation in Matlab were presented,and studied that influence on the motor physical parameters and performance by the temperature rise was studied. The results show that it is counteractive on motor performance between armature and field winding among temperature rise. In order to depress the influence,the armature stuffs whose temperature coefficient is large was selected.%并励直流电动机因励磁绕组电阻远大于电枢绕组电阻,温升对电机性能的影响较为显著.该文在Mat-lab软件平台下,对并励电动机进行了建模和仿真,着重研究温升导致的电机物理参数和工作性能的变化,结果显示励磁线圈和电枢线圈在温升过程中对电机性能的影响具有“反效果”,因此可以选用具有较大温度系数的电枢绕组材料来降低温升的影响.
Institute of Scientific and Technical Information of China (English)
王祥; 宗长富; 邢海涛; 吴仁军; 张太武; 何晨雨
2013-01-01
Electric motors, as the actuator of electric power steering (EPS) system and steer-by-wire (SBW) system, its reliable operation is of utmost importance for the driving safety of vehicle with electrically controlled steering. In this paper, by building a model for permanent magnet DC motor (PMDCM) and applying recursive least square method with forgetting factor, a fault diagnosis scheme for PMDCM is proposed. A real SBW vehicle test is conducted for validation with a result indicating that the scheme proposed can accurately diagnose the faults of PMDCM realtime, laying a foundation for the fault-tolerant control of electrically controlled steering system.%作为电动助力转向系统和线控转向系统执行元件的电动机,其可靠运行对电控转向汽车的行驶安全至关重要.本文中通过建立永磁直流电机模型和运用带有遗忘因子的递推最小二乘法,提出了一种电控转向系统直流电机故障诊断方法.线控转向实车试验验证的结果表明,该方法可准确、实时地诊断直流电机故障,为电控转向系统的容错控制奠定基础.
A New-style Permanent-magnet Motor with Double-stator Structure
Institute of Scientific and Technical Information of China (English)
无
2003-01-01
A new-style direct drive motor with double-stator structure is proposed. The structure and principle of the permanent-magnet (PM) brushless motor are discussed. On the basis of numerical calculation, the cogging torque waveforms of the prototype motor when staggering two stators are analyzed. The method that can reduce torque ripple making use of the structure features of this motor is investigated. The results of numerical calculation and experiment indicate that designing motor with this kind of structure is a good scheme for increasing the power density.
Improved Sensorless Operation of Interior PM BLAC Motor Drives with Reduced-Order EKF
Institute of Scientific and Technical Information of China (English)
Yang-Feng Shi; Zi-Qiang Zhu; David Howe
2006-01-01
It is a challenge to realise an EKF-based sensorless controller for an Interior Permanent Magnet (IPM) brushless ac motor drive due to the influence of non-linearities and rotor saliency. An improved reduced-order EKF method is presented, reducing the rotor position estimation error of an IPM motor, as evident in [1] due to the neglect of saliency. The effectiveness of the proposed method is verified experimentally.
PWM SiNYALİ İLE DC MOTOR HlZ KONTROLÜ VE SÜRÜCÜ DEVRESİNİN ESD ETKİLERİNDEN KORUNMASI
Directory of Open Access Journals (Sweden)
Fatih Kurt
2002-09-01
Full Text Available PWM sinyali, motor hızını kontrol etntek ıçın başvurulan verimli bir yöntemdir. PWM sinyalini yazılım ile üretmek çok kolayd ır. Temel olarak motorun dönme hız ı, darbeler şeklin de ENABLE girişine uygulanacak lojik voltajm darbe zaman aralığına bağhdır. Bu yazıda PWM sinyalinin; 8254 terminali ve yazılam ile üretilmesi, devrenin işleyişi ve aynı devre üzerin de elektronik bileşenler için hassas bir nok taya gelen Elektrostatik Deşarj (ESD etkisinden korunma olayına değinilmiştir
Institute of Scientific and Technical Information of China (English)
张文山; 刘淑琴
2016-01-01
A kind of brushless DC motor which can be used for axial-flow maglev artificial heart pump was introduced. The motor has characteristics of large air gap and high-speed. The motor body was developed by the method of combining the traditional magnetic circuit design and finite assistant analysis ( FEA ) . The experimental results shows that the motor can run stably, has high speed and low noise, dissipate less hate, has wide speed regulation at limited-low voltage. The speed curve is approximately a straight line below the no-load speed point. This design approach is proved to be reasonable and effective.%介绍了一种可用于轴流式磁悬浮人工心脏泵的无槽式永磁无刷直流电动机。电机具有大气隙、高转速特点。电机本体采用经典磁路法和有限元辅助分析相结合的方法研制而成。试验结果表明，电机运行平稳、转速高、噪声低、发热小，有限低电压下调速范围宽，调速曲线在不超过空载转速范围内近似一条直线，证明了设计方法合理有效。
Malik, Naveed ur Rehman
2012-01-01
This thesis deals with the steady-state, dynamic and control aspects of new type of brushless configuration of a doubly-fed induction machine in which the slip rings and carbon brushes are replaced by rotating power electronics and a rotating exciter. The aim is to study the stability of this novel configuration of the generator under mechanical and grid disturbances for wind power applications. The derivation, development and analysis of the steady-state model of the brushless doubly-fed ind...
Design of Fully-integrated and H-bridge for DC Motor Driver IC%全集成全桥直流马达驱动芯片的设计
Institute of Scientific and Technical Information of China (English)
郭振宗; 何进; 罗将; 王豪; 常胜; 黄启俊
2016-01-01
基于CSMC 0．5μm HV CMOS工艺，实现了一款具有优良动态性能和全面失效保护功能的全集成全桥直流马达驱动芯片．芯片提供了待机、正转、反转和制动四种基本驱动模式，以及脉冲宽度调制（PWM ）调速和模拟电压调速两种调速模式；集成了全面的失效保护电路，包括欠压保护电路、过温保护电路和过流保护电路．流片封装后的样片测试结果表明，芯片各工作模式正常；在电源电压分别为5V，4V，3V时，驱动MOS管的导通电阻分别约为0．65Ω，0．8Ω，1Ω；在2．5～5．5V工作电压范围内，可以提供最大值为1A的驱动电流．%A fully integrated and H‐bridge DC motor driver with excellent dynamic performance and comprehensive fail‐safe function has been implemented in CSMC 0 .5‐μm HV CMOS technology .In addition to operation with four basic modes ,such as idle ,forward ,reverse and brake ,this IC also can drive motor with two kinds of speed regulated modes :pulse width modulator (PWM ) signal and analog voltage .The IC integrates comprehensive fail‐safe circuits ,including the under voltage protection circuit ,over‐temperature protection circuit and overcurrent protection circuit .The measured results of packaged IC sample show that all drive modes operated well .The power MOSFET’s on resistance are about 0 .65 Ω、0 .8 Ω and1 Ω when supply voltage were 5 V、4 V and 3 V ,respectively . The IC can output a maximum of 1 A dc current within a supply voltage range of 2 .5‐5 .5 V .
Electric vehicle motors and controllers
Secunde, R. R.
1981-01-01
Improved and advanced components being developed include electronically commutated permanent magnet motors of both drum and disk configuration, an unconventional brush commutated motor, and ac induction motors and various controllers. Test results on developmental motors, controllers, and combinations thereof indicate that efficiencies of 90% and higher for individual components, and 80% to 90% for motor/controller combinations can be obtained at rated power. The simplicity of the developmental motors and the potential for ultimately low cost electronics indicate that one or more of these approaches to electric vehicle propulsion may eventually displace presently used controllers and brush commutated dc motors.
Chen, Juan
2008-01-01
This report is the result of a Master Thesis work done at Seaward Electronics Inc. in Beijing, China from June to December in 2007. The main goal for this thesis is to verify and improve the performance of Honey-PWM DC-DC converter, which has been fabricated by a standard 0.6um CMOS processes. The project was started with studying of Buck converter structure. After the understanding of the converter structure, the project goes in to the analyses phase for each sub-cells, including the theory,...
Directory of Open Access Journals (Sweden)
Tianxun Chen
2016-01-01
Full Text Available This paper presents a computationally efficient loss prediction procedure and thermal analysis of surface-mounted brushless AC permanent magnet (PM machine considering the UDDS driving duty cycle by using a lumped parameters’ thermal model. The accurate prediction of loss and its variation with load are essential for thermal analysis. Employing finite element analysis (FEA to determine loss at every load point would be computationally intensive. Here, the finite element analysis and/or experiment based computationally efficient winding copper and iron loss and permanent magnet (PM power loss models are employed to calculate the electromagnetic loss at every operation point, respectively. Then, the lumped parameter thermal method is used to analyse the thermal behaviour of the driving PM machine. Experiments have been carried out to measure the temperature distribution in a motor prototype. The calculation and experiment results are compared and discussed.
A Built-in Electric Cable Winch Driven by DC Motor%一种直流电机驱动的内装式电动电缆绞盘
Institute of Scientific and Technical Information of China (English)
杨少琴; 庄衍平
2014-01-01
介绍一种新型的直流电动机驱动的内装式电动电缆绞盘，这种电缆绞盘由直流电动机驱动，减速器为活齿减速器结构，把驱动装置和减速机构装在电缆绞盘滚筒里面。整体结构简单、紧凑，传动效率高，广泛应用于移动电源的电缆收放作业。%This paper introduces a new type built-in electric cable winch driven by DC motor .Decelerator structure is oscillating tooth decelerator , make the driving device and reducing mechanism installed in the roller of cable winch .The whole structure is simple and compact .Its transmission efficiency is high and widely used in twis-ted and released of the cable operation of mobile power supply .
Structure Design and Strength Analysis of the Permanent DC Motor%永磁直流电动机电枢结构设计和强度分析
Institute of Scientific and Technical Information of China (English)
王峥; 原慧芳; 王桢楠
2013-01-01
以低惯量耐高冲击空心杯永磁式直流电动机电枢为工程研究对象,简要介绍了电枢的结构设计,对空心杯电枢的结构强度和耐冲击能力进行了详细的数值计算和有限元分析,最后,进一步优化电枢的结构设计和关键工艺.%The permanent-magnet cup-armature DC motor's rotor with a small inertia moment and high anti-shock ability was taken as the research object.The rotor's structure was introduced briefly.The structural strength and anti-shock ability of cup-armature rotor were calculated and analyzed with FEA(Finite Element Analysis) in detail.The rotor's structure and key process were optimized further.
Directory of Open Access Journals (Sweden)
Liwen Pan
2016-06-01
Full Text Available This paper presents an on-board vehicular battery charger that integrates bidirectional AC/DC converter and DC/DC converter to achieve high power density for application in electric vehicles (EVs. The integrated charger is able to transfer electrical energy between the battery pack and the electric traction system and to function as an AC/DC battery charger. The integrated charger topology is presented and the design of passive components is discussed. The control schemes are developed for motor drive system and battery-charging system with a power pulsation reduction circuit. Simulation results in MATLAB/Simulink and experiments on a 30-kW motor drive and 3.3-kW AC/DC charging prototype validate the performance of the proposed technology. In addition, power losses, efficiency comparison and thermal stress for the integrated charger are illustrated. The results of the analyses show the validity of the advanced integrated charger for electric vehicles.
Finite Element Modeling of Five Phase Permanent Magnet BLDC Motor for High Power Density Application
Directory of Open Access Journals (Sweden)
Kiran George
2013-12-01
Full Text Available Fault-tolerant capability of electrical motor drives is an essential feature in applications such as automotive, aeronautic, and many others. A multi-phase permanent-magnet BLDC motor exhibits a high fault tolerant capability hence increasing the reliability, as it can be designed to reduce the fault occurrence as well as to operate indefinitely in the presence of fault. With multi independent phases, in the event of failure of one or more, the remaining healthy phases let the motor to operate properly. This paper presents finite element modeling and results of a five-phase permanent magnet brushless motor designed for high power density application .
Andersson, Martin
2011-01-01
1 SammanfattningCrossControl är ett företag som bland annat tillverkar integrerade datorlösningar. Datorerna drivs normalt med 18-30 VDC och förbrukar som mest 50W. Datorerna säljs till flertalet olika kunder som monterar dem i allt från skogsmaskiner till tåg. I de olika fordonen varierar spänningen i de befintliga elnäten. Detta skapar behovet av att omvandla spänningen till en nivå som datorerna klarar av. En sådan apparat kallas DC/DC-omvandlare. Spänningsomvandling kan utföras genom linj...
Metamodels for New Designs of Outer-Rotor Brushless Synchronous Electric Motors
Directory of Open Access Journals (Sweden)
Dirba J.
2014-04-01
Full Text Available Rakstā ir apskatītas metamodeļu iegūšanas iespējas to izmantošanai bezkontaktu sinhrono dzinēju analīzē un optimizācijā. Ir iegūti metamodeļi sinhronam dzinējam ar pastāvīgajiem magnētiem un reaktīvam dzinējam ar ārējo rotoru. Sintezēto metamodeļu iegūšanai izmantoti elektrisko dzinēju magnētiskā lauka skaitlisko aprēķinu rezultāti, ievērojot magnētiskās ķēdes piesātinājumu. Metamodeļu pārbaude aprēķinu un starppunktos parādīja, ka to iegūšanai dārgo reālo eksperimentu vietā var izmantot magnētiskā lauka aprēķinu rezultātus.
Zhiyi Song; Chengde Tong; Jingang Bai; Qian Wu; Ping Zheng
2013-01-01
A novel brushless double rotor machine (BDRM) is proposed in this paper. The BDRM is an important component in the brushless compound-structure permanent-magnet synchronous machine (CS-PMSM) system, which is a promising technology for power-split hybrid electric vehicle (HEV) applications. Compared with common double rotor machines, the brushes and slip rings required by rotating winding have been omitted in the BDRM, thus there are no such problems as maintenance, friction losses and so fort...
Youngquist, Robert C.; Ihlefeld, Curtis M.; Starr, Stanley O.
2013-01-01
A component level dc transformer is described in which no alternating currents or voltages are present. It operates by combining features of a homopolar motor and a homopolar generator, both de devices, such that the output voltage of a de power supply can be stepped up (or down) with a corresponding step down (or up) in current. The basic theory for this device is developed, performance predictions are made, and the results from a small prototype are presented. Based on demonstrated technology in the literature, this de transformer should be scalable to low megawatt levels, but it is more suited to high current than high voltage applications. Significant development would be required before it could achieve the kilovolt levels needed for de power transmission.
Design motor control system of the main circuit and driver circuit%电机控制系统主电路及驱动电路的设计
Institute of Scientific and Technical Information of China (English)
阴丽华; 曾显恒
2014-01-01
Motor body chosen in this article brushless DC motor using three phase windings star connected while power device is composed of an inverter bridge circuit. The article describes the control system hardware circuit design process. In EasyARM2100 development board for the core of the control unit, the main circuit and the drive unit line described, and hardware design also made corresponding explanation.%本文中选用的无刷直流电动机的电机本体采用星形连接的三相对称绕组，同时功率器件组成的逆变器为桥式电路。文章主要叙述了控制系统的硬件电路设计过程。以EasyARM2100开发板为核心的控制单元，主电路及驱动单元行了阐述，并对硬件设计也作出了相应的解释。
UNIFIED CONTROL STRUCTURE OF MULTI-TYPE INTERIOR PERMANENT MAGNET MOTOR
Directory of Open Access Journals (Sweden)
M. NORHISAM
2015-03-01
Full Text Available This paper presents the control strategy structure to extract the speed torque characteristic for the newly designed three phase Multi Type Interior Permanent Magnet Motor. The proposed structure with the driving circuits exhibit the performance of torque characteristics of the stepper motor and brushless motor with independent coil winding per phase especially used as an in-wheel motor in agricultural applications. Brushless Direct Current motors exhibit characteristics of generating high torque at high speed while the Permanent Magnet Stepper motors has characteristic of generating high torque at low speed. The typical characteristics of the above two are integrated in the proposed structure with a complex control structure that handle the switching complexity and speed control in real time. Thus, a specially designed driving system is essential to drive and control this special motor. The evaluation of the motor mechanical characteristics when applying load torque is also presented. The result determines the practical torque range applicable for each motor configuration and as combined machine.
Advanced DC Motor Drive for Haptic Devices
Miroslav Božić; Darko Todorović; Miloš Petković; Volker Zerbe; Goran S. Đorđević
2012-01-01
Haptics covers many different forms of mechanical interaction with human senses by engaging, touch, vibrations and forces/torques, established for the purpose of augmenting the feedback structure during human-machine interaction. A haptic device has mechanical part, moved by actuators from one and human hand or fingers from the other, actuators, drives, sensing elements, as well as algorithms designed to control the interaction between human and machine in positioning and motion control tasks...
Loss analysis of permanent magnet hybrid brushless machines with and without HTS field windings
Chau, KT; Liu, C; Li, W
2010-01-01
This paper presents and implements the power loss analysis of a new kind of permanent magnet hybrid brushless (PMHB) machines with and without using high-temperature superconductor (HTS) field windings. The circuit-field-torque time-stepping finite element method together with experiential equations is developed to perform power loss analysis of the PMHB machine. Experimentation is carried out to verify the proposed loss analysis. © 2006 IEEE.
Design and Optimization of Permanent Magnet Brushless Machines for Electric Vehicle Applications
Directory of Open Access Journals (Sweden)
Weiwei Gu
2015-12-01
Full Text Available In this paper, by considering and establishing the relationship between the maximum operating speed and d-axis inductance, a new design and optimization method is proposed. Thus, a more extended constant power speed range, as well as reduced losses and increased efficiency, especially in the high-speed region, can be obtained, which is essential for electric vehicles (EVs. In the first step, the initial permanent magnet (PM brushless machine is designed based on the consideration of the maximum speed and performance specifications in the entire operation region. Then, on the basis of increasing d-axis inductance, and meanwhile maintaining constant permanent magnet flux linkage, the PM brushless machine is optimized. The corresponding performance of the initial and optimal PM brushless machines are analyzed and compared by the finite-element method (FEM. Several tests are carried out in an EV simulation model based on the urban dynamometer driving schedule (UDDS for evaluation. Both theoretical analysis and simulation results verify the validity of the proposed design and optimization method.
A Multiport Isolated DC-DC Converter
Tran, Yan-Kim; Dujic, Drazen
2016-01-01
This paper presents a multi-port isolated DC-DC converter for DC applications. A three-port structure is presented, characterized with full bidirectional power flow and simple control. Galvanic isolation is achieved by means of a multi-winding medium frequency transformer which is a part of a resonant LLC converter. To provide controllable power exchange with external DC ports, two out of three ports are equipped with additional bidirectional buck/boost stages. They serve to provide active po...
Multiport Resonant DC-DC Converter
Tran, Yan-Kim; Dujic, Drazen; Barrade, Philippe
2015-01-01
his paper presents a multiport galvanically isolated LLC resonant DC-DC converter suitable for DC applications. A three-port structure is analyzed, with full bidirectional power flow capabilities, simple control and behavior similar to that expected from a DC transformer. Each port is equipped with half-bridge modules accompanied with tuned resonant tank, partly realized with elements of a multi- winding high frequency transformer. With some restrictions that are explained in the paper, each ...
Cosp Vilella, Jordi; Martínez García, Herminio
2015-01-01
Hybrid DC-DC regulators are structures that combine both a linear voltage regulator and a switching DC-DC converter. The main objective of this hybrid topology is to converge, in a single circuit topology, the best of both alternatives: a small voltage output ripple, which is a common characteristic of linear regulator circuits, and good energy efficiency, as in switching alternatives. While the linear regulator fixes the required output voltage to a fixed value with negligible steady-state r...
Directory of Open Access Journals (Sweden)
Jehun Hahm
2015-01-01
Full Text Available This paper proposes an integrated photovoltaic (PV and proton exchange membrane fuel cell (PEMFC system for continuous energy harvesting under various operating conditions for use with a brushless DC motor. The proposed scheme is based on the incremental conductance (IncCond algorithm combined with the sliding mode technique. Under changing atmospheric conditions, the energy conversion efficiency of a PV array is very low, leading to significant power losses. Consequently, increasing efficiency by means of maximum power point tracking (MPPT is particularly important. To manage such a hybrid system, control strategies need to be established to achieve the aim of the distributed system. Firstly, a Matlab/Simulink based model of the PV and PEMFC is developed and validated, as well as the incremental conductance sliding (ICS MPPT technique; then, different MPPT algorithms are employed to control the PV array under nonuniform temperature and insolation conditions, to study these algorithms effectiveness under various operating conditions. Conventional techniques are easy to implement but produce oscillations at MPP. Compared to these techniques, the proposed technique is more efficient; it produces less oscillation at MPP in the steady state and provides more precise tracking.
Gerasimos G. Rigatos; Pierluigi Siano
2011-01-01
The paper studies sensorless control for DC and induction motors, using Kalman Filtering techniques. First the case of a DC motor is considered and Kalman Filter-based control is implemented. Next the nonlinear model of a field-oriented induction motor is examined and the motor
Energy saving dc-dc converter circuit
International Nuclear Information System (INIS)
An energy saving dc-dc converter circuit is disclosed having two energy efficient means which operate in tandem, an energy conserving means and a voltage doubling means. These energy efficient means are applied in combination with elements commonly found in dc-dc converter circuits, namely an ac voltage generator, a transformer for stepping up the generated ac voltage, and means for storing the converted dc voltage. The energy conserving means is connected to the dc voltage storage means. It comprises a resettable inhibit circuit which cuts off the provision of dc voltage for conversion for a predetermined interval when the output of the converter exceeds a predetermined level. The voltage doubling means is reponsive to outputs of the inhibit circuit of the energy conserving means and the ac voltage generator. It provides a phase inverted waveform of the generated ac voltage on one of two leads to the ac voltage step-up transformer
飞轮储能系统用电动/发电机的研究%Research on Motor/Generator for Flywheel Storage System
Institute of Scientific and Technical Information of China (English)
张广明; 张龙; 梅磊; 季文娟
2012-01-01
飞轮储能电机是飞轮储能系统能量转换的核心,关系着飞轮储能系统的可靠、高效运行.正确选择飞轮储能电机对提高飞轮储能系统的性能具有非常重要的意义.在简单介绍了飞轮储能系统的基础上,对异步电机、开关磁阻电机和无刷直流电机的工作原理和研究现状进行了详细分析,并比较了各自在飞轮储能系统中的优缺点,最后,对飞轮储能电机技术的发展进行了展望.%The flywheel storage motor is the core energy conversion of flywheel energy storage system, and has a significant effect on the reliability and efficiency of the FESS. The right choice of flywheel storage motor is of great important significance for improving the performance of flywheel storage system. Based on the brief introduction of flywheel energy storage system, the research status and the working principle of asynchronous machine, switched reluctance machine and brushless DC machine were analyzed,and their respective advantages and disadvantages in flywheel energy storage system were compared. The technology development of flywheel energy storage motor was prospected.
Directory of Open Access Journals (Sweden)
Mehrdad Jafarboland
2014-09-01
Full Text Available Designing a two-phase brushless direct current motor (BLDC and analyzing effects of stator slots structure on the motor operation are main objectives of this paper. At first BLDC motor with three different structures for stator slots is designed by using RMxprt software and efficiency of BLDC motor for different structures in full-load condition has been presented, then the BLDC motor in different conditions by using Maxwell 3D software is designed and with finite element method is analyzed electromagnetically. The results of simulations show that by varying stator slots structure efficieny and operation of motor have changed significantly therefore with correct choosing of stator slots structure intersted operation can be found.
CMOS Integrated Capacitive DC-DC Converters
Van Breussegem, Tom
2013-01-01
This book provides a detailed analysis of all aspects of capacitive DC-DC converter design: topology selection, control loop design and noise mitigation. Readers will benefit from the authors’ systematic overview that starts from the ground up, in-depth circuit analysis and a thorough review of recently proposed techniques and design methodologies. Not only design techniques are discussed, but also implementation in CMOS is shown, by pinpointing the technological opportunities of CMOS and demonstrating the implementation based on four state-of-the-art prototypes. Provides a detailed analysis of all aspects of capacitive DC-DC converter design; Analyzes the potential of this type of DC-DC converter and introduces a number of techniques to unleash their full potential; Combines system theory with practical implementation techniques; Includes unique analysis of CMOS technology for this application; Provides in-depth analysis of four fabricated prototypes.
DC-Link Compensation Method for Slim DC Link Drives Fed by Soft Grid
DEFF Research Database (Denmark)
Mathe, Laszlo; Rosendahl Andersen, Henrik; Lazar, Radu;
2010-01-01
harmonic distortion (PWHD) of the line current are degraded, if resonance between the line impedance and the DC-link capacitance occurs. Likewise, the motor performance is affected negatively giving extra torque ripple, vibration and acoustic-noise emission. This paper proposes a novel DC-link compensation...... method, which ensures the stability of the slim DC-link on a soft grid. The proposed compensation method may be used for open- and closedloop control schemes, requiring a small overhead in the digital implementation....
A Comparative Overview to DTC For PMSM Driven Pure Electric Vehicles
Directory of Open Access Journals (Sweden)
Fatih Korkmaz
2016-04-01
Full Text Available For many industrial applications that including ele ctric motor, selecting of the appropriate motor type is keypoint for the application success and efficiency. This paper presents a comparative performance evaluation between direct t orque controlled Brushless AC and Brushless DC motors which have been considered as t raction motor on electric vehicles. Moreover, a short review to brushless AC and brushl ess DC motor technology and vector driver systems are also included. The main structure of th e direct torque control method is presented and small-scale pure electric vehicle model is inte grated to the motor control model. To make a fair comparison, the brushless AC and brushless DC motors modeled as having the same electrical parameters and simulated with same contr ol model parameters. The simulation studies have shown that direct torque controlled b rushless AC and brushless DC motors have similar performance as vehicle traction motor, and both motor types can be considered as a good candidate for electric vehicles applications.
Directory of Open Access Journals (Sweden)
IVAN ALCALÁ
2014-01-01
Full Text Available Este artículo describe el análisis, modelado y simulación de un vehículo eléctrico (EV enfocado al desarrollo de un banco de pruebas para reproducir la dinámica del EV. El banco está formado por un drive de motor de inducción (IM acoplado directamente a una máquina de DC y a un volante de inercia a través de una transmisión. El volante de inercia y la máquina de DC reproducen la dinámica y las fuerzas que actúan en el vehículo. Se propone una metodología para diseñar un banco de pruebas de EV para estudiar el comportamiento de vehículos eléctricos cercano a las condiciones de operación reales. El análisis de las fuerzas en el EV en conjunto con la máquina DC define las condiciones de operación del EV. El modelado y la simulación son desarrollados en MATLAB/Simulink, el banco de pruebas implementado es controlado por un DSP. Finalmente, los resultados de simulación y experimentales obtenidos validan el funcionamiento del banco de prueba.
Analysis of Software Control Strategy for Motor Drive System in Electric Vehicles%电动汽车电机驱动系统软件控制策略分析
Institute of Scientific and Technical Information of China (English)
韦敏; 韦娟; 贾钰
2011-01-01
The motor drive system of electric vehicles was designed based on rare-earth permanent brushless DC motor in this paper. In the system, TMS320LF2407 A is selected as the main control chip, and the modularization software design mainly of interrupt subroutine is used. The scientific and rational algorithm is applied in motor circulation phase commutation and modulating pulse width, which can ensure the real-time of the system. The control strategy of software, the basic design idea, and part of procedure flowchart are introduced in detail. By the results of testing, a complete digital control method is proposed, which shows the system is safe, reliable.%设计了基于稀土永磁无刷直流电机的电动汽车驱动系统,系统选用了TMS320LF2407A作为主控芯片,采用以中断子程序为主的模块化软件结构,在电机循环换相和脉宽调制中采用了简单合理的算法,保证软件运行的快速、准确性.文中主要介绍了软件的控制策略、设计思想及部分程序流程图.通过试验验证,系统能提供完整的数字控制方案,具有良好的可靠性和安全性.
Institute of Scientific and Technical Information of China (English)
王志强; 房建成
2011-01-01
In order to solve the problem of reaction flywheel motor torque ripple effecting satellite attitude control accuracy, the flywheel motor commutation torque ripple minimization conditions are derived by adopting the analytical method of permanent magnet brushless DC motor induced electromotive force, phase current and electromagnetic torque,and a highly dynamic aynergetic control approach is proposed based on the commutation torque ripple minimum conditions.The approach is Used to restrain commutation torque ripple of reaction flywheel under different operating conditions. The experiment results show that the commutation torque ripple decreases by 12％ in the electrical mode, and the commutation torque ripple is reduced by 90％ or more in controlled braking and reverse braking modes, thus verifying feasibility and effectiveness of the control approach.%针对反作用飞轮电机换相所产生的非理想力矩影响卫星姿态控制精度的问题,采用永磁无刷直流电机绕组感生电势、相电流和电磁转矩的解析计算方法得到了反作用飞轮电机的换相力矩波动最小化条件,提出了基于该最小化条件的换相力矩波动抑制高动态协同控制方法,抑制反作用飞轮电机三种运行状态下的换相力矩波动.试验结果表明,电动状态下换相力矩波动减小了12%、可控能耗制动和反接制动状态下换相力矩波动减小了90%以上,验证了该方法的可行性和有效性.
Design And Construction Of A Miniaturized Motor Controller For Interplanetary Rover
Lofgren, Henrik; Lijemark, Tomas; Lamoureux, Enrique; Bruhn, Fredrik; Hagstrom, Maria; Hall, Karin; Ljunggren, Anders; Habinc, Sandi; Gruener, Gabriel; Rusconi, Andrea; Boyes, Ben; Wagenbach, Susanne; Poulakis, Pantelis; Kohler, Johan
2011-10-01
providing the software for the MCC, which includes PID position, velocity, and torque control for brushed and brushless DC motors, as well as telecommand, telemetry and housekeeping through SpaceWire and CAN bus. Astrium UK is in charge of the definition of requirements for rover locomotion applications of the MCC. Astrium UK has experience from the Beagle project and is responsible for the Exomars rover development. Selex Galileo is in charge of the definition of requirements for three major applications of the MCC: robotic arms, complex motorized payloads (as drills and sample distribution systems) and exoskeletons. DLR Institute of Space Systems contributes to the definition of requirements related to rover locomotion drives and is furthermore in charge of environmental testing of the MCC prototype.
Multiple Replicas of Block Copolymer Thin Films from a Brushless Organosilicate Substrate
Suh, Hyo Seon; Yoon, Hyunsik; Char, Kookheon
2011-03-01
The chain end-grafted polymer brushes or cross-linked polymer mats have typically been utilized as the surface modification layers to induce the perpendicular orientation of block copolymer (BCP) thin films. Instead of such polymer-based approaches, we have recently introduced a new concept to control the BCP orientation using the brushless organosilicate (OS) substrates, whose surface energy can be finely tuned with thermal treatment. In this brushless case, the BCP chains do not penetrate into the underlying hard OS substrates during thermal annealing of BCP films, therefore, the BCP chains at the interface have no entangled structure with fairly weak adhesion of BCP films against the substrate. Owing to such weak adhesion of BCP films against the OS substrate, the perpendicularly oriented BCP film on a neutral OS substrate could be easily peeled off and transferred to a UV-curable resin applied onto the BCP film. The OS substrate after the peel-off process of a BCP film could regenerate the perpendicularly oriented BCP films since the surface energy of the OS substrate remains intact during the peel-off process. Furthermore, the direct-assembled BCP films on chemically patterned OS substrates could also be peeled off and transferred on to a UV-curable resin, allowing us to produce multiple replicas of direct-assembled BCP thin films from a single chemically patterned OS substrate.
Directory of Open Access Journals (Sweden)
Milutin G. Jovanović
2006-12-01
Full Text Available The brushless doubly-fed machine (BDFM allows the use of a partially rated inverter and represents an attractive cost-effective candidate for variable speed applications with limited speed ranges. In its induction machine form (BDFIM, the BDFM has significant rotor losses and poor efficiency due to the cage rotor design which makes the machine dynamic models heavily parameter dependent and the resulting controller configuration complicated and difficult to implement. A reluctance version of the BDFM, the brushless doubly-fed reluctance machine (BDFRM, ideally has no rotor losses, and therefore offers the prospect for higher efficiency and simpler control compared to the BDFIM. A detailed study of this interesting and emerging machine is very important to gain a thorough understanding of its unusual operation, control aspects and compromises between optimal performance and the size of the inverter and the machine. This paper will attempt to address these issues specifically concentrating on developing conditions for various control properties of the machine such as maximum power factor, maximum torque per inverter ampere and minimum copper losses, as well as analysing the associated trade-offs.
A resonant dc-dc power converter assembly
DEFF Research Database (Denmark)
2015-01-01
The present invention relates to a resonant DC-DC power converter assembly comprising a first resonant DC-DC power converter and a second resonant DC-DC power converter having identical circuit topologies. A first inductor of the first resonant DC-DC power converter and a second inductor...... of the second resonant DC-DC power converter are configured for magnetically coupling the first and second resonant DC-DC power converters to each other to forcing substantially 180 degrees phase shift, or forcing substantially 0 degree phase shift, between corresponding resonant voltage waveforms of the first...... and second resonant DC-DC power converters. The first and second inductors are corresponding components of the first and second resonant DC-DC power converters....
Energy Technology Data Exchange (ETDEWEB)
Igel, Juergen; Ollhaeuser, Helmut; Jeuck, Marc; Apfelbacher, Thomas [Alcoa/AFL Europe GmbH, Frickenhausen (Germany)
2008-09-15
Start-stop systems may be made more efficient, and energy recovery in regenerative brakes may be made more economical. The contribution describes a new DC/DC current inverter with integrated double-layer condensers developed by the electric/electronics department of Alcoa. The so-called Energy Conversion Module (ECM) will result in considerable fuel savings and also help to stabilize board grids which are nearing their limits because of the increasing number of electrified service aggregates. Motor car producers are currently testing the module. (orig.)
System and method for determining stator winding resistance in an AC motor using motor drives
Lu, Bin; Habetler, Thomas G; Zhang, Pinjia
2013-02-26
A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.
Energy Technology Data Exchange (ETDEWEB)
Campbell, Jeremy B; Newson, Steve
2013-02-26
Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.
Charge pump DC-DC converter comprising solid state batteries
Reefman, D.; Roozeboom, F.; Notten, P.H.L.; Klootwijk, J.H.
2013-01-01
An electronic device is provided which comprises a DC-DC converter. The DC-DC converter comprises at least one solid-state rechargeable battery (B1, B2) for storing energy for the DC-DC conversion and an output capacitor (C2).
Motor-operated valve (MOV) actuator motor and gearbox testing
International Nuclear Information System (INIS)
Researchers at the Idaho National Engineering and Environmental Laboratory tested the performance of electric motors and actuator gearboxes typical of the equipment installed on motor-operated valves used in nuclear power plants. Using a test stand that simulates valve closure loads against flow and pressure, the authors tested five electric motors (four ac and one dc) and three gearboxes at conditions a motor might experience in a power plant, including such off-normal conditions as operation at high temperature and reduced voltage. They also monitored the efficiency of the actuator gearbox. All five motors operated at or above their rated starting torque during tests at normal voltages and temperatures. For all five motors, actual torque losses due to voltage degradation were greater than the losses calculated by methods typically used for predicting motor torque at degraded voltage conditions. For the dc motor the actual torque losses due to elevated operating temperatures were greater than the losses calculated by the typical predictive method. The actual efficiencies of the actuator gearboxes were generally lower than the running efficiencies published by the manufacturer and were generally nearer the published pull-out efficiencies. Operation of the gearbox at elevated temperature did not affect the operating efficiency
Effect of annealing process of iron powder on magnetic properties and losses of motor cores
Indian Academy of Sciences (India)
Fuzheng Yin; Haibo Yang; Jianjun Tian; De-An Pan; Jian Wang; Shengen Zhang
2011-07-01
Iron powder magnetic cores are used as soft magnetic rotors, in micro special motors such as BS brake motors, refrigerator compressor motors and brushless servo motors. Heat treatment of iron powder played an important role in the magnetic properties and loss of the motor cores. After the annealing process, the cracks and the pores on the surface of the powder decreased which in turn decreased the micro-hardness. The Vickers-hardness of the powder decreased from 50–42, while the resistance of the cores increased by 87% after annealing at 400°C for 30 min. The amplitude permeability and magnetic loss of the cores reached the maximum and minimum values, respectively. The magnetic loss of the cores was separated into hysteresis loss and eddy current loss by Stoppels Method which were decreased by the annealing process.
Design and Simulation of New Cascade Brushless Doubly-fed Machine%新型级联式无刷双馈电机设计与仿真
Institute of Scientific and Technical Information of China (English)
徐优; 王自强
2015-01-01
The new cascade Brushless Doubly-fed Machine ( BDFM) is mainly used for wind power , when the speed of prime mover changes , without changing the input frequency of the excitation current , this generator can guarantee the frequency of the output current is constant , which realize the variable speed constant frequency (VSCF) power.The working principle of the new cascade BDFM was derived , and two motors were established in Ansoft software , then imported into Simplorer software , cascaded and simulated . Simulation results show that if the new cascade BDFM make sure two coaxial rotorsare connected with the same phase sequence and two motor pole pairs are equal , it can achieve VSCF power without inv erter.%新型级联式无刷双馈发电机可以看作是普通级联式双馈电机的一种特例，主要用于风力发电，当电机转速变化时，不需要改变输入励磁电压的频率就可以保证电机输出的电压频率恒定，方便的实现了变速恒频发电。对新型级联式双馈电机的工作原理进行了简要论述，在Ansoft软件里面建立了电机的模型，并导入到Simplorer软件，把两个电机级联起来进行了仿真。仿真结果表明新型级联式双馈电机只需确保两电机转子同轴同相序连接，且两电机极对数相等，即可实现无需变频器的变速恒频发电。
轮缘驱动式姿控飞轮电机设计%Design of rim-driven attitude control flywheel motor
Institute of Scientific and Technical Information of China (English)
王辉; 武俊峰; 吴一辉
2012-01-01
为了提高小卫星用姿控飞轮的转动惯量/质量比,实现飞轮调姿系统的轻量化,设计了一种飞轮用永磁无刷直流电机.根据电机磁路,推导了磁钢尺寸与最大磁能积的关系；采用有限元法分析了磁路参数对飞轮性能的影响；针对飞轮电机大气隙、大径长比的结构特点,给出了气隙磁通密度的计算方法；建立了绕组参数与电机额定数据间的关系；仿真分析了电机性能.通过对一台最高转速为6 000 r/min、角动量为5 Nms的飞轮电机样机进行实验验证,得出最大设计误差为6.5％,证明了设计方法的正确性.%To improve the inertia / mass ratio of attitude control flywheel used in small satellite and lighten the weight of flywheel attitude adjustment system,a brushless DC motor used in flywheel was designed. According to the motor magnetic circuit,the corresponding relationship between the size and maximum energy of magnet was derived. The influence of magnetic circuit parameters on the flywheel performance was analyzed by using the Finite Element Method (FEM). For the flywheel structure feature of large equivalent air-gap and large ratio of diameter to length, a method for calculating air-gap magnetic flux density was proposed. The relationship between winding parameters and the motor rated data was established. Simulation method was used to analyze the motor performances. Compared with a flywheel motor with the angular moment of 5 Nms at the highest speed of 6 000 r/min,the maximum error is 6. 5% .which proves the correctness of the design method.
Yan LIU; Wang, Xu; Xing, Yan
2013-01-01
With the rapid growth of an AC adjusted speedsystem application, it is necessary to controland reduce harmonic pollution since theproblem brought about by the device of powerelectronics not only blocks the development ofpower electronics technology, but also causessevere harm in an electric power system. In thispaper an improved three-level direct torquealgorithm for brushless doubly-fed machines hasbeen developed for reducing the torque and fluxripples in a brushless doubly-fed machine. This...
Energy Technology Data Exchange (ETDEWEB)
Kazmierkowski, M.P. [Institute of Control and Industrial Electronics, Warsaw University of Technology, Warszawa (Poland)
1997-12-31
In this paper a review of control methods for high performance PWM inverter-fed induction motor drives is presented. Starting from the description of an induction motor by the help of the space vectors, three basic control strategic are discussed. As first, the most popular Field Oriented Control (FOC) is described. Secondly, the Direct Torque and Flux vector Control (DTFC) method, which - in contrast to FOC - depart from idea of coordinate transformation and analogy with DC motor, is briefly characterized. The last group is based on Feedback Linearization Control (FLC) and can be easy combined with sliding mode control. The simulation and experimental oscillograms that illustrate the performance of the discussed control strategies are shown. (orig.) 35 refs.
National Aeronautics and Space Administration — During the period of this project three different possible DC transformer concepts were proposed, theoretically modeled, and then experimentally tested with the...
Radiation Effects on DC-DC Converters
Zhang, De-Xin; AbdulMazid, M. D.; Attia, John O.; Kankam, Mark D. (Technical Monitor)
2001-01-01
In this work, several DC-DC converters were designed and built. The converters are Buck Buck-Boost, Cuk, Flyback, and full-bridge zero-voltage switched. The total ionizing dose radiation and single event effects on the converters were investigated. The experimental results for the TID effects tests show that the voltages of the Buck Buck-Boost, Cuk, and Flyback converters increase as total dose increased when using power MOSFET IRF250 as a switching transistor. The change in output voltage with total dose is highest for the Buck converter and the lowest for Flyback converter. The trend of increase in output voltages with total dose in the present work agrees with those of the literature. The trends of the experimental results also agree with those obtained from PSPICE simulation. For the full-bridge zero-voltage switch converter, it was observed that the dc-dc converter with IRF250 power MOSFET did not show a significant change of output voltage with total dose. In addition, for the dc-dc converter with FSF254R4 radiation-hardened power MOSFET, the output voltage did not change significantly with total dose. The experimental results were confirmed by PSPICE simulation that showed that FB-ZVS converter with IRF250 power MOSFET's was not affected with the increase in total ionizing dose. Single Event Effects (SEE) radiation tests were performed on FB-ZVS converters. It was observed that the FB-ZVS converter with the IRF250 power MOSFET, when the device was irradiated with Krypton ion with ion-energy of 150 MeV and LET of 41.3 MeV-square cm/mg, the output voltage increased with the increase in fluence. However, for Krypton with ion-energy of 600 MeV and LET of 33.65 MeV-square cm/mg, and two out of four transistors of the converter were permanently damaged. The dc-dc converter with FSF254R4 radiation hardened power MOSFET's did not show significant change at the output voltage with fluence while being irradiated by Krypton with ion energy of 1.20 GeV and LET of 25
Gair, S.; Eastham, J. F.; Canova, A.
1996-04-01
The article reports on a study of the effects of slot closure in axial-field permanent magnet brushless machines by a two-dimensional finite element method (2D FEM) of analysis. The closure of the slots is made by using soft magnetic powder wedge material. Parameter values and machine performance for the open and closed slot configuration are computed. In order to test the 2D FEM model, calculated results are compared with measurements and favorable agreement is shown.
Jingang Bai; Quanbin Zhao; Jing Zhao; Chengde Tong; Qian Wu; Ping Zheng
2012-01-01
A new type of brushless double rotor machine (BDRM) is proposed in this paper. The BDRM is an important component in compound-structure permanent-magnet synchronous machine (CS-PMSM) systems, which are promising for power-split hybrid electric vehicle (HEV) applications. The BDRM can realize the speed adjustment between claw-pole rotor and permanent-magnet rotor without brushes and slip rings. The structural characteristics of the BDRM are described and its magnetic circuit model is built. Re...
Institute of Scientific and Technical Information of China (English)
2013-01-01
Aimed at the problem of the trigger line and the silicon controlled rectifier for 590 DC internal excitation in actual use, proposed the application of the bridge rectification circuit instead of the complicated trigger and excitation control circuit in order to achieve the simple structure,voltage stability and low maintenance cost.% 针对590直流调速器内部励磁触发线路及可控硅整流模块在实际使用中的问题，提出应用桥堆整流电路替代复杂的触发与励磁控制线路，使励磁电源控制电路达到结构简单、电压稳定、维护成本低的目的。
基于 AVR 单片机的直流电机控制系统设计%Dc Motor Control System Based on AVR Single-chip Computer Design
Institute of Scientific and Technical Information of China (English)
姜颖韬
2013-01-01
MUC-controlled motor drive platform has been demanded widely in engineering field ,so the author designed a new scheme with AVR single chip microcomputer as main control chip .By using this scheme ,the motor drive platform has some advantages ,such as lightweight ,efficient ,low consumption ,good real-time performance ,which can be widely used in indus-trial and agricultural production ,civil life ,education ,scientific research and other fields .%针对在工程领域内具有广泛需求的MUC控制电动机驱动的动力平台，开发了一种以AVR单片机作为主控芯片的新方案。应用该方案设计的动力平台系统具有轻量化、高效低耗、实时性好等优点，可广泛应用于工农业生产、民用生活、教育科研等领域。
Design of High-current DC Motor Driver Based Upon LM5106%基于LM5106的大电流直流电机驱动设计
Institute of Scientific and Technical Information of China (English)
姚善浪; 施国梁
2014-01-01
Aimed to realize the driving of the high-cur-rent motor, the PIC single chip LM5106 acted as hardware, was applied as main processor to control the on-off of the MOSFET, start the motor and fulfill clockwise, counter clockwise rotating and braking relying on the excellent driving performance of the single chip while the software was in charge of the intelligent test and control onto the sys-tem, in which the PWM signal was used to implement the motor’s speed-regulation with various kind of acceleration curves.%为实现驱动大电流电机的目标，以PIC单片机主处理器作为硬件，利用L M5106良好驱动性能，控制MOSFET导通，实现电机起动、正反转以及制动等操作。软件主要解决对系统的智能检测与控制，以PWM信号生成来实现多种加速度曲线的调速。试验证明本系统具有驱动能力强，可控性良好等优点。
Radiation-Tolerant DC-DC Converters
Skutt, Glenn; Sable, Dan; Leslie, Leonard; Graham, Shawn
2012-01-01
A document discusses power converters suitable for space use that meet the DSCC MIL-PRF-38534 Appendix G radiation hardness level P classification. A method for qualifying commercially produced electronic parts for DC-DC converters per the Defense Supply Center Columbus (DSCC) radiation hardened assurance requirements was developed. Development and compliance testing of standard hybrid converters suitable for space use were completed for missions with total dose radiation requirements of up to 30 kRad. This innovation provides the same overall performance as standard hybrid converters, but includes assurance of radiation- tolerant design through components and design compliance testing. This availability of design-certified radiation-tolerant converters can significantly reduce total cost and delivery time for power converters for space applications that fit the appropriate DSCC classification (30 kRad).
SIMULATION MODELS OF HEAVY TRUCKS TRAFFIC CONTROL WITH ELECTRIC DC DRIVE
Directory of Open Access Journals (Sweden)
N. N. Hurski
2015-01-01
Full Text Available A model of the straight course of movement of the mobile machine with a traction electric motor DC. Traffic management controller provides a closed classical scheme with feedback. The mathematical model of the electric DC motor with the energy dissipation in the rotor bearings. Design scheme of mobile machines include speed dial controller, traction electric motor, gearbox, transmission and progressively moving mass on the elasticdissipative wheel. The results of the simulation of the machine in the form of temporary processes of change control signals, voltage and current in the windings of the motor and traction power developed on the wheel.
Lukemire, Alan T.
1995-05-01
A pulse-width modulated DC-to-DC power converter including a first inductor, i.e. a transformer or an equivalent fixed inductor equal to the inductance of the secondary winding of the transformer, coupled across a source of DC input voltage via a transistor switch which is rendered alternately conductive (ON) and nonconductive (OFF) in accordance with a signal from a feedback control circuit is described. A first capacitor capacitively couples one side of the first inductor to a second inductor which is connected to a second capacitor which is coupled to the other side of the first inductor. A circuit load shunts the second capacitor. A semiconductor diode is additionally coupled from a common circuit connection between the first capacitor and the second inductor to the other side of the first inductor. A current sense transformer generating a current feedback signal for the switch control circuit is directly coupled in series with the other side of the first inductor so that the first capacitor, the second inductor and the current sense transformer are connected in series through the first inductor. The inductance values of the first and second inductors, moreover, are made identical. Such a converter topology results in a simultaneous voltsecond balance in the first inductance and ampere-second balance in the current sense transformer.
Institute of Scientific and Technical Information of China (English)
王铮; 刘卫国; 焦宁飞; 杨南方
2012-01-01
In allusion to aero brushless synchronous starter/generator system, the characteristics of the excitation system were researched under the single-phase AC excitation condition. Under the single-phase AC excitation condition, the output voltage characteristic of the magnetizing exciter was analyzed in stationary state by using the finite element analysis method. The main generator excitation characteristic was also studied, and the generator optimal excitation condition was found and verified by experiment. In rotating state, the characteristic of the main generator excitation was analyzed under the single-phase AC excitation condition and DC excitation condition respectively. By comparing the DC and AC excitation characteristic curve, the optimal speed range for AC/DC switching was obtained.%针对航空无刷同步起动／发电机,进行了单相交流励磁下励磁系统的特性研究.利用有限元仿真分析方法,对单相励磁下励磁机静止时的电压输出特性进行研究,并探讨主发电机的励磁特性,寻求主发电机最优励磁条件并通过试验进行验证；开展旋转状态下交流和直流励磁时主发电机励磁特性分析；通过对比直流励磁特性曲线与交流励磁特性曲线,得到励磁机交／直流励磁最优切换区间.
Institute of Scientific and Technical Information of China (English)
王归新; 裴合伟; 晓琼; 鲜万春
2012-01-01
In high power application, wound AC motor rotor loop cascade control system has very good speed performance and energy-saving effect. Based on the analysis that the equivalent internal impedance of three-phase rectifier bridge influence rectifier output,rectifier bridge and follow-up circuit equivalent to the mo-tor rotor loop resistance, inferred to the mechanical characteristics in the cascade control system.Came to con-clusion that two influence factors for mechanical characteristics. The rotor loop equivalent impedance is more serious than rotor leakage reactance effect commutation overlap angle to mechanical characteristics influence. The simulation and the experiment verify the theory.%绕线转子式交流电机转子回路串级调速系统具有很好的调速性能和节电效果,在中大功率领域应用较多.基于对三相整流电路电源等效内阻抗对桥路整流输出的影响分析,将整流桥及其后续电路等效为电机转子回路的电阻,推导出在有串级调速系统下电机的机械特性,得出了影响电机机械特性的两方面因素,其中转子回路的等效阻抗对机械特性的影响相对于转子漏抗影响换相重叠角对机械特性的影响尤为严重的结论.仿真结果证实了理论推导的结论,并进行了实验验证.
DEFF Research Database (Denmark)
Zhang, Xiaoxu; Liu, Xiao; Chen, Zhe
2015-01-01
into several regions, i.e., magnet, air-gaps, slot-openings, and slots. The numerical solution could be obtained by applying the boundary constraints on the interfaces between these regions. The accuracy of the proposed analytical model is verified by comparing the no-load magnetic field and armature reaction...
Walkhoff, Lutz-Ruediger
1989-12-01
With the utilization of high value magnets with stiff magnetization, it is possible to establish a 3-D, analytic field calculation process in which the influence of the permeability is taken into account. The process is based on the reflection laws for the scalar magnetic potential and allows examination of the influence of the permeability on the profile of the induction in gap. The inductivity of the windings is approximately obtained with the magnetic field of the stator windings, that is found three dimensionally in the winding area. Since the permanent magnet material used is a good electrical conductor, eddy current losses can appear in the magnet with phase currents. For the first losses estimation, the stationary stator field in the magnet area was calculated. The induction in the rotor is relatively low for maximal currents so that only very minimal losses occur. The dissipation was calculated with the Paynting vector from the vector potential.
Intelligent dc-dc Converter Technology Developed and Tested
Button, Robert M.
2001-01-01
The NASA Glenn Research Center and the Cleveland State University have developed a digitally controlled dc-dc converter to research the benefits of flexible, digital control on power electronics and systems. Initial research and testing has shown that conventional dc-dc converters can benefit from improved performance by using digital-signal processors and nonlinear control algorithms.
The Trail Inventory of DC Booth Historic NFH [Cycle 2
US Fish and Wildlife Service, Department of the Interior — The purpose of this report is to create a baseline inventory of all non-motorized trails on D.C. Booth Historic National Fish Hatchery. Trails in this inventory are...
Research on an Axial Magnetic-Field-Modulated Brushless Double Rotor Machine
Directory of Open Access Journals (Sweden)
Bin Yu
2013-09-01
Full Text Available Double rotor machine, an electronic continuously variable transmission, has great potential in application of hybrid electric vehicles (HEVs, wind power and marine propulsion. In this paper, an axial magnetic-field-modulated brushless double rotor machine (MFM-BDRM, which can realize the speed decoupling between the shaft of the modulating ring rotor and that of the permanent magnet rotor is proposed. Without brushes and slip rings, the axial MFM-BDRM offers significant advantages such as excellent reliability and high efficiency. Since the number of pole pairs of the stator is not equal to that of the permanent magnet rotor, which differs from the traditional permanent magnet synchronous machine, the operating principle of the MFM-BDRM is deduced. The relations of corresponding speed and toque transmission are analytically discussed. The cogging toque characteristics, especially the order of the cogging torque are mathematically formulated. Matching principle of the number of pole pairs of the stator, that of the permanent magnet rotor and the number of ferromagnetic pole pieces is inferred since it affects MFM-BDRM’s performance greatly, especially in the respect of the cogging torque and electromagnetic torque ripple. The above analyses are assessed with the three-dimensional (3D finite-element method (FEM.
大功率高速比直流电机设计简介%Brief of Design of the Large-size DC Motor with High Speed-regulation Ratio
Institute of Scientific and Technical Information of China (English)
陶宝英
2014-01-01
The single stack of different-slot armature winding with equalizing line and block brush was applied in the design of 2 000 kW motor with high speed-regulation ratio, to improve the commutation performance;the down-ward-pressure weftless tape was employed in the end wind-ing structure, to ift with the high-speed operation;the radial ventilation was furnished in the armature shaft and inclined air guide plate was welded between the shafts to enhance the cooling and ventilating effectiveness of the armature.%在2000 kW高速比直流电机电磁设计中，采用带均压线的单叠异槽式电枢绕组和分块电刷等，来提高电机的换向性能；绕组端部采用下压式无纬带结构，以满足电机的高速运行；电枢铁心采用径向通风，在转轴筋之间焊接倾斜导风板，以提高电枢通风冷却效果。
Directory of Open Access Journals (Sweden)
Boumediène Allaoua
2013-01-01
Full Text Available The development of electric vehicles power electronics system control comprising of DC-AC inverters and DC-DC converters takes a great interest of researchers in the modern industry. A DC-AC inverter supplies the high power electric vehicle motors torques of the propulsion system and utility loads, whereas a DC-DC converter supplies conventional low-power, low-voltage loads. However, the need for high power bidirectional DC-DC converters in future electric vehicles has led to the development of many new topologies of DC-DC converters. Nonlinear control of power converters is an active area of research in the fields of power electronics. This paper focuses on a fuzzy sliding mode strategy (FSMS as a control strategy for boost DC-DC converter power supply for electric vehicle. The proposed fuzzy controller specifies changes in the control signal based on the surface and the surface change knowledge to satisfy the sliding mode stability and attraction conditions. The performances of the proposed fuzzy sliding controller are compared to those obtained by a classical sliding mode controller. The satisfactory simulation results show the efficiency of the proposed control law which reduces the chattering phenomenon. Moreover, the obtained results prove the robustness of the proposed control law against variation of the load resistance and the input voltage of the studied converter.
Control of a Dual-Stator Flux-Modulated Motor for Electric Vehicles
Directory of Open Access Journals (Sweden)
Xinhua Guo
2016-07-01
Full Text Available This paper presents the control strategies for a novel dual-stator flux-modulated (DSFM motor for application in electric vehicles (EVs. The DSFM motor can be applied to EVs because of its simple winding structure, high reliability, and its use of two stators and rotating modulation steels in the air gap. Moreover, it outperforms conventional brushless doubly-fed machines in terms of control performance. Two stator-current-oriented vector controls with different excitation in the primary winding, direct and alternating current excitation, are designed, simulated, and evaluated on a custom-made DSFM prototype allowing the decoupled control of torque. The stable speed response and available current characteristics strongly validate the feasibility of the two control methods. Furthermore, the proposed control methods can be employed in other applications of flux-modulated motors.
A high efficiency motor/generator for magnetically suspended flywheel energy storage system
Niemeyer, W. L.; Studer, P.; Kirk, J. A.; Anand, D. K.; Zmood, R. B.
1989-01-01
The authors discuss the theory and design of a brushless direct current motor for use in a flywheel energy storage system. The motor design is optimized for a nominal 4.5-in outside diameter operating within a speed range of 33,000-66,000 revolutions per minute with a 140-V maximum supply voltage. The equations which govern the motor's operation are used to compute a series of acceptable design parameter combinations for ideal operation. Engineering tradeoffs are then performed to minimize the irrecoverable energy loss while remaining within the design constraint boundaries. A final integrated structural design whose features allow it to be incorporated with the 500-Wh magnetically suspended flywheel is presented.
Three-port DC-DC converter with new integrated transformer for DC Distribution Systems
DEFF Research Database (Denmark)
Ouyang, Ziwei; Andersen, Michael A. E.
2014-01-01
A new integrated transformer for three-port dc-dc converter is proposed to overcome the power coupling effect existed in some known multiple inputs dc-dc converters. Orthogonal primary windings arrangement and in series connection of diagonal secondary Windings enables a fully power decoupling...
Institute of Scientific and Technical Information of China (English)
邱忠才; 魏振兴; 肖建; 葛艳华
2014-01-01
A DC bus reciprocal power -fed testing system based on the incremental photoelectric encoder was de -signed in this paper,which included a double inverter and a double permanent magnet synchronous motor (PMSM) withid being 0 vector control.The construction and working principle of this system were discussed , and then the hard-ware design and the technological process of software control were proposed in this paper .The experimental results verified that this experiment system had excellent dynamic and static performances and ideal control effects , which could provide a very good research platform for the study of the PMSM control .%设计了基于增量式光电编码器，采用 id 等于0矢量控制双逆变器双永磁同步电机直流母线能量互馈牵引试验系统。讨论了整个系统的组成和运行原理，给出了硬件设计与软件控制流程。实验结果证明该系统具有良好的静、动态性能和比较理想的控制效果，可以为永磁同步电机控制研究提供研究平台。
Laplane, D.; Degos, J D
1983-01-01
Motor neglect is characterised by an underutilisation of one side, without defects of strength, reflexes or sensibility. Twenty cases of frontal, parietal and thalamic lesions causing motor neglect, but all without sensory neglect, are reported. It is proposed that the cerebral structures involved in motor neglect are the same as those for sensory neglect and for the preparation of movement. As in sensory neglect, the multiplicity of the structures concerned suggests that this interconnection...
DC-DC powering for the CMS pixel upgrade
Feld, Lutz; Fleck, Martin; Friedrichs, Marcel; Hensch, Richard; Karpinski, Waclaw; Klein, Katja; Rittich, David; Sammet, Jan; Wlochal, Michael
2013-12-01
The CMS experiment plans to replace its silicon pixel detector with a new one with improved rate capability and an additional detection layer at the end of 2016. In order to cope with the increased number of detector modules the new pixel detector will be powered via DC-DC converters close to the sensitive detector volume. This paper reviews the DC-DC powering scheme and reports on the ongoing R&D program to develop converters for the pixel upgrade. Design choices are discussed and results from the electrical and thermal characterisation of converter prototypes are shown. An emphasis is put on system tests with up to 24 converters. The performance of pixel modules powered by DC-DC converters is compared to conventional powering. The integration of the DC-DC powering scheme into the pixel detector is described and system design issues are reviewed.
DC-DC Powering for the CMS Pixel Upgrade
Feld, Lutz Werner; Marcel Friedrichs; Richard Hensch; Karpinski, Waclaw; Klein, Katja; Rittich, David Michael; Sammet, Jan Domenik; Wlochal, Michael
2013-01-01
The CMS experiment plans to replace its silicon pixel detector with a new one with improved rate capability and an additional detection layer at the end of 2016. In order to cope with the increased number of detector modules the new pixel detector will be powered via DC-DC converters close to the sensitive detector volume. This paper reviews the DC-DC powering scheme and reports on the ongoing R and D program to develop converters for the pixel upgrade. Design choices are discussed and results from the electrical and thermal characterisation of converter prototypes are shown. An emphasis is put on system tests with up to24 converters. The performance of pixel modules powered by DC-DC converters is compared to conventional powering. The integration of the DC-DC powering scheme into the pixel detector is described and system design issues are reviewed.
Evaluation of Retrofit Variable-Speed Furnace Fan Motors
Energy Technology Data Exchange (ETDEWEB)
Aldrich, R. [Consortium for Advanced Residential Buildings (CARB), Norwalk, CT (United States); Williamson, J. [Consortium for Advanced Residential Buildings (CARB), Norwalk, CT (United States)
2014-01-01
In conjunction with the New York State Energy Research and Development Authority (NYSERDA) and Proctor Engineering Group, Ltd. (PEG), the Consortium for Advanced Residential Buildings (CARB) has evaluated the Concept 3™ replacement motors for residential furnaces. These brushless, permanent magnet (BPM) motors can use much less electricity than their PSC (permanent split capacitor) predecessors. This evaluation focuses on existing homes in the heating-dominated climate of upstate New York with the goals of characterizing field performance and cost effectiveness. The project includes eight homes in and near Syracuse, NY. Tests and monitoring was performed both before and after fan motors were replaced. Results indicate that BPM replacement motors will be most cost effective in HVAC systems with longer run times and relatively low duct static pressures. More dramatic savings are possible if occupants use the fan-only setting when there is no thermal load. There are millions of cold-climate, U.S. homes that meet these criteria, but the savings in most homes tested in this study were modest.