Teaching about operation of brushless DC motors
Čufar, Aleksandra
2013-01-01
Brush DC motor is being replaced by brushless DC motors on every area of application. My diploma thesis is a presentation of brushless DC motor, how it works and its application. Within first part we describe various electric motors and their application. There are several types of electric motors division. Last to be added is a brushless motor. Within second part of thesis we look into a brushless DC motor, how it works, its application and control. In the third part of thesis we construct a...
Motor control for a brushless DC motor
Peterson, William J. (Inventor); Faulkner, Dennis T. (Inventor)
1985-01-01
This invention relates to a motor control system for a brushless DC motor having an inverter responsively coupled to the motor control system and in power transmitting relationship to the motor. The motor control system includes a motor rotor speed detecting unit that provides a pulsed waveform signal proportional to rotor speed. This pulsed waveform signal is delivered to the inverter to thereby cause an inverter fundamental current waveform output to the motor to be switched at a rate proportional to said rotor speed. In addition, the fundamental current waveform is also pulse width modulated at a rate proportional to the rotor speed. A fundamental current waveform phase advance circuit is controllingly coupled to the inverter. The phase advance circuit is coupled to receive the pulsed waveform signal from the motor rotor speed detecting unit and phase advance the pulsed waveform signal as a predetermined function of motor speed to thereby cause the fundamental current waveform to be advanced and thereby compensate for fundamental current waveform lag due to motor winding reactance which allows the motor to operate at higher speeds than the motor is rated while providing optimal torque and therefore increased efficiency.
Constant Current Models of Brushless DC Motor
Krykowski, Krzysztof; Hetmańczyk, Janusz
2013-01-01
Two constant current models of Permanent Magnet Brushless Direct Current Motor (PM BLDC) are presented in the paper. In the first part of the paper principle of operation, basic properties and mathematical equations describing PM BLDC models are given. Then, two different constant current models of PM BLDC motor are considered: In the first model, PM BLDC motor is approximated with dc motor; in the second model, modified constant current model is applied with additional block, which is used t...
Brushless dc motor uses electron beam switching tube as commutator
Studer, P.
1965-01-01
Electron beam switching tube eliminates physical contact between rotor and stator in brushless dc motor. The tube and associated circuitry control the output of a dc source to sequentially energize the motor stator windings.
High speed DC brushless motor controlled by microntroller
International Nuclear Information System (INIS)
The paper presents an example of DC Brushless motor used to rotate high vacuum turbo molecular pumps. Both the motor and the electronic drive system, controlled by microcontroller PIC16F877, are designed and made in our institute. DC Brushless motors are one of the motor types which have had the fastest development. This type of motor is especially used in industries such as Industrial Automation Equipment and Instrumentation, Medical, Automotive etc. DC Brushless motors do not use brushes for commutation of the current. The phase of the motor are electronically commutated. Comparative with DC Brushed motors and induction motors, DC Brushless motors have the followings advantages: -high speed ranges; - long operating life; - high efficiency; -better speed versus torque characteristics; - high dynamic response; - noiseless operation; Also, the ratio of torque provided to the size of the motor is higher, making it useful in applications where space and weight are limited. (authors)
Integrated-Circuit Controller For Brushless dc Motor
Le, Dong Tuan
1994-01-01
Generic circuit performs commutation-logic and power-switching functions for control of brushless dc motor. Controller includes commutation-logic and associated control circuitry, power supply, and inverters containing power transistors. Major advantages of controller are size, weight, and power consumption can be made less than other brushless-dc-motor controllers.
Sensorless starting of a brushless D.C. motor
Ghosh, Ramit
1988-01-01
Permanent magnet brushless DC motors that have found wide application in high performance servo drives need absolute rotor position sensors. However, the cost of the position sensor limits the use of brush less DC motors for low performance applications such as automotive and home appliances. A sensorless starting scheme for brushless DC motors is studied in this thesis. A hardware implementation of the starting scheme has been instrumented. The modeling and simulation of the ...
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.
Simulation of Brushless DC Motor using Direct Torque Control
Mrs.G. Kusuma; S. Rukhsana Begum
2014-01-01
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 o...
Brushless DC motor Drive during Speed regulation with Current Controller
Bhikshalu Manchala; T.Amar Kiran
2015-01-01
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...
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BRUSHLESS DC MOTOR BASED ON A COMMON DC SIGNAL
J.Karthikeyan; Dr.R.Dhanasekaran
2010-01-01
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 whic...
Tachometers Derived From a Brushless DC Motor
Howard, David E.; Smith, Dennis A.
2007-01-01
The upper part of the figure illustrates the major functional blocks of a direction-sensitive analog tachometer circuit based on the use of an unexcited two-phase brushless dc motor as a rotation transducer. The primary advantages of this circuit over many older tachometer circuits include the following: Its output inherently varies linearly with the rate of rotation of the shaft. Unlike some tachometer circuits that rely on differentiation of voltages with respect to time, this circuit relies on integration, which results in signals that are less noisy. There is no need for an additional shaft-angle sensor, nor is there any need to supply electrical excitation to a shaft-angle sensor. There is no need for mechanical brushes (which tend to act as sources of electrical noise). The underlying concept and electrical design are relatively simple. This circuit processes the back-electromagnetic force (back-emf) outputs of the two motor phases into a voltage directly proportional to the instantaneous rate (sign magnitude) of rotation of the shaft. The processing in this circuit effects a straightforward combination of mathematical operations leading to a final operation based on the well-known trigonometric identity (sin x)2 + (cos x)2 = 1 for any value of x. The principle of operation of this circuit is closely related to that of the tachometer circuit described in Tachometer Derived From Brushless Shaft-Angle Resolver (MFS-28845), NASA Tech Briefs, Vol. 19, No. 3 (March 1995), page 39. However, the present circuit is simpler in some respects because there is no need for sinusoidal excitation of shaftangle- resolver windings.
Mathematical modeling of electromechanical processes in a brushless DC motor
Tkachuk, V. I.; V.I. Zhuk
2014-01-01
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.
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.
System For Characterizing Three-Phase Brushless dc Motors
Howard, David E.; Smith, Dennis A.
1996-01-01
System of electronic hardware and software developed to automate measurements and calculations needed to characterize electromechanical performances of three-phase brushless dc motors, associated shaft-angle sensors needed for commutation, and associated brushless tachometers. System quickly takes measurements on all three phases of motor, tachometer, and shaft-angle sensor simultaneously and processes measurements into performance data. Also useful in development and testing of motors with not only three phases but also two, four, or more phases.
Three-phase Brushless DC Motor Control
Fang, Xinwei
2012-01-01
With the increasing demand of using electric power and unpleasant of using brush motor; the usage of Three-phase Brushless Motor has been significantly developed in industry. However, with market-standard motor driver, there are many inconveniences for small institutions or companies in either application developments or education purposes. For instance, the size and the price of driver. Therefore, the object of this thesis was design modular sections (Software program, PCB driver and PCB con...
Controller for computer control of brushless dc motors. [automobile engines
Hieda, L. S. (Inventor)
1981-01-01
A motor speed and torque controller for brushless d.c. motors provides an unusually smooth torque control arrangement. The controller provides a means for controlling a current waveform in each winding of a brushless dc motor by synchronization of an excitation pulse train from a programmable oscillator. Sensing of torque for synchronization is provided by a light beam chopper mounted on the motor rotor shaft. Speed and duty cycle are independently controlled by controlling the frequency and pulse width output of the programmable oscillator. A means is also provided so that current transitions from one motor winding to another is effected without abrupt changes in output torque.
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.
Brushless DC Motor Speed Control Based on Emotional Intelligent Controller
Gholamreza ArabMarkadeh; Ehsan Drayabeigi
2014-01-01
This paper presents an emotional controller for brushless DC motor (BLDC) drive. The proposed controller is called brain emotional learning based intelligent controller (BELBIC). The utilization of the new controller is based on the emotion processing mechanism in brain. This intelligent control is inspired by the limbic system of mammalian brain, especially amygdala. The controller is successfully implemented in simulation using MATLAB software, brushless dc drive with trapezoidal back-emf. ...
Digital current loop control of a brushless DC motor
Cox, Noel Patrick
1987-01-01
Servo control of motors has important applications m such areas as robotics, numerically controlled machines and 'fly by wire* aircraft systems. The development of high power high coercivity magnetic alloys, such as samarium cobalt, has led to the advent of the brushless dc machine, which offers a more advantageous alternative to the brush machine. The brushless DC machine eliminates the need for brush contacts, through the use of electronic commutation. It has better thermal charact...
Improved Rotor Speed Brushless DC Motor Using Fuzzy Controller
Jafar Mostafapour; Jafar Reshadat; Murtaza Farsadi
2015-01-01
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...
A brushless dc spin motor for momentum exchange altitude control
Stern, D.; Rosenlieb, J. W.
1972-01-01
Brushless dc spin motor is designed to use Hall effect probes as means of revolving rotor position and controlling motor winding currents. This results in 3 to 1 reduction in watt-hours required for wheel acceleration, a 2 to 1 reduction in power to run wheel, and a 10 to 1 reduction in the electronics size and weight.
Brushless dc motors. [applications in non-space technology
1975-01-01
Brushless dc motors were intensively developed and tested over several years before qualification as the prime movers for Apollo Spacecraft life support blowers, and for circulating oxygen in the lunar portable life support system. Knowledge gained through prototype development and critical testing has significantly influenced the technology employed, broadened markets and applications, and reduced the cost of present day motors.
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.
Simplified Design Methodology for a Slotless Brushless DC Motor
Markovic, Miroslav; Perriard, Yves
2006-01-01
The paper presents a simplified analytical method to design a small two-pole slotless brushless dc motor. Using only a few approximations, the motor analytical model is formulated to generate a system of equations. The system can be solved analytically, producing a motor design for given specifications. The method is used to design a motor with the specifications 150 W, 10'000 rpm, and 18 V.
Pulse-Width-Modulating Driver for Brushless dc Motor
Salomon, Phil M.
1991-01-01
High-current pulse-width-modulating driver for brushless dc motor features optical coupling of timing signals from low-current control circuitry to high-current motor-driving circuitry. Provides high electrical isolation of motor-power supply, helping to prevent fast, high-current motor-driving pulses from being coupled through power supplies into control circuitry, where they interfere with low-current control signals.
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.
Adaptive position controller for double armature brushless dc linear motor
Energy Technology Data Exchange (ETDEWEB)
Demirci, R. [Abant Izzet Baysal Univ., Technical Education Faculty, Electrical Dept., Dunez (Turkey); Dursun, M. [Gazi University, Technical Education Faculty, Electrical Dept., Ankara (Turkey)
2000-08-01
An adaptive position controller has been proposed for double armature brushless DC linear motor. The proposed position control system comprises an inner model reference adaptive velocity control loop and an outer position control loop. The parameters of the adaptive controller have been adjusted by using modified gradient type parameter adaptation algorithm. (orig.)
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...
Speed Control of an Eleven-Phase Brushless DC Motor
Morteza Azadi; Ahmad Darabi
2013-01-01
In this paper, an eleven-phase permanent magnet brushless DC motor fed by an eleven-leg two-level inverter is modeled and simulated. In order to produce trapezoidal back electromotive force waveforms by permanent magnet rotor, the motor has concentrated stator windings. The motor speed is controlled by Mamdani-type fuzzy incremental controller. The hysteresis modulation is used for switching operation. The simulation is carried out by Matlab/Simulink.
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
Simulation and performance of brushless DC motor actuators
Gerba, Alex
1985-01-01
The simulation model for a Brushless D.C. Motor and the associated commutation power conditioner transistor model are presented. The necessary conditions for maximum power output while operating at steady-state speed and sinusoidally distributed air-gap flux are developed. Comparisons of simulated model with the measured performance of a typical motor are done both on time response waveforms and on average performance characteristics. These preliminary results indicate good ...
System of control of brushless DC motors using CPLD
Sivkov Stepan Igorevich; Novikov Leonid Grigorievich
2012-01-01
The developed system of control of brushless DC (BLDC) motors is realized on the complex pro-grammable logic device (CPLD). Using CPLD reduces the power consumption required for calculation the control vector and also the cost of the system. As opposed to the modern systems of control of BLDC motors, the given system uses only two Hall’s sensors. The control circuit is based on the operators of the logical signal convolution that significantly reduces power consumption during the formation of...
Controller for a High-Power, Brushless dc Motor
Fleming, David J.; Makdad, Terence A.
1987-01-01
Driving and braking torques controllable. Control circuit operates 7-kW, 45-lb-ft (61-N-m), three-phase, brushless dc motor in both motor and generator modes. In motor modes, energy from power source is pulse-width modulated to motor through modified "H-bridge" circuit, in generator mode, energy from motor is pulse-width modulated into bank of load resistors to provide variable braking torques. Circuit provides high-resolution torque control in both directions over wide range of speeds and torques. Tested successfully at bus voltages up to 200 Vdc and currents up to 45 A.
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.
Optimal brushless DC motor design using genetic algorithms
Rahideh, A.; Korakianitis, T.; Ruiz, P.; Keeble, T.; Rothman, M. T.
2010-11-01
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using a genetic algorithm. 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. Electrical and mechanical requirements (i.e. voltage, torque and speed) and other limitations (e.g. upper and lower limits of the motor geometries) are cast into constraints of the optimization problem. One sample case is used to illustrate the design and optimization technique.
Optimal brushless DC motor design using genetic algorithms
International Nuclear Information System (INIS)
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using a genetic algorithm. 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. Electrical and mechanical requirements (i.e. voltage, torque and speed) and other limitations (e.g. upper and lower limits of the motor geometries) are cast into constraints of the optimization problem. One sample case is used to illustrate the design and optimization technique.
Optimal brushless DC motor design using genetic algorithms
Energy Technology Data Exchange (ETDEWEB)
Rahideh, A. [Department of Engineering, Queen Mary, University of London, London E1 4NS (United Kingdom); Korakianitis, T., E-mail: korakianitis@alum.mit.ed [Department of Engineering, Queen Mary, University of London, London E1 4NS (United Kingdom); Ruiz, P. [Department of Engineering, Queen Mary, University of London, London E1 4NS (United Kingdom); Keeble, T.; Rothman, M.T. [Cardiac Research and Development, Barts and the London NHS Trust, The London Chest Hospital, London E2 9JX (United Kingdom)
2010-11-15
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using a genetic algorithm. 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. Electrical and mechanical requirements (i.e. voltage, torque and speed) and other limitations (e.g. upper and lower limits of the motor geometries) are cast into constraints of the optimization problem. One sample case is used to illustrate the design and optimization technique.
Fuzzy Logic Based Controller for Brushless DC Motor
Trinayani Chittajallu
2012-01-01
In this paper, a model of a three phase star – connected brushless direct current (BLDC) motor is presented. The state-space model for a BLDC motor is derived and is implemented using Matlab/Simulink. Torque and Speed control is applied using hysteresis band control and variable DC-link voltage control. The different control strategies are tested on the BLDC motor and their performance is evaluated. A Fuzzy Logic Controller(FLC) is also developed to control the torque and speed of BLDC motor ...
Digital Signal Controller Based Digital Control of Brushless DC Motor
Anjana Elizabeth Thomas; Salim Paul
2013-01-01
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 o...
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
Control and Diagnostic Model of Brushless Dc Motor
Abramov, Ivan V.; Nikitin, Yury R.; Abramov, Andrei I.; Sosnovich, Ella V.; Božek, Pavol
2014-09-01
A simulation model of brushless DC motor (BLDC) control and diagnostics is considered. The model has been developed using a freeware complex "Modeling in technical devices". Faults and diagnostic parameters of BLDC are analyzed. A logicallinguistic diagnostic model of BLDC has been developed on basis of fuzzy logic. The calculated rules determine dependence of technical condition on diagnostic parameters, their trends and utilized lifetime of BLDC. Experimental results of BLDC technical condition diagnostics are discussed. It is shown that in the course of BLDC degradation the motor condition change depends on diagnostic parameter values
The Model of Brushless Dc Motor Drive
Aurelijus Pitrėnas
2013-01-01
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 implem...
The Model of Brushless Dc Motor Drive
Directory of Open Access Journals (Sweden)
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
Energy Technology Data Exchange (ETDEWEB)
NONE
2000-01-10
For use in household use inverters, Fuji Electric has developed a brushless DC motor using a new main circuit system to attempt reducing the number of semiconductor elements in the inverter section. The figure shows the main circuitry composed of four semiconductor elements in the inverter section. This circuit is characterized in that the third phase of the motor is outputted from the neutral point potential in the DC intermediate circuit, realizing improved efficiency because of reduction in the number of semiconductor elements. Furthermore, the system is capable of realizing the PAM controlled operation from an operation zone with lower speed than in conventional ordinary inverter systems using six semiconductor elements. Thus, switching loss can be reduced in the inverter section during low speed operation of the brushless DC motor, and carrier loss in the motor can also be reduced. From the results of the Fuji Electric's experiments, an overall efficiency is now improved higher by up to about 25% than the conventional system. (translated by NEDO)
Hall effect encoding of brushless dc motors
Berard, C. A.; Furia, T. J.; Goldberg, E. A.; Greene, R. C.
1970-01-01
Encoding mechanism integral to the motor and using the permanent magnets embedded in the rotor eliminates the need for external devices to encode information relating the position and velocity of the rotating member.
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.
Brushless DC Motor Speed Control Based on Emotional Intelligent Controller
Directory of Open Access Journals (Sweden)
Gholamreza ArabMarkadeh
2014-03-01
Full Text Available This paper presents an emotional controller for brushless DC motor (BLDC drive. The proposed controller is called brain emotional learning based intelligent controller (BELBIC. The utilization of the new controller is based on the emotion processing mechanism in brain. This intelligent control is inspired by the limbic system of mammalian brain, especially amygdala. The controller is successfully implemented in simulation using MATLAB software, brushless dc drive with trapezoidal back-emf. In this work, a novel and simple implementation of BLDC motor drive system is achieved by using the intelligent controller, which controls the motor speed accurately. This emotional intelligent controller has simple structure with high auto learning feature. Simulation results show that both accurate steady state and fast transient speed responses can be achieved in wide range of speed from 20 to 300 [rpm]. Moreover, to evaluate this emotional controller, the performance of the proposed control scheme is compared with both Fuzzy Logic (FL and PID controllers, in different conditions. This indicates proper operating in comparison to the FLC and PID controllers. And also shows excellent promise for industrial scale utilization.
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.
Brushless DC micro-motor with external rotor
International Nuclear Information System (INIS)
The increasing use of high-tech electronic components has led researchers to try new solutions in the field of micro-scale electrical machinery. One such solution, described in this paper, consists of the substitution of a conventional mechanical commutator with an electronic type so as to allow the conversion of a electromagnetic micro-motor into a brushless version using permanent magnets. The comparison of the two micro-motor alternatives evidences the clear superiority of the brushless micro-motor
Low speed phaselock speed control system. [for brushless dc motor
Fulcher, R. W.; Sudey, J. (Inventor)
1975-01-01
A motor speed control system for an electronically commutated brushless dc motor is provided which includes a phaselock loop with bidirectional torque control for locking the frequency output of a high density encoder, responsive to actual speed conditions, to a reference frequency signal, corresponding to the desired speed. The system includes a phase comparator, which produces an output in accordance with the difference in phase between the reference and encoder frequency signals, and an integrator-digital-to-analog converter unit, which converts the comparator output into an analog error signal voltage. Compensation circuitry, including a biasing means, is provided to convert the analog error signal voltage to a bidirectional error signal voltage which is utilized by an absolute value amplifier, rotational decoder, power amplifier-commutators, and an arrangement of commutation circuitry.
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.
PID control of brushless DC motor and robot trajectory planning simulation with MATLAB®/SIMULINK®
Oguntoyinbo, Oludayo
2009-01-01
This report presents a PID model of a brushless dc (BLDC) motor and a robot trajectory planning and simulation. A short description of the brushless dc motor is given. For this work, mathematical models were developed and subsequently used in getting the simulation parameters. The PID model is accomplished with the use of MATLAB®/SIMULINK®. The operational parameters of the specific BLDC motor were modelled using the tuning methods which are used to develop subsequent simulations. The best PI...
Tuning of PID Controller for A Linear Brushless DC Motor using Swarm Intelligence Technique
Pooja Sharma; Rajeev Gupta
2014-01-01
An Optimal Design of PID Controller is proposed in this paper. The Methodology of PSO Algorithm is utilized to search the optimal parameters of Proportional Integral Derivative (PID) Controller for BLDC Motor. PSO is an Evolutionary Optimization Technique. A Linear Brushless DC Motors are known for higher efficiency and lower maintenance. The Brushless DC Motor is modeled in Simulink & tuning of PID controller using PSO is implemented in MATLAB. This Method was more efficient ...
Modeling and Analysis of PI Controller Based Speed Control of Brushless DC Motor Drive.
Mr.P.Nagasekhar Reddy
2013-01-01
The Brushless DC motors (BLDC) find widespread applications in domestic and industries due to their low and high power density and ease of speed control. To accomplish desired level of performance the motor requires suitable speed controllers. In case of permanent magnet Brushless DC motors, usually control of speed is reached by using proportional integral (PI) controller. Although the conventional PI controllers are widely used in the industry due to their simple control structure and ease ...
Tuning of PID Controller for A Linear Brushless DC Motor using Swarm Intelligence Technique
Directory of Open Access Journals (Sweden)
Pooja Sharma,
2014-05-01
Full Text Available An Optimal Design of PID Controller is proposed in this paper. The Methodology of PSO Algorithm is utilized to search the optimal parameters of Proportional Integral Derivative (PID Controller for BLDC Motor. PSO is an Evolutionary Optimization Technique. A Linear Brushless DC Motors are known for higher efficiency and lower maintenance. The Brushless DC Motor is modeled in Simulink & tuning of PID controller using PSO is implemented in MATLAB. This Method was more efficient for Step Response Characteristics.
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BRUSHLESS DC MOTOR BASED ON A COMMON DC SIGNAL
Directory of Open Access Journals (Sweden)
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.
A new surface-inset, permanent-magnet, brushless dc motor drive for electric vehicles
J. Gan; Chau, KT; Chan, CC; Jiang, JZ
2000-01-01
A new five-phase, surface-inset, permanent-magnet (PM), brushless dc motor drive is proposed in this paper. The motor drive has advantages of both the PM brushless dc motor drive and the dc series motor drive. The originlity is that the air-gap flux of the motor is generated by both the PM excitation and the specially controlled stator currents (two particular phases) under the same PM pole. The motor configuration and principle of operation are so unusual that the magnetic field distribution...
A DC brushless PM motor driven photovoltaic water pumping system
Energy Technology Data Exchange (ETDEWEB)
Yu, Shijie; Xie, Lei; He, Huiruo; Zhang, Hualin; Zhou, Longhua; Liu, Wen [Sun Yat-sen Univ., Zhuhai (China). Inst. of Power Electronics and Control Technology
2008-07-01
Along with the worldwide more attention to environment and rapid development of photovoltaic industry, the PV water pumping system has rapidly developed, the economic advantage of which brings it into prominence. It was estimated, up to now the operating PV water pumping systems in the world may exceed hundreds thousand sets and with a driving increasing tendency. In many cases the distributed stations gain the advantages over PV feed-in grid-connected pump. The majority of the PV pumping systems are driven by an ac asynchronous motor, which are generally of lower efficiency, especially for small-scale systems. A dc permanent magnetic, brushless, sensorless and casting resin motor are developed and used in PV water pumping systems, the experiments and operations of 19 demonstrative stations in Guangdong show that the results on economics and reliability are excited. It can save even 15% {proportional_to} 20% PV modules in comparison with an asynchronous motor driven under same sunshine, water head and flow. An example of comparison between systems with batteries and without batteries is also given in this paper. Finally the commercialization, marketing and subsidy policies of PV water pumping system in China are discussed. (orig.)
Chaos synchronization and parameter identification of three time scales brushless DC motor system
Energy Technology Data Exchange (ETDEWEB)
Ge, Z.-M. [Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan (China)]. E-mail: zmg@cc.nctu.edu.tw; Cheng, J.-W. [Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan (China)
2005-04-01
Chaotic anticontrol and chaos synchronization of brushless DC motor system are studied in this paper. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. Then, chaos synchronization of two identical systems via additional inputs and Lyapunov stability theory are studied. And further, the parameter of the system is traced via adaptive control and random optimization method.
Multi-input Fuzzy Logic Controller for Brushless dc Motor Drives
Y. H. Bharathi; B. R. Rekha; P. Bhaskar Bhaskar; C. S. Parvathi; Kulkarni, A.B.
2008-01-01
The brushless dc motors are used in various applications such as defence, industries,robotics, etc. In these applications, the motor should be precisely controlled to give the desiredperformance. The proposed controller systems consist of multi-input fuzzy (two-and three-input)logic controller (FLC) and multi-input integrated fuzzy logic controller (IFLC) for the speed controlof brushless dc servomotor drive. The input for the controllers are error e(k), change in error[first derivative of er...
Simulation Study on Brushless DC Motor Based on Fuzzy-PI Control
Jinli Lei
2011-01-01
Brushless DC motor ( BLDCM ) is a variable, strong coupling, nonlinear system, the simulation model is hard to be established. To solve this problem, based on the principle and structure of the brushless DC motor (BLDCM), and analyzing the mathematic mode, a simulation model of BLDCM control system is established in Matlab/Simulink by the modular design, and the fuzzy PI control algorithm of prototype is designed. The simulation results show that the fuzzy-PI control speeds up response time, ...
Chaos synchronization and parameter identification of three time scales brushless DC motor system
International Nuclear Information System (INIS)
Chaotic anticontrol and chaos synchronization of brushless DC motor system are studied in this paper. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. Then, chaos synchronization of two identical systems via additional inputs and Lyapunov stability theory are studied. And further, the parameter of the system is traced via adaptive control and random optimization method
Controlling a Brushless DC Motor in a Shift-by-Wire System
Wiberg, Johan
2003-01-01
Shift-by-Wire is about replacing the mechanical link between the automatic transmission and the shift lever with an electromechanical system. This will make new safety functions possible and assist the driver in other ways. To do this, an actuator with a brushless DC motor is built into the transmission. It controls the position of the shift valve, which decides the driving position. This thesis concerns the controlling of the brushless DC motor. This is done by programming a shift control ...
B. Tamilselvi; S. Mumtaj
2013-01-01
Brushless DC Motor have used in various sectors like aerospace, manufacturing and home machines owing to its trouble-free construction. The exact information of the rotor position is necessary for better performance of brushless DC motors the need for the rotor angle information in BLDC has been fulfilled by make use of some form of rotor position sensor. In BLDC drives the position sensor contains drawbacks of high cost, electrical connections, mechanical position problems and disadvantage o...
Speed Control Analysis of Brushless DC Motor Based on Maximum Amplitude DC Current Feedback
Hassan M.A.A.; Abdullah A.R.; Bahari N.
2014-01-01
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 con...
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...
Dynamic modeling of brushless dc motors for aerospace actuation
Demerdash, N. A.; Nehl, T. W.
1980-01-01
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.
Modeling and Analysis of PI Controller Based Speed Control of Brushless DC Motor Drive.
Directory of Open Access Journals (Sweden)
Mr.P.Nagasekhar Reddy
2013-09-01
Full Text Available The Brushless DC motors (BLDC find widespread applications in domestic and industries due to their low and high power density and ease of speed control. To accomplish desired level of performance the motor requires suitable speed controllers. In case of permanent magnet Brushless DC motors, usually control of speed is reached by using proportional integral (PI controller. Although the conventional PI controllers are widely used in the industry due to their simple control structure and ease of implementation, these controllers pose difficulties where there are some control complexity such as nonlinearity, load disturbances and parametric variations. Moreover PI controllers require precise linear mathematical models. In this paper, the analysis and mathematical modeling of BLDC motor is implemented. Also, speed control of three phase BLDC motor drive using power electronic device is projected by using matlab/Simulink. The simulation result shows the improved performance of developed Brushless DC motor drive.
Modelling and Simulation Analysis of the Brushless DC Motor by using MATLAB
Prasad, G.; N.Sree Ramya,; P.V.N. Prasad; G.Tulasi Ram Das,
2012-01-01
The paper presents a model of three phase star connected brushless dc motor considering the behaviour of motor during commutation. This process is done in MATLAB/ SIMULINK after development of the BLDC motor with sinusoidal and trapezoidal waveforms of back-EMF. A comparision study is presented between the MATLAB/ SIMULINK models of sinusoidal and trapezoidal models of back-EMF.
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...
A novel method for simulation of brushless DC motor servo-control system based on MATLAB
Tao, Keyan; Yan, Yingmin
2006-11-01
This paper provides a research about the simulation of brush-less DC motor (BLDCM) servo control system. Based on the mathematical model of Brush-less DC motor (BLDCM), built the system simulation model with the MATLAB software. When the system model is made, the isolated functional blocks, such as BLDCM block, the rotor's position detection block, change-phase logic block etc. have been modeled. By the organic combination of these blocks, the model of BLDCM can be established easily. The reasonability and validity have been testified by the simulation results and this novel method offers a new thought way for designing and debugging actual motors.
Estimation parameters and black box model of a brushless DC motor
José A. Becerra-Vargas; Francisco E. Moreno-García; Juan J. Quiroz-Omaña; Deyanira Bautista-Arias
2014-01-01
The modeling of a process or a plant is vital for the design of its control system, since it allows predicting its dynamic and behavior under different circumstances, inputs, disturbances and noise. The main objective of this work is to identify which model is best for a permanent magnet brushless DC specific motor. For this, the mathematical model of a DC motor brushless PW16D, manufactured by Golden Motor, is presented and compared with its black box model; both are derived from experimenta...
Chaos anticontrol and synchronization of three time scales brushless DC motor system
Energy Technology Data Exchange (ETDEWEB)
Ge Zhengming E-mail: zmg@cc.nctu.edu.tw; Cheng Juiwen; Chen Yensheng
2004-12-01
Chaos anticontrol of three time scale brushless dc motors and chaos synchronization of different order systems are studied. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. By adding constant term, periodic square wave, the periodic triangle wave, the periodic sawtooth wave, and kx vertical bar x vertical bar term, to achieve anticontrol of chaotic or periodic systems, it is found that more chaotic phenomena of the system can be observed. Then, by coupled terms and linearization of error dynamics, we obtain the partial synchronization of two different order systems, i.e. brushless DC motor system and rate gyroscope system.
Chaos anticontrol and synchronization of three time scales brushless DC motor system
International Nuclear Information System (INIS)
Chaos anticontrol of three time scale brushless dc motors and chaos synchronization of different order systems are studied. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. By adding constant term, periodic square wave, the periodic triangle wave, the periodic sawtooth wave, and kx vertical bar x vertical bar term, to achieve anticontrol of chaotic or periodic systems, it is found that more chaotic phenomena of the system can be observed. Then, by coupled terms and linearization of error dynamics, we obtain the partial synchronization of two different order systems, i.e. brushless DC motor system and rate gyroscope system
Approaches to Suppressing Shaft Voltage in Brushless DC Motor Driven by PWM Inverter
Iimori, Kenichi; Shinohara, Katsuji; Yamamoto, Kichiro; Morigami, Atsushi
This paper describes the approaches to suppressing the shaft voltage and bearing current by electrostatic shielding the stator end windings of the brushless DC motor driven by PWM inverter. At first, measured shaft voltage and bearing current are compared with those calculated waveforms to verify the common mode equivalent circuit of the brushless DC motor. Next, relationship between shaft voltage and stator winding to rotor capacitance is calculated using the common mode equivalent circuit. Finally, the electrostatic shielding of the stator end windings is evaluated to reduce the shaft voltage by experiments and calculations.
Simulation Study on Brushless DC Motor Based on Fuzzy-PI Control
Directory of Open Access Journals (Sweden)
Jinli Lei
2011-12-01
Full Text Available Brushless DC motor ( BLDCM is a variable, strong coupling, nonlinear system, the simulation model is hard to be established. To solve this problem, based on the principle and structure of the brushless DC motor (BLDCM, and analyzing the mathematic mode, a simulation model of BLDCM control system is established in Matlab/Simulink by the modular design, and the fuzzy PI control algorithm of prototype is designed. The simulation results show that the fuzzy-PI control speeds up response time, reduces the overshoot, and has strong robust, so it can make the system has better control performance and good applying value.
System and Method for Determining Rate of Rotation Using Brushless DC Motor
Howard, David E. (Inventor); Smith, Dennis A. (Inventor)
2000-01-01
A system and method are provided for measuring rate of rotation. A brushless DC motor is rotated and produces a back electromagnetic force (emf) on each winding thereof. Each winding's back-emf is squared. The squared outputs associated with each winding are combined, with the square root being taken of such combination, to produce a DC output proportional only to the rate of rotation of the motor's shaft.
Rate of rotation measurement using back-EMFS associated with windings of a brushless DC motor
Howard, David E. (Inventor)
2000-01-01
A system and method are provided for measuring rate of rotation. A brushless DC motor is rotated and produces a back electromagnetic force (emf) on each winding thereof. Each winding's back-emf is integrated and multiplied by the back-emf associated with an adjacent winding. The multiplied outputs associated with each winding are combined to produce a directionally sensitive DC output proportional only to the rate of rotation of the motor's shaft.
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.
Anti-control of chaos of single time-scale brushless DC motor.
Ge, Zheng-Ming; Chang, Ching-Ming; Chen, Yen-Sheng
2006-09-15
Anti-control of chaos of single time-scale brushless DC motors is studied in this paper. In order to analyse a variety of periodic and chaotic phenomena, we employ several numerical techniques such as phase portraits, bifurcation diagrams and Lyapunov exponents. Anti-control of chaos can be achieved by adding an external constant term or an external periodic term. PMID:16893797
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...
Roni Permana Saputra; Rizqi Andry Ardiansyah; Midriem Mirdanies; Arif Santoso; Aditya Sukma Nugraha; Anwar Muqorobin; Hendri Maja Saputra; Vita Susanti; Estiko Rijanto
2012-01-01
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 cont...
Improved Analytical Model of a Permanent-Magnet Brushless DC Motor
P. Kumar; 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 force, and iron losses in the motor. The advantage of analytical models is that they can be readily used for optimization of BLDC motor because they are fast.
Technology of Performance Improvement Brushless DC Motors and Inverter for Air conditioning
Baba, Kazuhiko; Matsuoka, Atsushi; Shinomoto, Yosuke; Arisawa, Koichi
High efficiency motors are demanded because of the viewpoint of environmental preservation. It is necessary to develop the technology of the energy conservation that can be achieved at low cost so that we may expand high efficiency motors onto the world. In this paper, the current status of the brushless DC motors and invertors to satisfy high efficiency, small size, high power and low cost is reviewed.
Control System of Sensorless Brushless DC Motor Based on TMS320F240
Li Zeng; Zicheng Li
2011-01-01
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 de...
Rapid virtual prototyping of electric vehicles using DQ behavioral model of a brushless DC motor
Cooper, Ian; Wilson, Peter R.; Brown, Andrew D.
2013-01-01
This paper presents a system level for the effective and rapid design and evaluation of a complete electric vehicle system. Several critical components are examined including the mechanical model of the vehicle, the electric motor (with its associated power electronic components) and the energy storage system.A Brushless DC (BLDC) motor Saber model that integrates the DQ axis transformations within the electro-mechanical motor model is developed that facilitates fast and accurate characteriza...
Electromagnetic Flux Analysis of Permanent Magnet Brushless DC Motor Using Magnet Software
G.R.Puttalakshmi; S Paramasivam
2013-01-01
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 an...
Development of a highly efficient brushless dc motor utilizing both radial and axial air gaps
Kang, K. J.; Jang, G. H.; Sung, S. J.; Chang, J. H.
2012-04-01
This research proposes an effective structure for a brushless dc motor utilizing both radial and axial air gaps. The proposed motor generates torque in both the radial and axial air gaps, while the conventional motor generates torque only in the radial air gap. The proposed motor was optimized to minimize the electromagnetic loss of the motor to increase the effective air gap length and fill-factor of the coil while decreasing the saturation of the core at the same time. The electromagnetic loss was reduced by 35% in comparison with a conventional motor.
Computation of magnetic field in DC brushless linear motors built with NdFeB magnets
International Nuclear Information System (INIS)
A software package based on finite element technique has been used to compute three-dimensional magnetic fields and static forces developed in brushless d.c. linear motors. As the field flux-source two different types of permanent magnets, one of them being the high energy neodymium- iron-boron type, has been used in computer models. Motors with the same specifications as the computer models were built and experimental results obtained from them are compared with the computed results
Uma Devi Kumaravelu; Sanavullah Mohamed Yakub
2012-01-01
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.
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.
Simulation Of Speed Control Of Brushless Dc Motor, With Fuzzy Logic Controller
C.Sheeba Joice; P.Nivedhitha
2014-01-01
Abstract— The electronically commuted Brushless DC motors are widely used in many industrial applications which increase the need for design of efficient control strategy for these noiseless motors. This paper deals with the efficient speed control mechanisms for these drives using meaningful fuzzy sets and rules. The fuzzy logic controller is developed using a MATLAB/ Simulink tool. The paper deals with the possibility of designing a control strategy, to achieve accurate speed control with t...
POSITION CONTROL OF BRUSHLESS DC MOTOR BASED ON DIGITAL SIGNAL PROCESSING
GENÇER, Çetin; İsmail COŞKUN
2006-01-01
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 ...
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.
Multilevel DC Link Inverter for Brushless Permanent Magnet Motors with Very Low Inductance
International Nuclear Information System (INIS)
Due to their long effective air gaps, permanent magnet motors tend to have low inductance. The use of ironless stator structure in present high power PM motors (several tens of kWs) reduces the inductance even further ( and lt; 100(micro)H). This low inductance imposes stringent current regulation demands for the inverter to obtain acceptable current ripple. An analysis of the current ripple for these low inductance brushless PM motors shows that a standard inverter with the most commonly used IGBT switching devices cannot meet the current regulation demands and will produce unacceptable current ripples due to the IGBT's limited switching frequency. This paper introduces a new multilevel dc link inverter, which can dramatically reduce the current ripple for brushless PM motor drives. The operating principle and design guidelines are included
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.
A Study on Reduction of Torque Ripple due to Commutation in Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Lee, Kwang Woon; Hong, Hee Jung; Park, Jung Bae; Yeo, Hyeong Gee; Yoo, Ji Yoon [Korea University, Seoul (Korea)
1998-11-01
Phase commutation in brusless DC motor brings about an instantaneous change in the average voltage of conducting phase so that phase current undulates, and this undulating current generates torque ripple. This paper presents a new current control method to reduce the torque ripple due to phase commutation, when the unipolar PWM method is applied for the phase current control of brushless DC motor. In this paper, we analyze average voltage variations of conducting phase in commutation period with PWM pattern and design current controller to compensate average voltage variations. In addition, we prove the validity of proposed method by experimental results. (author). 7 refs., 13 figs., 1 tab.
Estimation parameters and black box model of a brushless DC motor
Directory of Open Access Journals (Sweden)
José A. Becerra-Vargas
2014-08-01
Full Text Available The modeling of a process or a plant is vital for the design of its control system, since it allows predicting its dynamic and behavior under different circumstances, inputs, disturbances and noise. The main objective of this work is to identify which model is best for a permanent magnet brushless DC specific motor. For this, the mathematical model of a DC motor brushless PW16D, manufactured by Golden Motor, is presented and compared with its black box model; both are derived from experimental data. These data, the average applied voltage and the angular velocity, are acquired by a data acquisition card and imported to the computer. The constants of the mathematical model are estimated by a curve fitting algorithm based on non-linear least squares and pattern search using computational tool. To estimate the mathematical model constants by non-linear least square and search pattern, a goodness of fit of 84.88% and 80.48% respectively was obtained. The goodness of fit obtained by the black box model was 87.72%. The mathematical model presented slightly lower goodness of fit, but allowed to analyze the behavior of variables of interest such as the power consumption and the torque applied to the motor. Because of this, it is concluded that the mathematical model obtained by experimental data of the brushless motor PW16D, is better than its black box model.
On Stability of Open-Loop Operation without Rotor Information for Brushless DC Motors
Zhong Wu; Haotun Lyu; Yongli Shi; Di Shi
2014-01-01
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...
Chaos control of single time-scale brushless DC motor with sliding mode control method
Uyaroğlu, Yılmaz; CEVHER, Barış
2013-01-01
In this paper, the sliding mode control (SMC) scheme of single time-scale brushless DC motor (BLDCM) is investigated. The SMC method consists of 2 sections. To simplify the directive of the stability of the controlled single time-scale BLDCM in the sliding mode, first a special type of PI switching surface is adopted. Second, the SMC controller is obtained to guarantee the occurrence of the PI switching surface. The effectiveness of the theoretical analysis is evaluated by numerical...
Optimal Control for Single-Phase Brushless DC Motor with Hall Sensor
Dawei Meng; Xifeng Wang; Yongming Xu; Yufeng Lu
2013-01-01
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...
Chaos synchronization and parameters identification of single time scale brushless DC motors
International Nuclear Information System (INIS)
Chaos synchronization and parameters identification of single time scale brushless dc motors are studied in this paper. In order to analyze a variety of periodic and chaotic phenomena, we employ several numerical techniques such as phase portrait, bifurcation diagram, and Lyapunov exponents. By the adaptive control, the improved backstepping design method, the Gerschgorin theorem, and by addition of a monitor, chaos synchronization of two identical BLDCM systems are presented. Then, by the adaptive control, and the random optimization method, parameters identification is approached
Simulation Research on Control System of Brushless DC Motor Based on Fuzzy-PID
Fanneng Zhou; Changjun Qiu; Yulin Wang; Pinghu Chen
2012-01-01
To improve the overall performance of brushless DC motor (BLDCM), fuzzy-PID controller and its application in BLDCM control system are presented. Through the analysis of the mathematical models of BLDCM and combination of fuzzy control strategy and traditional PID control strategy, the modeling and simulation are done by the fuzzy control toolbox of MATLAB. The simulation results show that the fuzzy PID control speeds up response time, reduces the overshoot, and has strong robust and adaptive...
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
2014-01-01
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...
An adaptive tracking controller for a brushless DC motor with reduced overparameterization effects
Energy Technology Data Exchange (ETDEWEB)
Hu, J.; Dawson, D.M.; Burg, T.; Vedagarbha, P. [Clemson Univ., SC (United States)
1994-12-31
Using the integrator backstepping approach, we develop a full state feedback, adaptive position tracking controller for a brushless DC (BLDC) motor turning a robotic load. The proposed controller ensures global asymptotic tracking for the rotor position and velocity despite the parametric uncertainties throughout the entire electromechanical system. The overparameterization problem commonly associated with backstepping-type controllers is greatly reduced. Experimental results are used to validate the performance of the controller.
Multi-input Fuzzy Logic Controller for Brushless dc Motor Drives
Directory of Open Access Journals (Sweden)
Y. H. Bharathi
2008-01-01
Full Text Available The brushless dc motors are used in various applications such as defence, industries,robotics, etc. In these applications, the motor should be precisely controlled to give the desiredperformance. The proposed controller systems consist of multi-input fuzzy (two-and three-inputlogic controller (FLC and multi-input integrated fuzzy logic controller (IFLC for the speed controlof brushless dc servomotor drive. The input for the controllers are error e(k, change in error[first derivative of error ce(k] and change of change in error [second derivative of error cce(k]with a single-output. The error cce(k is substantial at the overshoots/undershoots and is thereforeessential for accurate speed control of brushless dc motor. The error cce(k has been introducedfor the first time in the literature as one of the input in the FLC and IFLC design. The IFLC isdesigned using FLC and proportional derivation integral (PID controllers. The controller systemshave been studied systematically for the transient and steady-state conditions. The three-inputIFLC is found to be superior, more robust, faster, flexible, and is insensitive to the parametervariations as compared with the FLC (with two-and three-input and conventional two-inputIFLC
On-Line Tracking Controller for Brushless DC Motor Drives Using Artificial Neural Networks
Rubaai, Ahmed
1996-01-01
A real-time control architecture is developed for time-varying nonlinear brushless dc motors operating in a high performance drives environment. The developed control architecture possesses the capabilities of simultaneous on-line identification and control. The dynamics of the motor are modeled on-line and controlled using an artificial neural network, as the system runs. The control architecture combines the experience and dependability of adaptive tracking systems with potential and promise of the neural computing technology. The sensitivity of real-time controller to parametric changes that occur during training is investigated. Such changes are usually manifested by rapid changes in the load of the brushless motor drives. This sudden change in the external load is simulated for the sigmoidal and sinusoidal reference tracks. The ability of the neuro-controller to maintain reasonable tracking accuracy in the presence of external noise is also verified for a number of desired reference trajectories.
The Digital PI Control for Driving Constant Speed of Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Yoon, Shin Yong; Kim, Yong; Baek, Soo Hyun [Dongguk University (Korea); Kim, Hyun Soo [Chang Hung Telecom Co., Ltd. (Korea); Kim, Il Nam [Dongseoul College (Korea)
2000-06-01
This paper presents the improvement for speed characteristics of a Brushless DC Motor (BLDCM), it was applied to digital PI control for this. The practical PID control has been widely used to velocity control of DC motor. In this paper, a digital PI controller is used in order to decrease to speed error in constant velocity control of BLDCM. A TMS320C31 DSP is used for the microprocessor of digital PI control. The method using the DSP carry out the real-time control. The DSP has the rapid calculation ability and sampling time used 1ms. Driving BLDCM used 50W, motor input DC 150V and rotation speed 3000rpm. When BLDCM is to approval for discretion velocity at the acceleration and deceleration driving with any load, it was a feasible for stabilization control. Therefore, the experimental results indicate the superiority and validity of the velocity control by digital PI control. (author). 7 refs., 15 figs., 2 tabs.
Numerical analysis of the electromechanically coupled magnetic field in brushless DC motors
International Nuclear Information System (INIS)
This paper presents a numerical method to solve the electromechanically coupled equations in a brushless DC (BLDC) motor, i.e. Maxwell equation, voltage equation and Newton's equations by introducing the nonlinear finite element analysis and the time stepping method. It also investigates the coupling effect of the eccentric motion of a rotor on the characteristics of the magnetic force and the resulting motion of a BLDC motor by analyzing the free response and Fourier transform of the excitation force and the resulting displacement
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
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 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 by...
POSITION CONTROL OF BRUSHLESS DC MOTOR BASED ON DIGITAL SIGNAL PROCESSING
Directory of Open Access Journals (Sweden)
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.
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...
Fuzzy Auto-adjust PID Controller Design of Brushless DC Motor
Yuanxi, Wang; Yali, Yu; Guosheng, Zhang; Xiaoliang, Sheng
Using conventional PID control method, to guarantee the rapidity and small overshoot dynamic and static performance of the BLDCM (brushless DC motor) system is out of the question. The control method to combine fuzzy control with PID control was fit the multivariable strong coupling nonlinear characteristic of BLDCM system. Matlab/Simulink simulation model had been built. The result of computer simulation shows that, compared with the conventional PID controller, the dynamic and static performance of fuzzy auto-adjust PID controller are put forward to optimize. The research work of this paper has profound significance for high precision controller design.
Shaft Voltage and Life of Bearing electric-erosion for the Brushless DC Motor
Maetani, Tatsuo; Isomura, Yoshinori; Komiyama, Hiroshi; Morimoto, Shigeo
This paper describes the life of noise of bearing electro-erosion in the shaft voltage of brushless DC motors. We confirmed that shaft voltage is suppressed to equal to or less than the dielectric breakdown voltage of bearing lubricant in the insulated rotor proposed for suppression of shaft voltage. However, since bearing electro-erosion appears over time along with the deterioration of noise performance, the threshold of the shaft voltage to secure noise performance over long periods of time is necessary. Therefore, the threshold of the shaft voltage that influences the life of noise was obtained in acceleration tests.
Speed Digital Control of Brushless DC Motor Using dsPIC Controller
Gheorghe Băluţă; Gheorghe Ursanu
2014-01-01
This paper presents the digital control of the Brushless DC motor (BLDCM) speed. The dsPICDEM MC1 development system (with the dsPIC30F6010A microcontroller) and the dsPICDEM MC1L power module, manufactured by Microchip Company, were used. The control program was developed in C programming language. The graphical user interface was realized in LabVIEW 8.6 graphical programming language. For speed control, a digital controller PI type was implemented. Due to digital contro...
Four quadrant control circuit for a brushless three-phase dc motor
Nola, Frank J. (Inventor)
1987-01-01
A control circuit is provided for a brushless three-phase dc motor which affords four quadrant control from a single command. The control circuit probes acceleration of the motor in both clockwise and counterclockwise directions and braking and generation in both clockwise and counterclockwise directions. In addition to turning on individual transistors of the transistor pairs connected to the phase windings of the motor for 120 deg periods while the other transistor of that pair is off, the control circuit also provides, in a future mode of operation, turning the two transistors of each pair on and off alternately at a phase modulation frequency during such a 120 deg period. A feedback signal is derived which is proportional to the motor current and which has a polarity consistent with the command signal, such that negative feedback results.
The Parameter Estimation and Stability Improvement of the Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Kim, Cherl Jin [Halla University (Korea, Republic of); Im, Tae Bin [Korea Electronics Technology Institute (Korea, Republic of)
1999-03-01
Generally, the digital controller has many advantages such as high precision, robustness to electrical noise, capability of flexible programming and fast response to the load variation. In this study, we have established proper mathematical equivalent model of brushless DC (BLDC) motor and estimated the motor parameter by means of the back-emf measurement as being the step input to the controlled target BLDC motor. And the validity of proposed estimation method is confirmed by the test result of step response. As well, we have designed the reasonable digital controller as a consequence of the root locus method which is obtained from the open-loop transfer function of BLDC motor with hall sensor, and the determination of control gain for variable speed control. Here, revised Ziegler-Nichols tuning method is applied for the proper digital gain establishment, and the system stability is verified by the frequency domain analysis with Bode-plot and experimentation. (author). 8 refs., 18 figs., 1 tab.
A novel configuration for a brushless DC motor with an integrated planetary gear train
Yan, Hong-Sen; Wu, Yi-Chang
2006-06-01
This paper presents a novel configuration of a brushless DC (BLDC) motor with an integrated planetary gear train, which provides further functional and structural integrations to overcome inherent drawbacks of traditional designs. The effects of gear teeth on the magnetic field and performance of the BLDC motor are investigated. Two standard gear profile systems integrated on the stator with feasible numbers of gear teeth are introduced to reduce the cogging torque. An equivalent magnetic circuit model and an air-gap permeance model are applied to analytically analyze the magnetic field, while the validity is verified by 2-D finite-element method (FEM). Furthermore, the motor performance is discussed and compared with an existing design. The results show that the present design has the characteristics of lower cogging torque and torque ripple than the conventional design, which is of benefit to the widely applications on accurate motion and position control for BLDC motors.
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.
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。
A New Optimal Current Excitation Scheme of Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Park, S.J. [Koje College, Koje (Korea); Park, H.W. [Korea Naval Academy, Jinhae (Korea)
1999-10-01
In this paper, the novel optimal excitation scheme of BLDCM producing loss-minimized ripple-free torque based on the d-q-0 reference frame is presented including 3-phase unbalanced condition. The optimized phase current waveforms that are obtained by the proposed method can be reference values and the motor winding currents are forced to track it by using the delta modulation technique. As a result, it can be shown that the proposed work provides a simple and clear way of obtaining and controlling optimal motor excitation current. Simulation and experimental results prove the validity and practical applications of the proposed control scheme. (author). 6 refs.,5 figs.
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.
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.
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.
Brushless DC motor control system responsive to control signals generated by a computer or the like
Packard, D. T. (Inventor)
1985-01-01
A control system for a brushless DC motor responsive to digital control signals is disclosed. The motor includes a multiphase wound stator and a permanent magnet rotor. The motor is arranged so that each phase winding, when energized from a DC source, will drive the rotor through a predetermined angular position or step. A commutation signal generator responsive to the shaft position provides a commutation signal for each winding. A programmable control signal generator such as a computer or microprocessor produces individual digital control signals for each phase winding. The control signals and commutation signals associated with each winding are applied to an AND gate for that phase winding. Each gate controls a switch connected in series with the associated phase winding and the DC source so that each phase winding is energized only when the commutation signal and the control signal associated with that phase winding are present. The motor shaft may be advanced one step at a time to a desired position by applying a predetermined number of control signals in the proper sequence to the AND gates and the torque generated by the motor be regulated by applying a separate control signal and each AND gate which is pulse width modulated to control the total time that each switch connects its associated winding to the DC source during each commutation period.
Cheaper Synthesis Of Multipole-Brushless-dc-Motor Current
Alhorn, Dean C.; Howard, David E.
1994-01-01
Circuit converts output of single two-phase shaft-angle resolver to that of multi-speed three-phase shaft-angle resolver. Converter circuit applicable to generation of multispeed, multiphase shaft-angle-resolver signals from single two-phase shaft-angle resolver. Combination of converter circuit and single two-phase shaft-angle resolver offer advantages in cost, weight, size, and complexity. Design readily adaptable to two-phase motor.
Saxena, Anand
The focus of this research was to demonstrate a four blade rotor trim in forward flight using integrated trailing edge flaps instead of using a swashplate controls. A compact brushless DC motor was evaluated as an on-blade actuator, with the possibility of achieving large trailing edge flap amplitudes. A control strategy to actuate the trailing edge flap at desired frequency and amplitude was developed and large trailing edge flap amplitudes from the motor (instead of rotational motion) were obtained. Once the actuator was tested on the bench-top, a lightweight mechanism was designed to incorporate the motor in the blade and actuate the trailing edge flaps. A six feet diameter, four bladed composite rotor with motor-flap system integrated into the NACA 0012 airfoil section was fabricated. Systematic testing was carried out for a range of load conditions, first in the vacuum chamber followed by hover tests. Large trailing edge flap deflections were observed during the hover testing, and a peak to peak trailing edge flap amplitude of 18 degree was achieved at 2000 rotor RPM with hover tip Mach number of 0.628. A closed loop controller was designed to demonstrate trailing edge flap mean position and the peak to peak amplitude control. Further, a soft pitch link was designed and fabricated, to replace the stiff pitch link and thereby reduce the torsional stiffness of the blade to 2/rev. This soft pitch link allowed for blade root pitch motion in response to the trailing edge flap inputs. Blade pitch response due to both steady as well as sinusoidal flap deflections were demonstrated. Finally, tests were performed in Glenn L. Martin wind tunnel using a model rotor rig to assess the performance of motor-flap system in forward flight. A swashplateless trim using brushless DC motor actuated trailing edge flaps was achieved for a rotor operating at 1200 RPM and an advance ratio of 0.28. Also, preliminary exploration was carried out to test the scalability of the motor
Development of a photo-voltaic pumping system using a brushless D.C. motor and helical rotor pump
Energy Technology Data Exchange (ETDEWEB)
Langridge, D.; Lawrance, W.; Wichert, B. [Curtin Univ. of Technology, Bentley (Australia)
1996-12-31
A PV pumping system based on a brushless d.c. motor and helical rotor pump has been designed, simulated and a prototype constructed. The paper describes the operation of the system and the development of component models for the array, the brushless d.c. motor and helical rotor pump. Simulation results and subsequent test results for the complete system are included. Efficiencies of between 30 and 50% for the system (excluding the array) have been achieved over a range of loads and operating conditions for 4 x 1 and 4 x 2 array configurations. 9 refs., 10 figs., 2 tabs.
Programmable logic device based brushless DC motor control
Van den Bossche, Alex; Bozalakov, Dimitar; Vyncke, Thomas; Valchev, Vencislav
2011-01-01
In this article a three-phase BLDC motor controller for use in an Ultra-Light Electrical Vehicle is presented. The control is performed using a Programmable Logic Device (CPLD), which doesn’t require any additional processor. In this way a robust and low-complexity control is obtained. For extending the speed range of the BLDC, a phase advance circuit is implemented as well. The power consumption of the controller is very low which is an interesting feature in battery applications.
Magnetic Circuit & Torque Analysis Of Brushless DC Motor
Arif J. Abbas; Mohamed Rashid; Kais Wadi
2013-01-01
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,...
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.
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
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
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...
Adaptive control of rigid-link electrically-driven robots actuated with brushless DC motors
International Nuclear Information System (INIS)
In this paper, we extend the work of [1] and [2] to design an adaptive controller for rigid-link electrically-driven (RLED) robot manipulators specifically actuated with Brushless Direct Current (BLDC) motors. In particular the adaptive controller presented is tailored to handle the multi-link dynamics of a rigid-link robot as opposed to a simple inertial load. Furthermore, the linear electrical dynamics of brushed DC motors used in the development of [1], are replaced with the multiple input nonlinear dynamics of BLDC motors. The result is an adaptive controller that guarantees globally asymptotic convergence of the link position tracking error in spite of parametric uncertainty throughout the entire electro-mechanical model
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.
Adaptive control of rigid-link electrically-driven robots actuated with brushless DC motors
Energy Technology Data Exchange (ETDEWEB)
Bridges, M.M. [Univ. of Michigan, Ann Arbor, MI (United States); Dawson, D.M. [Clemson Univ., SC (United States)
1994-12-31
In this paper, we extend the work of [1] and [2] to design an adaptive controller for rigid-link electrically-driven (RLED) robot manipulators specifically actuated with Brushless Direct Current (BLDC) motors. In particular the adaptive controller presented is tailored to handle the multi-link dynamics of a rigid-link robot as opposed to a simple inertial load. Furthermore, the linear electrical dynamics of brushed DC motors used in the development of [1], are replaced with the multiple input nonlinear dynamics of BLDC motors. The result is an adaptive controller that guarantees globally asymptotic convergence of the link position tracking error in spite of parametric uncertainty throughout the entire electro-mechanical model.
Brushless DC motor control system responsive to control signals generated by a computer or the like
Packard, Douglas T. (Inventor); Schmitt, Donald E. (Inventor)
1987-01-01
A control system for a brushless DC motor responsive to digital control signals is disclosed. The motor includes a multiphase wound stator and a permanent magnet rotor. The rotor is arranged so that each phase winding, when energized from a DC source, will drive the rotor through a predetermined angular position or step. A commutation signal generator responsive to the shaft position provides a commutation signal for each winding. A programmable control signal generator such as a computer or microprocessor produces individual digital control signals for each phase winding. The control signals and commutation signals associated with each winding are applied to an AND gate for that phase winding. Each gate controls a switch connected in series with the associated phase winding and the DC source so that each phase winding is energized only when the commutation signal and the control signal associated with that phase winding are present. The motor shaft may be advanced one step at a time to a desired position by applying a predetermined number of control signals in the proper sequence to the AND gates and the torque generated by the motor may be regulated by applying a separate control signal to each AND gate which is pulse width modulated to control the total time that each switch connects its associated winding to the DC source during each commutation period.
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.
Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
R. Saranya, S. Saravana kumar,R. Baskaran, A. Vinidha Roc, K. Sathiyasekar
2014-01-01
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 b...
Brushless direct-current motors
Bahm, E. J.
1970-01-01
Survey results are presented on the use of unconventional motor windings and switching sequences to optimize performance of brushless dc motors. A motor was built, each coil terminal having a separate, accessible lead. With the shaft and all electronics excluded, length and outside diameter measured 1.25 and 0.75 in., respectively.
Off-line tuning of a PI speed controller for a permanent magnet brushless DC motor using DSP
International Nuclear Information System (INIS)
In this paper, a new method of tuning Proportional Integral (PI) coefficients for a permanent magnet brushless DC (PMBLDC) motor drives is proposed. Artificial neural network is used to identify the whole system using maximum overshoot and settling time obtained from the application circuit for different Kp-Ki pairs. Optimal values of PI controller coefficients are obtained using genetic algorithm. Motion Control Kit (MCK243) is used to carry out digital motion control applications. The MCK243 kit includes a power module and a three-phase brushless motor. TMS320F243 programs are used for PMBLDC motor speed control. Experimental results are given to show the validity of this method.
Energy Technology Data Exchange (ETDEWEB)
Chigiri, T.; Shimada, T.; Watanabe, T.; Ichinokura, O.; Jinzenji, T. [Tohoku University, Sendai (Japan)
1996-11-20
Since the rare metal magnets show the high saturation flux density, the ferrite magnets of the magnetic field poles of PM (permanent magnet) motors have been substituted for them in recent years. The feature of the rare metal magnet realize small size or high power BLM (brushless dc motors). However, the ordinary magnetic field poles of the PM motors generate higher harmonic flux and cause torque ripple. They are usually removed by short pitch winding, skew slot method and so on. But these methods show a drawback to lower efficiency. This problem is important especially for high power BLM. Recently new methods have been proposed to realize zero torque ripple and high efficiency drive at the same time. The methods optimize the reference current waveform which is calculated by motor ENE (electromotive force) in advance, and current are controlled to follow up the optimized one. However, the one method assumes try and error. The other one doesn`t prove that it realizes maximum efficiency and zero torque ripple drive at the same time. And they have much room to improvement to apply to BLM. This paper proposes the simultaneous equations which give the accurate relation among instantaneous torque, EW and current, and proposes a new index CSR which evaluates the relation between copper loss and current waveform. Then the optimized current waveform to drive BLM with zero torque ripple and maximum efficiency is calculated by using new equations and CSR. For this waveform includes triplex harmonic order, normal three phase full bridge inverter can`t be used. This paper proposes four arm full bridge inverter which can apply triplex order current to BLM. Experimental result proves this method is available. 9 refs., 11 figs., 2 tabs.
Realization of Fuzzy Logic Controlled Brushless DC Motor Drives Using Matlab/Simulink
Çunkas, Mehmet; Aydoğdu, Omer
2010-01-01
In this paper, an efficient simulation model for fuzzy logic controlled brushless direct current motor drives using Matlab/Simulink is presented. The brushless direct current (BLDC) motor is efficiently controlled by Fuzzy logic controller (FLC). The control algorithms, fuzzy logic and PID are compared. Also, the dynamic characteristics of the BLDC motor (i.e. speed and torque) and as well as currents and voltages of the inverter components are easily observed and analyzed by using the develo...
Adaptive H∞ nonlinear velocity tracking using RBFNN for linear DC brushless motor
Tsai, Ching-Chih; Chan, Cheng-Kain; Li, Yi Yu
2012-01-01
This article presents an adaptive H ∞ nonlinear velocity control for a linear DC brushless motor. A simplified model of this motor with friction is briefly recalled. The friction dynamics is described by the Lu Gre model and the online tuning radial basis function neural network (RBFNN) is used to parameterise the nonlinear friction function and un-modelled errors. An adaptive nonlinear H ∞ control method is then proposed to achieve velocity tracking, by assuming that the upper bounds of the ripple force, the changeable load and the nonlinear friction can be learned by the RBFNN. The closed-loop system is proven to be uniformly bounded using the Lyapunov stability theory. The feasibility and the efficacy of the proposed control are exemplified by conducting two velocity tracking experiments.
Demerdash, N. A. O.
1976-01-01
The modes of operation of the brushless d.c. machine and its corresponding characteristics (current flow, torque-position, etc.) are presented. The foundations and basic principles on which the preliminary numerical model is based, are discussed.
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.
Influence of design parameters on the starting torque of a single-phase PM brushless DC motor
Bentouati, S.; Zhu, Z.Q.; Howe, D.
2000-01-01
The starting torque of a single-phase permanent magnet brushless DC motor is investigated, for both radial and parallel magnetization. Finite element analysis is used to assess the relative merits of alternative methods of introducing the required air gap asymmetry, viz. tapered air gap, stepped air gap, asymmetric air gap, and slotted teeth. The predicted results are validated experimentally
MERIN JOHN, VINU THOMAS
2013-01-01
The Permanent Magnet Brushless DC (BLDC) motor offers higher efficiency, low maintenance, reduced weight and compact construction. For many industrial applications, the BLDC motor is increasingly being used. This paper presents a new sensorless drive scheme for BLDC motor based on the back EMF difference. The commutation point of the drive is determined by detecting the Zero Crossing Point (ZCP) of difference in back EMF of two phases. Simulations of the proposed method have been carried out ...
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.
Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
Directory of Open Access Journals (Sweden)
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.
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.
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)
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.
Demerdash, N. A.; Nehl, T. W.
1979-01-01
A comprehensive digital model for the analysis of the dynamic-instantaneous performance of a power conditioner fed samarium-cobalt permanent magnet brushless DC motor is presented. The particular power conditioner-machine system at hand, for which this model was developed, is a component of an actual prototype electromechanical actuator built for NASA-JSC as a possible alternative to hydraulic actuators as part of feasibility studies for the shuttle orbiter applications. Excellent correlation between digital simulated and experimentally obtained performance data was achieved for this specific prototype. This is reported on in this paper. Details of one component of the model, its applications and the corresponding results are given in this paper.
Speed Digital Control of Brushless DC Motor Using dsPIC Controller
Directory of Open Access Journals (Sweden)
Gheorghe Băluţă
2014-09-01
Full Text Available This paper presents the digital control of the Brushless DC motor (BLDCM speed. The dsPICDEM MC1 development system (with the dsPIC30F6010A microcontroller and the dsPICDEM MC1L power module, manufactured by Microchip Company, were used. The control program was developed in C programming language. The graphical user interface was realized in LabVIEW 8.6 graphical programming language. For speed control, a digital controller PI type was implemented. Due to digital controller well chosen and well tuned, the system response at speed step variation is very good. Therewith, the experimental results obtained also show a good compensation of disturbance which does not happen in open-loop control.
Energy Technology Data Exchange (ETDEWEB)
Lawler, J.S.
2001-10-29
The brushless dc motor (BDCM) has high-power density and efficiency relative to other motor types. These properties make the BDCM well suited for applications in electric vehicles provided a method can be developed for driving the motor over the 4 to 6:1 constant power speed range (CPSR) required by such applications. The present state of the art for constant power operation of the BDCM is conventional phase advance (CPA) [1]. In this paper, we identify key limitations of CPA. It is shown that the CPA has effective control over the developed power but that the current magnitude is relatively insensitive to power output and is inversely proportional to motor inductance. If the motor inductance is low, then the rms current at rated power and high speed may be several times larger than the current rating. The inductance required to maintain rms current within rating is derived analytically and is found to be large relative to that of BDCM designs using high-strength rare earth magnets. Th us, the CPA requires a BDCM with a large equivalent inductance.
A novel position-sensorless control method for brushless DC motors
International Nuclear Information System (INIS)
This paper presents the design and implementation of a high performance position-sensorless control scheme for the extensively used brushless DC (BLDC) motors. In the proposed method, with proper PWM strategy, instead of detecting the zero-crossing point (ZCP) of the nonexcited motor back electromagnetic force (EMF) or the average motor terminal to neutral voltage, the true zero-crossing points of back EMF are extracted directly from the difference of the specific average line-to-line voltages with simple RC circuits and comparators. In contrast to conventional methods, the neutral voltage is not needed and the diode freewheeling currents in the nonconducted phase are eliminated completely; therefore, the commutation signals are more accurate and insensitive to the common-mode noise. Moreover, 100% pulse-width-modulation (PWM) duty ratio control of BLDC motors is provided with the presented method. As a result, the proposed method makes it possible to achieve good motor performance over a wide speed range and to simplify the starting procedure. The detailed circuit model is analyzed and some experimental results obtained from a sensorless prototype are shown to verify the analysis and confirm the validity of the proposed method.
International Nuclear Information System (INIS)
The brushless dc motor (BDCM) has high-power density and efficiency relative to other motor types. These properties make the BDCM well suited for applications in electric vehicles provided a method can be developed for driving the motor over the 4 to 6:1 constant power speed range (CPSR) required by such applications. The present state of the art for constant power operation of the BDCM is conventional phase advance (CPA)[1]. In this paper, we identify key limitations of CPA. It is shown that the CPA has effective control over the developed power but that the current magnitude is relatively insensitive to power output and is inversely proportional to motor inductance. If the motor inductance is low, then the rms current at rated power and high speed may be several times larger than the current rating. The inductance required to maintain rms current within rating is derived analytically and is found to be large relative to that of BDCM designs using high-strength rare earth magnets. Th us, the CPA requires a BDCM with a large equivalent inductance
Gwaltney, D. A.
2002-01-01
A FY 2001 Center Director's Discretionary Fund task to develop a test platform for the development, implementation. and evaluation of adaptive and other advanced control techniques for brushless DC (BLDC) motor-driven mechanisms is described. Important applications for BLDC motor-driven mechanisms are the translation of specimens in microgravity experiments and electromechanical actuation of nozzle and fuel valves in propulsion systems. Motor-driven aerocontrol surfaces are also being utilized in developmental X vehicles. The experimental test platform employs a linear translation stage that is mounted vertically and driven by a BLDC motor. Control approaches are implemented on a digital signal processor-based controller for real-time, closed-loop control of the stage carriage position. The goal of the effort is to explore the application of advanced control approaches that can enhance the performance of a motor-driven actuator over the performance obtained using linear control approaches with fixed gains. Adaptive controllers utilizing an exact model knowledge controller and a self-tuning controller are implemented and the control system performance is illustrated through the presentation of experimental results.
A novel position-sensorless control method for brushless DC motors
Energy Technology Data Exchange (ETDEWEB)
Zhang, X.Z., E-mail: Z_X_Z2000@163.co [School of Electrical and Information Engineering, Hunan University, Changsha (China) and School of Computer and Communication, Hunan Institute of Engineering, Xiangtan (China); Wang, Y.N. [School of Electrical and Information Engineering, Hunan University, Changsha (China)
2011-03-15
This paper presents the design and implementation of a high performance position-sensorless control scheme for the extensively used brushless DC (BLDC) motors. In the proposed method, with proper PWM strategy, instead of detecting the zero-crossing point (ZCP) of the nonexcited motor back electromagnetic force (EMF) or the average motor terminal to neutral voltage, the true zero-crossing points of back EMF are extracted directly from the difference of the specific average line-to-line voltages with simple RC circuits and comparators. In contrast to conventional methods, the neutral voltage is not needed and the diode freewheeling currents in the nonconducted phase are eliminated completely; therefore, the commutation signals are more accurate and insensitive to the common-mode noise. Moreover, 100% pulse-width-modulation (PWM) duty ratio control of BLDC motors is provided with the presented method. As a result, the proposed method makes it possible to achieve good motor performance over a wide speed range and to simplify the starting procedure. The detailed circuit model is analyzed and some experimental results obtained from a sensorless prototype are shown to verify the analysis and confirm the validity of the proposed method.
Control digital de un motor síncrono DC Brushless sin sensor de posición de motor
Vargas Martín, Elliot
2013-01-01
Aquest projecte consisteix en el disseny i fabricació d'un controlador digital per a un motor síncron DC Brushless (sense escombretes) que no te sensor de posició, centrant-se’n els motors de vehicles teledirigits d'alta potència que són molt similars als dels vehicles elèctrics però a menor escala. Aquests motors són trifàsics i com no tenen escombretes, la commutació de l'alimentació dels debanats s'aconsegueix amb la commutació elèctrica mitjançant una electrònica de potència controlada...
Directory of Open Access Journals (Sweden)
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.
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...
Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control
Energy Technology Data Exchange (ETDEWEB)
Lawler, J.S.
2000-06-23
The trapezoidal back electromotive force (emf) brushless direct current (dc) motor (BDCM) with surface-mounted magnets has high-power density and efficiency especially when rare-earth magnet materials are used. Traction applications, such as electric vehicles, could benefit significantly from the use of such motors. Unfortunately, a practical means for driving the motor over a constant power speed ratio (CPSR) of 5:1 or more has not yet been developed. A key feature of these motors is that they have low internal inductance. The phase advance method is effective in controlling the motor power over such a speed range, but the current at high speed may be several times greater than that required at the base speed. The increase in current during high-speed operation is due to the low motor inductance and the action of the bypass diodes of the inverter. The use of such a control would require increased current rating of the inverter semiconductors and additional cooling for the inverter, where the conduction losses increase proportionally with current, and especially for the motor, where the losses increase with the square of the current. The high current problems of phase advance can be mitigated by adding series inductance; however, this reduces power density, requires significant increase in supply voltage, and leaves the CPSR performance of the system highly sensitive to variations in the available voltage. A new inverter topology and control scheme has been developed that can drive low-inductance BDCMs over the CPSR that would be required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC). It is shown that the BDCM has an infinite CPSR when it is driven by the DMIC.
A continually online-trained neural network controller for brushless DC motor drives
Energy Technology Data Exchange (ETDEWEB)
Rubaai, A.; Kotaru, R.; Kankam, M.D.
2000-04-01
In this paper, a high-performance controller with simultaneous online identification and control is designed for brushless dc motor drives. The dynamics of the motor/load are modeled online, and controlled using two different neural network based identification and control schemes, as the system is in operation. In the first scheme, an attempt is made to control the rotor angular speed, utilizing a single three-hidden-layer network. The second scheme attempts to control the stator currents, using a predetermined control law as a function of the estimated states. This schemes incorporates three multilayered feedforward neural networks that are online trained, using the Levenburg-Marquadt training algorithm. The control of the direct and quadrature components of the stator current successfully tracked a wide variety of trajectories after relatively short online training periods. The control strategy adapts to the uncertainties of the motor/load dynamics and, in addition, learns their inherent nonlinearities. Simulation results illustrated that a neurocontroller used in conjunction with adaptive control schemes can result in a flexible control device which may be utilized in a wide range of environments.
The Analysis of Vibration Due to Magnetic Exciting Force in the Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Han, Ki Jin [LG Innotek (Korea); Cho, Han Sam; Jung, Hyun Kyo [Seoul National University, Seoul (Korea)
2001-01-01
In this paper, the general research on the analysis of the vibration due to magnetic exciting force in the small brushless DC(BLDC) motor, which is used in the Digital Versatile Disk(DVD) ROM driving system, is performed. The first part of the study is the analysis of the magnetic exciting force in the air gap region. As a verification of the exciting force by numerical analysis, the magnetic exciting force distribution in the airgap region is computed by using Reluctance Network Method(RNM). In addition, thr effect of the eccentricity on the magnetic exciting force is discussed. The other part of the research is the structural analysis if the rotor structure of thr BLDC motor. The natural mode analysis of thr rotor structure is performed, and the vibration response due to magnetic exciting force is found. As a result of the procedures, the basic estimation of the effect of the magnetic exciting force on the vibration of BLDC motor is suggested. (author). 14 refs., 10 figs., 1 tab.
Energy Technology Data Exchange (ETDEWEB)
Chen, Z.; Doki, S.; Okuma, S. [Nagoya University, Nagoya (Japan); Tomita, M. [Gifu National College of Technology, Gifu (Japan); Senju, t. [University of the Ryukyus, Okinawa (Japan)
1998-07-01
The equation of brushless dc motors is nonlinear, to which linear control theories are difficult to apply. In this paper, firstly, a disturbance observer to estimate rotor positions is proposed. By assuming the non-linear term of the e.m.f. as a kind of disturbance, the model of the brushless dc motors becomes a linear one so that the disturbance observer can be applied. Secondly, a velocity estimator using the e.m.f. estimated by the disturbance observer is proposed. The observer and estimator are 2nd-order, systems. Thus they are simple and easy for tuning. Their pole assignments and influences of parameter deviations are also discussed. The experimental results show that the proposed method is valid. 7 refs., 14 figs., 2 tabs.
Torque-Summing Brushless Motor
Vaidya, J. G.
1986-01-01
Torque channels function cooperatively but electrically independent for reliability. Brushless, electronically-commutated dc motor sums electromagnetic torques on four channels and applies them to single shaft. Motor operates with any combination of channels and continues if one or more of channels fail electrically. Motor employs single stator and rotor and mechanically simple; however, each of channels electrically isolated from other so that failure of one does not adversely affect others.
Energy Technology Data Exchange (ETDEWEB)
Saito, Y.; Tsunehiro, Y.; Yamamura, N. [Nagoya Inst. of Tech. (Japan)
1996-02-20
In respect of the construction of motor as the driving source of electric vehicle, there are two means as inverter-driving induction motors and DC brushless motors. Both of said means have the merits and demerits respectively as DC brushless motor has the excellent driving efficiency in low speed region and the advantage to deal with the trouble of inverter by the brake of power generation while the problems thereof are the filed-weakening control like induction motors is difficult in the practical use and a position sensor is necessary. In this paper, the electric vehicle are used as the object of the research for studying the construction and controlling method of brushless motor without position sensor, the control of the constant output in high speed region, and the starting as well as braking methods of the motor. Using current-source PWM inverter is the characteristic of this means. It is indicated by the comparative investigation with respect to the operating characteristics between the present means and the system using voltage-source inverter to the same synchronous machine that for the latter system the filter at the output side is indispensable and the values of the operating characteristics, efficiency, etc., in the brushless control are lower than those of the present means. 7 refs., 9 figs., 1 tab.
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。
SPEED CONTROL OF BRUSHLESS DC MOTOR ON RESONANT POLE INVERTER USING FUZZY LOGIC CONTROLLER
Directory of Open Access Journals (Sweden)
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.
Directory of Open Access Journals (Sweden)
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.
Optimal Control for Single-Phase Brushless DC Motor with Hall Sensor
Directory of Open Access Journals (Sweden)
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.
Directory of Open Access Journals (Sweden)
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.
Design and control of the phase current of a brushless dc motor to eliminate cogging torque
Jang, G. H.; Lee, C. J.
2006-04-01
This paper presents a design and control method of the phase current to reduce the torque ripple of a brushless dc (BLDC) motor by eliminating cogging torque. The cogging torque is the main source of torque ripple and consequently of speed error, and it is also the excitation source to generate the vibration and noise of a motor. This research proposes a modified current wave form, which is composed of main and auxiliary currents. The former is the conventional current to generate the commutating torque. The latter generates the torque with the same magnitude and opposite sign of the corresponding cogging torque at the given position in order to eliminate the cogging torque. Time-stepping finite element method simulation considering pulse-width-modulation switching method has been performed to verify the effectiveness of the proposed method, and it shows that this proposed method reduces torque ripple by 36%. A digital-signal-processor-based controller is also developed to implement the proposed method, and it shows that this proposed method reduces the speed ripple significantly.
International Nuclear Information System (INIS)
Anti-control of chaos of single time scale brushless dc motors (BLDCM) and chaos synchronization of different order systems are studied in this paper. By addition of an external nonlinear term, we can obtain anti-control of chaos. Then, by addition of the coupling terms, by the use of Lyapunov stability theorem and by the linearization of the error dynamics, chaos synchronization between a third-order BLDCM and a second-order Duffing system are presented
V. M. Varatharaju; Badrilal Mathur; Udhayakumar
2011-01-01
Problem statement: The tuning methodology for the parameters of adaptive speed controller causes a transient deviation of the response from the set reference following variation in load torque in a permanent-magnet brushless DC (BLDC) motor drive system. Approach: This study develops a mathematical model of the BLDC drive system, firstly. Secondly, discusses a design of the closed loop drive system employing the Adaptive-Network-based Fuzzy Interference System (ANFIS). The nonlinear simulatio...
COMMUTATION TORQUE RIPPLE REDUCTION USING FUZZY LOGIC CONTROLLER IN SENSORLESS BRUSHLESS DC MOTOR
Natasha Thomas*
2015-01-01
Brushless Direct Current (BLDC) motors are widely used due to high reliability, simple frame, straight forward control, and low friction. BLDC motor has the advantage of high speed adjusting performance and power density. Speaking of the motor drive, the most important part is commutation control. On the other hand, they show a high torque ripple characteristics caused by nonideal commutation currents. This limits their application area especially for the low-voltage applications....
Off-line tuning of a PI speed controller for a permanent magnet brushless DC motor using DSP
Energy Technology Data Exchange (ETDEWEB)
Demirtas, Metin, E-mail: mdtas@balikesir.edu.t [Electrical and Electronics Engineering Department, Balikesir University, Balikesir (Turkey)
2011-01-15
In this paper, a new method of tuning Proportional Integral (PI) coefficients for a permanent magnet brushless DC (PMBLDC) motor drives is proposed. Artificial neural network is used to identify the whole system using maximum overshoot and settling time obtained from the application circuit for different K{sub p}-K{sub i} pairs. Optimal values of PI controller coefficients are obtained using genetic algorithm. Motion Control Kit (MCK243) is used to carry out digital motion control applications. The MCK243 kit includes a power module and a three-phase brushless motor. TMS320F243 programs are used for PMBLDC motor speed control. Experimental results are given to show the validity of this method.
SANITA C S, J T KUNCHERIA
2013-01-01
Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vital- The motor is operated in four steady state operating modes of torque-speed plane. To control a BLDC machine it is generally required to measure the speed and position of rotor by using the sensor because the inverter phases, acting at any time, must be commutated depending on the rotor position. Simulation of the proposed m...
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
Directory of Open Access Journals (Sweden)
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.
Controlling a Four-Quadrant Brushless Three-Phase dc Motor
Nola, F. J.
1986-01-01
Control circuit commutates windings of brushless, three-phase, permanent-magnet motor operating from power supply. With single analog command voltage, controller makes motor accelerate, drive steadily, or brake regeneratively, in clockwise or counterclockwise direction. Controller well suited for use with energy-storage flywheels, actuators for aircraft-control surfaces, cranes, industrial robots, and other electromechanical systems requiring bidirectional control or sudden stopping and reversal.
Position and Speed Control of Brushless DC Motors Using Sensorless Techniques and Application Trends
Jaime Gómez-Gil; José Carlos Gamazo-Real; Ernesto Vázquez-Sánchez
2010-01-01
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 introdu...
CheshmehBeigi, Hassan Moradi
2015-01-01
Abstract. This paper presents the design optimization and accurate electromagnetic field analysis of an 18-12 there phase Brushless dc motor (BLDCM) by using a three-dimensional Finite-Element analysis. Proposed motor will provide a wide range of air-gap flux control by a dc assisted field winding which is replaced with the permanent magnet in the rotor structure. In proposed BLDCM a simple dc current control is used and no brushes or slip rings are required to perform this control. To achiev...
Mechatronical Design Studies on Small Brushless Motors
W. Amrhein; S. Silber; K. Nenninger; Trauner, G.; R. Schöb
2003-01-01
Brushless DC- and AC-permanent-magnet motors controlled by powerful micro-controller electronics have opened up a significant share of the small motor market in the last years. Based on the mechanical low cost construction of single-phase motor the paper presents electronic drive concepts to improve the performance and for special applications also the lifetime of brushless motors. The tangential and radial forces acting on the rotor are controlled by special phase current curves to reduce th...
Development of a Practical Low-Cost µC based Brushless DC Motor Controller using Proteus
Y. L. Karnavas; Ch. L. Liagkos
2012-01-01
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 c...
Eriksson, Emil
2014-01-01
The goal of this project is to design and simulate the electromagnetic circuit of a brushless dc motor meant to be used in a remote operated underwater vehicle. The final product is a drawing, see appendix A & B, of the design and the most relevant parameters are: R = 0.94 ohm and L =1.18mH per phase; at 250 rpm the motor produces 478.8W of power and 18.3Nm of torque at a line voltage of 78.8V rms and a current of 4A. The losses are estimated to 55W, but will likely be higher. Further stu...
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.
Aspects Concerning the Torque Ripple Control of the Brushless DC Motor
BALUTA, G.; URSANU, G.
2013-01-01
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 apply...
Energy Technology Data Exchange (ETDEWEB)
Tomita, M.; Doki, S.; Okuma, S. [Nagoya University, Nagoya (Japan); Yamaguchi, H. [The Aichi Electric Co. Ltd., Aichi (Japan)
1998-04-01
Sensorless starting and low speed drive of a cylindrical brushless DC motor with un-known load have been a difficult problem because an electromotive force does not arise enough at the starting and at low speeds and an inductance is constant irrespective of rotor position. In this paper, it is proposed to paste non-magnetic material and to measure a voltage of an opened phase to realize sensorless starting and low speed drives. The method is shown very feasible by experiments. 13 refs., 17 figs., 2 tabs.
Directory of Open Access Journals (Sweden)
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.
Energy Technology Data Exchange (ETDEWEB)
Hur, J.; Chun, Y.D.; Lee, J.; Hyun, D.S. [Hanyang Univ., Seoul (Korea, Republic of). Dept. of Electrical Engineering
1998-09-01
The distribution of radial force density in brushless permanent magnet DC motor is not uniform in axial direction. The analysis of radial force density has to consider the 3-D shape of teeth and overhand, because the radial force density causes vibration and acts on the surface of teeth inconstantly. For the analysis, a new 3-D equivalent magnetic circuit network method is used to account the rotor movement without remesh. The radial force density is calculated and analyzed by Maxwell stress tensor and discrete Fourier transform (DFT) respectively. The results of 3-D equivalent magnetic circuit method have been compared with the results of 3-D FEM.
Energy Technology Data Exchange (ETDEWEB)
Hur, J.; Hyun, D.S. [Hanyang Univ., Seoul (Korea, Republic of). Dept. of Electrical Engineering; Hong, J.P. [Changwon National Univ. (Korea, Republic of). Dept. of Electrical Engineering
1998-09-01
The method of reducing cogging torque and improving average torque has been studied by changing the dead zone angle of trapezoidal magnetization distribution of ring type rotor magnet in brushless DC motor (BLDCM). Because BLDCM has 3-D shape of overhang, 3-D analysis should be used for exact computation of its magnetic field. 3-D equivalent magnetic circuit network method (3-D EMCN) which can analyze an accurate 3-D magnetic field has been introduced. The analysis results of cogging torque using 3-D EMCN are compared with ones of 3-D finite element method (3-D FEM) and experimental data.
Energy Technology Data Exchange (ETDEWEB)
Ryoo, Si Yeong [Cheonan National Technical College (Korea); Lee, Doo Soo [Hanyang University (Korea)
2001-04-01
In this paper, a method of reducing torque ripples caused by phase winding inductances in BLDCM(Brushless DC Motor) drives is presented. In order to compensate the inductive current delays, commutation angle is controlled by the value compensating angle varied in accordance with rotational speed. Using the microprocessor AVR 8515, the proposed compensator is implemented and experiments are done with a 4-pole 3-phase BLDCM. The results show the remarkable reduction of torque ripple at whole speed ranges. (author). 9 refs., 22 figs., 2 tabs.
Demerdash, N. A. O.; Nehl, T. W.
1979-01-01
A mathematical model was developed and computerized simulations were obtained for a brushless dc motor. Experimentally obtained oscillograms of the machine phase currents are presented and the corresponding current and voltage waveforms for various modes of operation of the motor are presented and discussed.
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.
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.
Aspects Concerning the Torque Ripple Control of the Brushless DC Motor
Directory of Open Access Journals (Sweden)
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.
Luo, Shaohua; Hou, Zhiwei; Chen, Zhong
2015-12-01
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
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.
Energy Technology Data Exchange (ETDEWEB)
Lukaniszyn, M.; Jagiela, M.; Wrobel, R.
2003-04-16
A brushless, permanent magnet, three-phase disc-type salient-pole DC motor with co-axial flux in the stator is considered. Electromechanical properties of a basic eight-pole motor are compared with those for a 16-pole one of the same volume, in order to contrast the two potential candidates for variable-speed, low-cost drives. As a basis of the comparative analysis, 3D FEM magnetic field modelling and circuit analysis considering an electronic commutator are employed. Increasing the number of poles results in unfavourable raising in the switching frequency. The eight-pole motor construction has been shown in simulations to have higher efficiency and lower power losses than its 16-pole counterpart. (Author)
Position and Speed Control of Brushless DC Motors Using Sensorless Techniques and Application Trends
Directory of Open Access Journals (Sweden)
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.
Gamazo-Real, José Carlos; Vázquez-Sánchez, Ernesto; Gómez-Gil, Jaime
2010-01-01
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. PMID:22163582
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.
Directory of Open Access Journals (Sweden)
V. M. Varatharaju
2011-01-01
Full Text Available Problem statement: The tuning methodology for the parameters of adaptive speed controller causes a transient deviation of the response from the set reference following variation in load torque in a permanent-magnet brushless DC (BLDC motor drive system. Approach: This study develops a mathematical model of the BLDC drive system, firstly. Secondly, discusses a design of the closed loop drive system employing the Adaptive-Network-based Fuzzy Interference System (ANFIS. The nonlinear simulation model of the BLDC motors drive system with ANFIS control based is simulated in the MATLAB/SIMULINK platform. Results: The necessitated data for training the ANFIS control is generated by simulation of the system with conventional PI controller. Conclusion: The simulated electromagnetic torque and rotor speed signify the superiority of the proposed technique over the classical method.
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.
Improved transistor-controlled and commutated brushless DC motors for electric vehicle propulsion
Demerdash, N. A.; Miller, R. H.; Nehl, T. W.; Nyamusa, T. A.
1983-01-01
The development, design, construction, and testing processes of two electronically (transistor) controlled and commutated permanent magnet brushless dc machine systems, for propulsion of electric vehicles are detailed. One machine system was designed and constructed using samarium cobalt for permanent magnets, which supply the rotor (field) excitation. Meanwhile, the other machine system was designed and constructed with strontium ferrite permanent magnets as the source of rotor (field) excitation. These machine systems were designed for continuous rated power output of 15 hp (11.2 kw), and a peak one minute rated power output of 35 hp (26.1 kw). Both power ratings are for a rated voltage of 115 volts dc, assuming a voltage drop in the source (battery) of about 5 volts. That is, an internal source voltage of 120 volts dc. Machine-power conditioner system computer-aided simulations were used extensively in the design process. These simulations relied heavily on the magnetic field analysis in these machines using the method of finite elements, as well as methods of modeling of the machine power conditioner system dynamic interaction. These simulation processes are detailed. Testing revealed that typical machine system efficiencies at 15 hp (11.2 kw) were about 88% and 84% for the samarium cobalt and strontium ferrite based machine systems, respectively. Both systems met the peak one minute rating of 35 hp.
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.
Energy Technology Data Exchange (ETDEWEB)
Kasa, N.; Watanabe, H. [Tokyo Metropolitan Institute of Technology, Tokyo (Japan)
1998-02-01
For sensorless controlled salient-pole brushless DC motor drives, a new AC current injection method which estimates the position angle with d and q inductances was proposed. However, the estimated position angles include the errors which are casued by an unsymmetrical construction based on the mechanical or magnetic tolerance on the motor. It is difficult to correct the errors with hardwares like filters. An error correcting technique of an estimated position angle and rotating speed is proposed. The errors which are casued by the unsymmetrical construction appear as a modeling error of the motor periodically. Then, a neuro-like fuzzy technique can be applied to correct the error of the estimated position angle. When the motor is controlled at a commanded speed, the speed of the motor contains unexpected cyclic speed errors. The fuzzy model which estimates these errors is learned with a back propagation method which uses the cyclic errors as a teacher signal. Then, the system corrects the estimated position angles with the estimated errors. From the experimental results, the proposed sensorless control system could estimate more accurate position angle than conventional systems could. 18 refs., 12 figs., 1 tab.
Direct Back EMF Detection Method for Sensorless Brushless DC (BLDC) Motor Drives
Shao, Jianwen
2003-01-01
Brushlesss dc (BLDC) motors and their drives are penetrating the market of home appliances, HVAC industry, and automotive applications in recent years because of their high efficiency, silent operation, compact form, reliability, and low maintenance. Traditionally, BLDC motors are commutated in six-step pattern with commutation controlled by position sensors. To reduce cost and complexity of the drive system, sensorless drive is preferred. The existing sensorless control scheme with the c...
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.
Analysis and testing of a double armature brushless dc linear motor with NdFeB permanent magnets
Energy Technology Data Exchange (ETDEWEB)
Filho, A.F.F. [Rio Grande do Sul Univ., Porto Alegre (Brazil). Lab. of Electr. Machines; Basak, A. [Wolfson Centre for Magnetics Technology, Cardiff School of Engineering, Cardiff Univ., Cardiff, Wales (United Kingdom)
1998-07-01
The use of high-energy product NdFeB permanent magnets benefits the design and features of a double armature brushless dc linear motor. As the linear motor is also slotless, its 5 mm airgap requires a source of high flux to overcome the reluctance and produce an adequate amount of force. The linear motor employs a topology that makes use of five permanent magnets to provide excitation flux. The permanent magnets are arranged in such a way that maximises the force the linear motor can deliver. The actuator produces a force up to 86.2 N at an armature current of 4.5 A. However, the topology makes the actuator prone to saturation. It affects the operation point of the permanent magnets, reduces the airgap flux density and the force, and increases flux leakage. To avoid saturation, a flux compensation scheme was conceived. The results are presented and assessed by means of finite element simulation and by experimental results that presented a good agreement. (orig.)
Analysis and testing of a double armature brushless dc linear motor with NdFeB permanent magnets
International Nuclear Information System (INIS)
The use of high-energy product NdFeB permanent magnets benefits the design and features of a double armature brushless dc linear motor. As the linear motor is also slotless, its 5 mm airgap requires a source of high flux to overcome the reluctance and produce an adequate amount of force. The linear motor employs a topology that makes use of five permanent magnets to provide excitation flux. The permanent magnets are arranged in such a way that maximises the force the linear motor can deliver. The actuator produces a force up to 86.2 N at an armature current of 4.5 A. However, the topology makes the actuator prone to saturation. It affects the operation point of the permanent magnets, reduces the airgap flux density and the force, and increases flux leakage. To avoid saturation, a flux compensation scheme was conceived. The results are presented and assessed by means of finite element simulation and by experimental results that presented a good agreement. (orig.)
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
Directory of Open Access Journals (Sweden)
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.
Shaohua Luo; Zhiwei Hou; Zhong Chen
2015-01-01
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 preven...
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.
Weiran Wang; Xiaolian Wang; Fei Tan; Zhanshi Sheng
2013-01-01
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 simulat...
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。
García Haro, Juan Miguel
2011-01-01
Este proyecto que el CAR inició hace pocos años tiene como objetivo principal el estudio y desarrollo de nuevas tecnologías en el campo de actuación y control automático, que servirá de base para otras futuras investigaciones dentro del centro. La tecnología a la que se hace mención se refiere al control de actuadores basados en motores DC brushless (BLDC Motors) empleando el sistema de hardware embebido CompactRIO y programación LabVIEW de National Instruments. Tradicionalmente se emplea en ...
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.
Comparative analysis of some brushless motors based on catalog data
Anton Kalapish; Dimitar Sotirov; Dimitrina Koeva
2005-01-01
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.
Comparative analysis of some brushless motors based on catalog data
Directory of Open Access Journals (Sweden)
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.
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
Directory of Open Access Journals (Sweden)
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.
International Nuclear Information System (INIS)
This paper presents a method to determine the torque constant and the torque-speed-current characteristics of a brushless DC (BLDC) motor by utilizing back-EMF variation of nonenergized phase. It also develops a BLDC motor controller with a digital signal processor (DSP) to monitor its current, voltage and speed in real time. Torque-speed-current characteristics of a BLDC motor are determined by using the proposed method and the developed controller. They are compared with the torque-speed-current characteristics measured by dynamometer experimentally. This research shows that the proposed method is an effective method to determine the torque constant and the torque-speed-current characteristics of the BLDC motor without using dynamometer
Energy Technology Data Exchange (ETDEWEB)
Jang, G.H. [Department of Mechanical Engineering, Hanyang University, 17 Haengdangdong, Seongdonggu, Seoul 133-791 (Korea, Republic of)]. E-mail: ghjang@hanyang.ac.kr; Yeom, J.H. [Department of Mechanical Engineering, Hanyang University, 17 Haengdangdong, Seongdonggu, Seoul 133-791 (Korea, Republic of); Kim, M.G. [Department of Mechanical Engineering, Hanyang University, 17 Haengdangdong, Seongdonggu, Seoul 133-791 (Korea, Republic of)
2007-03-15
This paper presents a method to determine the torque constant and the torque-speed-current characteristics of a brushless DC (BLDC) motor by utilizing back-EMF variation of nonenergized phase. It also develops a BLDC motor controller with a digital signal processor (DSP) to monitor its current, voltage and speed in real time. Torque-speed-current characteristics of a BLDC motor are determined by using the proposed method and the developed controller. They are compared with the torque-speed-current characteristics measured by dynamometer experimentally. This research shows that the proposed method is an effective method to determine the torque constant and the torque-speed-current characteristics of the BLDC motor without using dynamometer.
Jang, G. H.; Yeom, J. H.; Kim, M. G.
2007-03-01
This paper presents a method to determine the torque constant and the torque-speed-current characteristics of a brushless DC (BLDC) motor by utilizing back-EMF variation of nonenergized phase. It also develops a BLDC motor controller with a digital signal processor (DSP) to monitor its current, voltage and speed in real time. Torque-speed-current characteristics of a BLDC motor are determined by using the proposed method and the developed controller. They are compared with the torque-speed-current characteristics measured by dynamometer experimentally. This research shows that the proposed method is an effective method to determine the torque constant and the torque-speed-current characteristics of the BLDC motor without using dynamometer.
Development of a hermetically sealed brushless DC motor for a J-T cryocooler
Joscelyn, Edwin; Hochler, Irwin; Ferri, Andrew; Rott, Heinz; Soukaris, Ted
1996-01-01
This development was sponsored by Ball Aerospace for the Cryogenic On-Orbit LongLife Active Refrigerator (COOLLAR) program. The cryocooler is designed to cool objects to 65 K and operate in space for at least 7 years. The system also imports minimal impact to the spacecraft in terms of vibration and heat. The basic Joule-Thompson cycle involves compressing a working fluid, nitrogen in this case, at near-constant temperature from 17.2 KPa to 6.89 MPa. The nitrogen is then expanded through a Joule-Thompson valve. The pure nitrogen gas must be kept clean; therefore, any contamination from motor organic materials must be eliminated. This requirement drove the design towards sealing of the motor within a titanium housing without sacrificing motor performance. It is estimated that an unsealed motor would have contributed 1.65 g of contaminants, due to the organic insulation and potting materials, over the 7-year life. This paper describes the motor electrical and mechanical design, as well as the sealing difficulties encountered, along with their solutions.
Analysis of a Magnetic Field According to Eccentricity in Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Jang, S. M.; Yoon, I. K.; Lee, S. H. [Chungnam National University, Taejeon (Korea); Choi, S. K.; Lee, J. H. [Hanbat National University, Taejeon (Korea)
2002-07-01
Vibration, giving rise to acoustical noise, is an important index of motor performance. The unbalance force due to rotor eccentricity caused by manufacturing imprecision or bearing defects is one possible source of excitation to vibration. With the advent of new high-energy magnetic material together with high precision motor applications, magnetic sources of vibration are becoming more serious. This paper introduces two types of high-speed slotless permanent magnet (PM) machine for electro-mechanical battery and investigates unbalance force due to static eccentricity with finite element method. (author). 4 refs., 9 figs.
Cogging Torque Reduction in Brushless DC Motors Using Slot-Opening Shift
Directory of Open Access Journals (Sweden)
SAIED, S. A.
2009-02-01
Full Text Available In this paper, two new methods for the stator skew are introduced. In contrary with the conventional stator skew, this paper is concentrate on the slot-opening skew. The simula-tion result by finite element shows a considerable reduction in the cogging torque of the motors, the new methods are applied to. Moreover the simulations justify that the back-EMF shape remains trapezoidal for various skew angles in contrary with that in the conventional skew, this fact makes the method highly applicable in BLDC motors.
Variable Reluctance Rotating Shaft Sensor for DC Brushless Vernier Reluctance Motor
Multon, Bernard; Geoffroy, Marc; Desesquelles, Pierre-François
1992-01-01
In this paper, a variable Reluctance Rotating Shaft Sensor made with a stack of magnetic sheet a Switched Reluctance Motor is studied. The magnetic coupling are taken into eaccount and an 3D FE modelization is used. Synchronous demodulation is used to obtain position signals.
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;
2015-01-01
the stator. The hub motor construction restricts the available conductive paths for heat dissipation from the stator to the ambient only through the shaft. In contrast to an internal rotor structure, where the stator winding losses are diffused via conduction, here convection plays a major role in...
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。
Nongrounded Common-Mode Equivalent Circuit for Brushless DC Motor Driven by PWM Inverter
Maetani, Tatsuo; Isomura, Yoshinori; Watanabe, Akihiko; Iimori, Kenichi; Morimoto, Shigeo
This paper describes nongrounded common-mode equivalent circuit for a motor driven by a voltage-source PWM inverter. When the capacitance of the rotor was small, the phenomenon that polarity of the common mode voltage and shaft voltage reversed was observed. In order to model this phenomenon, the bridge type equivalent circuit is proposed. It is verified with the calculation and experiment that shaft voltage values and polarity are accurately calculated with the proposed equivalent circuit.
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.
Energy Technology Data Exchange (ETDEWEB)
Singh, Bhim; Swamy, C.L. Putta; Singh, B.P. [Department of Electrical Engineering, Indian Institute of Technology, Delhi, New Delhi (India)
1997-12-19
This paper deals with the analysis and development of a permanent magnet brushless DC (PMBLDC) motor drive coupled to a pump load powered by solar photovoltaic (PV) array for water pumping system. A simple low-cost prototype controller has been designed and developed without current and position sensors which reduces drastically the overall cost of the drive system. This controller is used to test the dynamic behavior of the PMBLDC motor drive system. The mathematical model of the system is developed with a view to carry out a comparison between experimental and simulated response of the drive system. A simple filter circuit is incorporated in between PV-array and an inverter to reduce ripples and to improve the performance of the PV-array. The necessary computer algorithm is developed to analyze the performance under different conditions of varying solar insolation for a pump load
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.
International Nuclear Information System (INIS)
An inverter topology and control scheme has been developed that can drive low-inductance, surface-mounted permanent magnet motors over the wide constant power speed range required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC)[1]. The DMIC can drive either the Permanent Magnet Synchronous Machine (PMSM) with sinusoidal back emf, or the brushless dc machine (BDCM) with trapezoidal emf in the motoring and regenerative braking modes. In this paper we concentrate on the BDCM under high-speed motoring conditions. Simulation results show that if all motor and inverter loss mechanisms are neglected, the constant power speed range of the DMIC is infinite. The simulation results are supported by closed form expressions for peak and rms motor current and average power derived from analytical solution to the differential equations governing the DMIC/BDCM drive for the lossless case. The analytical solution shows that the range of motor inductance that can be accommodated by the DMIC is more than an order of magnitude such that the DMIC is compatible with both low- and high-inductance BDCMs. Finally, method is given for integrating the classical hysteresis band current control, used for motor control below base speed, with the phase advance of DMIC that is applied above base speed. The power versus speed performance of the DMIC is then simulated across the entire speed range
Energy Technology Data Exchange (ETDEWEB)
Lawler, J.S.
2001-10-29
An inverter topology and control scheme has been developed that can drive low-inductance, surface-mounted permanent magnet motors over the wide constant power speed range required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC) [1]. The DMIC can drive either the Permanent Magnet Synchronous Machine (PMSM) with sinusoidal back emf, or the brushless dc machine (BDCM) with trapezoidal emf in the motoring and regenerative braking modes. In this paper we concentrate on the BDCM under high-speed motoring conditions. Simulation results show that if all motor and inverter loss mechanisms are neglected, the constant power speed range of the DMIC is infinite. The simulation results are supported by closed form expressions for peak and rms motor current and average power derived from analytical solution to the differential equations governing the DMIC/BDCM drive for the lossless case. The analytical solution shows that the range of motor inductance that can be accommodated by the DMIC is more than an order of magnitude such that the DMIC is compatible with both low- and high-inductance BDCMs. Finally, method is given for integrating the classical hysteresis band current control, used for motor control below base speed, with the phase advance of DMIC that is applied above base speed. The power versus speed performance of the DMIC is then simulated across the entire speed range.
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.
Energy Technology Data Exchange (ETDEWEB)
Tomita, M.; Doki, S.; Okuma, S. [Nagoya University, Nagoya (Japan); Yamaguchi, H. [The Aichi Electric Co. Ltd., Aichi (Japan)
1997-09-20
A rotor position estimation of a cylindrical brushless dc motor at a standstill has been difficult. Therefore, a torque control of a motor has been difficult at starting of the motor, and the realization of the position estimation at a standstill has been desired. This paper proposes a simple processing of a rotor that non-magnetic materials are pasted on a rotor surface. This processing generates an eddy current on non-magnetic materials and causes an opened phase voltage change according to a rotor position. The experimental results used a microcomputer show that it is possible to estimate a rotor position of the cylindrical motor despite of a standstill by using the opened phase voltage change. 10 refs., 15 figs.
Demerdash, N. A.; Nehl, T. W.
1980-01-01
A comprehensive digital model for the analysis and possible optimization of the closed loop dynamic (instantaneous) performance of a power conditioner fed, brushless dc motor powered, electromechanical actuator system (EMA) is presented. This model was developed for the simulation of the dynamic performance of an actual prototype EMA built for NASA-JSC as a possible alternative to hydraulic actuators for consideration in Space Shuttle Orbiter applications. Excellent correlation was achieved between numerical model simulation and experimental test results obtained from the actual hardware. These results include: various current and voltage waveforms in the machine-power conditioner (MPC) unit, flap position as well as other control loop variables in response to step commands of change of flap position. These results with consequent conclusions are detailed in the paper.
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.
International Nuclear Information System (INIS)
Previous theoretical work has shown that when all loss mechanisms are neglected the constant power speed range (CPSR) of a brushless dc motor (BDCM) is infinite when the motor is driven by the dual-mode inverter control (DMIC)[1,2]. In a physical drive, losses, particularly speed-sensitive losses, will limit the CPSR to a finite value. In this paper we report the results of laboratory testing of a low-inductance, 7.5-hp BDCM driven by the DMIC. The speed rating of the test motor rotor limited the upper speed of the testing, and the results show that the CPSR of the test machine is greater than 6:1 when driven by the DMIC. Current wave shape, peak, and rms values remained controlled and within rating over the entire speed range. The laboratory measurements allowed the speed-sensitive losses to be quantified and incorporated into computer simulation models, which then accurately reproduce the results of lab testing. The simulator shows that the limiting CPSR of the test motor is 8:1. These results confirm that the DMIC is capable of driving low-inductance BDCMs over the wide CPSR that would be required in electric vehicle applications
Energy Technology Data Exchange (ETDEWEB)
Lawler, J.S.
2001-10-29
Previous theoretical work has shown that when all loss mechanisms are neglected the constant power speed range (CPSR) of a brushless dc motor (BDCM) is infinite when the motor is driven by the dual-mode inverter control (DMIC) [1,2]. In a physical drive, losses, particularly speed-sensitive losses, will limit the CPSR to a finite value. In this paper we report the results of laboratory testing of a low-inductance, 7.5-hp BDCM driven by the DMIC. The speed rating of the test motor rotor limited the upper speed of the testing, and the results show that the CPSR of the test machine is greater than 6:1 when driven by the DMIC. Current wave shape, peak, and rms values remained controlled and within rating over the entire speed range. The laboratory measurements allowed the speed-sensitive losses to be quantified and incorporated into computer simulation models, which then accurately reproduce the results of lab testing. The simulator shows that the limiting CPSR of the test motor is 8:1. These results confirm that the DMIC is capable of driving low-inductance BDCMs over the wide CPSR that would be required in electric vehicle applications.
Remedial brushless AC operation of fault-tolerant doubly salient permanent-magnet motor drives
Zhao, W.; Chau, KT; Cheng, M.; Ji, J.; Zhu, X.
2010-01-01
The doubly salient permanent-magnet (DSPM) machine is a new class of stator-PM brushless machines, which inherently offers the fault-tolerant feature. In this paper, a new operation strategy is proposed and implemented for fault-tolerant DSPM motor drives. The key is to operate the DSPM motor drive in a remedial brushless ac (BLAC) mode under the open-circuit fault condition, while operating in the conventional brushless dc mode under normal condition. Both cosimulation and experimental resul...
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.
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.
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.
International Nuclear Information System (INIS)
Highlights: → Employing the BLDC motor in water pumping systems. → Utilizing the ZSI as a single-stage power converter in the PV water pumping systems based on BLDC motor. → Improvement of the conventional IC MPPT method with the fuzzy logic control scheme to save more energy from the PV array. → Taking the advantages of the DTC drive of the BLDC motor. → 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 the energy saving aspect of
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
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.
International Nuclear Information System (INIS)
Highlights: ► A new sensorless BLDC motor drives based on L∞-induced observer has been proposed. ► A design and analysis of robust stochastic L∞-induced observer has been carried out. ► We present theoretical aspects of design for proposed, Kalman, sliding-mode methods. ► We compare three sensorless topologies from four aspects of simulation performance. ► Unique merit of proposed method makes it suitable for high-performance application. - Abstract: This paper aims to present an analysis and design of a high-performance speed-sensorless control scheme for a three-phase brushless DC (BLDC) motor drive by means of a novel observer technique in the induced L∞ norm setting, named robust stochastic L∞-induced observer, with the purpose of reducing torque ripple and increasing system robustness. The proposed observer is used for estimating the phase-to-phase trapezoidal back-electromotive-force (back-EMF) for the BLDC motor merely via utilizing measured line stator currents and voltages in such a way that by estimating the back-EMF, position and speed of the rotor is readily obtained. In contrast to the conventional back-EMF sensing methods, this strategy of utilized drive requires no filtering of current and voltage; furthermore, it does not suffer from any sensitivity to switching noises. Owing to that high-speed operation is vital for a motor, the varying input voltage method is used for realizing the minimization of commutation-torque-ripple in a parallel way to the proposed method since drive performance intensely degrades in this mode. Apart from analytic investigation of the proposed method, two other types of observers, namely, the sliding-mode observer and Kalman filter are compared with the proposed method for the aim of determining steady-state accuracy, dynamic performance, parameter and noise sensitivity, low-speed-operation performance, and computational complexity. Finally, the proposed system has been simulated in different operating
International Nuclear Information System (INIS)
The paper presents a comparison between the performances of exterior-rotor permanent magnet brushless motors with distributed windings and the performances of exterior-rotor permanent magnet brushless motors with concentrated windings. Finite element method analysis is employed to determine the performance of each motor. It is shown that motors with concentrated windings and similar slot and pole numbers exhibit similar or better performances than motors with distributed windings for brushless AC (BLAC) operation mode and brushless DC (BLDC) operation mode as well
Reliability of Permanent Magnet Brushless D.C. Drives Using IGBT’s
NITIN SANADHYA; RAMESH C. KUMHAR; PRAKASH SUNDARAM; PANKAJ KUMAR; SHAH RIGAL
2013-01-01
Brushless DC (BLDC) motors are one of the electrical drives that are rapidly gaining popularity, due to their high efficiency, good dynamic response and low maintenance. This paper briefly reviews the fundamentals behind the motor. Within the last decade, the research and development on BLDC motor drives have been focused on the motor topology design and optimization as well as the motor control strategies. Nevertheless, most of these converter topologies employ the hard-switching technique w...
Redundant speed control for brushless Hall effect motor
Nola, F. J. (Inventor)
1973-01-01
A speed control system for a brushless Hall effect device equipped direct current (D.C.) motor is described. Separate windings of the motor are powered by separate speed responsive power sources. A change in speed, upward or downward, because of the failure of a component of one of the power sources results in a corrective signal being generated in the other power source to supply an appropriate power level and polarity to one winding to cause the motor to be corrected in speed.
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
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.%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。
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.
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.
A. Santhi Mary Antony; Ramya, D.; J. Sangeetha
2015-01-01
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...
Mechanism For Adjustment Of Commutation Of Brushless Motor
Schaefer, Richard E.
1995-01-01
Mechanism enables adjustment of angular position of set of Hall-effect devices that sense instantaneous shaft angle of brushless dc motor. Outputs of sensors fed to commutation circuitry. Measurement of shaft angle essential for commutation; that is, application of voltage to stator windings must be synchronized with shaft angle. To obtain correct angle measurement for commutation, Hall-effect angle sensors positioned at proper reference angle. The present mechanism accelerates adjustment procedure and makes it possible to obtain more accurate indication of minimum-current position because it provides for adjustment while motor running.
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.
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 .
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
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.
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...
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.
E. Kaliappan; C. Chellamuthu
2012-01-01
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 te...
Application of Synchronous Brushless Motors in Electric Hand Tools
Dirba, J.; Lavrinovicha, L.; Levin, N.; Pugachev, V.
2012-01-01
In the paper, the possibilities to apply synchronous brushless motors in the electric hand tools are considered. The potential of such motors is estimated in a wide range of characteristics. In particular, estimation is made for the electric hand plane with a synchronous motor having outer rotor and excitation from permanent magnets.
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.
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.
Permanent magnet brushless drives
Chan, CC; Xia, W.; Jiang, JZ; Chau, KT; Zhu, ML
1998-01-01
The purpose of this paper is to present an optimal efficiency control scheme for constant power operation of phase decoupling (PD) PM brushless DC motor drives. The key is to adaptively adjust the advanced conduction angle to minimize the system losses for a given operation point in the constant power region. The strategy for constant power operation of PD PM brushless DC motor drives is exemplified using a 5-phase 22-pole PD PM brushless DC motor. In the sections that follow, the newly-devel...
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.
Slotless brushless permanent magnet motor and winding topologies
International Nuclear Information System (INIS)
In the paper, the merits of alternative slotless brushless permanent magnet motor and winding topologies are investigated, using 2-D analytical models embodied with CAD design software. The design optimisation of both internal and external rotor motors, with and without stator back-iron, and with either overlapping or non-overlapping winding, is considered. (orig.)
Torque prediction using the flux-MMF diagram in AC, DC, and reluctance motors
Staton, D.A.; Deodhar, R.P.; Soong, W.L.; Miller, T.J.E.
1996-01-01
This paper uses the flux-MMF diagram to compare and contrast the torque production mechanism in seven common types of electric motor. The flux-MMF diagram is a generalized version of the flux-linkage versus current (ψ-i) diagram for switched-reluctance motors. It is illustrated for switched-reluctance, synchronous-reluctance, induction, brushless AC, brushless DC, interior PM and commutator motors. The calculated flux-MMF diagrams for motors with the same electromagnetic volume, airgap, slotf...
Power losses in outside-spin brushess DC motor
Andrada Gascón, Pedro; Torrent Burgués, Marcel; Perat Benavides, Josep Ignasi; Blanqué Molina, Balduino
2004-01-01
Outside-spin brushless D.C. motors are an alternative to conventional D.C. brush permanent magnet motors, especially in applications that require low power and costs and in which high inertia effects are advantageous. This paper presents a procedure for computing power losses in these kinds of machines. Expressions are derived for predicting copper losses, power interrupter losses, stator iron losses in the tooth and in the yoke, mechanical losses, friction and windage. Stray l...
Performance of Halbach magnetized brushless AC motors
Zhu, Z.Q.; Xia, Z.P.; Shi, Y.F.; Howe, D.; Pride, A.; X. J. Chen
2003-01-01
The steady-state performance of Halbach magnetized brushless ac machines when operated in constant torque and flux-weakening modes is investigated both theoretically and experimentally, with particular emphasis on the influence of cross-coupling magnetic saturation on the torque capability.
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.
Advanced conduction angle control of permanent magnet brushless motor drives
Gan, J.; Chan, CC; Jiang, JZ; Chau, KT
1998-01-01
A novel advanced conduction angle control scheme for permanent magnet brushless motor drives is presented in this paper. The originality of this scheme is to employ the transformer EMF in stator windings to counteract the rotational EMF by controlling the advanced conduction angle when the motor drive operates above the base speed. Hence the constant-power operation region can be extended considerably, even though the current regulator is in saturation. The attractive feature of the proposed ...
Brushless PM Motor Optimization using Bees Algorithm and Finite Element Analysis
Reza Ilka; syed asghar Gholamian; spideh Valiollahi
2011-01-01
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 ...
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.
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.
High torque DC motor fabrication and test program
Makus, P.
1976-01-01
The testing of a standard iron and standard alnico permanent magnet two-phase, brushless dc spin motor for potential application to the space telescope has been concluded. The purpose of this study was to determine spin motor power losses, magnetic drag, efficiency and torque speed characteristics of a high torque dc motor. The motor was designed and built to fit an existing reaction wheel as a test vehicle and to use existing brass-board commutation and torque command electronics. The results of the tests are included in this report.
Design of a magnetic-geared outer-rotor permanent-magnet brushless motor for electric vehicles
Chau, KT; Zhang, D.; Jiang, JZ; Liu, C.; Y. Zhang
2007-01-01
This paper proposes a novel in-wheel motor, which artfully integrates a magnetic gear into a permanent-magnet brushless (PMBL) DC motor so that they can share a common PM rotor, hence offering both high efficiency and high power density. Moreover, the low-speed requirement for direct driving and the high-speed requirement for compact motor design can be achieved simultaneously. A 2-kW 600/4400-rpm magnetic-geared outer-rotor PMBL DC motor is designed and analyzed, which is particularly suitab...
Demerdash, N. A. O.; Nehl, T. W.
1979-01-01
A description and user's guide of the computer program developed to simulate the dynamics of an electromechanical actuator for aerospace applications are presented. The effects of the stator phase currents on the permanent magnets of the rotor are examined. The voltage and current waveforms present in the power conditioner network during the motoring, regenerative braking, and plugging modes of operation are presented and discussed.
Demerdash, N. A. O.; Nehl, T. W.
1979-01-01
The development, fabrication and evaluation of a prototype electromechanical actuator (EMA) is discussed. Application of the EMA as a motor for control surfaces in aerospace flight is examined. A mathematical model of the EMA is developed for design optimization. Nonlinearities which complicate the mathematical model are discussed. The dynamics of the EMA from the underlying physical principles are determined and a discussion of similating the control logic by means of equivalent boolean expressions is presented.
Design and analysis of a new permanent magnet brushless DC machine
Gan, J.; Jiang, JZ; Chau, KT
2000-01-01
A new permanent magnet (PM) brushless dc machine with a unique feature of flux regulation is presented. The machine offers the merits of high density, high efficiency, high starting torque and wide constant power speed range.
Robust Control of a Brushless Servo Motor Using Sliding Mode
Radita Arindya
2012-01-01
The application of sliding mode techniques the position control of a brushless servo motor is discussed. Such control laws are well suited for electric power inverter. However, high frequency commutations are avoided due to the mechanical systems. Various recent schemes are studied and operated to derive control solutions which are technically feasible. In spite of straightforward applications the resulting systems show robust performances to parametric variations and disturbances. Robustness...
Maetani, Tatsuo; Isomura, Yoshinori; Watanabe, Akihiko; Iimori, Kenichi; Morimoto, Shigeo
This paper describes an ungrounded common-mode equivalent circuit for a motor driven by a voltage-source PWM inverter. When the capacitance of the rotor was is small, the reversal of the polarities of the common-mode voltage and shaft voltage is observed. In order to model this reversal, a bridge-type equivalent circuit is proposed. On the basis of calculations and experiment, it is found the values and polarity of the shaft voltage can be are accurately determined with the proposed equivalent circuit. Furthermore, the capacitance value of the insulated rotor required to make the shaft voltage equal to or less than the dielectric breakdown voltage of the bearing grease is obtained.
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。
Design of permanent magnet brushless motors with asymmetric air gap for electric vehicles
Chau, KT; Cui, W.; Jiang, JZ; Wang, Z.
2006-01-01
This paper proposes a cost-effective approach to design permanent magnet brushless dc motors for electric vehicles. The key is to shape the pole arc in such a way that the air gap length is at a maximum at the leading edge of each rotor pole arc and at a minimum at the trailing edge of the same pole arc, hence resulting in an asymmetric air gap. Thus, for a specified rotational direction, the distortion of air gap flux density and hence the torque ripple can be significantly suppressed. Also,...
Peacock, W. M.
1971-01-01
The ITOS with an improved attitude control system is described. A Hall generator brushless dc torque motor will replace the brush dc torque motor on ITOS-I and ITOS-A (NOAA-1). The four attitude horizon sensors will be replaced with two CO2 sensors for better horizon definition. An earth horizon splitting technique will be used to keep the earth facing side of the satellite toward earth even if the desired circular orbit is not achieved. The external appearance of the pitch control subsystem differs from TIROS-M (ITOS-1) and ITOS-A (NOAA-1) in that two instead of one pitch control electronics (PCE) boxes are used. Two instead of four horizon sensors will be used and one instead of two mirrors will be used for sensor scanning. The brushless motor will eliminate the requirement for brushes, strain gages and the telemetry for the brush wear. A single rotating flywheel, supported by a single bearing provides the gyroscopic stability and the required momentum interchange to keep one side of the satellite facing the earth. Magnetic torquing against the earth's magnetic field eliminates the requirement for expendable propellants which would limit satellite life in orbit.
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。
A Brushless Three-phase Synchronous Induction Motor with Two Stators
Inoue, Kenji; Yamashita, Hideo; Ohnogi, Yukio; Cingoski, Vlatko
1993-01-01
In this paper, a brushless three-phase synchronous induction motor with two stators which can self-start as a wound-rotor induction motor without external secondary resistance is proposed. In the proposed motor, two excitation schemes, separately and self-ones, can be realized. In the separately excitation scheme, the proposed machine can operate as a synchronous generator-motor. The proposed machine compared with traditional brushless synchronous motor with AC exciter has the following advan...
Analysis of brushless DC generator incorporating an axial field coil
Energy Technology Data Exchange (ETDEWEB)
Moradi, Hassan, E-mail: H_moradi@sbu.ac.i [Department of Electrical and Computer Engineering, Shahid Beheshti University, GC, Tehran (Iran, Islamic Republic of); Afjei, E. [Department of Electrical and Computer Engineering, Shahid Beheshti University, GC, Tehran (Iran, Islamic Republic of)
2011-07-15
Highlights: {yields} Magnetic analysis and experiment of a three-phase field assisted BLDC generator. {yields} Confirm the accuracy of the predicted flux-linkage by 2-D FE analysis. {yields} Confirm the accuracy of the FE analysis results by coupling the FE and BE method. {yields} Control the output voltage to a desired level by control the amplitude of the I{sub f}. {yields} Compatible with any application that requires variable speed operation. -- Abstract: This paper describes the magnetic analysis and experiment of a three-phase field assisted brushless DC (BLDC) generator. Unlike conventional BLDC generators, the permanent magnet is replaced with an assisted field winding. The stator and rotor are constructed with two dependent magnetically sets, in which each stator set includes nine salient poles with coil windings, and the rotor comprises of six salient poles. Other pole combinations also are possible. This construction is similar to a homopolar inductor alternator. The DC current in the assisted field winding produces axial flux which makes the rotor magnetically polarized at its ends. The magnetic field flows axially through the rotor shaft and closes through the stator teeth and the machine housing. To evaluate the generator performance, two types of analysis, namely the numerical technique and the experimental study have been utilized. In the numerical analysis, 2-D finite element (FE) analysis has been carried out using a MagNet CAD package (Infolytica Corporation Ltd.), to confirm the accuracy of the predicted flux-linkage characteristics, whereas in the experimental study, a prototype BLDC generator was constructed for verifying the actual performance. Furthermore, the evaluation method based on a hybrid numerical method coupling the finite element (FE) analysis and boundary element (BE) method, has been carried out to confirm the accuracy of the 2-D FE analysis simulation results. It provides not only confirmations of the investigation in results
Analysis of brushless DC generator incorporating an axial field coil
International Nuclear Information System (INIS)
Highlights: → Magnetic analysis and experiment of a three-phase field assisted BLDC generator. → Confirm the accuracy of the predicted flux-linkage by 2-D FE analysis. → Confirm the accuracy of the FE analysis results by coupling the FE and BE method. → Control the output voltage to a desired level by control the amplitude of the If. → Compatible with any application that requires variable speed operation. -- Abstract: This paper describes the magnetic analysis and experiment of a three-phase field assisted brushless DC (BLDC) generator. Unlike conventional BLDC generators, the permanent magnet is replaced with an assisted field winding. The stator and rotor are constructed with two dependent magnetically sets, in which each stator set includes nine salient poles with coil windings, and the rotor comprises of six salient poles. Other pole combinations also are possible. This construction is similar to a homopolar inductor alternator. The DC current in the assisted field winding produces axial flux which makes the rotor magnetically polarized at its ends. The magnetic field flows axially through the rotor shaft and closes through the stator teeth and the machine housing. To evaluate the generator performance, two types of analysis, namely the numerical technique and the experimental study have been utilized. In the numerical analysis, 2-D finite element (FE) analysis has been carried out using a MagNet CAD package (Infolytica Corporation Ltd.), to confirm the accuracy of the predicted flux-linkage characteristics, whereas in the experimental study, a prototype BLDC generator was constructed for verifying the actual performance. Furthermore, the evaluation method based on a hybrid numerical method coupling the finite element (FE) analysis and boundary element (BE) method, has been carried out to confirm the accuracy of the 2-D FE analysis simulation results. It provides not only confirmations of the investigation in results but also exact illustration for
Direct torque control of brushless DC drives with reduced torque ripple
Liu, Y.; Zhu, Z Q; Howe, D
2005-01-01
The application of direct torque control (DTC) to brushless ac drives has been investigated extensively. This paper describes its application to brushless dc drives, and highlights the essential differences in its implementation, as regards torque estimation and the representation of the inverter voltage space vectors. Simulated and experimental results are presented, and it is shown that, compared with conventional current control, DTC results in reduced torque ripple and a faster dynamic re...
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.
Bo Long; Shin Teak Lim; Ji Hyoung Ryu; Kil To Chong
2013-01-01
Regenerative braking provides an effective way of extending the driving range of battery powered electric vehicles (EVs). This paper analyzes the equivalent power circuit and operation principles of an EV using regenerative braking control technology. During the braking period, the switching sequence of the power converter is controlled to inverse the output torque of the three-phase brushless direct-current (DC) motor, so that the braking energy can be returned to the battery. Compared with ...
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)
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.
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.
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.
Modeling and control of a brushless DC axial flow ventricular assist device.
Giridharan, Guruprasad A; Skliar, Mikhail; Olsen, Donald B; Pantalos, George M
2002-01-01
This article presents an integrated model of the human circulatory system that incorporates circulatory support by a brushless DC axial flow ventricular assist device (VAD), and a feedback VAD controller designed to maintain physiologically sufficient perfusion. The developed integrated model combines a network type model of the circulatory system with a nonlinear dynamic model of the brushless DC pump We show that maintaining a reference differential pressure between the left ventricle and aorta leads to adequate perfusion for different pathologic cases, ranging from normal heart to left heart asystole, and widely varying physical activity scenarios from rest to exercise. PMID:12059002
Novel wide range speed control of permanent magnet brushless motor drives
Chau, KT; Chan, CC; Jiang, JZ; Xia, W
1995-01-01
This paper presents a novel approach for wide range speed control of permanent magnet (PM) brushless motor drive, including both sinewave and squarewave versions. As compared with conventional flux-weakening control, the approach takes definite advantages that it can be applied to the squarewave PM brushless motor drive directly, and even to the motor drive with negligible mutual inductances between phase windings. Moreover, it is easier to implement than flux-weakening control because no coo...
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.
Kraftmakher, Yaakov
2010-01-01
Experiments with an electric motor provide good opportunity to demonstrate some basic laws of electricity and magnetism. The aim of the experiments with a low-power dc motor is to show how the motor approaches its steady rotation and how its torque, mechanical power and efficiency depend on the rotation velocity. The tight relationship between the…
Design and analysis of a new multiphase polygonal-winding permanent-magnet brushless DC machine
Chan, CC; Jiang, J.; Chau, KT; Wang, Y.
2002-01-01
Summary form only given. The permanent-magnet brushless DC machine (PMBDM) inherently suffers from a short constant-power operating range. This paper proposes a new multiphase polygonal-winding PMBDM which can offer high-speed constant-power operation while maintaining high power density and high efficiency for electric vehicle (EV) propulsion.
Wang, Y.; Chau, KT; Chan, CC; Jiang, JZ
2002-01-01
In this paper, a new outer-rotor permanent magnet (PM) brushless dc drive is designed and analyzed. To enable this drive applicable to electric vehicles, its transient performances at both normal and flux-weakening operations are particularly focused. The distinct feature in design is due to the new motor configuration including the outer-rotor topology, the multipole magnetic circuit and the full slot-pitch coil span arrangement. The distinct feature in analysis is due to the development of ...
Energy Technology Data Exchange (ETDEWEB)
Jacob, D.
2005-07-01
This book proposes a presentation of AC electric motors essentially based on physics and technology. Its originality consists in avoiding to use mathematical formulations (like Park's transformation). The modeling retained, which only uses magnetic momentum, magnetic fields and reluctance concepts, leads simply and naturally to the vectorial control principle. The book develops some lecture elements which includes some topics rarely considered like the dimensioning of an asynchronous motor or of a single-phase brush-less motor. Experimental results illustrate the physical phenomena described and many original problems are resolved and commented at the end of each chapter. Content: signals and systems in electrotechnics, torque and rotating magnetic fields generation, asynchronous machine in permanent regime, speed variation of the asynchronous motor, special asynchronous motors, synchronous machine in permanent regime, brush-less motor, note about step motors, note about inverters, index. (J.S.)
DC Motor Control Predictive Models
Ravinesh Singh; Godfrey C. Onwubolu; Krishnileshwar Singh; Ritnesh Ram
2006-01-01
DC motor speed and position controls are fundamental in vehicles in general and robotics in particular. This study presents a mathematical model for correlating the interactions of some DC motor control parameters such as duty cycle, terminal voltage, frequency and load on some responses such as output current, voltage and speed by means of response surface methodology. For this exercise, a five-level full factorial design was chosen for experimentation using a peripheral interface controller...
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
Peacock, W. M.
1973-01-01
The National Aeronautics and Space Administration (NASA), launched ITOS-D with an improved attitude control system. A Hall generator brushless dc torque motor replaced the brush dc torque motor on Tiros-M and ITOS-A. Two CO2 attitude horizon sensors and one mirror replaced the four wideband horizon sensors and two mirrors on ITOS-1 and NOAA-1. Redundant pitch-control electronic boxes containing additional electronic circuitry for earth-splitting and brushless motor electronics were used. A method of generating a spacecraft earth-facing side reference for comparison to the time occurrence of the earth-splitting pulse was used to automatically correct pitch-attitude error. A single rotating flywheel, supported by a single bearing, provided gyroscopic stability and the required momentum interchange to keep one side of the satellite facing the earth. Magnetic torquing against the earth's magnetic field eliminated the requirement for expendable propellants which would limit satellite life in orbit.
Energy Technology Data Exchange (ETDEWEB)
Kraftmakher, Yaakov, E-mail: krafty@mail.biu.ac.i [Department of Physics, Bar-Ilan University, Ramat-Gan 52900 (Israel)
2010-07-15
Experiments with an electric motor provide good opportunity to demonstrate some basic laws of electricity and magnetism. The aim of the experiments with a low-power dc motor is to show how the motor approaches its steady rotation and how its torque, mechanical power and efficiency depend on the rotation velocity. The tight relationship between the mechanical and electrical parameters of the motor is clearly seen. The measurements are carried out with the ScienceWorkshop data-acquisition system and the DataStudio software from PASCO scientific. The experiments are well related to university courses of electricity and magnetism and can be used in undergraduate laboratories or for lecture demonstrations.
International Nuclear Information System (INIS)
Experiments with an electric motor provide good opportunity to demonstrate some basic laws of electricity and magnetism. The aim of the experiments with a low-power dc motor is to show how the motor approaches its steady rotation and how its torque, mechanical power and efficiency depend on the rotation velocity. The tight relationship between the mechanical and electrical parameters of the motor is clearly seen. The measurements are carried out with the ScienceWorkshop data-acquisition system and the DataStudio software from PASCO scientific. The experiments are well related to university courses of electricity and magnetism and can be used in undergraduate laboratories or for lecture demonstrations.
Power conditioning for large dc motors for space flight applications
Veatch, Martin S.; Anderson, Paul M.; Eason, Douglas J.; Landis, David M.
1988-01-01
The design and performance of a prototype power-conditioning system for use with large brushless dc motors on NASA space missions are discussed in detail and illustrated with extensive diagrams, drawings, and graphs. The 5-kW 8-phase parallel module evaluated here would be suitable for use in the Space Shuttle Orbiter cargo bay. A current-balancing magnetic assembly with low distributed inductance permits high-speed current switching from a low-voltage bus as well as current balancing between parallel MOSFETs.
DC Motor Control Predictive Models
Directory of Open Access Journals (Sweden)
Ravinesh Singh
2006-01-01
Full Text Available DC motor speed and position controls are fundamental in vehicles in general and robotics in particular. This study presents a mathematical model for correlating the interactions of some DC motor control parameters such as duty cycle, terminal voltage, frequency and load on some responses such as output current, voltage and speed by means of response surface methodology. For this exercise, a five-level full factorial design was chosen for experimentation using a peripheral interface controller (PIC-based universal pulse width modulation (PWM H-Bridge motor controller built in-house. The significance of the mathematical model developed was ascertained using regression analysis method. The results obtained show that the mathematical models are useful not only for predicting optimum DC motor parameters for achieving the desired quality but for speed and position optimization. Using the optimal combination of these parameters is useful in minimizing the power consumption and realization of the optimal speed and invariably position control of DC motor operations.
Jian-ping Wen; Chuan-wei Zhang
2015-01-01
In order to improve energy utilization rate of battery-powered electric vehicle (EV) using brushless DC machine (BLDCM), the model of braking current generated by regenerative braking and control method are discussed. On the basis of the equivalent circuit of BLDCM during the generative braking period, the mathematic model of braking current is established. By using an extended state observer (ESO) to observe actual braking current and the unknown disturbances of regenerative braking system, ...
Design and analysis of a new multiphase polygonal-winding permanent-magnet brushless dc machine
Wang, Y.; Chau, KT; Gan, J.; Chan, CC; Jiang, JZ
2002-01-01
In this paper, a new multiphase polygonal-winding permanent-magnet brushless dc (PMBDC) machine is proposed anal analyzed. The originality of the proposed machine lies on the multiphase polygonal-winding stator anal the surface-inset permanent-magnet rotor. Because of its unique structure and operating principle, a circuit-field-torque coupled time stepping finite-element method is also employed for analysis. The designed machine is prototyped and the analysis is verified by experimentation.
Simultaneous Sensing cum Actuating DC Motor
Daraeepour, Ali; Karimi Varkani, Ali
2013-01-01
This work aims to develop a new measurement method to monitor the speed, velocity, and mechanical impedance of a DC motor platform without using conventional sensors. A back-drivable DC motor platform is developed which uses the motor as sensor cum actuator. The sensor cum actuator determines the mechanical impedance of the moving load. By calibrating the Transduction Matrix of the DC motor the angular velocity and torque load of the motor can be measured via measuring the motor's electrical ...
A flux-mnemonic permanent magnet brushless motor for electric vehicles
C. Yu; Chau, KT; Liu, X; Jiang, JZ
2008-01-01
In this paper, a new permanent magnet (PM) brushless motor is proposed for electric vehicles. The key is to incorporate the concept of memory motors, namely, the online tunable flux-mnemonic PMs, into the stator doubly fed doubly salient PM motor, hence achieving effective air-gap flux control. By further employing the outer-rotor and double-layer-stator topology, the proposed motor takes the definite advantages of compact structure, low armature reaction, and direct-drive capability. Increas...
Rizzo, Renato; Andrea DEL PIZZO; Ivan SPINA
2012-01-01
This paper deals with Permanent Magnet Brushless Motors. In particular is proposed a new set of control algorithm expressions that is realized taking into account resistive parameters of the motor, differently from simplified models of this type of motors where these parameters are usually neglected. The control is set up and an analysis of the performance is reported in the paper, where the validation of the new expressions is done with reference to a motor prototype particularly compact bec...
Chau, KT; Liu, C; Li, W; Yu, C.
2009-01-01
This paper proposes a new efficiency optimization approach for a new kind of permanent-magnet hybrid brushless (PMHB) machine. The key is to propose the self-searching control (SSC) for the PMHB machine in such a way that the input power at the given load and speed can be progressively minimized by tuning the dc field current. A loss analysis of the machine is given to justify the use of dc field current as the control parameter. Detailed experimental results confirm that the proposed approac...
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.
Design of a novel phase-decoupling permanent magnet brushless ac motor
Cui, W.; Chau, KT; Jiang, JZ; Fan, Y.
2005-01-01
This paper presents a phase-decoupling permanent magnet brushless ac motor which can offer better controllability, faster response, and smoother torque than its counterparts. The key is due to its different motor configuration and simple scalar control. The motor configuration is so unique that it inherently offers the features of phase decoupling, flux focusing, and flux shaping, hence achieving independent phase control, fast response, and smooth torque. The scalar control is fundamentally ...
Brushless Direct Current Motor Control Using Sensorless Single-signal Feedback
2006-01-01
This report is a study into the use of a novel Compound back Electromotive Force (CBEMF) method for driving brushless direct current (BLDC) motors. The study was conducted in an attempt to find a simpler drive-method that would allow fast motor rotation with less powerful microcontrollers. The results show this method to be viable, and that further study may be beneficial. CBEMF signal is a composite signal containing feedback information from all 3 motor phases. By utilizing the CBEMF p...
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.
Control of Separately Excited Dc Motor
ALIM Abdul; ABUBOKAR Talukdar
2011-01-01
Speed control of separately excited DC motor and performance analysis by software simulation has been done. The objective of this paper is to describe the principle of DC motor speed control using nonlinear combined control (armature voltage and field current) and proportional integral- derivative (PID) controller for DC motor drives. In the field control mode, the armature voltage is held constant and an adjustable voltage is applied to the field.Simulation models of separately excited DC mo...
Method and apparatus for sensorless operation of brushless permanent magnet motors
Sriram, Tillasthanam V.
1998-01-01
A sensorless method and apparatus for providing commutation timing signals for a brushless permanent magnet motor extracts the third harmonic back-emf of a three-phase stator winding and independently cyclically integrates the positive and negative half-cycles thereof and compares the results to a reference level associated with a desired commutation angle.
Directory of Open Access Journals (Sweden)
Jian-ping Wen
2015-01-01
Full Text Available In order to improve energy utilization rate of battery-powered electric vehicle (EV using brushless DC machine (BLDCM, the model of braking current generated by regenerative braking and control method are discussed. On the basis of the equivalent circuit of BLDCM during the generative braking period, the mathematic model of braking current is established. By using an extended state observer (ESO to observe actual braking current and the unknown disturbances of regenerative braking system, the autodisturbances rejection controller (ADRC for controlling the braking current is developed. Experimental results show that the proposed method gives better recovery efficiency and is robust to disturbances.
Reza Ilka; Seyyed Asghar Gholamian
2012-01-01
ABSTRACT: This paper develops a mathematical relationship for the purpose of designing and selecting the optimum dimensions of a brushless permanent magnet motor. The design is optimised by the use of artificial bee colony algorithm with the goal of maximizing the power density and efficiency of the motor. The required dimensions of the brushless motor are calculated based on the optimum power density and efficiency requirements. Finally, the predicted results of the optimisation are validate...
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...
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.)
Design of a novel phase-decoupling permanent magnet brushless ac motor
Cui, Wei; Chau, K. T.; Jiang, J. Z.; Fan, Ying
2005-05-01
This paper presents a phase-decoupling permanent magnet brushless ac motor which can offer better controllability, faster response, and smoother torque than its counterparts. The key is due to its different motor configuration and simple scalar control. The motor configuration is so unique that it inherently offers the features of phase decoupling, flux focusing, and flux shaping, hence achieving independent phase control, fast response, and smooth torque. The scalar control is fundamentally different from the complicated vector control. It can achieve direct torque control through independent control of the phase currents. The proposed motor is prototyped and experimentally verified.
Directory of Open Access Journals (Sweden)
Renato RIZZO
2012-08-01
Full Text Available This paper deals with Permanent Magnet Brushless Motors. In particular is proposed a new set of control algorithm expressions that is realized taking into account resistive parameters of the motor, differently from simplified models of this type of motors where these parameters are usually neglected. The control is set up and an analysis of the performance is reported in the paper, where the validation of the new expressions is done with reference to a motor prototype particularly compact because is foreseen for application on tram propulsion drives. The results are evidenced in the last part of the paper.
MODELING PENGATURAN KECEPATAN MOTOR DC DENGAN SIMULINK
IN Satya Kumara
2009-01-01
Motor arus searah (motor dc), khususnya tipe penguatan terpisah, memiliki karakteristik pengaturan kecepatan yang sangat baik, karena flux-producing dan torque-producing components currents dalam keadaan independen satu sama lain. Hal ini terjadi karena konstruksi fisik motor dc dimana komponen arus yang menghasilkan torsi dan komponen arus yang menghasilkan fluk sudah terdekopel secara alami. Dengan demikian pengaturan kecepatan motor bisa dilakukan dengan teknik pengaturan yang tidak rumit ...
"Long life" DC brush motor for use on the Mars surveyor program
Braun, David; Noon, Don
1998-01-01
DC brush motors have several qualities which make them very attractive for space flight applications. Their mechanical commutation is simple and lightweight, requiring no external sensing and control in order to function properly. They are extremely efficient in converting electrical energy into mechanical energy. Efficiencies over 80% are not uncommon, resulting in high power throughput to weight ratios. However, the inherent unreliability and short life of sliding electrical contacts, especially in vacuum, have driven previous programs to utilize complex brushless DC or the less efficient stepper motors. The Mars Surveyor Program (MSP'98) and the Shuttle Radar Topography Mission (SRTM) have developed a reliable "long life" brush type DC motor for operation in low temperature, low pressure CO2 and N2, utilizing silver-graphite brushes. The original intent was to utilize this same motor for SRTM's space operation, but the results thus far have been unsatisfactory in vacuum. This paper describes the design, test, and results of this development.
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...
Dual wound dc brush motor gearhead
Henson, Barrie W.
1986-01-01
The design requirements, the design, development tests and problems, the qualification and life test and the findings of the strip examination of a dual wound DC brushed motor gearhead are described. It is the only space qualified dual wound dc brushed motor gearhead in Europe.
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.
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.
Development of a Magnetic-Geared Permanent-Magnet Brushless Motor
Wang, L. L.; Shen, Jian-Xin; Luk, Patrick Chi-Kwong; Fei, Wei-Zhong; Wang, C-F.; Hao, He
2009-01-01
High-torque and low-speed electrical drives are often employed for applications where mechanical gearing cannot be accommodated. On the other hand, permanent-magnet (PM) gear has drawn significant attention from both academies and industries due to the conspicuous merits, such as reduced acoustic noise, maintenance free, improved reliability, precise peak torque transmission capability, and inherent overload protection. In this paper, a magnetic-geared PM brushless motor is presented. It is a...
MODELING PENGATURAN KECEPATAN MOTOR DC DENGAN SIMULINK
Directory of Open Access Journals (Sweden)
IN Satya Kumara
2009-06-01
Full Text Available Motor arus searah (motor dc, khususnya tipe penguatan terpisah, memiliki karakteristik pengaturan kecepatan yang sangat baik, karena flux-producing dan torque-producing components currents dalam keadaan independen satu sama lain. Hal ini terjadi karena konstruksi fisik motor dc dimana komponen arus yang menghasilkan torsi dan komponen arus yang menghasilkan fluk sudah terdekopel secara alami. Dengan demikian pengaturan kecepatan motor bisa dilakukan dengan teknik pengaturan yang tidak rumit dan tidak memerlukan perangkat keras mahal. Pengaturan kecepatan motor dc bisa dilakukan dengan pengaturan arus jangkar atau arus medan secara bebas dan/atau simultan. Pemilihan variabel kontrol ini tergantung dari daerah operasi dari drive.Untuk pengaturan kecepatan dari diam sampai dengan kecepatan nominal dilakukan dengan pengaturan arusjangkar dimana arus medan dijaga konstan. Sedangkan untuk pengaturan kecepatan di atas kecepatan nominal dilakukan dengan memperkecil arus medan (field weakening. Dalam paper ini akan dibahas modeling pengaturan motor dc penguatan terpisah yang disimulasikan dengan Matlab Simulink.
Pohlmann, André; Hameyer, Kay
2012-01-01
Ventricular Assist Devices (VADs) are mechanical blood pumps that support the human heart in order to maintain a sufficient perfusion of the human body and its organs. During VAD operation blood damage caused by hemolysis, thrombogenecity and denaturation has to be avoided. One key parameter causing the blood's denaturation is its temperature which must not exceed 42 °C. As a temperature rise can be directly linked to the losses occuring in the drive system, this paper introduces an efficiency prediction chain for Brushless DC (BLDC) drives which are applied in various VAD systems. The presented chain is applied to various core materials and operation ranges, providing a general overview on the loss dependencies. PMID:23367198
FEM Analysis of Brushless DC Servomotor with Fractional Number of Slots per Pole
Directory of Open Access Journals (Sweden)
BALUTA, G.
2014-02-01
Full Text Available The authors present in this paper the analysis with Finite Element Method (FEM of the magnetic circuit for a Brushless DC servomotor with fractional number of slots/pole (9 slots and 10 poles. For this purpose, FEMM 4.2 software package was used for the analysis. To obtain the waveforms of Back-ElectroMotive Forces (BEMFs, electromagnetic and cogging torque for servomotor a program in LUA scripting language (integrated into interactive shell of FEMM4.2 has been created. A comparation with a structure with integer number of slots/pole (18 slots and 6 poles was also realized. The analysis results prove that the structure chosen is an optimal solution: sinusoidal waveforms of BEMFs, improved electromagnetic torque and reduced cogging torque. Therefore, the operating characteristics of the servomotor with 9/10 slots/poles manufactured by Sistem Euroteh Company and included in an integrated electrical drives system are presented in this paper.
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
The Interface communicate to DC motor control
Retuerta Cornet, Iu
2010-01-01
Mälardalens University makes internationally recognized research in the field of Robotics. This technological work shows an electrical engine control developed at Mälardalens University. The target of this project is to make an interface able to communicate with a platform/robot to move the platform/robot using an electric engine control in ADA language. There are different kinds of electric engines, AC, DC, stepper motor, etc. This control focuses on DC electric motors beca...
DC Motor Drive with PFC Rectifier
Lascu Mihaela; Lascu Dan; Popovici Adrian; Popescu Viorel; Băbăiţă Mircea; Negoiţescu Dan
2008-01-01
The goal of this work is to study theperformances of a hybrid controller used to controlDC Motor drive with a single-phase power factorcorrection rectifier. This study is made usingcomputer simulation (Simulink). The first part isdevoted to the control system of the DC Motors. Inthe second part, the design of the hybrid controllerwill be presented. The third part is the design ofthe fast response single-phase boost power factorcorrection rectifier. The last parts are devoted tosimulation and ...
Sitompul, Fuad Rahim
2015-01-01
Motor listrik merupakan perangkat elekromagnetis yang mengubah energi listrik menjadi energi mekanik. Motor DC memerlukan tegangan searah pada kumparan medan untuk diubah menjadi energi mekanik. Energi mekanik ini digunakan sebagai penggerak peralatan listrik seperti pompa,penggerak kipas angin, lift dan lain-lain. Karena penggunaannya yang cukup luas maka kinerjanya harus baik. Kinerja suatu motor DC dikatakan baik jika efisiensi motor tersebut tinggi. Hal itu dapat dicapai dengan mengatur b...
Computerized Torque Control for Large dc Motors
Willett, Richard M.; Carroll, Michael J.; Geiger, Ronald V.
1987-01-01
Speed and torque ranges in generator mode extended. System of shunt resistors, electronic switches, and pulse-width modulation controls torque exerted by large, three-phase, electronically commutated dc motor. Particularly useful for motor operating in generator mode because it extends operating range to low torque and high speed.
Gravity Compensation Technique Uses Small dc Motor
Hollow, Richard
1988-01-01
Small dc servomotor powered by simple constant-current source and with suitable gearing used to cancel effect of gravity upon load. Lead-screw positioning system has load counterbalanced by small supplementary motor powered by constant current source. Motor lighter and more compact alternative to counterbalance. Used in variety of mechanical systems where load positioned or accelerated in vertical plane.
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.
A Novel Current Sensor Technique for Brushless DC Motor Drives
Institute of Scientific and Technical Information of China (English)
无
2000-01-01
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔｔｈｅｔｏｒｑｕｅｄｅｖｅｌｏｐｅｄｂｙａｐｅｒｍａｎｅｎｔｍａｇｎｅｔｂｒｕｓｈｌｅｓｓｄｃｍｏｔｏｒｉｓｐｒｏｐｏｒｔｉｏｎａｌｔｏｔｈｅｍａｇｎｉｔｕｄｅｏｆｍｏｔｏｒｐｈａｓｅｃｕｒｒｅｎｔｓ.ＴｈｉｓｌｉｎｅａｒｒｅｌａｔｉｏｎｓｈｉｐｍａｋｅｓｉｔｃｏｎｖｅｎｉｅｎｔｔｏｃｏｎｔｒｏｌＢＬＤＣＭｔｏｒｑｕｅｐｒｏｄｕｃｔｉｏｎｂｙｒｅｇｕｌａｔｉｎｇｔｈｅｍｏｔｏｒｐｈａｓｅｃｕｒｒｅｎｔｓ[1].Ｉｎｔｈｉｓｐａｐｅｒ,ｔｈｅｉｎｓｔａｎｔａｎｅｏｕｓｔｏｒｑｕｅｒｅｆｅｒｓｔｏｔｈｅｒｅａｌｔｏｒｑｕｅｐｒｏｄｕｃｅｄａｔａｎｙｔｉｍｅｉｎｓｔａｎｔ,ｗｈｅｒｅａｓｔｈｅｓｔａｔｉｃｔｏｒｑｕｅｒｅｆｅｒｓｔｏｔｈｅｔｏｒｑｕｅｐｒｏｄｕｃｅｄｗｈｅｎｏｎｌｙｔｗｏｏｆｔｈｅｔｈｒｅｅｐｈａｓｅｗｉｎｄｉｎｇｓｃａｒｒｙｃｕｒｒｅｎｔｓ[2,3]. Ｉｎｓｔａｎｔａｎｅｏｕｓｔｏｒｑｕｅｃｏｎｔｒｏｌｓｔｒａｔｅｇｉｅｓａｒｅｕｓｕａｌｌｙｉｍｐｌｅｍｅｎｔｅｄｏｎｓｕｃｈｓｅｒｖｏａｐｐｌｉｃａｔｉｏｎｓｔｈａｔａｒｅｅｘｐｅｃ...
Circuit Regulates Speed Of dc Motor
Weaver, Charles; Padden, Robin; Brown, Floyd A., Jr.
1990-01-01
Driving circuit regulates speed of small dc permanent-magnet motor in tape recorder. Two nested feedback loops maintain speed within 1 percent of constant value. Inner loop provides coarse regulation, while outer loop removes most of variation in speed that remains in the presence of regulation by the inner loop. Compares speed of motor with commanded speed and adjusts current supplied to motor accordingly.
Three phase full wave dc motor decoder
Studer, P. A. (Inventor)
1977-01-01
A three phase decoder for dc motors is disclosed which employs an extremely simple six transistor circuit to derive six properly phased output signals for fullwave operation of dc motors. Six decoding transistors are coupled at their base-emitter junctions across a resistor network arranged in a delta configuration. Each point of the delta configuration is coupled to one of three position sensors which sense the rotational position of the motor. A second embodiment of the invention is disclosed in which photo-optical isolators are used in place of the decoding transistors.
Tooth shape optimization of brushless permanent magnet motors for reducing torque ripples
International Nuclear Information System (INIS)
This paper presents a tooth shape optimization method based on a generic algorithm to reduce the torque ripple of brushless permanent magnet motors under two different magnetization directions. The analysis of this design method mainly focuses on magnetic saturation and cogging torque and the computation of the optimization process is based on an equivalent magnetic network circuit. The simulation results, obtained from the finite element analysis, are used to confirm the accuracy and performance. Finite element analysis results from different tooth shapes are compared to show the effectiveness of the proposed method
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.
Directory of Open Access Journals (Sweden)
Bo Long
2013-12-01
Full Text Available Regenerative braking provides an effective way of extending the driving range of battery powered electric vehicles (EVs. This paper analyzes the equivalent power circuit and operation principles of an EV using regenerative braking control technology. During the braking period, the switching sequence of the power converter is controlled to inverse the output torque of the three-phase brushless direct-current (DC motor, so that the braking energy can be returned to the battery. Compared with the presented methods, this technology can achieve several goals: energy recovery, electric braking, ultra-quiet braking and extending the driving range. Merits and drawbacks of different braking control strategy are further elaborated. State-space model of the EVs under energy-regenerative braking operation is established, considering that parameter variations are unavoidable due to temperature change, measured error, un-modeled dynamics, external disturbance and time-varying system parameters, a sliding mode robust controller (SMRC is designed and implemented. Phase current and DC-link voltage are selected as the state variables, respectively. The corresponding control law is also provided. The proposed control scheme is compared with a conventional proportional-integral (PI controller. A laboratory EV for experiment is setup to verify the proposed scheme. Experimental results show that the drive range of EVs can be improved about 17% using the proposed controller with energy-regeneration control.
Sistem Kendali Kecepatan Motor DC Dengan Menggunakan Mikrokontroler
Ompusunggu, Chandra Putra
2012-01-01
Motor DC merupakan alat pengubah energi listrik menjadi energi gerak yang dicatu oleh tegangan DC. Kecepatan putaran dapat diatur dengan mengubah nilai tegangan atau arus yang masuk ke motor. Salah satu cara pengaturan kecepatan pada motor DC yaitu dengan menggunakan DC-DC konverter atau sering disebut dengan chopper. Chopper adalah suatu alat yang berfungsi untuk mengubah tegangan DC tetap menjadi tegangan DC yang bervariasi. Tegangan keluaran chopper dapat lebih besar atau lebih kecil dari ...
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...
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。
Halbach array DC motor/generator
Energy Technology Data Exchange (ETDEWEB)
Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)
1998-01-01
A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.
Halbach array DC motor/generator
Energy Technology Data Exchange (ETDEWEB)
Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.
1998-01-06
A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An ``inside-out`` design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then ``switched`` or ``commutated`` to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives. 17 figs.
Nasution, Abdul Rachman Hakim
2011-01-01
Motor arus searah merupakan salah satu motor listrik yang sering digunakan oleh industri – industri yang membutuhkan hasil kerja yang konstan. Hal tersebut dikarenakan motor arus searah menggunakan sumber tegangan DC sebagai sumber tegangan nya.Dan untuk kebutuhan yang semakin lama semakin kompleks yaitu kebutuhan yang menginginkan adanya variasi dari kecepatan motor arus searah maka ada beberapa metode yang bisa digunakan dan salah satunya adalah pengaturan kecepatan motor ...
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.
DC Motor Drive with PFC Rectifier
Directory of Open Access Journals (Sweden)
Lascu Mihaela
2008-05-01
Full Text Available The goal of this work is to study theperformances of a hybrid controller used to controlDC Motor drive with a single-phase power factorcorrection rectifier. This study is made usingcomputer simulation (Simulink. The first part isdevoted to the control system of the DC Motors. Inthe second part, the design of the hybrid controllerwill be presented. The third part is the design ofthe fast response single-phase boost power factorcorrection rectifier. The last parts are devoted tosimulation and experimental results.
Cascade Speed Control Of Dc Motor
Anagha, Ranjith K; Anand C.P; Rahul Das; Anusha A.S
2014-01-01
Abstract: This paper presents a MATLAB aided Cascade designed controller to control and monitor the DC motor speed. First, design the driver circuit of the DC motor and use the microcontroller PIC16F877A to collect the feedback signals from the current sensor and optical encoder. The measured speed and current are serially transmitted to PC using RS232. By the MATLAB aided cascade controller, where inner loop is the current loop and outer loop is the speed loop, the parameters are adjusted to...
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.
DEFF Research Database (Denmark)
Zhang, Xiaoxu; Liu, Xiao; Chen, Zhe
2015-01-01
This paper presents a rapid approach to compute the magnetic field distribution in a flux-modulated permanent-magnet brushless motor. Partial differential equations are used to describe the magnet field behavior in terms of magnetic vector potentials. The whole computational domain is divided...... magnetic field with those calculated by finite element method....
Remote PID control of a DC Motor
Silva, V.; Carvalho, V.; R. M. Vasconcelos; Soares, F.
2007-01-01
This paper presents a remote experiment for controlling a DC motor. This work was part of a final year graduation project of the Industrial Electronics Course at the University of Minho. It was implemented by an undergraduate student for student use. The experiment is controlled using a PID algorithm programmed in LabView environment. The remote user can test PID digital algorithms and parameters, change reference velocity values and register the motor output velocity profile.
Remote PID Control of a DC Motor
Directory of Open Access Journals (Sweden)
V. Silva
2007-08-01
Full Text Available This paper presents a remote experiment forcontrolling a DC motor. This work was part of a final yeargraduation project of the Industrial Electronics Course atthe University of Minho. It was implemented by anundergraduate student for students use. The experiment iscontrolled using a PID algorithm programmed in LabViewenvironment. The remote user can test PID digitalalgorithms and parameters, change reference velocity valuesand register the motor output velocity profile.
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.
Iron loss analysis in linear dc motor
Energy Technology Data Exchange (ETDEWEB)
Hippner, M.; Yamada, H.; Mizuno, T.
1999-09-01
The paper presents analysis of iron loss in a linear dc motor with a solid iron core. The analysis is based on a finite element magnetic field solution. The influence of magnetic bias on the iron loss is discussed. The results of the iron loss calculations are verified experimentally.
DC Motor Power Supply for Electric Kart
Vītols, K; Reinberg, N.; Galkins, I
2010-01-01
The aim of this paper is to provide thumb rules for developing power supply for an electric kart with a DC motor. Article includes consideration of battery system and designing process of power converter. A battery selection flowchart is introduced. Converter operation in buck mode is tested and evaluated. Needed improvements are discussed
Speed Control of Bldc Motor Drive By Using Pid Controllers
Y.Narendra Kumar,; P.Eswara Rao
2014-01-01
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 ...
Directory of Open Access Journals (Sweden)
Reza Ilka
2012-04-01
Full Text Available ABSTRACT: This paper develops a mathematical relationship for the purpose of designing and selecting the optimum dimensions of a brushless permanent magnet motor. The design is optimised by the use of artificial bee colony algorithm with the goal of maximizing the power density and efficiency of the motor. The required dimensions of the brushless motor are calculated based on the optimum power density and efficiency requirements. Finally, the predicted results of the optimisation are validated using a 2-D numerical program based on finite element analysis.ABSTRAK: Kajian ini mencadangkan persamaan yang menghubungkan rekabentuk dan dimensi magnet motor kekal tanpa berus. Rekabentuk optima berdasarkan algorisma koloni lebah tiruan dengan tujuan meningkatkan ketumpatan kuasa dan keberkesanan dibentangkan dalam kajian ini. Dimensi magnet motor kekal tanpa berus dihitung dengan ketumpatan kuasa optima dan keberkesanan. Akhirnya, keputusan telah disahkan dengan menggunakan program berangka 2-D berdasarkan analisis elemen finit.KEYWORDS: brushless; permanent magnet motor; power density; artificial bee colony; algorithm; finite element analysis
Sizing of a Right BLDC Motor for CNC Feed Drive
P.Ram Kishore Kumar Reddy,; Mr. P.Nagasekhara Reddy,; M.Ramchandra Rao,; Professor, Department of Electrical and Electronics Engineering, KL University, Guntur-520002, Andhra Pradesh, India.
2013-01-01
This paper provides a technical aspects and design factors for selection of a right Brushless Direct Current (BLDC) motor for a CNC feed drive.To meet the most demanding requirements of CNC machine tools, robots and transfer lines in terms of productivity, accuracy and dynamic performance, brushless DC drives are very widely used. These drives employ brushless torque motors which are of high torque, low speed direct drive type. The performance and reliability of BLDC motor drivers have been i...
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.
Neuro-Genetic Adaptive Optimal Controller for DC Motor
Mahmoud Mohamed Elkholy; Mohammed Abd Elhameed Abd Elnaiem
2014-01-01
Conventional speed controllers of DC motors suffer from being not adaptive, this is because of the nonlinearity in the motor model due to saturation. Structure of DC motor speed controller should vary according to its operating conditions, so that the transient performance is acceptable. In this paper an adaptive and optimal Neuro-Genetic controller is used to control a DC motor speed. GA will be used first to obtain the optimal controller parameter for each load torque and motor refer...
SMALL-SIGNAL ANALYZING OF SEPARATELY EXCITED DC MOTOR FED DC - DC CHOPPER
İSMAİL COŞKUN
1999-01-01
Choppers are widely used in order to get smooth speed characteristics of DC motors. If the load or input voltage is changed, a feedback control technique is used to get the constant speed. To design the proper feedback control, the transfer function of the chopper-motor combination should be kno\\vn. ln this study, the effort was given to obtain the general black diagram, inciurling the field current and aı1na ture current of chopper-fed DC motor. It can be seen from the black diagram that the...
Projective DC Motor Control Under Disturbance Torques
Zuglem, Ismael; Doruk, Resat Ozgur
2016-01-01
In this study, we will present the design of a linear DC motor controller by projective linear qudratic servo feedback (P-LQSF) and analyze its stability through the notion of input to state stability theory. The projective control approach allows one to design an output feedback controller which approximates the eigenspectrum of a full state feedback closed loop. The performance and stability of the controllers will be analyzed both theoretically and through simulation. Apart from basic line...
Implementing two DC motor speed control strategies
Directory of Open Access Journals (Sweden)
José Danilo Rairán Antolines
2010-05-01
Full Text Available While linear control techniques for dynamic systems have been widely tested, systems are not linear in practice. This means that controllers must be re-tuned to make them useful in an experimental setup. This article presents the tuning and re-tuning process for two control strategies: a PID and an algorithm based on the choice of overall transfer function controlling a DC permanent magnet motor. The algorithms’ performance is evaluated and some recommendations are made.
Sensorless control of a DC series motor
Amet, Leonardo; Ghanes, Malek; Barbot, Jean-Pierre
2013-01-01
In this paper a sensorless speed control for a DC series motor is presented. In this context, an observability analysis is performed, revealing that the system is inobservable at zero current. In order to overcome this problem we propose the joint use of an estimator and an observer, the latter being based on second order sliding modes techniques. The simulation results highlight the good performance of the proposed control.
Speed Control of Separately Excited DC Motor
Moleykutty George
2008-01-01
This paper proposes the speed control of a separately excited dc motor (SEDM) by varying armature voltage. The novelty of this paper lies in the application of nonlinear autoregressive-moving average (NARMA)L2 controller for the speed control of SEDM. This paper also discusses speed control of a SEDM using chopper circuit. The performance of the proposed system has been compared with the traditional one using conventional controllers. The entire system has been modeled using MATLAB 7.0 toolbo...
Implementing two DC motor speed control strategies
José Danilo Rairán Antolines; Yeni Paola Sierra Niño; Néstor Iván Moreno Roballo
2010-01-01
While linear control techniques for dynamic systems have been widely tested, systems are not linear in practice. This means that controllers must be re-tuned to make them useful in an experimental setup. This article presents the tuning and re-tuning process for two control strategies: a PID and an algorithm based on the choice of overall transfer function controlling a DC permanent magnet motor. The algorithms’ performance is evaluated and some recommendations are made.
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 ...
A new technique to control brushless motor for blood pump application.
Fonseca, Jeison; Andrade, Aron; Nicolosi, Denys E C; Biscegli, José F; Legendre, Daniel; Bock, Eduardo; Lucchi, Júlio César
2008-04-01
This article presents a back-electromotive force (BEMF)-based technique of detection for sensorless brushless direct current motor (BLDCM) drivers. The BLDCM has been chosen as the energy converter in rotary or pulsatile blood pumps that use electrical motors for pumping. However, in order to operate properly, the BLDCM driver needs to know the shaft position. Usually, that information is obtained through a set of Hall sensors assembled close to the rotor and connected to the electronic controller by wires. Sometimes, a large distance between the motor and controller makes the system susceptible to interference on the sensor signal because of winding current switching. Thus, the goal of the sensorless technique presented in this study is to avoid this problem. First, the operation of BLDCM was evaluated on the electronic simulator PSpice. Then, a BEMF detector circuitry was assembled in our laboratories. For the tests, a sensor-dependent system was assembled where the direct comparison between the Hall sensors signals and the detected signals was performed. The obtained results showed that the output sensorless detector signals are very similar to the Hall signals at speeds of more than 2500 rpm. Therefore, the sensorless technique is recommended as a responsible or redundant system to be used in rotary blood pumps. PMID:18370953
Operation of a test bed axial-gap brushless DC rotor with a superconducting stator
International Nuclear Information System (INIS)
A variable-speed axial-gap motor with a stator consisting of four liquid helium cooled superconducting electromagnets (two pole pairs) was built and proof tested up to 608 rpm in November 1990 as a tool for joint industry-laboratory evaluation of coils fabricated from high-temperature oxide superconductors. A second rotor was fabricated with improved material, winding configuration, and wire type, and the drive system was modified to eliminate current spiking. The modified motor was characterized to design speed, 188 rad/s (1800 rpm), to acquire a performance baseline for future comparison with that of high-temperature superconducting (HTS) wire. As it becomes commercially available, HTS wire will replace the low-temperature electromagnet wire in a stator modified to control wire temperatures between 4 K and 77 K. Measurements of the superconducting electromagnetic field and locked rotor torque as functions of cryocurrent and dc current through two phases of the rotor, respectively, provided data to estimate power that could be developed by the rotor. Back emf and parasitic mechanical and electromagnetic drag torques were measured as functions of angular velocity to calculate actual rotor power developed and to quantify losses, which reduce the motor's efficiency. A detailed measurement of motor power at design speed confirmed the developed power equation. When subsequently operated at the 33-A maximum available rotor current, the motor delivered 15.3 kW (20.5 hp) to the load. In a final test, the cryostat was operated at 2500 A, 200 A below its critical current. At rotor design current of 60 A and 2500 A stator current, the extrapolated developed power would be 44.2 kW (59.2 hp) with 94% efficiency
International Nuclear Information System (INIS)
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
Luo, Shaohua; Wu, Songli; Gao, Ruizhen
2015-07-01
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. PMID:26232953
Luo, Shaohua; Wu, Songli; Gao, Ruizhen
2015-07-01
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.
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...
Development of a control system for DC-motor
Siewert, Marcus
2010-01-01
A control system for a BLDC (Brushless Direct Current) motor has been developed in Labview 2009. This report explains how it works, conclusions and some information about things that could have been done differently. This report is also a good introduction to Labview including its advantages and disadvantages. It also explains how a FOC (Field Oriented Control) works. This is the public version of the report which does not include any results or information about the implementation. This info...
Chan, CC; Jiang, JZ; Xia, W; Chau, KT; Zhu, ML
1996-01-01
In this paper, a control approach to optimize the system efficiency of phase-decoupling (PD) permanent-magnet (PM) brushless motor drives during constant-power operation is presented. The approach is to adaptively adjust the advanced conduction angle to minimize the total system losses for a given operation point in the constant-power region. The corresponding minimum total losses are determined by minimizing the input current for a fixed voltage source. Both computer simulation and experimen...
Silva-Ortigoza, R.; C. Márquez-Sánchez; F. Carrizosa-Corral; M. Antonio-Cruz; J. M. Alba-Martínez; Saldaña-González, G.
2014-01-01
This paper presents a hierarchical controller that carries out the angular velocity trajectory tracking task for a DC motor driven by a DC/DC Buck converter. The high level control is related to the DC motor and the low level control is dedicated to the DC/DC Buck converter; both controls are designed via differential flatness. The high level control provides a desired voltage profile for the DC motor to achieve the tracking of a desired angular velocity trajectory. Then, a low level control ...
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...
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.
Speed Control of Separately Excited DC Motor
Directory of Open Access Journals (Sweden)
Moleykutty George
2008-01-01
Full Text Available This paper proposes the speed control of a separately excited dc motor (SEDM by varying armature voltage. The novelty of this paper lies in the application of nonlinear autoregressive-moving average (NARMAL2 controller for the speed control of SEDM. This paper also discusses speed control of a SEDM using chopper circuit. The performance of the proposed system has been compared with the traditional one using conventional controllers. The entire system has been modeled using MATLAB 7.0 toolbox. It has been found that both PI and hysteresis current controllers could be eliminated by the use of NARMA-L2 controller.
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.
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.
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.
Sensor-less pseudo-sinusoidal drive for a permanent-magnet brushless ac motor
Liu, Li-Hsiang; Chern, Tzuen-Lih; Pan, Ping-Lung; Huang, Tsung-Mou; Tsay, Der-Min; Kuang, Jao-Hwa
2012-04-01
The precise rotor-position information is required for a permanent-magnet brushless ac motor (BLACM) drive. In the conventional sinusoidal drive method, either an encoder or a resolver is usually employed. For position sensor-less vector control schemes, the rotor flux estimation and torque components are obtained by complicated coordinate transformations. These computational intensive methods are susceptible to current distortions and parameter variations. To simplify the method complexity, this work presents a sensor-less pseudo-sinusoidal drive scheme with speed control for a three-phase BLACM. Based on the sinusoidal drive scheme, a floating period of each phase current is inserted for back electromotive force detection. The zero-crossing point is determined directly by the proposed scheme, and the rotor magnetic position and rotor speed can be estimated simultaneously. Several experiments for various active angle periods are undertaken. Furthermore, a current feedback control is included to minimize and compensate the torque fluctuation. The experimental results show that the proposed method has a competitive performance compared with the conventional drive manners for BLACM. The proposed scheme is straightforward, bringing the benefits of sensor-less drive and negating the need for coordinate transformations in the operating process.
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。
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。
Voice-Based Control of a DC Servo Motor
Musaab Hassan; Hammam Mahjoub; Mohammed Obed
2012-01-01
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...
Summary of electric vehicle dc motor-controller tests
Mcbrien, E. F.; Tryon, H. B.
1982-01-01
The differences in the performance of dc motors are evaluated when operating with chopper type controllers, and when operating on direct current. The interactions between the motor and the controller which cause these differences are investigated. Motor-controlled tests provided some of the data the quantified motor efficiency variations for both ripple free and chopper modes of operation.
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.)
Artificial Intelligent Controller for a DC Motor
Delavari, Hadi; Ranjbar Noiey, Abolzafl; Minagar, Sara
The Speed and position control of DC motors is addressed in this paper. An optimal intelligent control scheme is proposed for the system. Preliminary a PID controller is designed using Genetic Algorithms (GA). The proposed controller is implemented by using optimal integral state feedback control with GA and Kalman filter. In the proposed scheme, performance depends on choosing weighting matrices Q and R in the cost function, and accordingly GA is used to find these proper weighting matrices. In order to reduce the control performance degradation due to system parameters variation, a Kalman filter is gained. The performance of the proposed technique (ISF) is compared with PID controller. Computer simulation validates the effectiveness of the proposed scheme even in presence of uncertainties.
Speed Control of DC Motor using AC/AC/DC Converter Based on Intelligent Techniques
Rakan Kh Antar
2013-01-01
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 fo...
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.
International Nuclear Information System (INIS)
Highlights: ► We used response surface methodology (RSM) for optimization of PI parameters. ► When we reviewed the literature, we observed that RSM is not used for this purpose. ► The originality of this work is that applying RSM to the electrical machine drives. ► RSM provided the mathematical relationships between M0, Ts, and process parameters Kp, Ki. ► We determined the optimal combinations of input parameters with only 13 experiments. - Abstract: This paper proposes response surface methodology (RSM) for tuning Proportional Integral (PI) coefficients for a Permanent Magnet Brushless Direct Current (PMBLDC) motor drive. Overshoot and settling time data are obtained from the application circuit for different Kp–Ki pairs. RSM is a union of statistical and mathematical techniques necessary for developing, improving, and optimizing processes. Therefore, optimal values of PI controller coefficients are obtained using RSM. Motion Control Kit (MCK243) is used to carry out digital motion control applications. The MCK243 kit includes a power module and a three phase brushless motor. TMS320F243 programs for PMBLDC motor speed control. Experimental results are given to show the validity of this method.
Bidirectional soft-switching converter-fed DC motor drives
Ching, TW; Chan, CC; Chau, KT
1998-01-01
Two new soft-switching DC-DC power converters, with the capabilities of bidirectional power flow and soft-switching (either zero-voltage transition or zero-current transition) are developed for DC motor drives. The proposed bidirectional zero-voltage-transition power converter possesses the definite advantages that both main transistors and rectifiers can switch with zero-voltage switching (ZVS) and unity device stresses during both motoring and regenerating modes of operation, while both the...
Induction Motor Control through AC/DC/AC Converters
Elfadili, Abderrahim; Giri, Fouad; Ouadi, Hamid; El Magri, Abdelmounime; Dugard, Luc; Abouloifa, Abdelmajid
2010-01-01
We consider the problem of controlling inductions motors driven through AC/DC rectifiers and DC/AC inverters. The control objectives are threefold: (i) forcing the motor speed to track a reference signal, (ii) regulating the DC Link voltage, (iii) assuring a satisfactory power factor correction (PFC) with respect to the power supply net. First, a nonlinear model of the whole controlled system is developed in the Park-coordinates. Then, a nonlinear multi-loop controller is synthesized using th...
SMALL-SIGNAL ANALYZING OF SEPARATELY EXCITED DC MOTOR FED DC - DC CHOPPER
İsmail COŞKUN
1999-01-01
Choppers are widely used in order to get smooth speed characteristics of DC motors. If the load or input voltage is changed, a feedback control technique is used to get the constant speed. To design the proper feedback control, the transfer function of the chopper-motor combination should be kno\\vn. ln this study, the effort was given to obtain the general black diagram, inciurling the field current and aı1na ture current of chopper-fed DC motor. It can be seen from the black diagram that th...
Dr. Mehrdad Jafarboland; Farid Salehi Nia; Ehsan Moosavi; Jafarshishehgar; Ali Asghar Yarali Darani
2014-01-01
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 r...
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."
SPEED CONTROL OF DC MOTOR WITH PIC 16F877
ÇOLAK, İlhami; Ramazan BAYINDIR
2005-01-01
In this study, a PI controlled separately excited direct current (DC) motor speed has been controlled using PIC 16F877 controller. In the PIC 16F877 programming as a PI controller, the speed of the motor is expected to follow the reference speed. Speed of the motor is measured by a tacho generator and then, the voltage applied to the motor is adjusted by a semiconductor power switch using pulse width modulation (PWM) technique. Drive circuit was tested with 0.9 kW DC motor. Experimental resul...
SPEED CONTROL OF DC MOTOR WITH PIC 16F877
Directory of Open Access Journals (Sweden)
İlhami ÇOLAK
2005-02-01
Full Text Available In this study, a PI controlled separately excited direct current (DC motor speed has been controlled using PIC 16F877 controller. In the PIC 16F877 programming as a PI controller, the speed of the motor is expected to follow the reference speed. Speed of the motor is measured by a tacho generator and then, the voltage applied to the motor is adjusted by a semiconductor power switch using pulse width modulation (PWM technique. Drive circuit was tested with 0.9 kW DC motor. Experimental results show that the drive circuit developed is very simple, useful, sensible, economical and flexible to apply for different applications.
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
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.
A SPICE compatible model of permanent magnet DC motor drives
Chan, CC; Chau, KT
1995-01-01
A SPICE compatible model for the computer simulation of permanent magnet (PM) DC motor drives is presented. The key of the proposed model is to take into account the armature reaction and magnet demagnetization, hence the shift of operating point at load conditions can be considered. Making use of this model, the PSpice simulation of a typical PM DC motor drive is performed. Apart from the steady-state simulation, transient behaviours of the PM DC motor drive, including start-up, sudden load ...
Fractional order control of a DC motor with load changes
Copot, Cosmin; Muresan, Cristina; Ionescu, Clara-Mihaela; De Keyser, Robain
2014-01-01
This paper investigates the robustness of a fractional-order controller against the load changes of a DC motor. The gains and time constants of the DC motor are modified by means of a change in the brake. Two different setups of a DC motor, one with 25% brake and the other with 50% brake are considered in the experimental evaluation. The closed-loop performances of the fractional-order controller are compared with integer-order controller using the same performance criteria and the same tunin...
STEP RESPONS MOTOR DC MENGGUNAKAN METODA SINYAL KOMPRESI
Directory of Open Access Journals (Sweden)
Satrio Dewanto
2015-12-01
Full Text Available Output signal in the form of a step response of a DC motor can be obtained by providing the input signal to the motor in the form of a signal step directly. Step response obtained in this way usually contains a lot of noise. To reduce noise, this research was designed with the aim to get the step response using signal compression method in which the input signal is not a step but a signal with a specific shape given to the motor and if the output signal of the motor is compressed, it will obtain impulse response. Step response of the DC motor can be obtained by doing the integral to the impulse response. Step response which is obtained using signal compression method will be used to estimate parameters model of DC motor to see the validity of this method. The result of this research shows that the estimated value of the parameters from the step response has value closer to the value of the parameters given to the model of a DC motor. The conclusion of this research is the method of signal compression can be used to obtain the step response of a DC motor model. Further research will be conducted on the actual motor instead of using a mathematical model.
Permanent Magnet DC Motor Control Using Image Processing
Directory of Open Access Journals (Sweden)
Rohan Chadha, Jai Prakash
2012-10-01
Full Text Available There are many application that have been developed based on motor control in electronic and electrical field such as automation, flexible manufacturing system and computer integrated manufacturing. Various DC motor control techniques are used such as chopper circuits for dc motor control, using power MOS devices in drives and switched mode controller for DC motors. Also there are various microcontroller based DC motor controllers available but it will result in limitations regarding remote control applications of robotics. This work deals with the direction and speed control of Permanent Magnet dc motor through image processing in Matlab. Motor will be controlled on the basis of image of hand captured by webcam. Image will be acquired and processed through Image processing Programming in Matlab. On the basis of movement of hand on both the sides the motor will rotate in both directions clock-wise and anti-clockwise along with its speed control. Among various microcontrollers Atmega 16 8 bit microcontroller is used due to its high performance, low power, advanced architecture and many more features. The goal of this work is to obtain a microcontroller based PMDC motor control through image processing programming in Matlab which will result in remote control of wide range of robotic applications.
DC Motor Parameter Identification Using Speed Step Responses
Wei Wu
2012-01-01
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 ...
Abdullah
2010-01-01
Had designed a control and measuring instrument who can measure rotation speed and temperature from a dc motor and also control temperature from a dc motor with use two fans who actived otomaticly for defend dc motor rotation speed stability. The sensor was used for detecting speed rotation in this research is Optocoupler sensor and the sensor was used for measuring and control dc motor temperatur is LM 35 sensor. And the main of control from all system is microcontroller type AT89S52. All ...
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.
International Nuclear Information System (INIS)
A microprocessor-based ultra-high speed brushless homopolar inductor motor drive system (HiDrive) with no gearing and using a high frequency IGBT inverter switching at 32 kHz is described and discussed in this paper. The homopolar motor features a solid steel rotor without magnets, windings, or laminations, which allows the motor to be operated at very high speed. The HiDrive system achieves 16,000 RPM, 45 Hp continuously. The drive system discussed in this paper can be used to replace conventional motors and speed increasing gear boxes in very high speed industrial applications such as centrifuges, compressors, blowers, pumps, and machine tool spindles. The HiDrive system discussed in this paper is used to drive a compressor for nuclear power application. In this paper, the detailed descriptions of the motor construction, equivalent circuit, operation and control principle are offered. The IGBT inverter drive system design and controls including motor speed sensing, load angle control, synchronization, brake control, power device switchings, and thermal issues are addressed. The simulation results various test results, and the typical application examples of the high speed drives are also presented in this paper
DC motor proportional control system for orthotic devices
Blaise, H. T.; Allen, J. R.
1972-01-01
Multi-channel proportional control system for operation of dc motors for use with externally-powered orthotic arm braces is described. Components of circuitry and principles of operation are described. Schematic diagram of control circuit is provided.
Diseño de control robusto de velocidad de motores brushless para robótica aérea
Cotte Corredor, Jorge Mario; Moreno Pineda, Andrés Felipe
2010-01-01
La meta en este trabajo de grado es aportar una base teórica sobre el funcionamiento de los motores brushless y los métodos de control existentes. También lo es contribuir con el desarrollo de las plataformas robóticas aéreas en la universidad y en el país, con la revisión del estado del arte de los cuatrirotores y sus aplicaciones más prometedoras. Finalmente, aportar a un sistema controlador de velocidad de los propulsores brushless para el proyecto del cuatrirotor de la universidad. Los ob...
CLOSED LOOP SPEED CONTROL OF DC MOTOR USING PWM
Mangesh J Nemade
2015-01-01
In This work reveals the digital closed loop control system for speed control of DC motor using PWM technique. In present days the power semiconductor devices have co mpletely revolutionized the control of drives especially in the area of control usage of thyristors IGBT’s power MOSFET etc., was increased. The digital circuit can be interfaced to microcontroller. So that the speed can be controlled by Microcontroller there by making speed control of DC motor even more easil...
Sensored and sensorless speed control methods for brushless doubly fed reluctance motors
Jovanovic, Milutin
2009-01-01
The study considers aspects of scalar V/f control, vector control and direct torque (and flux) control (DTC) of the brushless doubly fed reluctance machine (BDFRM) as a promising cost-effective alternative to the existing technological solutions for applications with restricted variable speed capability such as large pumps and wind turbine generators. Apart from providing a comprehensive literature review and analysis of these control methods, the development and results of experimental verif...
A.S. Oshaba; E.S. Ali
2013-01-01
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 co...
Photovoltaic-wind hybrid system for permanent magnet DC motor
Nasir, M. N. M.; Lada, M. Y.; Baharom, M. F.; Jaafar, H. I.; Ramani, A. N.; Sulaima, M. F.
2015-05-01
Hybrid system of Photovoltaic (PV) - Wind turbine (WT) generation has more advantages and reliable compared to PV or wind turbine system alone. The aim of this paper is to model and design hybrid system of PV-WT supplying 100W permanent-magnet dc motor. To achieve the objective, both of PV and WT are connected to converter in order to get the same source of DC supply. Then both sources were combined and straightly connected to 100W permanent magnet dc motor. All the works in this paper is only applied in circuit simulator by using Matlab Simulink. The output produced from each converter is expected to be suit to the motor specification. The output produced from each renewable energy system is as expected to be high as it can support the motor if one of them is breakdown
Parameters identification of a permanent magnet DC motor
Energy Technology Data Exchange (ETDEWEB)
Salah, M. [Univ. College of Applied Science, Gaza, Palestine (Israel); Abdelati, M. [Islamic Univ. of Gaza, Gaza, Palestine (Israel)
2010-03-09
Due to precise, wide, simple, and continuous control characteristics, direct current (DC) motors have been commonly employed in many industrial applications such as electric vehicles, steel rolling mills, electric cranes, and robotic manipulators. Because of their lower cost and ease of controller implementation, DC motors are preferred over alternating current (AC) motors. System identification of DC motors is of great importance in control problems. Accurate mathematical models and their parameters are necessary when designing controllers. This paper addressed driver circuits and parameters identification of a permanent magnet DC motor. An experimental measurement of armature voltage, armature current and rotor speed were performed using a data acquisition module in order to identify the parameters of the motor. DAQ toolbox and Simulink in MATLAB were used to obtain test signals and perform analysis based on the nonlinear least square method. The extracted motor parameters produced consistent simulation results with experimental data. It was concluded that the proposed approach is simple, fast and accurate. 16 refs., 4 tabs., 9 figs.
Control Of Stepper Motor Movement By DC Voltage
International Nuclear Information System (INIS)
Instrumentation for controlling the power of reactor of TRIGA Mark II uses the stepper motor to move the control rod of neutron absorbers. The direction and speed of control rod movement are determined by the polarity and the amplitude of DC voltage as an error signal that is the difference of set point of power and the power of being measured on the control system. The unit of stepper motor controller of reactor instrumentation of TRIGA Mark II uses patent module of trade Mark of Vexta, USA. In this chance, the electronic circuit is made to function as the control of stepper motor movement by using the DC voltage to anticipate the problem may be faced in case of repair and maintenance of reactor instrumentation. As a result of experiment, it is stated that the control of motor movement by using DC voltage is performed into 2 stages. First, by making the oscillator that is proportional to the positive DC voltage. Secondly, by making the translator to translate the oscillator signal to be a logic pattern for controlling the movement of stepper motor. Translator and motor driver are made by using the L297 and L298 as a pair of stepper motor controller of SGSTHOMSON
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.
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.
Advanced dc-Traction-Motor Control System
Vittone, O.
1985-01-01
Motor-control concept for battery-powered vehicles includes stateof-the-art power-transistor switching and separate excitation of motor windings in traction and regenerative braking. Switching transistors and other components of power-conditioning subsystem operate under control of computer that coordinates traction, braking, and protective functions.
A novel polyphase multipole square-wave permanent magnet motor drive for electric vehicles
Chan, CC; Jiang, JZ; Wang, XY; Chau, KT; Chen, GH
1994-01-01
A novel high-power-density permanent magnet (PM) motor drive for electric vehicles (EVs) is proposed. The motor is a polyphase multipole square-wave PM motor, which can be classified as a kind of PM brushless DC motor. The distinct features of the proposed motor as compared to those of the conventional PM brushless DC motor are as follows. First, the multipole magnetic circuit arrangement enables the minimization of the magnetic yoke, resulting in the reduction of motor volume and weight. Sec...
STATE SPACE MODELING AND SIMULATION OF SENSORLESS PERMANENT MAGNET BLDC MOTOR
N. Muruganantham; Dr. S. Palani
2010-01-01
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, differen...
STEP RESPONS MOTOR DC MENGGUNAKAN METODA SINYAL KOMPRESI
Satrio Dewanto
2015-01-01
Output signal in the form of a step response of a DC motor can be obtained by providing the input signal to the motor in the form of a signal step directly. Step response obtained in this way usually contains a lot of noise. To reduce noise, this research was designed with the aim to get the step response using signal compression method in which the input signal is not a step but a signal with a specific shape given to the motor and if the output signal of the motor is compressed, it will obt...
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.
A Neuro-controller for DC Motor Containing Nonlinear Friction
Energy Technology Data Exchange (ETDEWEB)
Jang, Jun Oh; Jeon, Gi Joon [Kyung Pook National University (Korea, Republic of)
1998-01-01
This paper represents the application of a neuro-controller for compensating the effects of the friction in a DC motor system. A bound on the tracking error is derived from the analysis of the tracking error dynamics. The proposed neuro-controller is a combination of a linear controller and a neural network, and is trained by indirect learning scheme. The proposed neuro-controller is implemented and tested on an IBM PC - based DC motor system. The ideas, algorithm, simulation, and experiment results are described. Experimental results are shown to be superior to those of conventional control in terms of friction compensation. (author). 17 refs., 11 figs.
Rapid Control Prototyping Plataform for Didactic Plant Motor DC
Cristian Bazán-Orobio; Juan F. Flórez-Marulanda
2013-01-01
In this paper a design, implementation and validation of a Rapid Control Prototype platform for a plant based on a DC motor is proposed. This low-cost prototype provides of an electronic card (with a motor DC and sensors) manipulated by PC with free software tools using Linux, Scilab / Scicos and RTAI-Lab. This RCP System allows developing speed -position control trainings by using different types of PID industrial controllers with anti – wind up and bump less transfer schemes. We develop a s...
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.
Li, Y; Zhu, Z.Q.; Howe, D.; Bingham, Chris
2007-01-01
An improved brushless AC motor model is proposed for use in signal-injection-based sensorless control schemes by accounting for cross-coupling magnetic saturation between the - and -axes. The incremental self- and mutual-inductance characteristics are obtained by both finite-element analysis and measurements, and have been successfully used to significantly reduce the error in the rotor position estimation of sensorless control.
Tuning PID controlling parameters for DC motor speed regulation
Stojanov, Done; Cveta MARTINOVSKA
2013-01-01
Modern robots are sophisticated and complex systems, composed of: sensors, high-speed processors and actuators. Different size DC electrical motors are used as actuators, converting electrical energy into mechanical movement. Without them, robots can’t perform movements, what is completely on the contrary on modern robotics concepts. Motor speed regulation is an important engineering task. Having appropriately tuned the controller, the desired speed is reached in a short time interval, with m...
Sensorless Passivity Based Control of a DC Motor
M.Seethamathavi; T.Vignesh
2015-01-01
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 t...
Axial field permanent magnet DC motor with powder iron armature
Sharkh, Suleiman M.A.; Mohammad, Mohammad T.
2007-01-01
The paper describes a double-gap axial field permanent magnet (PM) dc motor whose double-layer armature wave winding is constructed of copper strips. It investigates the performance of two machines using powder iron and lamination steel materials as armature teeth. Tests are conducted to evaluate the motor torque and speed curves as well as their efficiency under different loads. Finite element analysis (FEA) and equivalent circuit models are used to determine the levels of the magnetic satur...
Power quality measurements of a DC motor drive
Energy Technology Data Exchange (ETDEWEB)
Mulakken, N. [Chevron Texaco, Richmond, CA (United States); Taufik [California Poly State Univ., San Luis Obispo, CA (United States). Dept. of Electrical Engineering; Anwari, M. [Univ. Teknologi Malaysia, Johor (Malaysia). Faculty of Electrical Engineering
2008-07-01
The DC motor converts electrical energy into mechanical energy. This paper presented power quality measurements for a DC drive. A laboratory setup consisting of a 5 hp DC drive connected to a load resistor bank was established to conduct the measurements. The purpose was to determine how various loading conditions on DC drives affect efficiency, input power factor to the DC drive and total harmonic distortion of output armature current of a DC drive. In conducting these measurements, 3 different loading conditions were examined while the output (armature) voltage of the DC drive was increased from about 25 per cent to 100 per cent. Two results were observed. Efficiency increased as the armature voltage increased and total input power factor decreased as the armature voltage increased. The result of total harmonic distortion measurements done on the armature current agreed with the expectation due to the increasing DC component of the armature voltage waveform. Both utilities and consumers will find the data from these measurements useful in terms of power quality by knowing how various operating conditions of a DC drive affect the power quality differently at both its input and output. 6 refs., 5 figs.
Life Prediction of DC Motor using Time Series Analysis based on Accelerated Degradation Testing
Directory of Open Access Journals (Sweden)
Li Wang
2013-12-01
Full Text Available This study presents a method of life prediction for DC motor using time series modeling procedure based on DC motor accelerated degradation testing data. DC motor accelerated degradation data are treated as time series and stochastic process are utilized to describe the degradation process for life prediction. An accelerated degradation test is processed for DC motor until they failed and the accelerated degradation data are collected for life prediction. A comparison between the predicted lifetime and the real lifetime of DC motors is processed and the results show that the life prediction of DC motors using time series analysis is effective.
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.
Using a micromachined magnetostatic relay in commutating a DC motor
Tai, Yu-Chong (Inventor); Wright, John A. (Inventor); Lilienthal, Gerald (Inventor)
2004-01-01
A DC motor is commutated by rotating a magnetic rotor to induce a magnetic field in at least one magnetostatic relay in the motor. Each relay is activated in response to the magnetic field to deliver power to at least one corresponding winding connected to the relay. In some cases, each relay delivers power first through a corresponding primary winding and then through a corresponding secondary winding to a common node. Specific examples include a four-pole, three-phase motor in which each relay is activated four times during one rotation of the magnetic rotor.
Hardware Evolution of Analog Speed Controllers for a DC Motor
Gwaltney, David A.; Ferguson, Michael I.
2003-01-01
This viewgraph presentation provides information on the design of analog speed controllers for DC motors on aerospace systems. The presentation includes an overview of controller evolution, evolvable controller configuration, an emphasis on proportion integral (PI) controllers, schematic diagrams, and experimental results.
Pengendalian Kecepatan Putar Motor DC Sebagai Penggerak Alat Penghapus Whiteboard
Syam, Rafiuddin
2014-01-01
Menghapus whiteboard dengan cara manual memerlukan waktu yang dapat mengurangi keefisiensian waktu kegiatan belajar mengajar serta beresiko membuat tangan pengajar menjadi kotor. Untuk itu dibuat suatu alat mekanik yang dapat bekerja secara otomatis dan terprogram sehingga menggantikan tugas pengajar dalam menghapus tulisan di whiteboard. Pada penelitian ini alat penghapus whiteboard menggunakan dua buah motor DC dengan kapasitas 12 volt...
Pengendali Kecepatan Motor Dc Menggunakan Sensor Hall Berbasis Mikrokontroler ATMega 8535
Sinaga, Roni
2013-01-01
Has designed a DC motor speed control device using sensor hall based microcontroller ATMega8535. Generally, this instrument consists of a dc motor, hall sensor, microcontroller and driver. This instrument is used to control dc motor speed rotary by setting the pulse width modulation (PWM) which provided, to maintain the stability of the motor even though the motor disorder of load changes. In general, the workings of these instruments is microcontroller will compare the motor rotation speed t...
Perbandingan Pengereman Motor DC Penguatan Seri Dengan Metode Dinamik Dan Plugging
Riko Euler Sitinjak
2009-01-01
Motor adalah mesin yang mengubah energi listrik menjadi energi mekanis. Pada motor arus searah (motor DC) energi listrik arus searah diubah menjadi energi mekanis. Konstruksi motor DC sangat mirip dengan generator DC. Kenyataannya mesin yang bekerja baik sebagai generator akan bekerja baik pula sebagai motor. Pada prinsipnya motor sangat membutuhkan proses penghentian putaran yang cepat, proses penghentian putaran ini disebut juga dengan pengereman. Ada beberapa macam metode yang diguna...
Controlo adaptativo de um motor DC
Ferreira, Luís Filipe Terra
2010-01-01
Produzir com qualidade superior a custos reduzidos com o objectivo de ocupar uma posi cão de destaque no mercado, implica uma ind ustria automatizada com equipamentos so sticados. Grande parte dos equipamentos industriais envolve motores que participam no processo de produ cão. Os equipamentos de produ cão têm cada vez mais de apresentar uma produ cão pr oxima da excelência que s o se consegue com algoritmos de controlo avan cados. A dinâmica dos processos de produ cão impli...
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....
FPGA baserad PWM-styrning av BLDC-motorer
Johansson, Andreas
2003-01-01
This thesis work contains a litterature study about electrical motors in general and how PWM-patterns for brushless DC-motors can be made. A suitable method has been implemented as a simulation model in VHDL. A simulation model of a brushless DC-motor which describes the phasecurrents, torque and angular velocity has also been made. The motor model made simulations easier for the complete PWM-system. The design was synthesised and tested with a prototypeboard including a SPARTAN II FPGA. In ...
Zulkarnain Lubis; A. N. Abdalla; Mortaza; Ruzlaini Ghon
2009-01-01
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 ec...
Energy Technology Data Exchange (ETDEWEB)
NONE
2000-03-01
In order to reduce production cost and increase production efficiency of compressor motors for air conditioners, development was made for the first time in the world on a production line for concentrated winding DC motors in which wires are wound directly on a stator core. Advantages of the concentrated winding motor are size reduction as a result of shortened coil end length, reduction in the amount of copper wire used, and enhancement in the efficiency. The gist in the technical points is as follows: (1) technology to form bobbin with thin wall to ensure insulation when winding; (2) semi-normal inner winding technology to wind wires from inside of the stator core; and (3) automatic coil end terminating technology. When compared to the conventional production line of inserter type motors, the capital investment was reduced by 1/3, installation space by 1/3, manpower by 18 workers, and motor cost by 16%. (translated by NEDO)
Sensorless control of BLDC motor
Hrbáč, Zbyněk
2012-01-01
This thesis is focused on problematics of control of brushless DC motor in the sensor and also in the sensorless mode. Also it interprets possibilities of BLDC motor control with one faulty sensor and derivation and simulation of mathematical model. First part mentions options of rotor position sensing as well as existing methods of sensorless BLDC motor control. Second part describes control algorithms of sensor and sensorless motor control realised on device dSPACE and also realisation of f...
Directory of Open Access Journals (Sweden)
B.V.A.S.S.R.Krishna
2015-10-01
Full Text Available This work presents an effective approach towards reduction of steps in power conversion from solar photovoltaic system to load. When a Photovoltaic system is fed to an induction motor, it requires MPPT controller and an Inverter circuit in first and second stages since Induction motor works with a.c supply. By eliminating the Inverter circuit and employing a BLDC motor the efficiency of the system can be improved. The BLDC motor works under Electronic commutation principle with VSI embedded in the motor. A PV Panel fed to the "R" load with Hill Climbing MPPT is considered along with practical irradiance data. Simulation is carried out by formulating the mathematical model for the photovoltaic source, MPPT, Motor. System performance‟s are investigated under different levels of solar insolation
Investigation of a New Flux-Modulated Permanent Magnet Brushless Motor for EVs
Ying Fan; Lingling Gu; Yong Luo; Xuedong Han; Ming Cheng
2014-01-01
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 o...