Implementation of Brushed DC Motor Control in LabVIEW FPGA
Directory of Open Access Journals (Sweden)
K. Lamár
2013-12-01
Full Text Available The paper introduces the fundamentals of motor control. It explains the basic equations and introduces the control diagram of the brushed DC motor. It introduces the four quadrant DC chopper circuit and the basic methods to operate it. After that, it explains the fundamentals of the current control of DC motors and its two basic methods: the pulse width modulation and the hysteresis current control. Finally it gives a short example of the practical implementation of the hysteresis current controller for the four quadrant DC chopper in LabVIEW FPGA.
A Novel Method for Sensorless Speed Detection of Brushed DC Motors
Directory of Open Access Journals (Sweden)
Ernesto Vazquez-Sanchez
2016-12-01
Full Text Available Many motor applications require accurate speed measurement. For brushed dc motors, speed can be measured with conventional observers or sensorless observers. Sensorless observers have the advantage of not requiring any external devices to be attached to the motor. Instead, voltage and/or current are measured and used to estimate the speed. The sensorless observers are usually divided into two groups: those based on the dynamic model, and those based on the ripple component. This paper proposes a method that measures the current of brushed dc motors and analyses the position of its spectral components. From these spectral components, the method estimates the motor speed. Three tests, performed each with the speeds ranging from 2000 to 3000 rpm either at constant-speed, at slowly changing speeds, or at rapidly changing speeds, showed that the average error was below 1 rpm and that the deviation error was below 1.5 rpm. The proposed method: (i is a novel method that is not based on either the dynamic model or on the ripple component; (ii requires only the measurement of the current for the speed estimation; (iii can be used for brushed dc (direct current motors with a large number of coils; and (iv achieves a low error in the speed estimation.
Adaptive Input-Output Linearization Technique for Robust Speed Control of Brush less DC Motor
Energy Technology Data Exchange (ETDEWEB)
Kim, Kyeong Hwa; Baik, In Cheol; Kim, Hyun Soo; Youn, Myung Joong [Korea Advance Institute of Science and Technology, Taejon (Korea, Republic of)
1997-06-01
An adaptive input-output linearization technique for a robust speed control of a brush less DC (BLDC) motor is presented. By using this technique, the nonlinear motor model can be effectively linearized in Brunovski canonical form, and the desired speed dynamics can be obtained based on the linearized model. This control technique, however, gives an undesirable output performance under the mismatch of the system parameters and load conditions caused by the incomplete linearization. For the robust output response, the controller parameters will be estimated by a model reference adaptive technique where the disturbance torque and flux linkage are estimated. The adaptation laws are derived by the Popov`s hyper stability theory and positivity concept. The proposed control scheme is implemented on a BLDC motor using the software of DSP TMS320C30 and the effectiveness is verified through the comparative simulations and experiments. (author). 14 refs., 12 figs., 1 tab.
Calculation Method of Electromagnetic Torque of DC Motor with Wide Brushes%宽电刷直流电机电磁转矩算法
Institute of Scientific and Technical Information of China (English)
刘敏军; 罗会源; 叶春华
2014-01-01
Brush width has great effects on the electromagnetic torque of DC motor, so the calculation of the electro-magnetic torque without considering the brush width is not precise enough, which can not provide guidance for the design of DC motor, especially DC motor with wide brushes. This study discusses the effects of brush width on the electromagnetic torque of DC motor in details and proposes the calculation method of the electromagnetic torque of DC motor with wide brushes. The experiments show that the given calculation method is more accurate, and the calculation method for the design of DC motor with wide brushes is more instructive.%电刷宽度对直流电机电磁转矩的影响是很大的，因此，在未考虑电刷宽度的条件下所推导出的电磁转矩计算式不够精确，对直流电机尤其是宽电刷直流电机的设计缺乏指导意义。作者详细分析了电刷宽度对直流电机电磁转矩的影响，给出了直流电机电磁转矩的计算方法。实验证明该计算方法更精确、对直流电机设计更具有指导意义。
Directory of Open Access Journals (Sweden)
Sheng Zeng
2013-01-01
Full Text Available This paper presents the adaptive controller design for brushed permanent magnet DC motor used in velocity-tracking applications based on worst-case approach. We first formulate the robust adaptive control problem as a nonlinear H∞-control problem under imperfect state measurement, and then solve it using game-theoretic approach. The controller guarantees the boundedness of closed-loop signals with bounded exogenous disturbances, and achieves desired disturbance attenuation level with respect to the unmeasured exogenous disturbance inputs and the measured disturbance inputs. The strong robustness properties are illustrated by a simulation example.
Calculation Method of Induced Electromotive Force of DC Motor with Wide Brushes%宽电刷直流电机感应电动势算法
Institute of Scientific and Technical Information of China (English)
2013-01-01
电刷宽度对直流电机感应电动势的影响是很大的，因此，在未考虑电刷宽度的条件下所推导出的感应电动势计算式都不够精确，对直流电机尤其是宽电刷直流电机的设计缺乏指导意义。详细分析了电刷宽度对直流电机的感应电动势的影响，给出了宽电刷直流电机感应电动势的计算方法。分析了电刷宽度变化引起感应电动势和电枢电流变化情况，得出了电机在运行中经常出现烧损故障的原因。%The effect of brush width on induced electromotive force of DC motor is obvious. Therefore,the cal-culation of induced electromotive force without considering the brush width is not precise enough,which results in the lack of guiding significance for the design of DC motor,especially DC motor with wide brushes. This pa-per firstly analyzes the effects of the brush width on induced electromotive force of DC motor,and then pro-poses the algorithm for induced electromotive force of DC motor with wide brushes. Through the changes of in-duced electromotive force and armature current caused by the change of the brush width,the reason for burning fault during DC motor running is obtained.
Directory of Open Access Journals (Sweden)
Hacene MELLAH
2016-07-01
Full Text Available The objective of this paper is to develop an Artificial Neural Network (ANN model to estimate simultaneously, parameters and state of a brushed DC machine. The proposed ANN estimator is novel in the sense that his estimates simultaneously temperature, speed and rotor resistance based only on the measurement of the voltage and current inputs. Many types of ANN estimators have been designed by a lot of researchers during the last two decades. Each type is designed for a specific application. The thermal behavior of the motor is very slow, which leads to large amounts of data sets. The standard ANN use often Multi-Layer Perceptron (MLP with Levenberg-Marquardt Backpropagation (LMBP, among the limits of LMBP in the case of large number of data, so the use of MLP based on LMBP is no longer valid in our case. As solution, we propose the use of Cascade-Forward Neural Network (CFNN based Bayesian Regulation backpropagation (BRBP. To test our estimator robustness a random white-Gaussian noise has been added to the sets. The proposed estimator is in our viewpoint accurate and robust.
宽电刷下直流电机换向过程研究%Research of DC Motor Commutation Process with Wide Brushes
Institute of Scientific and Technical Information of China (English)
刘敏军
2013-01-01
传统经典理论对直流电机换向过程的分析结果与实际情况存在较大的差距，本文主要分析了直流电机在宽电刷下的换向过程，结果表明采用不同宽度的电刷，其换向过程不一样，换向元件中电流的变化规律也不一样，产生电磁火花的程度也不一样。%There is a big gap between the analysis results by classical theory of DC motor commutation process and the actual situation. The DC motor commutation process with wide brushes is analyzed, results show that with different widths of the brush, the commutation processes are not the same, and the current variations in the commutation components are not the same, and the degrees of producing electromagnetic spark are not the same.
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...
Improved Rotor Speed Brushless DC Motor using Fuzzy Controller
Jafar Mostafapour; Murtaza Farsadi; Ali Badri; Ebrahim Ogabi
2016-01-01
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...
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...
Improved Rotor Speed Brushless DC Motor using Fuzzy Controller
Directory of Open Access Journals (Sweden)
Jafar Mostafapour
2016-03-01
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 better result can be achieve.
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.
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 Test of the Controller for EPS System with Brush-less DC Motor%无刷直流电机助力式EPS控制器设计与试验
Institute of Scientific and Technical Information of China (English)
江浩斌; 唐斌; 耿国庆
2011-01-01
基于无刷直流电机(BLDCM)模型和汽车电动助力转向(EPS)动力学模型,构建了BLDCM控制仿真模型和EPS性能仿真模型；设计了以ARM7 LPC2131为控制器内核和以MC33034P120为驱动模块的EPS控制器硬件；分析了EPS的助力、回正和阻尼控制对控制器硬件的要求,给出了EPS控制软件的主程序和A/D、速度信号采集与中断服务子程序流程；最后将BLDCM助力式EPS及其控制系统装车进行原地转向试验和蛇形试验,试验结果表明,所设计的EPS控制器与整车匹配良好,性能稳定.%Based on the model for brush-less DC motor (BLDCM) and the dynamic model for electric power steering (EPS) system, the simulation models for BLDCM control and EPS performance are set up. The EPS controller hardware with ARM7LPC2131 as its core and MC33034P120 as drive module is designed, and the requirements of power assistance, aligning and damping controls on controller hardware are analyzed. The flow charts of main program and its subroutine for A/D and speed signals acquisition and interrupt service are given. Finally the BLDCM assisted EPS and its control system are installed on a newly-launched car for spot turn and slalom tests. The results of tests show that the EPS controller designed well matches the vehicle with stable performance.
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.
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.
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BRUSHLESS DC MOTOR BASED ON A COMMON DC SIGNAL
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J.Karthikeyan
2010-06-01
Full Text Available The objective of this project is to build a simple current controlled modulation technique for brushless dc motors. In electric traction and most other applications, a wide range of speed and torque control of the electric motor is required. The dc machine fulfills these requirements, but the dc machine requires constant maintenance. But the brushless permanent magnet motors do not have brushes and so they require less maintenance only. Brushless dc motors are widely used in applications which require wide range of speed and torque control because of its low inertia, fast response, high reliability and maintenance free. This current controlled technique is based on the generation of quasi- square wave currents using only one controller for the three phases. The current control strategy uses a triangular carrier for the power transistors which is simpler and more accuratethan any other options. The advantages of this technique are: a The stator currents are completely characterized by their maximum amplitude , b The three phases are controlled with the same dc component , and then the phase currents are kept at exactly the same magnitude I max, c The dc link current measurement is not required .d phase currents are kept balanced and phase over currents are eliminated.
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.
An insulated-strand fiber brush is provided for a DC motor /generator. The brush is comprised of a plurality of fiber segments which are insulated from one another near the contact surface of a rotor bar. In one embodiment, insulating spacers are fixed to a brush assembly and wear with the fibers, and in another embodiment insulation is provided by a separate shell. (Author)
Brushless DC Motors, Velocity and Position Control of the Brushless DC Motor.
1986-06-01
DC motor was designed using the Hall effect sensors. In addition, the position control of the brushless DC motor was developed using an optical encoder to sense angular position changes and a microprocessor to provide the desired position control. A Pittman 5111 wdg 1 brushless DC motor was used for this study. The design of the digital tachometer and pulse width modulator for velocity control and the design of the Z-80 based microprocessor controller and software design are described in
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...
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.
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.
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.
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.
DC motor operation controlled from a DC/DC power converter in pulse mode with low duty cycle
Stefanov, Goce; Kukuseva, Maja; Citkuseva Dimitrovska, Biljana
2016-01-01
In this paper pulse mode of operation of DC motor controlled by DC/DC power converter is analyzed. DC motor operation with time intervals in which the motor operates without output load is of interest. In this mode it is possible the motor to restore energy. Also, in the paper are represented calculations for the amount of the restored energy in the pulse mode operation of the motor for different duty cycles.
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.
Simulation and Performance of Brushless DC Motor Actuators.
1985-12-01
AD-RI63 725 SIMULATION AND PERFORMANCE OF IRUSHLESS DC MOTOR ACTUATORS(U) NAVAL POSTGRADUATE SCHOOL MONTEREY CA A GERDA DEC 85 NPS69-85-628 M...California Progress Report SIMULATION AND PERFORMANCE OF BRUSHLESS DC MOTOR ACTUATORS IN SUPPORT OF THE PROGRAM "ADVANCED MISSILE CONTROL DEVICES"I of...34.’ SIMULATION AND PERFORMANCE OF BRUSHLESS DC MOTOR ACTUATORS SUMMARY The simulation model for a Brushless D.C. Motor and the associated * commutation power
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
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。
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.
Speed Control of DC Motor using AC/AC/DC Converter Based on Intelligent Techniques
Directory of Open Access Journals (Sweden)
Rakan Kh Antar
2013-05-01
Full Text Available This paper describes the application of ac/ac/dc and ac/dc converters to control the speed of a separately excited DC motor. Artificial neural network and PI controller are trained to select the desired values of firing angles for triggering thyristors of the ac/ac/dc and ac/dc bridge converters in order to control the speed of the dc motor at a desired value with constant and different load torques in order to obtain the best speed response. Simulation results show that the rising time for ac/dc and ac/ac/dc converters at 250rpm are reduced about 79% and 89% respectively, while delay time it reduced about 69% and 64% respectively. Therefore, speed response of the dc motor is more efficient for closed loop system compared with open loop also the response of ac/ac/dc converter is better than ac/dc converter.
Advanced DC Motor Drive for Haptic Devices
Directory of Open Access Journals (Sweden)
Miroslav Božić
2012-06-01
Full Text Available Haptics covers many different forms of mechanical interaction with human senses by engaging, touch, vibrations and forces/torques, established for the purpose of augmenting the feedback structure during human-machine interaction. A haptic device has mechanical part, moved by actuators from one and human hand or fingers from the other, actuators, drives, sensing elements, as well as algorithms designed to control the interaction between human and machine in positioning and motion control tasks. With such a system, motors can be controlled in a way to simulate various environments, defined by their material and dynamics, for example pushing soft ball uphill. Haptic devices are becoming more popular in medical applications after introduction of modern medical robots with many different extensions for minimally invasive surgery or diagnostics based on palpation. This paper discusses one DC motor driver custom designed for the purpose of designing a haptic device for medical applications.
Variable Rail Voltage Control of a Brushless DC (BLDC) Motor
2013-01-01
Variable Rail Voltage Control of a Brushless DC (BLDC) Motor by Yuan Chen, Joseph Conroy, and William Nothwang ARL-TR-6308 January 2013...TR-6308 January 2013 Variable Rail Voltage Control of a Brushless DC (BLDC) Motor Yuan Chen, Joseph Conroy, and William Nothwang Sensors...DATES COVERED (From - To) 4. TITLE AND SUBTITLE Variable Rail Voltage Control of a Brushless DC (BLDC) Motor 5a. CONTRACT NUMBER 5b. GRANT
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
Kusuma, G.; 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...
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.
Wideband impedance measurements of DC motors under dynamic load conditions
Diouf, Fatou; Buesink, Frits; Leferink, Frank; Duval, Fabrice; Bensetti, Mohamed
2013-01-01
One of the principal conducted EMI(electromagnetic interferences) sources of low voltage DC (direct current) motors is the commutation occurring during rotation. In this paper the small-signal impedance of low voltage DC motors under different functioning modes, including the dynamic one is studied
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.
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 thi...
Design optimization of brushed permanent magnet D C motor by genetic algorithm
Amini, S
2002-01-01
Because of field winding replacement with permanent magnet in brushed permanent magnet D C (PMDC) motors, field losses are eliminated and the structure of the motor is more simple. Efficiency of these motors is therefore increased and the manufacturing process is simplified. Hence, these motors are commonly used in low power applications and their design and optimization is an important consideration. Genetic algorithms are proposed for design optimization of PMD motors because of their independence to objective function structure and its derivative. In this paper genetic algorithms are evaluated for PMDC motor design optimization. an introduction is first presented about PMDC motors, general design procedure and elements of their optimization. Genetic algorithms are then briefly described. Finally results of optimization by genetic algorithms are compared with the one obtained using a conventional method.
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...
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...
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.
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.
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.
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.
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...
Mathematical modeling of electromechanical processes in a brushless DC motor
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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.
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.
Summary on Sensorless permanent magnet Brushless DC Motor Control Strategies
Li Hai Xia; Cao Yang
2016-01-01
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.
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.
PERFORMANCE EVALUATION OF HYBRID FUZZY LOGIC CONTROLLER FOR BRUSHLESS DC MOTOR DRIVE
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C. SUBBA RAMI REDDY
2011-06-01
Full Text Available This paper presents Hybrid fuzzy logic controller (HFLC for the well developed and sophisticated simulation model of Brush less DC (BLDC motor drive using MATLAB. The developed simulation model has been examined by the PID controller and HFLC. The performance of the controllers is evaluated more precisely from various simulation studies for variations in the load torque and speed of BLDC motor drive. A performance comparison of two controllers is also carried out by taking various performance measures such as settling time, steady state error, peak overshoot, the integral of the absolute value of the error (IAE and the integral of the time-weighted squared error (ITSE. The results confirm that the developed simulation model is very convenient for the precise evaluation of performance and the HFLC shows improved performance over the PID controller in terms of disturbance rejection or parameter variation.
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.
Directory of Open Access Journals (Sweden)
R. Silva-Ortigoza
2014-01-01
Full Text Available 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 is designed to ensure that the output voltage of the DC/DC Buck converter tracks the voltage profile imposed by the high level control. In order to experimentally verify the hierarchical controller performance, a DS1104 electronic board from dSPACE and Matlab-Simulink are used. The switched implementation of the hierarchical average controller is accomplished by means of pulse width modulation. Experimental results of the hierarchical controller for the velocity trajectory tracking task show good performance and robustness against the uncertainties associated with different system parameters.
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.
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.
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
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.
Modeling Interactions Between Flexible Flapping Wing Spars, Mechanisms, and Drive Motors
2011-09-01
flapping wing spars. The model can be used to examine the coupled system-level behavior of brushed DC motors , gear trains, and any number of linkages and...mechanisms consist of a brushed DC motor and gear train in combination with linkage elements, flexible wing spars, and wing surfaces. The aerodynamic and...characteristics of the motion of flexible wing spars that are driven by ornithopter linkages and brushed DC motors . There are three principal types of
The Model of Brushless Dc Motor Drive
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Aurelijus Pitrėnas
2013-05-01
Full Text Available The research considered the operation, control, mathematical and simulation models of BLDC motor. A simplified idealized simulation model was designed and tested using Matlab Simulink software package. The simulation model uses Hall effect sensor signals for determining the rotor position. Simulation was done for Maxon, EC-4 pole 22 BL A series motor. The obtained model testing results deviate from the data supplied by the motor manufacturer by as little as 0.2–10.6%; consequently, the implemented model is suitable for BLDC motor control study and research.Article in Lithuanian
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.
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.
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.
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.
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.
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.
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.
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.
Digital Signal Controller Based Digital Control of Brushless DC Motor
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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
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...
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.
Accurate torque-speed performance prediction for brushless dc motors
Gipper, Patrick D.
Desirable characteristics of the brushless dc motor (BLDCM) have resulted in their application for electrohydrostatic (EH) and electromechanical (EM) actuation systems. But to effectively apply the BLDCM requires accurate prediction of performance. The minimum necessary performance characteristics are motor torque versus speed, peak and average supply current and efficiency. BLDCM nonlinear simulation software specifically adapted for torque-speed prediction is presented. The capability of the software to quickly and accurately predict performance has been verified on fractional to integral HP motor sizes, and is presented. Additionally, the capability of torque-speed prediction with commutation angle advance is demonstrated.
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.
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.
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....
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.
Development of Electronic Circulating Pump by Axial Air-gap Type Brush less Motor for Boiler
Energy Technology Data Exchange (ETDEWEB)
Kim, Sang Uk; Lee, Chang Eon; Kim, Young Seok; Yim, Chang Soon [Inha University (Korea, Republic of); Kim, Dong Chun [Pyung Taek Technical Junior College (Korea, Republic of); Suh, Sung Won [Bupyung Technical High School (Korea, Republic of)
1997-04-30
Canned type household circulating pump in the country almost depends on the act of imports, however it has disadvantage of low efficiency because an air gap of between rotor and stator is large and when the boiler is not used in a period of summer, a can and a rotor become adhered each other. Accordingly the pump is impossible to drive the initial state, and a lifetime of the pump gets shortening. To overcome these defects a electronic circulating pump by axial air-gap type brush less motor which is completely depart from the general idea for the conventional pump is developed. This paper is verified through experiments that the developed pump has good performance for reduction of size and noise, retrenchment of cost, and improvement of efficiency in comparison with the conventional pump. (author). refs., figs., tabs.
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
Directory of Open Access Journals (Sweden)
Zulkarnain Lubis
2009-01-01
Full Text Available Problem statement: With emphasis on a cleaner environment and efficient operation, vehicles today rely more and more heavily on electrical power generation for success. Approach: Mathematical modeling the components of the HEV as the three phase induction motor couple to DC motor in hybrid electric vehicle was introduced. The controller of Induction Motor (IM was designed based on input-output feedback linearization technique. It allowed greater electrical generation capacity and the fuel economy and emissions benefits of hybrid electric automotive propulsion. Results: A typical series hybrid electric vehicle was modeled and investigated. Conclusion: Various tests, such as acceleration traversing ramp and fuel consumption and emission were performed on the proposed model of 3 phase induction motor coupler DC motor in electric hybrid vehicles drive.
Performance of Networked DC Motor with Fuzzy Logic Controller
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B. Sharmila
2010-07-01
Full Text Available In the recent years the usage of data networks has been increased due to its cost effective and flexible applications. A shared data network can effectively reduce complicated wiring connections, installation and maintenance for connecting a complex control system with various sensors, actuators, and controllers as a networked control system. For the time-sensitive application with networked control system the remote dc motor actuation control has been chosen. Due to time-varying network traffic demands and disturbances, the guarantee of transmitting signals without any delays or data losses plays a vital role for the performances in using networked control systems. This paper proposes Fuzzy Logic Controller methodology in the networked dc motor control and the results are compared with the performance of the system with Ziegler-Nichols Tuned Proportional-Integral-Derivative Controller and Fuzzy Modulated Proportional-Integral-Derivative Controller. Simulations results are presented to demonstrate the proposed schemes in a closed loop control. The effective results show that the performance of networked control dc motor is improved by using Fuzzy Logic Controller than the other controllers.
On-line Identification of the DC motor Parameters by using Least Mean Square Recursive Method
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Marian Gaiceanu
2014-09-01
Full Text Available The on-line least square parameters (electrical and mechanical identification method of the separately DC motor is presented in this paper. The parameters of the DC machine are time dependent; therefore, for the DC drive control the on-line parameters identification procedure is mandatory. By knowing accurately the DC motor parameters, the parameters of the DC speed and current cascade controllers can be obtained.
Forward and Reverse Motoring of DC Hoist Motor on Container Crane (CC Operation
Directory of Open Access Journals (Sweden)
Rukmini
2015-03-01
Full Text Available Container cranes (CC become the highest electric energy consumption equipment in container terminal. Therefore it is important to study and analyze the hoist motor as the largest motor on container crane operation to look for opportunities in use energy efficiently. Lifting and lowering the container as the fixed operation of CC. Lifting the container as forward operating of hoist motor and lowering the container as reverse operating of hoist motor. The type of DC motor have used to modelling. Simulink (one of Matlab toolboxes was used to model the forward and reverse of DC hoist motor. When lifting the container (forward motoring, the current required depends on the applied load torque. But when lowering the containers (reverse motoring, the voltage generated by the engine polarity reverse is determined by the downward movement of containers (mass and height. Reverse the polarity, and let the motor functions as a generator, produces a current and then the potential energy was calculated. Conclusions were drawn at the end of the paper.
Torque Control of a Separate-Winding Excitation DC Motor for a Dynamometer
2010-12-01
In this thesis, the theory behind a separate-winding excitation direct current ( DC ) motor and profile of the motor’s torque versus rotor speed is... DC motor is proportional to the armature current. From this theory, a program was written in Simulink with Xilinx embedded software to enable a user...to command the DC motor torque through a Graphical User Interface (GUI). The command is then converted to control armature current through a Field
Energy Technology Data Exchange (ETDEWEB)
Sato, T. [Max Co. Ltd., Tokyo (Japan)
1999-03-15
A digital control development effort is introduced, citing a case of DSP (digital signal processor)-aided DC servo motor control for the flat head type pen plotter. In a real plotter, a complicated nonlinear problem will arise because the natural frequency varies dependent upon the pen position. For the inhibition of such vibration which occurs during acceleration and deceleration, nonlinear elements have to be taken into consideration at the designing stage. In this report, the effort is focused on motor axis control only, and the DC servo control problem is solved as a linear problem. A DSP board type DS1102 of the dSPACE Corporation is named for this work. Using this board, the C code is automatically generated out of a control block constructed through SIMULINK, and a real-time test is conducted after downloading the code to the DSP processor. Since the quantity of DC servo motor rotation is quantized in an encoder, the result would contain much error and cause instability in the control if the quantity as obtained was subjected to differential calculus. Such being the case, velocity data for the control in this report are acquired by use of an observer. (NEDO)
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.)
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.
Pulse Width Modulator Controller Design for a Brushless DC Motor Position Servo.
1987-06-01
performance. This thesis involves computer aided design of a functionally robust brushless dc motor position controller using pulse width modulation...Recent interest in positioning cruise missile flight control surfaces using electromechanical actuation has prompted a detailed study of brushless dc ... motor performance in such an application. While the superior response characteristics of these electronically commutated motors are particularly well
A new surface-inset, permanent-magnet, brushless dc motor drive for electric vehicles
Chau, KT; J. Gan; 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...
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.
Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
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R. Saranya, S. Saravana kumar,R. Baskaran, A. Vinidha Roc, K. Sathiyasekar
2014-04-01
Full Text Available The Brushless Direct Current (BLDC motors are one of the motor types that is gaining rapid popularity. Its major appliances include refrigerators, washing machines, vacuum cleaners, freezers, etc. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. This paper proposes a new optimized technique for the Sensorless operation of permanent magnet brushless direct current (BLDC motor, which is based on back Electro Motive Force (back EMF, Zero Crossing Detection (ZCD. This proposed commutation technique of BLDC motor significantly reduces sensing circuits and cost of motor drive.
Controlling DC Motor using Microcontroller (PIC16F72) with PWM
Shruti Shrivastava, Jageshwar Rawat, Amit Agrawal
2012-01-01
Motion control plays a vital role in industrial atomization. Different types of motors AC, DC, SERVO or stepper are used depending upon the application; of these DC motors are widely used because of easier controlling. Among the different control methods for DC motor armature voltage control method using pulse width modulation (PWM) is best one. We can realize the PWM using H-bridge built with IGBT switches or transistors. To generate PWM signals we use PIC16F7...
Institute of Scientific and Technical Information of China (English)
LIU Man-lan; ZHU Chun-bo; WANG Tie-cheng
2005-01-01
In order to guarantee quality during mass serial production of motors, a convenient approach on how to detect and diagnose the faults of a permanent-magnetic DC motor based on armature current analysis and BP neural networks was presented in this paper. The fault feature vector was directly established by analyzing the armature current. Fault features were extracted from the current using various signal processing methods including Fourier analysis, wavelet analysis and statistical methods. Then an advanced BP neural network was used to finish decision-making and separate fault patterns. Finally, the accuracy of the method in this paper was verified by analyzing the mechanism of faults theoretically. The consistency between the experimental results and the theoretical analysis shows that four kinds of representative faults of low power permanent-magnetic DC motors can be diagnosed conveniently by this method. These four faults are brush fray, open circuit of components, open weld of components and short circuit between armature coils. This method needs fewer hardware instruments than the conventional method and whole procedures can be accomplished by several software packages developed in this paper.
Energy Technology Data Exchange (ETDEWEB)
Widyan, M.S.
2010-07-01
Photovoltaic (PV) cells for powering direct current (DC) motors are designed to provide maximum output power at the rated conditions of the motors. This paper presented the dynamic and steady-state characteristics of DC shunt, series and permanent-magnet motors fed by PV cells via a DC-DC buck-boost (step up-step down) switch mode converter. It considered the nonlinearities of the output characteristics of the PV cells and that of the magnetization curve of the machines. In order to address the problem of voltage regulation of the PV cells and the variation in solar illumination, the duty cycle controls the output voltage of the DC-DC converter to maintain a fixed voltage across the terminals of the motors at any realistic loading conditions. In this study, the DC-DC buck-boost switch mode converter achieved a fixed voltage across the terminals of the motors and therefore good speed regulation under a wide range of loading conditions and solar intensities. The entire study was carried out using the Matrix Laboratory Program MATLAB{sup TM} software.
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.
Wideband impedance measurements and modeling of DC motors for EMI predictions
Diouf, Fatou; Leferink, Frank; Duval, Fabrice; Bensetti, Mohamed
2015-01-01
In electromagnetic interference prediction, dc motors are usually modeled as a source and a series impedance. Previous researches only include the impedance of the armature, while neglecting the effect of the motor's rotation. This paper aims at measuring and modeling the wideband impedance of a dc
Ginting, Eka Dian Arjuna
2011-01-01
Motor adalah mesin yang mengubah energi listrik menjadi energi mekanis. Pada motor arus searah energi listrik arus searah diubah menjadi energi mekanis. Dalam dunia industri, motor arus searah banyak digunakan sebagai penggerak pompa air, blower, hoist pada crane. Dalam operasi suatu motor DC maka akan timbul rugi – rugi panas sehingga terjadi kenaikan suhu yang menyebabkan kerusakan isolasi pada motor DC tersebut. Pada motor DC rugi – rugi panas lebih besar terjadi pada kea...
Tuning of PID Controller for A Linear Brushless DC Motor using Swarm Intelligence Technique
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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.
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.
Appelbaum, J.; Singer, S.
1989-01-01
A calculation of the starting torque ratio of permanent magnet, series, and shunt-excited dc motors powered by solar cell arrays is presented for two cases, i.e., with and without a maximum-power-point tracker (MPPT). Defining motor torque magnification by the ratio of the motor torque with an MPPT to the motor torque without an MPPT, a magnification of 3 for the permanent magnet motor and a magnification of 7 for both the series and shunt motors are obtained. The study also shows that all motor types are less sensitive to solar insolation variation in systems including MPPTs as compared to systems without MPPTs.
Dynamic modeling of brushless dc motors for aerospace actuation
Demerdash, N. A.; Nehl, T. W.
1980-11-01
A discrete time model for simulation of the dynamics of samarium cobalt-type permanent magnet brushless dc machines is presented. The simulation model includes modeling of the interaction between these machines and their attached power conditioners. These are transistorized conditioner units. This model is part of an overall discrete-time analysis of the dynamic performance of electromechanical actuators, which was conducted as part of prototype development of such actuators studied and built for NASA-Johnson Space Center as a prospective alternative to hydraulic actuators presently used in shuttle orbiter applications. The resulting numerical simulations of the various machine and power conditioner current and voltage waveforms gave excellent correlation to the actual waveforms collected from actual hardware experimental testing. These results, numerical and experimental, are presented here for machine motoring, regeneration and dynamic braking modes. Application of the resulting model to the determination of machine current and torque profiles during closed-loop actuator operation were also analyzed and the results are given here. These results are given in light of an overall view of the actuator system components. The applicability of this method of analysis to design optimization and trouble-shooting in such prototype development is also discussed in light of the results at hand.
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.
Research of subdivision driving technology for brushless DC motors in optical fiber positioning
Kan, Yi; Gu, Yonggang; Zhu, Ye; Zhai, Chao
2016-07-01
In fiber spectroscopic telescopes, optical fiber positioning units are used to position thousands of fibers on the focal plane quickly and precisely. Stepper motors are used in existing units, however, it has some inherent deficiencies, such as serious heating and low efficiency. In this work, the universally adopted subdivision driving technology for stepper motors is transplanted to brushless DC motors. It keeps the advantages of stepper motors such as high positioning accuracy and resolution, while overcomes the disadvantages mentioned above. Thus, this research mainly focuses on develop a novel subdivision driving technology for brushless DC motor. By the proving of experiments of online debug and subdivision speed and position, the proposed brushless DC motor subdivision technology can achieve the expected functions.
Stability and Speed Control of a Series-Wound DC Motor
Khoroshun, A. S.
2016-07-01
A speed control for a series-wound DC motor is proposed. It is shown that steady-state rotation is stabile and robust. Stability is analyzed using a quadratic Lyapunov function. Its explicit expression is derived
A new method for speed control of a DC motor using magnetorheological clutch
Nguyen, Quoc Hung; Choi, Seung-Bok
2014-03-01
In this research, a new method to control speed of DC motor using magnetorheological (MR) clutch is proposed and realized. Firstly, the strategy of a DC motor speed control using MR clutch is proposed. The MR clutch configuration is then proposed and analyzed based on Bingham-plastic rheological model of MR fluid. An optimal designed of the MR clutch is then studied to find out the optimal geometric dimensions of the clutch that can transform a required torque with minimum mass. A prototype of the optimized MR clutch is then manufactured and its performance characteristics are experimentally investigated. A DC motor speed control system featuring the optimized MR clutch is designed and manufactured. A PID controller is then designed to control the output speed of the system. In order to evaluate the effectiveness of the proposed DC motor speed control system, experimental results of the system such as speed tracking performance are obtained and presented with discussions.
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.
Brushless DC Motor Drive during Speed Regulation with Artificial Neural Network Controller
Sakshi Solanki
2016-01-01
Brushless DC motor, at this moment is extensively used being many industrial functions due to the different features like high efficiency and dynamic response and high speed range. This paper is proposing a technology named as Artificial Neural Network controller to control the speed of the brushless DC motor. Here the paper contributes an analysis of performance Artificial Neural Network controller. Because it is difficult to handle by the use of conventional PID controller as BL...
Analysis of Commutation Torque Ripple Minimization for Brushless DC Motor Based on SEPIC Converter
R.Jogarao; Mouliswararao.Reddy; G. Ashok
2016-01-01
Brushless DC Motors (BLDCM) are widely used in automated industrial applications like Computer Numerical Control (CNC) machinery, aerospace applications and in the field of robotics.But it still suffers from commutation torque which mainly depends on speed and transient line commutation interval. BLDC MOTOR torque ripple causes increased acoustic noise and undesirable speed fluctuation. This paper presents a new circuit topology and dc link voltage current in the control strategy to keep inco...
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.
Neural adaptive sliding mode speed tracking control of a DC motor
Institute of Scientific and Technical Information of China (English)
刘子龙; 刘国忠; 刘洁
2004-01-01
We propose a BPNN based adaptive sliding mode control scheme for speed tracking of a DC motor with unknown system nonlinearities. The input-output linearization technique is used to cancel the nonlinearities, and output of the BPNN is incorporated into the controller in the proposed scheme. It is shown that the rotor speed of a DC motor can follow any arbitrarily selected trajectories under variable load torque. Then the application of the approach is tested via some simulations.
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.
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.
Finite Control Set Model Predictive Speed Control of a DC Motor
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Viktor Šlapák
2016-01-01
Full Text Available The paper describes the design procedure for a finite control set model predictive control (FCS-MPC of brushed permanent magnet DC (PMDC machine supplied from DC-DC converter. Full order linear Kalman filter is used for estimation of an unmeasured load torque and reduction of speed measurement noise. A new cost function has been introduced with a feedforward dynamic current component and a feedforward static load current component. The performance of the proposed control strategy is compared to the conventional PI-PWM cascade speed control through the experimental verification on the 250 W laboratory prototype. Obtained results show excellent dynamic behaviour and indicate possible energy savings of the proposed speed control.
Numerical and Experimental Investigation of Heat Flow in Permanent Magnet Brushless DC Hub Motor
DEFF Research Database (Denmark)
Fasil, Muhammed; Plesner, Daniel; Walther, Jens Honore
2014-01-01
This paper investigates the heat dissipation in the hub motor of an electric two-wheeler using lumped parameter (LP), finite element (FE) and computational fluid dynamic (CFD) models. The motor uses external rotor permanent magnet brushless DC topology and nearly all of its losses are generated i...
The elements of synthesis of brushless d.c. motor with permanent magnets
Ткачук, Василь Іванович; Біляковський, Ігор Євгенович
2010-01-01
The elements of synthesis of Brushless d.c. Motor with permanent magnets on a rotor and pseudo by U-similar stator is offered. The mathematical model of project calculation of main geometrical dimensions of such Motor is based on these elements.
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.
AVR Microcontroller-based automated technique for analysis of DC motors
Kaur, P.; Chatterji, S.
2014-01-01
This paper provides essential information on the development of a 'dc motor test and analysis control card' using AVR series ATMega32 microcontroller. This card can be interfaced to PC and calculates parameters like motor losses, efficiency and plot characteristics for dc motors. Presently, there are different tests and methods available to evaluate motor parameters, but a single and universal user-friendly automated set-up has been discussed in this paper. It has been accomplished by designing a data acquisition and SCR bridge firing hardware based on AVR ATMega32 microcontroller. This hardware has the capability to drive the phase-controlled rectifiers and acquire real-time values of current, voltage, temperature and speed of motor. Various analyses feasible with the designed hardware are of immense importance for dc motor manufacturers and quality-sensitive users. Authors, through this paper aim to provide details of this AVR-based hardware which can be used for dc motor parameter analysis and also for motor control applications.
Optimization of Consumed Power in Two Different DC Motors Coupled Based on Genetic Algorithm
Directory of Open Access Journals (Sweden)
Mehrdad Jafarboland
2011-01-01
Full Text Available A single DC motor can be substituted by two different couple DC motors in submarines. By this way, by varying the speed of submarine, the power of propellant and subsequently the mechanical power of these motors would vary. One important promlem in controlling the mechanical coupling of these motors is the power sharing between them. In the previous reports the mechanical power was shared between them in nonoptimized manner. In this paper an optimized cantroller is indroduced that optimize the efficiency of the system. The power sharing between these motors would vary according to their speed. The proposed controller is based on Genetic Algoritm and is able to share the mechanical power between the motors in an optimized manner at different speeds. The simutation results shows the well behavior of system and also the optimize power sharing.
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
The design and analysis of a novel brushless dc linear motor
Basak, A.; Filho, A. F. Flores
1994-05-01
A novel brushless dc linear motor was designed, with two armature cores and seven high energy product magnets. It was then built and tested. Both the design and the analysis were carried out assuming a linear magnetic circuit. The design procedure and the test results are presented and discussed in this paper. The new motor can also be used as a slotless linear stepping motor.
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.
Development of a dc Motor Model and an Actuator Efficiency Model
Energy Technology Data Exchange (ETDEWEB)
Watkins, John Clifford; Mc Kellar, Michael George; DeWall, Kevin George
2001-07-01
For the past several years, researchers at the Idaho National Engineering and Environmental Laboratory, under the sponsorship of the U.S. Nuclear Regulatory Commission, have been investigating the ability of motor-operated valves (MOVs) used in Nuclear Power Plants to close or open when subjected to design basis flow and pressure loads. Part of this research addresses the response of a dcpowered motor-operated gate valve to assess whether it will achieve flow isolation and to evaluate whether it will slow down excessively under design-basis conditions and thus fail to achieve the required stroke time. As part of this research, we have developed a model of a dc motor operating under load and a model of actuator efficiency under load based on a first principle evaluation of the equipment. These models include the effect that reduced voltage at the Motor Control Center and elevated containment temperatures have on the performance of a dc powered MOV. The model also accounts for motor torque and speed changes that result from the heatup of the motor during the stroke. These models are part of the Motor- Operated Valve In Site Test Assessment (MISTA) software which is capable of independently evaluating the ability of dc-powered motoroperated gate valves to achieve flow isolation and to meet required stroke times under design-basis conditions. This paper presents an overview of the dc motor model and the actuator efficiency under load model. The paper then compares the analytical results from the models with the results of actual dc motor and actuator testing, including comparisons of the effect reduced voltage, elevated containment temperature, and motor heating during the stroke have on an MOV.
DC Motor Load Analysis and Cooling Consideration to Optimise the Power Consumption- Case Study
Directory of Open Access Journals (Sweden)
Mr. K.G. Bante
2013-06-01
Full Text Available The need of energy conservation is the increased requirement of all industries as the cost of the energy increasing day by day. DC motors have been the workhorse of variable speed drives in the continuous steel rolling mills for many years. DC motors in the steel rolling mills are usually separately ventilated by providing air blower, heat exchanger and water. Cooling air is circulated inside the motor by air blower. Water circulates through the heat exchanger and cools the air. Energy consumption by the air blower plays a vital role in optimizing the energy consumption. This article indicates that the loading pattern of the DC motor should decide the control strategy for effective and efficient cooling arrangement.
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.
Design of and Research on Brushless DC Motor for Compressors%压缩机用无刷直流电机的设计与研究
Institute of Scientific and Technical Information of China (English)
彭峰; 谷爱昱; 梁德志; 罗志伟
2015-01-01
针对电机的性能要求指标，根据电机电磁设计方法来确定电机的主要尺寸。无刷直流电机的转矩波动会引起电机的振动、产生电机噪声，从而影响电机的性能。齿槽转矩是引起电机转矩波动的重要因素，基于 Maxwell 建立该电机的二维模型，对其进行有限元分析，并利用不等厚永磁体的方法来降低该电机的齿槽转矩。最后通过 Ma x-well仿真对比，验证降低齿槽转矩方法的可行性。%To meet the motor performance re-quirements ,the main dimensions of the motor are determined according to the electromagnetic design method of the motor.The torque ripple of brush-less DC motor can cause the vibration of the motor and generate motor noise,thereby affecting motor performance.Cogging torque is one of the impor-tant factors causing motor torque fluctuation. Based on Maxwell,two dimensional model of the motor is established to carry out finite element a-nalysis.And methods like permanent magnet of unequal thickness are used to reduce the cogging torque in the motor. Finally, through Maxwell simulation, results verify the feasibility of the method for reducing cogging torque.
Brushless DC electric motor application in environment CH4 sensor
Drozd, Jakub; Duk, Mariusz; Borecki, Michał
2016-09-01
The work includes using a brushless direct current motor ventilator as a machine which fills a container where methane sensor is researched. The main issue is to choose the best controlling method and implement it to self-made driver of the motor.
A microcontroller-based sensorless brushless DC (BLDC) motor drive for areomodelling
Cao, Long-han; Liu, Tao; Li, Rui; Wu, Fan
2007-12-01
A novel approach to back-EMF detection of sensorless brushless DC motor drive systems was proposed. Theoretical analysis of back-EMF sensing is presented, and indicates the back-EMF signal can be extracted for each floating phase whether the PWM is on or off time. As a result, the proposed method rejects the high frequency switching noise and no filtering. Moreover, it provides a highly accurate zero crossing point. This proposed sensing scheme is implemented into a microcontroller for a sensorless BLDC motor. The microcontroller has been successfully applied to the aeromodelling motor. The applied results verify the theoretical analysis and demonstrate that the microcontroller provide a good motor performance.
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.
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.
Analysis of Commutation Torque Ripple Minimization for Brushless DC Motor Based on SEPIC Converter
Directory of Open Access Journals (Sweden)
R.Jogarao
2016-11-01
Full Text Available Brushless DC Motors (BLDCM are widely used in automated industrial applications like Computer Numerical Control (CNC machinery, aerospace applications and in the field of robotics.But it still suffers from commutation torque which mainly depends on speed and transient line commutation interval. BLDC MOTOR torque ripple causes increased acoustic noise and undesirable speed fluctuation. This paper presents a new circuit topology and dc link voltage current in the control strategy to keep incoming and outgoing phase currents changing at the same rate during commutation. In this paper dc-dc single ended primary inductor converter (SEPIC a switch selection circuit are employed in front of inverter. In order to obtain the desired commutation voltage resulting in reduced commutation torque ripple. Compared with simulation result conventional system and proposed method can obtain desired voltage much faster and minimize commutation torque ripple more efficiently.
Sensorless DC motor drive via optimal observer-based servo control
Energy Technology Data Exchange (ETDEWEB)
Thananchai Keephakpreeda [Thammasat University (Thailand). School of Industrial and Mechanical Engineering
2002-07-01
This paper proposes an alternative design of a sensorless DC motor drive via optimal observer-based servo control. Without the speed sensor, the extended Luenberger observer is implemented to estimate the rotor speed of the DC motor in the presence of the disturbance torque. With this knowledge of the speed estimated from the observer, the servo state-feedback controller can drive such a rotor speed to follow the desired one. The stability and performance of the DC drive system can be guaranteed by the optimal control which minimizes the H{sub 2} norm of the closed-loop feedback control and observer system. The simulation and experimental studies are demonstrated for the effectiveness of the proposed control methodology in a practical approach for the sensorless DC drive. (author)
Research of Compound Control for DC Motor System Based on Global Sliding Mode Disturbance Observer
Directory of Open Access Journals (Sweden)
He Zhang
2014-01-01
Full Text Available Aiming at the problems of modeling errors, parameter variations, and load moment disturbances in DC motor control system, one global sliding mode disturbance observer (GSMDO is proposed based on the global sliding mode (GSM control theory. The output of GSMDO is used as the disturbance compensation in control system, which can improve the robust performance of DC motor control system. Based on the designed GSMDO in inner loop, one compound controller, composed of a feedback controller and a feedforward controller, is proposed in order to realize the position tracking of DC motor system. The gains of feedback controller are obtained by means of linear quadratic regulator (LQR optimal control theory. Simulation results present that the proposed control scheme possesses better tracking properties and stronger robustness against modeling errors, parameter variations, and friction moment disturbances. Moreover, its structure is simple; therefore it is easy to be implemented in engineering.
Design of direct drive robot using indigenously developed d.c. torque motors
Athani, Vithal V.
The range of high-performance torque motors, which were indigenously developed for use in multistage satellite launch vehicles, is described. The main features that set dc torque motors apart from dc servomotors are: high peak torque, power, and current over short periods of operation, low speed of operation, obviating the need for gearing, high torque/inertia and torque/weight ratios, and high figure of merit = torque/sq rt watt ratio. The dc torque motors are eminently suited to high-performance applications requiring high torque at low speed of operation, such as aircraft and missile control surface actuation, control of multistage satellite launch vehicles, certain computer peripherals like magnetic tape transports and hard disk drives, and robotics, CNC systems, and machine tool control.
Neuro-Fuzzy DC Motor Speed Control Using Particle Swarm Optimization
Directory of Open Access Journals (Sweden)
Boumediene ALLAOUA
2009-12-01
Full Text Available This paper presents an application of Adaptive Neuro-Fuzzy Inference System (ANFIS control for DC motor speed optimized with swarm collective intelligence. First, the controller is designed according to Fuzzy rules such that the systems are fundamentally robust. Secondly, an adaptive Neuro-Fuzzy controller of the DC motor speed is then designed and simulated; the ANFIS has the advantage of expert knowledge of the Fuzzy inference system and the learning capability of neural networks. Finally, the ANFIS is optimized by Swarm Intelligence. Digital simulation results demonstrate that the deigned ANFIS-Swarm speed controller realize a good dynamic behavior of the DC motor, a perfect speed tracking with no overshoot, give better performance and high robustness than those obtained by the ANFIS alone.
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...
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...
A lightweight electronically commutated dc motor for electric passenger vehicles
Echolds, E. F.; Walla, P. S.
1982-09-01
A functional model breadboard converter and a rare-earth-cobalt, permanent magnet motor; as well as an engineering model converter and PM motor suitable for vehicle installations were developed and tested. The converter and motor achieved an 88% peak efficiency, a maximum output of 26 kW at 26,000 rpm, and a continuous rating of 15 kW. The system also generated power to the source during braking, with a demonstrated peak power available at the converter terminals of approximately 26 kW at 88% efficiency. Major conclusions include: (1) the SAE J227a(D) driving cycle efficiency for the converter/motor is 86% to 88% when energy available for recovery at the converter terminals is included; (2) the converter initial cost is approximately five times that of the permanent magnet motor, but can be reduced by means of LSI logic and integrated liquid cooled semiconductor packages; and (3) an electronically commutated motor with a liquid cooled converter will operate reliably without service or maintenance for the life of a passenger vehicle.
A lightweight electronically commutated dc motor for electric passenger vehicles
Echolds, E. F.; Walla, P. S.
1982-01-01
A functional model breadboard converter and a rare-earth-cobalt, permanent magnet motor; as well as an engineering model converter and PM motor suitable for vehicle installations were developed and tested. The converter and motor achieved an 88% peak efficiency, a maximum output of 26 kW at 26,000 rpm, and a continuous rating of 15 kW. The system also generated power to the source during braking, with a demonstrated peak power available at the converter terminals of approximately 26 kW at 88% efficiency. Major conclusions include: (1) the SAE J227a(D) driving cycle efficiency for the converter/motor is 86% to 88% when energy available for recovery at the converter terminals is included; (2) the converter initial cost is approximately five times that of the permanent magnet motor, but can be reduced by means of LSI logic and integrated liquid cooled semiconductor packages; and (3) an electronically commutated motor with a liquid cooled converter will operate reliably without service or maintenance for the life of a passenger vehicle.
Sensorless load torque estimation and passivity based control of buck converter fed DC motor.
Kumar, S Ganesh; Thilagar, S Hosimin
2015-01-01
Passivity based control of DC motor in sensorless configuration is proposed in this paper. Exact tracking error dynamics passive output feedback control is used for stabilizing the speed of Buck converter fed DC motor under various load torques such as constant type, fan type, propeller type, and unknown load torques. Under load conditions, sensorless online algebraic approach is proposed, and it is compared with sensorless reduced order observer approach. The former produces better response in estimating the load torque. Sensitivity analysis is also performed to select the appropriate control variables. Simulation and experimental results fully confirm the superiority of the proposed approach suggested in this paper.
Incorporation of fractional-order dynamics into an existing PI/PID DC motor control loop.
Tepljakov, Aleksei; Gonzalez, Emmanuel A; Petlenkov, Eduard; Belikov, Juri; Monje, Concepción A; Petráš, Ivo
2016-01-01
The problem of changing the dynamics of an existing DC motor control system without the need of making internal changes is considered in the paper. In particular, this paper presents a method for incorporating fractional-order dynamics in an existing DC motor control system with internal PI or PID controller, through the addition of an external controller into the system and by tapping its original input and output signals. Experimental results based on the control of a real test plant from MATLAB/Simulink environment are presented, indicating the validity of the proposed approach.
Efficiency of particle swarm optimization applied on fuzzy logic DC motor speed control
Directory of Open Access Journals (Sweden)
Allaoua Boumediene
2008-01-01
Full Text Available This paper presents the application of Fuzzy Logic for DC motor speed control using Particle Swarm Optimization (PSO. Firstly, the controller designed according to Fuzzy Logic rules is such that the systems are fundamentally robust. Secondly, the Fuzzy Logic controller (FLC used earlier was optimized with PSO so as to obtain optimal adjustment of the membership functions only. Finally, the FLC is completely optimized by Swarm Intelligence Algorithms. Digital simulation results demonstrate that in comparison with the FLC the designed FLC-PSO speed controller obtains better dynamic behavior and superior performance of the DC motor, as well as perfect speed tracking with no overshoot.
Sensorless Load Torque Estimation and Passivity Based Control of Buck Converter Fed DC Motor
Directory of Open Access Journals (Sweden)
S. Ganesh Kumar
2015-01-01
Full Text Available Passivity based control of DC motor in sensorless configuration is proposed in this paper. Exact tracking error dynamics passive output feedback control is used for stabilizing the speed of Buck converter fed DC motor under various load torques such as constant type, fan type, propeller type, and unknown load torques. Under load conditions, sensorless online algebraic approach is proposed, and it is compared with sensorless reduced order observer approach. The former produces better response in estimating the load torque. Sensitivity analysis is also performed to select the appropriate control variables. Simulation and experimental results fully confirm the superiority of the proposed approach suggested in this paper.
Optimal PID control of a brushless DC motor using PSO and BF techniques
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H.E.A. Ibrahim
2014-06-01
Full Text Available This paper presents a Particle Swarm Optimization (PSO technique and bacterial foraging (BF technique for determining the optimal parameters of (PID controller for speed control of a brushless DC motor (BLDC where the (BLDC motor is modeled in simulink in Matlab. The proposed technique was more efficient in improving the step response characteristics as well as reducing the steady-state error, rise time, settling time and maximum overshoot.
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.
Design and use of brushless dc motor without detent torque
Wavre, N.
1990-03-01
Two applications of motors which cannot accept a residual detent torque due to the rotor magnets are presented. The first application concerns the joint mechanism of the Synchronous Meteorological Satellite/HERA project. The brushless torque motor drives a reversible harmonic drive with a high gear ratio of 500. The motor is designed to produce a stall torque of 3.0 Nm with a total imput power of 30 W for a total weight of 1.5 kg, with a no load speed of 500 rpm. The second application concerns the driving mechanism of an infrared sensor. The need to take all geometrical and magnetic parameters into consideration in designing space mechanisms is stressed.
Development of High-Temperature Superconducting DC Motor for Automobiles
Oyama, Hitoshi; Shinzato, Tsuyoshi
In recent years, electrification of automobiles is in progress. Following the advent of passenger electric vehicles, large size commercial vehicles with electric drive are also being developed. One of the problems in the development of large electric vehicles is the heavy weight which leads to short driving distances. Energy saving by the use of high-efficiency motors will be a solution. The authors have developed a prototype electric vehicle equipped with a high-temperature superconducting (HTS) motor and a refrigerator. The test results showed that the motor has torque of 136 Nm and an output of 30 kW, and the prototype vehicle obtains the maximum speed of 80 km/h.
Controlling the Dc-link Midpoint Potential in a Six-phase Motor-drive
DEFF Research Database (Denmark)
Bendixen, Flemming Buus; Blaabjerg, Frede; Rasmussen, Peter Omand;
2004-01-01
Traditionally electrical motors have three phases, but multiphase motors have shown to improve motor performance and efficiency. This paper concentrates about the control algorithm for a six-phase induction motor with third harmonic current injection. The problem is that typically a seventh...... inverter branch and filter inductances is needed for stabilizing the midpoint potential of the series connected dc-capacitor link. A new control strategy that pre-calculates the allowed voltage ripple and controls the motor voltage accordingly (using two standard three phase inverter modules) is suggested....... With this new control strategy the seventh branch and an inductance can be saved. It also opens the possibility to use two standard three-phase inverters to supply the six-phase motor. An experimental setup is build and the theory is verified in the test case. The proposed control strategy works satisfactory...
Low-Cost Undergraduate Control Systems Experiments Using Microcontroller-Based Control of a DC Motor
Gunasekaran, M.; Potluri, R.
2012-01-01
This paper presents low-cost experiments for a control systems laboratory module that is worth one and a third credits. The experiments are organized around the microcontroller-based control of a permanent magnet dc motor. The experimental setups were built in-house. Except for the operating system, the software used is primarily freeware or free…
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.
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
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.
Comparison Of Selected Characteristics Of Brushless DC Motors For Optoelectronic Sensors Positioning
Directory of Open Access Journals (Sweden)
Zieleźnicki Jan
2015-08-01
Full Text Available Thanks to their advantageous properties such as higher durability, reliability and wide scope of speed achievable with a given load, brushless DC motors are often used in Line-of-Sight stabilization systems of the optoelectronic aircraft gimbals. Since there are many sub-types and configurations of such motors, choosing the optimal structure is not a trivial issue. This paper presents the selection process of a motor with properties that would make it ideal for use in an optoelectronic gimbal drive.
DC Motor and Generalized DC Motor Attributed to Self-Controlling Frequency%自控变频为属性的直流电动机及广义直流电动机
Institute of Scientific and Technical Information of China (English)
童钟良
2014-01-01
The self-control behavior is the basic character of DC motor and generalized DC motor. The generalized DC motor is the new development of DC motor. The attribute of a DC motor may be reflected by self-controlled frequency. The measure of self-controlled frequency is also applied in the motor body of generalized DC motor. By mathematical deduction, it was explained that there was non-existence of the self-control behavior for synchronous motor in running. The motor system which is composed of motor body and self-controlled attachment is able to carry out self-control to the frequency and phases of the armature current, so that the performance of DC motor appears in generalized DC motor.%自控行为是直流电动机及广义直流电动机的基本特征。广义直流电动机是直流电动机的同类型电机，也是直流电动机的新发展。自控变频反映直流电动机的属性，广义直流电动机是对电机本体采取自控变频措施的电动机。依托数学推理阐明了同步电动机本无自控行为，以电机本体为主件与自控电气配件组成的机电一体化电机，对电枢电流的频率及相位实施自控，从而产生气隙磁场钳位，使广义直流电动机呈直流电动机的性能特征。
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.
Imitation of the characteristics of the wind turbine based on DC motor
Institute of Scientific and Technical Information of China (English)
LIU Qihui; HE Yikang; ZHAO Rende
2007-01-01
This paper analyzed the operating principles and power and torque characteristics of the wind turbine and the direct current motor(DC motor),and investigated the operating characteristics of the wind turbine compared to that of the DC motor.The torque imitation scheme,which has good performance and high feasibility,together with the whole wind turbine imitation system,was provided.The wind turbine imitation system includes not only a hardware platform composed of PC,data-collection board and thyristor-based velocity-regulator,but also monitor software of wind turbine imitation.The experimental results of different occasions verify the correctness and feasibility of the wind turbine imitation scheme proposed in this paper,which provided a valid idea for wind turbine imitation and investigation of wind power generation techniques in the laboratory.
Particle and Kalman filtering for state estimation and control of DC motors.
Rigatos, Gerasimos G
2009-01-01
State estimation is a major problem in industrial systems. To this end, Gaussian and nonparametric filters have been developed. In this paper the Kalman Filter, which assumes Gaussian measurement noise, is compared to the Particle Filter, which does not make any assumption on the measurement noise distribution. As a case study the estimation of the state vector of a DC motor is used. The reconstructed state vector is used in a feedback control loop to generate the control input of the DC motor. In simulation tests it was observed that for a large number of particles the Particle Filter could succeed in accurately estimating the motor's state vector, but at the same time it required higher computational effort.
Unbalanced Magnetic Force Calculation in Brushless DC Motors
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Z. Valipoor
2015-03-01
Full Text Available In this paper, an analytical method to calculate the unbalance magnetic pull forces (UMP due to the eccentricity of the rotor with considering the slots impact, is presented. Unbalanced magnetic pull is important because it affects the wear on the bearings as well as noise and vibration. The results of the analytical method, using finite element analysis for a prototype motor, were valid. Some force harmonics have the potential to produce noise and vibration. In order to detect harmonics of unbalance magnet forces, Depending on the fault frequency, the stator currents and spectrum of the vibrations have been analyzed
Magnetic Circuit & Torque Analysis Of Brushless DC Motor
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Arif J. Abbas
2013-05-01
Full Text Available This work is concerned with magnetic and torque analysis of BLDCM and with development of a method of designing BLDCM that have symmetric winding on the rotor .make significant contribution to the rotor inductance position difficult. It is also show that the prediction detent torque can be extremely sensitive to the permanent magnet by altering magnet arc width. Finally, simple lumped models that allow one to predict motor performance and characteristics as a function of main dimension, magnet residual flux density and phase current are developed. These models are used as a basis for an approach to designing BLDCM
Characterization and enhancement of micro brushless DC motor response
Conroy, Joseph; Kehlenbeck, Andrew; Humbert, J. Sean; Nothwang, William
2014-06-01
Commercially available speed controllers, motors, and propellers typically comprise the powertrains of many micro aerial robotic systems, such as quadrotor vehicles. As on board state sensing and processing improves, actuation bandwidth is becoming a significant bottleneck that limits the performance of the entire closed loop system. The performance of the commercial products can be greatly enhanced through the implementation of classical control methods directly at the powertrain level. In this paper, reduced order open loop models for three representative commercially available powertrains were estimated and were compared with closed loop equivalents. Further performance improvement is realized by the addition of a static inverse to mitigate the steady state structured uncertainty of the system.
Identification of the parameters of a DC motor state space model
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Momir Ranislav Stanković
2013-06-01
Full Text Available A method for the identification of the DC state space model parameters based on the minimization of the error function using the least squares method is described in this paper. The algorithm is practically applied in the laboratory environment on an industrial DC motor. The verification of the results was performed by comparing the characteristic signals of real and modeled systems. The results show that the quality of the identification is satisfactory. Introduction The identification of system parameters is the first step in the analysis and synthesis of control systems. Identification Quality strongly impacts on the results of all other computations. In the theory of automatic control, many methods of identification are developed. Which method will be applied depends on the characteristics of the system. In this paper, we described an identification algorithm based on the least squares method. A practical test of this algorithm of estimation is done on a DC motor. parameter estimation with the least squares method A DC motor is a second-order system described with two differential equations: one which describes electrical and one which describes mechanical parts of the motor. The idea is to analyse the motor as two first-order systems. The main signals are responses of two first order sub-systems on appropriate inputs. Using a discrete state-space model of the motor and applying the least square method on the recorded signals, we get straightforward equations for the computation of all the necessary parameters: Rr, Lr , Je , Fe , Kme and Kem (Eykhoff, Wilsoons, 1974. Experimental results The practical application was realized in the laboratory where a DC middle-power motor was used as a control object. It is coupled with a DC generator which serves as a load. Generation of the input signals and measure of the responses were performed with the acquisition system based on the appropriate acquisition card and the MATLAB
Kodama, Shinya; Hori, Yoichi
It is well-known that the separately-excited DC motor has effective torque (current) reduction characteristics in response to rapid increase in the rotational speed of the motor. These characteristics have been utilized in adhesion control of electric railway trains with separately-excited DC motor. Up to now, we have proposed a new skid prevention method for EVs, utilizing these characteristics and have made experiments with the hardware skid simulator “Motor-Generator setup”. In this paper, we applied this skid prevention control to our new vehicle “UOT CADWELL EV" equipped with BLDC motors and showed its effectiveness.
Institute of Scientific and Technical Information of China (English)
张琪; 谢国栋; 黄苏融
2006-01-01
Short circuit due to the brushes over the commutator segments of DC machines causes reduction in the armature resistance and flux linkage, which is especially meaningful when the electric machine is running at zero or extremely low speed. In design computation of DC machines, usually the average values of the coefficients are used in consideration of the effects of the short circuit.However, the average values have complicated relationships with the parameters of electric machines, therefore, no usable mathematical model has been established yet for precise computation. In this paper, a relatively simple and generalized method for precise computation of the average values of the short-circuit coefficients is proposed. This method decouples some of the machine parameters and, therefore establishes a highly parameterized mathematical model and is convenient in formulation for computation. In addition, the computation data for one and two brush pairs, which are the most common cases, is provided.
Peng, Jinzhu; Dubay, Rickey
2011-10-01
In this paper, an adaptive control approach based on the neural networks is presented to control a DC motor system with dead-zone characteristics (DZC), where two neural networks are proposed to formulate the traditional identification and control approaches. First, a Wiener-type neural network (WNN) is proposed to identify the motor DZC, which formulates the Wiener model with a linear dynamic block in cascade with a nonlinear static gain. Second, a feedforward neural network is proposed to formulate the traditional PID controller, termed as PID-type neural network (PIDNN), which is then used to control and compensate for the DZC. In this way, the DC motor system with DZC is identified by the WNN identifier, which provides model information to the PIDNN controller in order to make it adaptive. Back-propagation algorithms are used to train both neural networks. Also, stability and convergence analysis are conducted using the Lyapunov theorem. Finally, experiments on the DC motor system demonstrated accurate identification and good compensation for dead-zone with improved control performance over the conventional PID control.
Muscle emulation with DC motor and neural networks for biped robots.
Serhan, Hayssam; Nasr, Chaiban G; Henaff, Patrick
2010-08-01
This paper shows how to use a DC motor and its PID controller, to behave analogously to a muscle. A model of the muscle that has been learned by a NNARX (Neural Network Auto Regressive eXogenous) structure is used. The PID parameters are tuned by an MLP Network with a special indirect online learning algorithm. The calculation of the learning algorithm is performed based on a mathematical equation of the DC motor or with a Neural Network identification of the motor. For each of the two algorithms, the output of the muscle model is used as a reference for the DC motor control loop. The results show that we succeeded in forcing the physical system to behave in the same way as the muscle model with acceptable margin of error. An implementation in the knees of a simulated biped robot is realized. Simulation compares articular trajectories with and without the muscle emulator and shows that with muscle emulator, articular trajectories become closer to the human being ones and that total power consumption is reduced.
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.
Optimization and Verification of a Brushless DC-Motor for Cryogenic Mechanisms
Eggens, M.; van Loon, D.; Smit, H. P.; Jellema, W.; Dieleman, P.; Detrain, A.; Stokroos, M.; Nieuwenhuizen, A. C. T.
2013-09-01
In this paper we report on the results of the investigation on the feasibility of a cryogenic motor for a Filter Wheel Mechanism (FWM) for the instrument SpicA FAR-infrared Instrument (SAFARI). The maximum allowed dissipation of 1 mW is a key requirement, as a result of the limited cooling resources of the satellite. Therefore a quasi 3D electromagnetic (EM) model of a Brushless DC (BLDC) motor has been developed. To withstand the severe launch loads a mechanical concept has been designed to limit the friction torque in the bearings. The model was verified by room temperature and cryogenic measurements on an existing motor from the test setup. The model shows that the proposed BLDC motor design fulfills the requirements.
Directory of Open Access Journals (Sweden)
Diao Xiaoyan
2016-01-01
Full Text Available To solve the deficiencies of long optimization time and poor precision existing in conventional bacterial foraging algorithm (BFA in the process of parameter optimization, an improved bacterial foraging algorithm (IBFA is proposed and applied to speed and displacement control system of bearingless brushless DC (Bearingless BLDC motors. To begin with the fundamental principle of BFA, the proposed method is introduced and the individual intelligence is efficiently used in the process of parameter optimization, and then the working principle of bearingless BLDC motors is expounded. Finally, modeling and simulation of the speed and displacement control system of bearingless BLDC motors based on the IBFA are carried out by taking the software of MATLAB/Simulink as a platform. Simulation results show that, speed overshoot, torque ripple and rotor position oscillation are dramatically reduced, thus the proposed method has good application prospects in the field of bearingless motors.
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.
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.
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.
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.
Estimation parameters and black box model of a brushless DC motor
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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.
Numerical analysis of the electromechanically coupled magnetic field in brushless DC motors
Jang, G. H.; Chang, J. H.
2001-05-01
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.
Numerical analysis of the electromechanically coupled magnetic field in brushless DC motors
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Jang, G.H. E-mail: ghjang@email.hanyang.ac.kr; Chang, J.H
2001-05-01
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.
POSITION CONTROL OF BRUSHLESS DC MOTOR BASED ON DIGITAL SIGNAL PROCESSING
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Çetin GENÇER
2006-01-01
Full Text Available Brushless DC Motors (BLDC have been used widely high performance control systems which are depended on to development of power electronic and control technology. In these motors to fed commutated supply, the control of position without oscilation has been required. In this study, position control of BLDC with digital signal processing has been implemented by a proportional-derivative (PD controller because of its simple structure. It has been seen that the controller which is proposed from simulation and experimental studies, has a quick dynamic responce with nonoscillation.
Novel Position and Speed Estimator for PM Single Phase Brushless D.C. Motor Drives
DEFF Research Database (Denmark)
Lepure, Liviu I.; Andreescu, Gheorghe-Daniel; Iles, Doris;
2010-01-01
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...
Adaptive Quasi-Sliding Mode Control for Permanent Magnet DC Motor
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Fredy E. Hoyos
2013-01-01
Full Text Available The motor speed of a buck power converter and DC motor coupled system is controlled by means of a quasi-sliding scheme. The fixed point inducting control technique and the zero average dynamics strategy are used in the controller design. To estimate the load and friction torques an online estimator, computed by the least mean squares method, is used. The control scheme is tested in a rapid control prototyping system which is based on digital signal processing for a dSPACE platform. The closed loop system exhibits adequate performance, and experimental and simulation results match.
Modelling of a Serial Wound DC Motor Supplied by a Semi-Controlled Rectifier
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Pavel Zaskalicky
2006-01-01
Full Text Available A serial wound DC motor is one of most used electrical machines in a small electrical instruments and home equipments by reason, that its speed is easily controlled by a supply voltage. Suppose that the motor is supplied by a semicontrolled rectifier and operate in open circuit loop. After representing of the mathematical model, a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of the rotor is determined as a function of the magnetic core saturation and of the armature reaction.
Comparison between Conventional and Fuzzy Logic PID Controllers for Controlling DC Motors
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Essam Natsheh
2010-09-01
Full Text Available Fuzzy logic and proportional-integral-derivative (PID controllers are compared for use in direct current (DC motors positioning system. A simulation study of the PID position controller for the armature-controlled with fixed field and field controlled with fixed armature current DC motors is performed. Fuzzy rules and the inferencing mechanism of the fuzzy logic controller (FLC are evaluated by using conventional rule-lookup tables that encode the control knowledge in a rules form. The performance assessment of the studied position controllers is based on transient response and error integral criteria. The results obtained from the FLC are not only superior in the rise time, speed fluctuations, and percent overshoot but also much better in the controller output signal structure, which is much remarkable in terms of the hardware implementation.
Genetic Design of an Interval Type-2 Fuzzy Controller for Velocity Regulation in a DC Motor
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Yazmin Maldonado
2012-11-01
Full Text Available This paper proposes the design of a Type‐2 Fuzzy Logic Controller (T2‐FLC using Genetic Algorithms (GAs. The T2‐FLC was tested with different levels of uncertainty to regulate velocity in a Direct Current (DC motor. The T2‐FLC was synthesized in Very High Description Language (VHDL code for a Field‐programmable Gate Array (FPGA, using the Xilinx System Generator (XSG of Xilinx ISE and Matlab‐Simulink. Comparisons were made between the Type‐1 Fuzzy Logic Controller and the T2‐FLC in VHDL code and a Proportional Integral Differential (PID Controller so as to regulate the velocity of a DC motor and evaluate the difference in performance of the three types of controllers, using the t‐student test statistic.
Ramesh, K; Nirmalkumar, A; Gurusamy, G
2010-01-01
In this paper, design of current controller for a two quadrant DC motor drive was proposed with the help of model order reduction technique. The calculation of current controller gain with some approximations in the conventional design process is replaced by proposed model order reduction method. The model order reduction technique proposed in this paper gives the better controller gain value for the DC motor drive. The proposed model order reduction method is a mixed method, where the numerator polynomial of reduced order model is obtained by using stability equation method and the denominator polynomial is obtained by using some approximation technique preceded in this paper. The designed controllers responses were simulated with the help of MATLAB to show the validity of the proposed method.
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Hadeed A. Sher
2017-04-01
Full Text Available In this paper theoretical and experimental analysis of an AC–DC–AC inverter under DC link capacitor failure is presented. The failure study conducted for this paper is the open circuit of the DC link capacitor. The presented analysis incorporates the results for both single and three phase AC input. It has been observed that the higher ripple frequency provides better ride through capability for this fault. Furthermore, the effects of this fault on electrical characteristics of AC–DC–AC inverter and mechanical properties of the induction motor are also presented. Moreover, the effect of pulsating torque as a result of an open circuited DC link capacitor is also taken into consideration. Theoretical analysis is supported by computer aided simulation as well as with a real time experimental prototype.
Analysis of a Permanent-Magnet Brushless DC Motor with Fixed Dimensions
Brakanskis, Uldis; Dirba, Janis; Kukjane, Ludmila; Drava, Viesturs
2010-01-01
The purpose of this paper is to describe the analysis of a permanent-magnet brushless DC motor with fixed outer diameter and active zone length. The influence of air gap, material of permanent magnets and their size on the magnetic flux density of the machine and magnetic flux is analyzed. The work presents the calculations of two programs, the comparison of the results and the most suitable combination of factors that has been found.
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Fredy Edimer Hoyos Velasco
2010-10-01
Full Text Available Virtually every engineering development for control systems is tested by simulation to predict performance. However, the final use of an algorithm is in its application in a real time system. Development tools using a DSP and Simulink RTW can be performed with real-time simulations (i.e. simulation interacting with physical plant. Testing the speed control loop of a DC motor with permanent magnets has thus been developed to appreciate the considerable advantages offered by these tools.
Control System of Sensorless Brushless DC Motor Based on TMS320F240
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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.
Steady-state analysis of PV supplied separately excited DC motor fed from IDB converter
Energy Technology Data Exchange (ETDEWEB)
Senjyu, Tomonobu; Veerachary, Mummadi; Uezato, Katsumi [Department of Electrical and Electronics Engineering, Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Nakagami, Okinawa (Japan)
2002-03-01
Interleaved dual boost converter is capable of extracting more amount of power from the photovoltaic source than the conventional boost converter. Power extraction capabilities of the conventional boost and interleaved dual boost converters from the photovoltaic array are verified through experimental studies. As an application the effectiveness of this interleaved dual boost converter for PV supplied separately excited DC motor is studied through simulation. Extensive studies are made by formulating the mathematical models for photovoltaic source, interleaved dual boost converter, DC motor and load. Steady-state performance of the motor coupled to centrifugal pump load is analyzed for maximum power, gross mechanical energy operations. From the simulation studies, it is found that the motor performance is improved with gross mechanical energy output operation as compared to maximum power operation of solar cell array. Furthermore, the use of interleaved dual boost converter reduces the ripple content both in the source and load waveforms, thus resulting in reduced filtering requirements and improved photovoltaic array performance.
Start Up Current Control of Buck-Boost Convertor-Fed Serial DC Motor
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Yusuf SÖNMEZ
2009-02-01
Full Text Available Generally, DC motors are given preference for industrial applications such as electric locomotives, cranes, goods lifts. Because of they have high starting moment; they initially start with high current. This high start-up current must be decreased since it may damage windings of the motor and increases power consumption. It could be controlled by an appropriate driver system and controller. The nature of fuzzy logic control has adaptive characteristics that can achieve robust response to a system with uncertainty, parameter variation, and load disturbance. In this paper, fuzzy logic based control of start-up current of a Buck-Boost Converter fed serial DC motor is examined through computer simulation. In order to see the advantages of fuzzy logic control, classical PI control has applied to the same motor, under same circumstances and has been compared. C++ Builder software has been used for the simulation. According to the simulation results, plainly, fuzzy logic control has stronger responses than classical PI control and uses lower current at starting moment.
A Modified High-Efficient Step-Up Sepic for DC Motor Drives
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P. Dhanasekaran
2013-12-01
Full Text Available In this paper, Single-Ended Primary Inductor Converter (SEPIC fed DC motor is proposed. Soft-switching technique such as Zero-Voltage-Switching (ZVS and Zero-Current-Switching (ZCS operation plays a vital role in high voltage applications. Zero-Current-Switching (ZCS operation achieved due to resonance between the resonant inductor and the capacitor by using output diode and its reverse-recovery loss is subsequently reduced. Zero-Voltage-Switching (ZVS operation is achieved by using coupled inductor and auxiliary inductor. The model has been simulated through MATLAB/SIMULINK using Diode Bridge, SEPIC topology and closed loop DC motor load and it is modeled analytically. The proposed system is modeled with input side Diode Bridge Rectifier and SEPIC Topology with Proportional Integral (PI controller. The soft switching scheme for the proposed topology is developed with closed loop motor load. The motor voltage is achieved twice the rated voltage. The results are generated in MATLAB/SIMULINK and are shown.
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
Effect of design variables on irreversible magnet demagnetization in brushless dc motor
Kim, Tae Heoung; Lee, Ju
2005-05-01
The large demagnetizing currents in brushless dc (BLdc) motor are generated by the short-circuited stator windings and the fault of a drive circuit. So, irreversible magnet demagnetization occurs due to the external demagnetizing field by these currents. In this paper, we deal with the effect of design variables on irreversible magnet demagnetization in BLdc motor through the modeling approach using a two-dimensional finite-element method (2D FEM). The nonlinear analysis of a permanent magnet is added to 2D FEM to consider irreversible demagnetization. As a result, it is shown that magnet thickness, teeth surface width, and rotor back yoke thickness are the most important geometrical dimensions of BLdc motor in terms of irreversible magnet demagnetization.
Electromagnetic Flux Analysis of Permanent Magnet Brushless DC Motor Using Magnet Software
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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.
APPLICATION FEATURES OF FUZZY CONTROLLERS ON EXAMPLE OF DC MOTOR SPEED CONTROL
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G. L. Demidova
2016-09-01
Full Text Available A prerequisite for the use of intelligent control methods, including algorithms of fuzzy logic, is increasing complexity in all industries, especially when parameters of technical systems while in operation vary in wide range. The paper provides comparative analysis of the basic types of common fuzzy direct action controllers on the example of speed control system in the DC motor drive. Design features of these types of fuzzy controllers are shown. Their comparison with traditional PI controller is carried out through the use of simulation, including the conditions of uncertainty expressed in changing of equivalent moment of inertia of the motor shaft. As a result, the conclusion about the feasibility of fuzzy PID-type controller application is made. The features of fuzzy controllers outlined in the paper can be summarized to more complex motor drive systems and to other non-linear systems that require the maintenance of any parameter within a given range.
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.
Vos, de W.M.; Kleijn, J.M.; Keizer, de A.; Cosgrove, T.; Cohen Stuart, M.A.
2010-01-01
A polymer brush can be defined as a dense array of polymers end-attached to an interface that stretch out into the surrounding medium. Polymer brushes have been investigated for the past 30 years and have shown to be an extremely useful tool to control interfacial properties. This review is intended
Brushless DC Motor Drive during Speed Regulation with Artificial Neural Network Controller
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Sakshi Solanki
2016-06-01
Full Text Available Brushless DC motor, at this moment is extensively used being many industrial functions due to the different features like high efficiency and dynamic response and high speed range. This paper is proposing a technology named as Artificial Neural Network controller to control the speed of the brushless DC motor. Here the paper contributes an analysis of performance Artificial Neural Network controller. Because it is difficult to handle by the use of conventional PID controller as BLDC drive is a nonlinear. Through PID controller, the speed regulation of BLDC is not efficient and reliable as PID controller cannot operate the large data, results it gives different variation in BLDC motor control. The ANN easily trains the data of large amount by NN toolbox. As ANN controller has the strength to indulge characteristics of control and it is accessible to operate the huge amount of data as like human can store in a mind. The empirical results prove that an ANN controller can better control the act than the PID controller. The modelling, control and the simulation of the BLDCM get done by applying MATLAB/SIMULINK software kit.
Optimization of PID Controller for Brushless DC Motor by using Bio-inspired Algorithms
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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.
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.
Advanced axial field D.C. motor development for electric passenger vehicle
Jones, W. J.
1982-01-01
A wound-field axial-flux dc motor was developed for an electric vehicle drive system. The motor is essentially an axial-flux version of the classical Gramme-ring winding motor, but the active conductors are recessed into slots cut into the two opposite faces of the laminated tape-wound core ring. Three motors were built and tested in the program. The second (functional) model was a six-pole machine which weighed 88.5 kg. It developed 16.9 km (33.0 hp), and a max speed of 4800 rpm. Full load efficiency was 92% and predicted SAE D-cycle efficiency was 88%. The last engineering) model was a 4-pole machine with compoles, allowing a weight reduction to 45 kg (100 lbs.) while addressing some manufacturability problems. The engineering model was rated at 13.2 kw (17.6 hp) at 3000 rpm, with a peak power of 19.8 km (26.4 hp) and a max speed of 7200 rpm. Initial test results on this motor showed poor commutation and efficiency; the program was terminated without resolution of these problems.
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.
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 New Energy Optimal Control Scheme for a Separately Excited DC Motor Based Incremental Motion Drive
Institute of Scientific and Technical Information of China (English)
Milan A.Sheta; Vivek Agarwal; Paluri S.V.Nataraj
2009-01-01
This paper considers minimization of resistive and frictional power dissipation in a separately excited DC motor based incremental motion drive (IMD). The drive is required to displace a given, fixed load through a definite angle in specified time, with minimum energy dissipation in the motor windings and minimum frictional losses. Accordingly, an energy optimal (EO) control strategy is proposed in which the motor is first accelerated to track a specific speed profile for a pre-determined optimal time period. Thereafter, both armature and field power supplies are disconnected, and the motor decelerates and comes to a halt at the desired displacement point in the desired total displacement time. The optimal time period for the initial acceleration phase is computed so that the motor stores just enough energy to decelerate to the final position at the specified displacement time. The parameters, such as the moment of inertia and coefficient of friction, which depend on the load and other external conditions, have been obtained using system identification method. Comparison with earlier control techniques is included. The results show that the proposed EO control strategy results in significant reduction of energy loases compared to the existing ones.
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Muhammad Taufiq Ramadhan
2015-03-01
Full Text Available Penggunaan mobil listrik secara umum terkendala pada beban, kecepatan aktual, serta efisiensi energi. Pemanfaatan Fuzzy Logic Controller untuk pengaturan kecepatan motor DC pada mobil listrik diperlukan untuk meraih kecepatan aktual yang lebih presisi sehingga diperoleh efisiensi energi. Selain itu perlu juga menggunakan Bidirectional Buck-Boost Cascade Converter untuk pengaturan motor DC secara bidirectional, yakni pengaturan saat motoring dan saat pengereman regeneratif (regenerative braking. Hal ini berdasar pada energi yang terbuang percuma, baik itu rugi elektris maupun rugi mekanis saat pengereman.
DESINGING OF ANN BASED SPEED CONTROLLER FOR PHASE CONTROLLED DC MOTOR
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MR. M.V.SUDARSAN
2011-07-01
Full Text Available For electrical drives good dynamic performance is mandatory so as to respond to the changes in command speed and torques, so various speed control techniques are being used for real time applications. The speed of a dc motor can be controlled using various controllers like PI- Controller, Artificial Neural Network (ANNcontroller. ANN theory is recently getting increasing emphasis in process control applications. The paper describes application of ANN in a speed control system that uses a phase-controlled bridge converter and aseparately excited DC machine. The ANN controller for current and speed loops are implemented in MATLAB/SIMULINK, replacing the conventional Proportional-Integral (PI control method. The simulationstudy indicates the superiority of artificial neural network control over the conventional control methods. This control seems to have a lot of promise in the applications of power electronics.
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...... and to reduce the sensitivity to accuracy of flux linkage estimation. An I-f strategy is used for starting, by prescribing a ramped reference frequency and a constant current, and then the seamless transition to close loop sensorless control takes place. The proposed control system is detailed and validated...
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.
Influence of the permanent magnet overhang on the performance of the brushless dc motor
Wang, J. P.; Lieu, D. K.; Lorimer, W. L.; Hartman, A.
1998-06-01
Axial overhang of the permanent magnets has been used to enhance the performance of radial flux brushless dc motors, but its precise contribution to performance is not well known. This article aims at the investigation of the overhang effects by finite element and lumped parameter modeling. An empirical formula which allows two-dimensional analysis to account for overhang effects is proposed. A three-dimensional equivalent magnetic circuit model is developed and its ability to accurately predict overhang effects is assessed. Results of finite element and lumped parameter models are compared and a design methodology is forwarded.
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.
Design of Fuzzy PID controller to control DC motor with zero overshoot
Directory of Open Access Journals (Sweden)
Meenakshi Chourasiya
2014-10-01
Full Text Available Most of the real time operation based physical system, digital PID is used in field such as servo-motor/dc motor/temperature control system, robotics, power electronics etc. need to interface with high speed constraints, higher density PLD’s such as FPGA used to integrate several logics on single IC. There are some limitations in it to overcome these limitations Fuzzy logic is introduced with PID and Fuzzy PID is formed. This paper explains experimental design of Fuzzy PID controller. We aimed to make controller power efficient, more compact, and zero overshoot. MATLAB is used to design PID controller to calculate and plot the time response of the control system and Simulink to generate a set of coefficients.
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.
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...
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.
Directory of Open Access Journals (Sweden)
Ibrahim Al-Abbas
2012-01-01
Full Text Available The cascade control of DC motors by PI controllers was extensively used in industry. Approximation rules based on plotting the output of the system or on computer simulation were used to determine the parameters of these controllers. This study was done to develop mathematical expressions to calculate the parameters of these controllers. Output time functions of the system and there derivatives were used to obtain mathematical relationships relating directly the motor parameters and the controller parameters. These relationships were used in tuning process of the cascade system. The dynamic performances of the system were examined in single loop form and in closed loop form for a step change in control variable (the input voltage as well as for step change in disturbance (mechanical load. The performances of current closed loop system and the speed closed loop were acceptable. The steady state error was zero and the maximum overshoot was less than 20%. The developed relationships can be used in design and analysis of cascade DC drive systems and cascade AC drive systems.
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.
Analysis of the Photoelectric DC motor%光电式直流电机的分析研究
Institute of Scientific and Technical Information of China (English)
刘燕; 赵楠; 李平舟
2012-01-01
光电式直流电机的运行速度控制精度高、误差较小。其产生的电磁干扰无法传递到控制系统中，使电机运行更加稳定，因此研究光电式直流电机的意义非常重大。本文介绍了光电耦合器的原理及作用、直流电机的工作原理以及测量光电式直流电机速度的方法及并分析总结影响电机速度的主要因素。% Photoelectric DC motor speed control is of high precision, little error. The generated electromagnetic interference can not be transmitted to the control system, the motor can run more stable, so the study of photoelectric DC motor is very important. This paper introduces the principle and function of photoelectric coupler, DC motor and the principle of measuring photoelectric DC motor speed method and summarized analysis of the main factors influencing the speed of the motor.
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.
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。
Institute of Scientific and Technical Information of China (English)
张琪; 谢国栋; 黄苏融
2008-01-01
When a direct-current (DC) machine runs at extremely low speed or standstill, the reduction in the armature resistance and the armature flux linkage due to the short circuited coils by the brushes on the commutator should not be neglected. Taking this reduction effect into account, the average values of the reduction coefficients relate to the machine parameters in complicated forms. In this paper, an effective algorithm for the precise computation of the average values of these reduction coefficients is proposed. Furthermore, in the algorithm, the effect of the insulation thickness between the commutator segments and the multiplicity of the wave winding are considered for the first time. The proposed algorithm can also be accommodated into the computer-aided design (CAD) of a DC machine, which normally runs at extremely low speed or standstill.
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)
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.
Djemaï, M.; Busawon, K.; Benmansour, K.; Marouf, A.
2011-11-01
In this article, we present a high-order sliding mode controller of a DC motor drive connected to a multi-cellular converter. More specifically, we design a second-order (super-twisting) control algorithm for the speed regulation of a DC motor. For this, a switching control for the multi-cellular converter is derived in order to supply the correct reference value for the speed regulation. A practical implementation of the controller is realised using a laboratory set-up. The performance and the validity of the controller are shown experimentally.
直流电动机故障诊断及维护%Fault diagnosis and maintenance of DC motor
Institute of Scientific and Technical Information of China (English)
邓朕纪
2016-01-01
Through the analysis of the common faults of the DC motor of the rolling mill, the solution of the common fault is put forward,which has certain promotion effect on the judgment of the fault of the DC motor and the daily maintenance.%通过对轧钢飞剪直流电动机的常见故障分析，提出了一般故障的解决方案，对直流电机故障的判断及日常维护具有一定的推广作用。
Lee, Kab-Jae; Kim, Sol; Lee, Ju; Oh, Jae-Eung
2003-05-01
A brushless dc (BLDC) motor, which has a permanent magnet (PM) component, is a potential candidate for hybrid or electric vehicle applications. Minimizing the BLDC motor size is an important requirement for application. This requirement is usually satisfied by adopting a high performance permanent magnet or improved winding methods. The PM configuration is also a critical point in design. This article presents the effect of the PM configuration on motor performance, especially the maximum torque. Four representative BLDC motor types are analytically investigated under the condition that the volume of the PM and magnetic material is constant. An embedded interior permanent magnet motor has the best torque performance the maximum torque of which is more than 1.5 times larger than that of the surface mounted permanent magnet motor. The performance of back electromotive force, instantaneous torques is also investigated.
Electric motors for robotics; Moteurs electriques pour la robotique
Energy Technology Data Exchange (ETDEWEB)
Maye, P.
2001-07-01
Thanks to the recent progresses made in the domain of small motors and of their electronic control systems, the electrical actuators have become preponderant among the actuators used in robotics and automation. This book presents the knowledge necessary to deal with the domain of electric actuators. The three main types of motors encountered today are described with their characteristics: DC motors, brush-less DC motors and step-by-step motors. The mechanisms and their influence on the choice of a motor, the speed and position servo-controls and the overheating phenomena are detailed. An important part is devoted to the electronic circuits, responsible for a large part of the performances of actuators. Content: general considerations; principle and technology of DC motors; operation regimes; electronic power supplies; brush-less DC motors and their power supplies; step-by-step motors and their power supplies; servomechanisms; motors overheating; measurement of motors parameters; speed and position control; appendixes; dictionary, bibliography, index. (J.S.)
Adaptive Neuro-Fuzzy Controller Experimental Design for DC Motor Connected to Unbalanced Load
Directory of Open Access Journals (Sweden)
Reza Nejati
2007-09-01
Full Text Available In two recent decades, fuzzy controllers have been used in controlling different systems successfully. In this article, a new method is given for controlling of permanent magnetic DC motor connected to unbalanced load. Imbalance of load leads to machine vibrations, fluctuation of power, making exhaustion in machine shaft, and equipment depreciation. In this article neuro-fuzzy controllers are used for controlling unbalanced load. Because of non-linear nature of load and machine, machine fluctuations are different in various speeds. For making controller adaptive with machine, using an artificial neural network, the input-output coefficients are be updated in any speed. Optimized coefficients obtained by using of direct search method, and with these coefficients, artificial neural network trained with Lauvenberg-Marcoardet method. Operational results obtained from developed system, shows the efficiency of given method.
Speed Digital Control of Brushless DC Motor Using dsPIC Controller
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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.
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C. Subba Rami Reddy
2011-07-01
Full Text Available This paper introduces an Integrated fuzzy logic controller (IFLC for brushless dc (BLDC motor drives using advanced simulation model and presents a comparative study of performances of PID controller and IFLC. The dynamic characteristics of speed and torque are effectively monitored and analyzed using the proposed model. The aim of IFLC is to obtain improved performance in terms of disturbance rejection or parameter variation than obtained using PID controller. The IFLC is constructed by using Fuzzy logic controller (FLC and PID controller. A performance comparison of the controllers is also given based on the integral of the absolute value of the error (IAE, the integral of the squared error (ISE, the integral of the time-weighted absolute error (ITAE and the integral of the time-weighted squared error (ITSE. The results show the effectiveness of the proposed controller.
Dynamic Characteristic Analysis of Linear DC Motor by 3D EMCN Considering Input Voltage
Energy Technology Data Exchange (ETDEWEB)
Ha, Kyung Ho; Yeom, Sang Bu [Changwon National University, Changwon(Korea); Hong, JUNG Pyo; Hur Jin; Kang Do Hyunc [Hanyang University(Seoul Campus), Seoul(Korea)
2002-02-01
In order to design the Linear DC Motor (LDM) With improved characteristics, transient and steady state analysis are required. Furthermore, 3D analysis is also needed to analyze the precise characteristics like thrust, time harmonics. This paper deals with the transient and dynamic characteristic analysis if LDM by coupling of external circuit and motion equation using 3D Equivalent Magnetic Circuit Network Method (EMCN). For the three dimensional analysis of electric machine, EMCN is very effective method that ensures high accuracy similar to FEM and short computation time. Also, The modeling by EMCN easily allows the mover to move with respect to the Sartre at each time Also, and the spatial moving step is determined by the solution of the mechanical motion equation and the computed electromagnetic thrust. The results are compared with experimental ones to clarify the usefulness and verify the accuracy of the proposed method. (author). 11 refs., 20 figs., 2 tabs.
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.
Gwaltney, David A.; Ferguson, Michael I.
2003-01-01
Evolvable hardware provides the capability to evolve analog circuits to produce amplifier and filter functions. Conventional analog controller designs employ these same functions. Analog controllers for the control of the shaft speed of a DC motor are evolved on an evolvable hardware platform utilizing a second generation Field Programmable Transistor Array (FPTA2). The performance of an evolved controller is compared to that of a conventional proportional-integral (PI) controller. It is shown that hardware evolution is able to create a compact design that provides good performance, while using considerably less functional electronic components than the conventional design. Additionally, the use of hardware evolution to provide fault tolerance by reconfiguring the design is explored. Experimental results are presented showing that significant recovery of capability can be made in the face of damaging induced faults.
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.
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.
Abdul-Razzaq, Wathiq N.; Boehm, Manfred H.; Bushey, Ryan K.
2008-01-01
Introductory physics laboratories have been demonstrated in some instances to be difficult or uninteresting to students at the collegiate level. We have developed a laboratory that introduces the concept of the Lorentz force and allows students to build a non-traditional DC motor out of easily acquired materials. Basic electricity and magnetism…
The Design of DC Motor Speed Controller%直流电动机调速系统的设计
Institute of Scientific and Technical Information of China (English)
赵玉彬; 秦旭东; 潘险涛; 唐成佐
2001-01-01
文章论述了采用8031单片机作为控制器设计的直流电动机调速器的软、硬件结构。%In the paper the authors introduce the software and hardware composition of DC motor speed controllerwith 8031 single chip computer.
DEFF Research Database (Denmark)
Dal, Mehmet; Teodorescu, Remus
2011-01-01
simulations. To demonstrate the effectiveness of each method, several experiments were performed on a DSP-based PM DC motor drive system. Then, the newly proposed combinations of these methods were implemented. The hardware implementation results are comparatively presented and discussed....
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.
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.
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P. Karpagavalli
2013-01-01
Full Text Available This study presents the performance of a new four quadrant single phase DC drive closed loop system controlled by proportional integral and derivative controller with Pulse Width Modulation (PWM full bridge DC-DC converter using bipolar voltage switching. The proposed method is found to be more efficient in improving the step response characteristics such as reducing the settling time, rise time, steady state error and maximum overshoot in speed response of the closed loop DC motor drive and also reduced total harmonics distortion in the AC line current when compared to open loop system. The proposed topologies were simulated using MATLAB/Simulink software package and the results were obtained.
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Mohd Tariq
2016-05-01
Full Text Available Most of the Brushless DC (BLDC motors drive adopts proportional, integral and derivative (PID controller and pulse width modulation (PWM scheme for speed control. Hence, BLDC motor drive has strong saturation characteristics. The saturation results in a typical windup phenomenon. The paper presents an Antiwindup drive for BLDC motor. An Antiwindup controller (AWC has been used in the paper. AWC has been modeled in MATLAB/Simulink and comparison has been done between conventional PI controller and AWC at different starting loads. Dynamic characteristics of the BLDC motor drive have been examined and results are presented and discussed in detail in this paper. Details of DSP based experimental validation of the simulated results are also presented here.
Energy Technology Data Exchange (ETDEWEB)
Markadeh, Gholamreza Arab [Faculty of Engineering, Shahrekord University, Shahrekord (Iran, Islamic Republic of); Hajian, Masood, E-mail: m.hajian@ec.iut.ac.i [Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan (Iran, Islamic Republic of); Soltani, Jafar; Hosseinia, Saeed [Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan (Iran, Islamic Republic of)
2010-07-15
Field orientation control of induction machine (IM) drives is a well-known strategy which has a fast dynamic response. In this paper, the direct rotor flux field orientation control of speed sensorless IM drive is presented. A two level space vector modulation inverter is employed to generate the command stator voltage. In proposed control scheme, a maximum torque per ampere strategy is achieved using a so-called fast flux search method. Based on this method, for a given load torque and rotor speed, the magnitude of rotor reference flux is adjusted step by step until the effective value of stator current becomes minimized finally. In addition, using the IM fifth order model in the stationary reference frame, a nonlinear rotor flux observer is developed which is also capable of motor resistances and rotor speed simultaneously estimation. Moreover, a useful method is introduced for dc offset compensation which is a major problem of ac drives especially at low speeds. The proposed control idea is experimentally implemented in real time using a CPLD board synchronized with a personal computer. Simulation and experimental results are finally presented to confirm the validity and effectiveness of the proposed method.
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.
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...
Lee, C. J.; Jang, G. H.
2008-04-01
This paper investigates the distortion of magnetic field of a brushless dc (BLDC) motor due to deformed rubber magnet. Global or local deformation of rubber magnet in the BLDC motor is mathematically modeled by using the Fourier series. Distorted magnetic field is calculated by using the finite element method, and unbalanced magnetic force is calculated by using the Maxwell stress tensor. When the rubber magnet is globally or locally deformed, the unbalanced magnetic force has the frequencies with the first harmonic and the harmonics of slot number ±1. However, the harmonic deformation with multiple of common divisor of pole and slot does not generate unbalanced magnetic force due to the rotational symmetry.
Directory of Open Access Journals (Sweden)
Saswati Swapna Dash
2014-07-01
Full Text Available This paper presents an overall study of Feedback Control of Z-Source Converter Fed Separately excited DC motor with centrifugal Pump Set. Z-source converter can be used for both voltage buck and boost mode using LC impedance network. In this paper the dynamic modeling of Z-source with motor load and centrifugal pump set is carried out with new findings. The compensators for speed feedback loop are designed by taking average state space analysis and small signal model of the system. The feedback loop is designed by classical control methods. The experiment is done in MATLAB work environment and the result is verified by Simulation.
电机驱动器装配工艺技术%Assembly Technology of DC Motor Power Driver
Institute of Scientific and Technical Information of China (English)
衣伟; 毛书勤
2011-01-01
阐述了直流力矩电器驱动器的基本工作原理;给出了直流力矩电器驱动器的装配工艺流程,并对工艺流程中的重要环节做了较为详细的说明;总结了直流力矩电机驱动器的抗干扰措施及安装注意事项。%The fundamental principle of DC Motor Power Driver was stated.The assembly technology process of DC Motor Power Driver and the main technical parameters were given,and some of important factors were explained particularly.The anti-interference methods and matters needing attention were summarized.
Design of DC Motor Speed Control Based on Proteus Simulation%基于 Proteus 仿真的直流电机调速设计
Institute of Scientific and Technical Information of China (English)
欧阳明星; 张俊武; 江方涛
2016-01-01
in order to realize the accurate control of the smart car, analyzes the DC motor model and characteristics, discusses the method for DC motor speed regulation, in based on the analysis of the implementation principle of PWM DC motor speed, with the Proteus simulation software realize PWM speed control of DC motor.%为了实现智能小车的精确控制，分析了直流电机模型及其参数特性，讨论了直流电机调速方法，在分析PWM直流电机调速实现原理的基础上，借助Proteus仿真软件实现直流电机的PWM调速。
Main Drive Control System of Rotary Kiln DC Motor%回转窑直流电机主拖动控制系统
Institute of Scientific and Technical Information of China (English)
李慧春
2011-01-01
The main connection and system control theory of rotary kiln DC motor are introduced. The hardware configuration of 6RA70 governor and DC motor drive control system are discussed.%介绍回转窑直流电机的主接线、系统控制原理,阐述调速器6RA70的硬件配置及直流电机拖动控制系统的特点。
PWM电机调速在专用打印机中的应用%The application in passport of the DC motor PWM speed control mode
Institute of Scientific and Technical Information of China (English)
牟岳泰
2012-01-01
本文主要研究了单片机实现直流电机闭环控制的调速方式，阐述了直流电机的PWM调速控制的软硬件设计思路与实现。%This paper mainly studies the MCU DC motor closed-loop control mode, elaborated the DC motor PWM speed control hardware and software design and implementation.
Permanent magnet DC motor for welding machine%焊机用永磁直流电机
Institute of Scientific and Technical Information of China (English)
刘宝树
2013-01-01
永磁直流电动机以其体积小、效率高、结构简单、运行可靠、调节特性好(调节特性线性度好、调节范围宽且便于控制)等优点,广泛运用于焊接送丝领域.从永磁直流电动机的稳态运行特性、电机运行特性的温度敏感性、动态特性几个方面对电机的特性进行阐述,为送丝电机的造型提供参考.%Magnetic DC motor with its small size,high efficiency,simple structure,reliable operation,good regulation characteristics (regulation characteristics of good linearity, wide adjustable range and easy to control) and other advantages, is widely used in the field of welding wire feeding.From the permanent magnet DC motor steady state characteristic of motor operating characteristics,temperature sensitivity,dynamic characteristic of the motor characteristics are described.
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)
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.
Diagnostics of DC and Induction Motors Based on the Analysis of Acoustic Signals
Glowacz, A.
2014-10-01
In this paper, a non-invasive method of early fault diagnostics of electric motors was proposed. This method uses acoustic signals generated by electric motors. Essential features were extracted from acoustic signals of motors. A plan of study of acoustic signals of electric motors was proposed. Researches were carried out for faultless induction motor, induction motor with one faulty rotor bar, induction motor with two faulty rotor bars and flawless Direct Current, and Direct Current motor with shorted rotor coils. Researches were carried out for methods of signal processing: log area ratio coefficients, Multiple signal classification, Nearest Neighbor classifier and the Bayes classifier. A pattern creation process was carried out using 40 samples of sound. In the identification process 130 five-second test samples were used. The proposed approach will also reduce the costs of maintenance and the number of faulty motors in the industry.
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.
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.
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.
System Simulation of Brushless DC Motor%无刷直流电动机的系统仿真
Institute of Scientific and Technical Information of China (English)
孙艳霞; 刘宗
2000-01-01
建立了一个场路结合的无刷直流电动机系统数学模型，对其稳态动特性进行了仿真，并分析了不同电机参数对电机性能的影响．%The steady-state dynamic performances of brushless DC motor are simulated. Themathematics model of field-circuit coupled is established, and the key parameters effectingperformance are analyzed.
Directory of Open Access Journals (Sweden)
Rahat Ullah Khan,
2010-03-01
Full Text Available In this paper an innovative technique is proposed to run a DC series motor and converting it into D C separately excited as and when required to do regenerative braking and controlling a loaded car. In this scheme we are proposing on alternate energy source for driving the car i.e. solar PV Cell based battery charging system. The implication, basic concept and limitations of this concept are discussed. Also the mode of operations including analysis and operating conditions is also discussed. The simulation results are provided to validate the concept.
Ishak, D.; Zhu, Z. Q.; Howe, D.
2005-05-01
The electromagnetic performance of fault-tolerant three-phase permanent magnet brushless dc motors, in which the wound teeth are wider than the unwound teeth and their tooth tips span approximately one pole pitch and which have similar numbers of slots and poles, is investigated. It is shown that they have a more trapezoidal phase back-emf wave form, a higher torque capability, and a lower torque ripple than similar fault-tolerant machines with equal tooth widths. However, these benefits gradually diminish as the pole number is increased, due to the effect of interpole leakage flux.
Diseño de un observador y un controlador de velocidad de un motor DC por modos deslizantes
Jesse Mauricio Beltrán Soto; Juan Diego Sánchez Torres
2014-01-01
En este artículo se presenta una estructura de estimación y control de estados mediante modos deslizantes para un modelo lineal. Se presenta un sistema mecánico de un Motor DC, al cual se le diseñaran un observador y un controlador deslizante de primer y segundo orden. Los resultados se comparan con un diseño de un PID. Los dos diseños se prueban ante cambios de referencia, perturbaciones y ruido.
Diseño de un observador y un controlador de velocidad de un motor DC por modos deslizantes
Directory of Open Access Journals (Sweden)
Jesse Mauricio Beltrán Soto
2014-07-01
Full Text Available En este artículo se presenta una estructura de estimación y control de estados mediante modos deslizantes para un modelo lineal. Se presenta un sistema mecánico de un Motor DC, al cual se le diseñaran un observador y un controlador deslizante de primer y segundo orden. Los resultados se comparan con un diseño de un PID. Los dos diseños se prueban ante cambios de referencia, perturbaciones y ruido.
DEFF Research Database (Denmark)
Munteanu, A.; Agarlita, S. C.; Blaabjerg, Frede
2012-01-01
The present paper introduces a novel six-step commutation strategy for sensorless control applied for a surface permanent magnet synchronous motor that implies only dc link measurement (battery current and battery voltage). The control strategy makes use of a modified I-f starting procedure...... and then switches seamlessly to sensorless speed control. Soft-switching for the six-step commutation pattern is considered. It will be shown that the current absorbed from the battery contains consistent information that can be used to determine the commutation points; the detection of the zero...
A Five-Level Cascade Multilever Invertor Three-Phase Motor Drive Using a Single DC Source
Energy Technology Data Exchange (ETDEWEB)
Chiasson, J.N. (Univ. Tennessee-Knoxville)
2006-09-15
A method is presented showing that a 5-level cascade multilevel inverter for a three-phase permanent magnet synchronous motor drive can be implemented using only a single DC link to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. It is shown that the capacitor voltages can be regulated while achieving an output voltage waveform that is 20% greater than that obtained using the standard 3-leg inverter alone. Finally conditions are given in terms of the power factor and modulation index that determine when the capacitor voltage can regulated.
A Five-Level Cascade Multilevel Inverter Three-Phase Motor Drive Using a Single DC Source
Energy Technology Data Exchange (ETDEWEB)
Chiasson, J. N. [University of Tennessee, Knoxville (UTK)
2006-10-01
A method is presented showing that a 5-level cascade multilevel inverter for a three-phase permanent magnet sychronous motor drive can be implemented using only a single DC link to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. It is shown that the capacitor voltages can be regulated while achieving an output voltage waveform that is 20% greater than that obained using the standard 3-leg inverter alone. Finally conditions are given in terms of the power factor and modulation index that determine when the capacitor voltage can regulated.
Kaźmierczak, Marek; Kudra, Grzegorz; Awrejcewicz, Jan; Wasilewski, Grzegorz
2015-09-01
A mathematical model of a system consisting of a dc motor, mechanism converting the rotational motion to the linear one and a single physical pendulum with the joint horizontally driven is developed. Constant angular velocity of the crank is assumed. The parameters of the model are estimated using the experimental data consisting of five solutions corresponding to the five different values of constant input voltage. Different versions of the mathematical model, with different details concerning friction and damping modelling, are tested. A good agreement between real and simulated behaviour of the system is obtained. Moreover the model is validated by testing its ability to predict critical values of the bifurcation parameter.
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.
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.
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...
Development of a dc motor with virtually zero powered magnetic bearing
1971-01-01
The development of magnetic bearings for use in direct current electric motors is discussed. The characteristics of the magnets used in the construction of the bearings are described. A magnetic bearing using steel armoring on permanent magnets was selected for performance tests. The specifications of the motor are presented. The test equipment used in the evaluation is described.
Energy Technology Data Exchange (ETDEWEB)
Ikeda, M. [Asahi Chemical Industry Co. Ltd., Tokyo (Japan); Hashimoto, H. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science
1994-10-20
The driving system and its control method were studied to miniaturizing the robot and multiplying its degree of freedom. Through designing the composition of force-transferring device driven by wire and actuator done by thin linear motor, the space can be saved by separating the places needing the force-transferring device and those doing the actuator. However, the driving by wire has the unknown stiffness, backlash, friction and other hardly controllable elements. Three types of robust control, observer-based control, sliding-mode control and H{infinity} control were applied and mutually compared. The H{infinity} control was a H{infinity} norm which was adopted, with optimization, into the evaluation function to measure the objective transfer function. Enabling the comparatively easy designing of high-gain controller to comply with the objective, the H{infinity} control theory was known to be effectively applicable even to the objective having the backlash, friction and resonance point. The present control was robust also against the fluctuation in load. 10 refs., 15 figs., 2 tabs.
Liu, Z. J.; Li, J. T.; Jabbar, M. A.
2006-04-01
In design of permanent magnet motors for high-precision applications, it is sometimes necessary, early in the design stage, to have a detailed analysis of the effect of rotor eccentricity that may result from manufacturing imperfectness or use of fluid dynamic or aerodynamic bearings. This paper presents an analytical model for electromagnetic torque and forces in permanent magnet motors with rotor eccentricity. The model gives an insight to the relationship between the effect of the eccentricity and the other motor design parameters on the electromagnetic forces. It is shown that the calculated magnetic forces obtained from this model agree well with those obtained from numerical simulations that are very computationally demanding.
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.
Bosker, W.T.E.
2011-01-01
Brushes and Proteins Wouter T. E. Bosker Protein adsorption at solid surfaces can be prevented by applying a polymer brush at the surface. A polymer brush consists of polymer chains end-grafted to the surface at such a grafting density that th
Calculation Of The Brushless DC Motor Shaft Speed With Allowances For Incorrect Alignment Of Sensors
2015-01-01
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...
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.
Lee, C. I.; Jang, G. H.
2009-04-01
Uneven magnetization of permanent magnets (PMs) is one of the major sources of unbalanced magnetic force and torque ripple, which excite a brushless dc (BLDC) motor. This paper investigates the frequency contents of the back electromotive force (BEMF) due to the unevenly magnetized PMs in a BLDC motor. The magnetic field of a BLDC motor is solved by using the finite element method, and the BEMF is calculated by differentiating the flux linkage with respect to time. The characteristics of BEMF are investigated by using the spectral analysis. Magnetic flux density of the ideally magnetized PMs has the harmonics of the pole-pair number, but unevenly magnetized PMs generate the additional harmonics. This research shows numerically and experimentally that the frequency components of the BEMF are determined by the least common multiple between the frequency contents of magnetic flux density from the PMs and the slot number per phase. It also shows that the magnetized status of the PMs of a BLDC can be noninvasively identified by monitoring the frequencies and the amplitudes of BEMF.
Energy View of Brake of DC Motor%直流电动机制动的能量观
Institute of Scientific and Technical Information of China (English)
程小华
2012-01-01
DC motor's electromagnetic brakes were reviewed from energy view by this paper. They were classified into five types as follow; 1) potential energy feedbacked and speed constrained; 2) kinectic energy consumed and motor stopped; 3) potential energy consumed and speed reversed; 4) kinectic energy and electric energy consumed and motor stopped; 5) potential energy and electric energy consumed and speed reversed. This classification is uniform logically because the calssification standard is single,only being energy view.%本文从能量观点,重新审视了直流电动机的各种电磁制动状态,并把这些状态分为:势能回馈限速式、动能消耗停机式、势能消耗反转式、动电消耗停机式、势电消耗反转式这五类.这样分类统一从能量角度出发,具有逻辑的一致性.
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.
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.
Ring of Fire Accident Prevention and Handling of DC Motor%关于直流电机环火事故预防及处理
Institute of Scientific and Technical Information of China (English)
芶大斌
2012-01-01
某发电企业曾发生过发电机励磁机环火的事故,本文阐述了直流电机环火事故的预防和解决直流电机环火事故的措施.%A power generation companies have occurred in the generator exciter ring of fire accidents, This paper describes the measures of the ring of fire prevention of accidents of the DC motor and DC motor ring of fire accident.
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.
一种棒球发球机的永磁直流电机开发%A Baseball Pitching Machine Permanent Magnet DC Motor Development
Institute of Scientific and Technical Information of China (English)
周锦添
2014-01-01
The permanent magnet DC motor development process on baseball pitching machine,introduced the production of permanent magnetic DC motor is the key equipment and instrument, sums up the manufacturing process of each component of permanent magnetic DC motor armature, stator and assembly, the motor manufacturing technology and production site management personnel to grasp the current permanent magnetic DC motor manufacturing technology.%通过阐述棒球发球机的永磁直流电机开发过程，介绍了生产永磁直流电机所需关键设备及仪器，总结了永磁直流电机电枢、定子、总装等各个部件的制造工艺，帮助电机制造工艺人员和生产现场管理人员掌握最新的永磁直流电机制造技术。
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.
Ali Asghar Memon; Imtiaz Hussain; Muhammad Aslam Uqaili
2013-01-01
This paper presents a gate driver circuit for the switching devices used in the asymmetrical converter for a switched reluctance machine with reduced number of isolated dc/dc converters. Isolation required in the gate driver circuit of switching devices is indispensable. For the purpose of isolation different arrangements may be used such as pulse transformers. The dc/dc converter for isolation and powering the gate drive circuits is suitable, cheaper in cost and simple to implement. It is al...
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.
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.
Excited DC Motor Reverse Braking Exploration%他励直流电动机反接制动探析
Institute of Scientific and Technical Information of China (English)
王春; 赵宜静
2013-01-01
Separately excited DC motor braking teaching, students often have difficulty understanding potential energy load reverse connect brake and an armature of reverse braking of difference. The author from the armature circuit voltage balance equation, the mechanical characteristic curve of proceed analysis explain, make students more easily understand and master.%他励直流电动机的反接制动教学中,学生往往难以理解位能负载时的反接制动和电枢反接制动的区别.该文从电枢电路的电压平衡方程式、机械特性曲线着手进行分析讲解,使得学生较易理解和掌握.
Directory of Open Access Journals (Sweden)
Paul Cepeda
2014-01-01
Full Text Available How can students be given experience in the confused realities of engineering processes? How can undergraduate students be convinced that processes can be analyzed and improved? Computer simulations properly designed and applied could answer these challenges revolutionizing education in Power Electronics. In recent years, computer simulation has been commonly used in education to motivate students in their learning and help teachers to improve their teaching level. The present paper focuses on developing a speed controller for DC motors starting from theoretical aspects, passing through simulations, and finally reaching a control prototype. The control theory is based on a nonlinear technique known as Sliding Mode Control (SMC involving artificial intelligence for optimization such as Fuzzy Logic (FL, Adaptive Neurofuzzy Inference Systems (ANFIS, and Genetic Algorithms (GAs.
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.
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.
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.
无刷直流电机无位置传感器直接转矩控制%Direct Torque Control of Sensorless Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
雷雄
2012-01-01
A direct torque control for sensorless brushless DC motor is presented in this paper. The control method presented requires observation of the DC bus voltage and the three-phase stator currents of brushless DC motor, and estimate the flux, torque, and rotor position angles of motor In order to control brushless DC motor, the appropriate voltage space vector is selected according to the torque, current component on d-q axes and rotor position. The simulation and experimental results show that the control method is valid and feasible.%本文提出了一种将直接转矩控制应用于无刷直流电机的无位置传感器控制方法。需观测无刷直流电机的直流母线电压及定子侧的三相电流，从而估算出电机的磁链、转矩以及位置角，再根据转矩、d-q坐标系上的电流分量以及转子位置信息来选择相应的电压空间矢量，以实现对无刷直流电机的控制。仿真和实验结果表明本文提出的控制方法有效可行。
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.
Co-Simulation of BLDC Motor Commutation by using MATLAB Simulink and Xilinx System generator
Directory of Open Access Journals (Sweden)
Suneeta
2016-04-01
Full Text Available This work mainly focuses on Matlab Simulink model for electronic commutation of BLDC motor and co simulation of the model by using Xilinx System generator tool. The BLDC motors (AKM21E are available in small size with good speed/torque characteristics. Since, the efficiency and dynamic response is high compared to brushed DC motor, they have widely used in various applications. We are using BLDC motor for adjusting the focus in radio telescope. The efficient electronic commutation is designed and tested by using modelling in Matlab Simulink. The Co verification of the model is done by using Xilinx system generator.
ESCRIVÀ ARLANDIS, JOAN
2013-01-01
Este proyecto presenta el diseño de un prototipo que permitirá el control total de la transmisión de potencia en un motor DC (corriente continua), de tal manera, que se pueda ajustar la respuesta de aceleración y frenado del motor mediante cuatro parámetros, ajustándose a las necesidades del usuario, que en la aplicación final se utilizará, para regular la respuesta, a través de un sensor magnético, que actuará como acelerador y freno. La transmisión de potencia al motor, se reali...
Out of Step for Synchronous Motor and Clamp in Air Gap of DC Motor%同步电机的失步与直流电机的气隙磁场箝位
Institute of Scientific and Technical Information of China (English)
童钟良
2014-01-01
文章阐明了电机原理中缺少的失步及箝位概念，指出自控变频的电动机实际上是馈电方式交流化的直流电动机。%The concept of clamp and out of step was explained in this paper. It was indicated that the self-controlled variable frequency motor exactly was DC motor with AC supply.
Directory of Open Access Journals (Sweden)
Farid Khoucha
2013-01-01
Full Text Available This paper presents a new hybrid cascaded H-bridge multilevel inverter motor drive DTC scheme for electric vehicles where each phase of the inverter can be implemented using a single DC source. Traditionally, each phase of the inverter requires DC source for output voltage levels. In this paper, a scheme is proposed that allows the use of a single DC source as the first DC source which would be available from batteries or fuel cells, with the remaining ( DC sources being capacitors. This scheme can simultaneously maintain the capacitors of DC voltage level and produce a nearly sinusoidal output voltage due to its high number of output levels. In this context, high performances and efficient torque and flux control are obtained, enabling a DTC solution for hybrid multilevel inverter powered induction motor drives intended for electric vehicle propulsion. Simulations and experiments show that the proposed multilevel inverter and control scheme are effective and very attractive for embedded systems such as automotive applications.
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.
Position and Speed Control of Brushless DC Motors Using Sensorless Techniques and Application Trends
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
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.
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.
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.
Sustained excitability elevations induced by transcranial DC motor cortex stimulation in humans.
Nitsche, M A; Paulus, W
2001-11-27
The authors show that in the human transcranial direct current stimulation is able to induce sustained cortical excitability elevations. As revealed by transcranial magnetic stimulation, motor cortical excitability increased approximately 150% above baseline for up to 90 minutes after the end of stimulation. The feasibility of inducing long-lasting excitability modulations in a noninvasive, painless, and reversible way makes this technique a potentially valuable tool in neuroplasticity modulation.
Directory of Open Access Journals (Sweden)
Quanwu Li
2016-01-01
Full Text Available High reliability is required for the permanent magnet brushless DC motor (PM-BLDCM in an electrical pump of hypersonic vehicle. The PM-BLDCM is a short-time duty motor with high-power-density. Since thermal equilibrium is not reached for the PM-BLDCM, the temperature distribution is not uniform and there is a risk of local overheating. The winding is a main heat source and its insulation is thermally sensitive, so reducing the winding temperature rise is the key to the improvement of the reliability. In order to reduce the winding temperature rise, an electromagnetic-thermal integrated design optimization method is proposed. The method is based on electromagnetic analysis and thermal transient analysis. The requirements and constraints of electromagnetic and thermal design are considered in this method. The split ratio and the maximum flux density in stator lamination, which are highly relevant to the windings temperature rise, are optimized analytically. The analytical results are verified by finite element analysis (FEA and experiments. The maximum error between the analytical and the FEA results is 4%. The errors between the analytical and measured windings temperature rise are less than 8%. It can be proved that the method can obtain the optimal design accurately to reduce the winding temperature rise.
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Nitin Subramonium A K
2017-03-01
Full Text Available Environmental protection and energy conservations are the main concern of 21st century Asia Pacific developing countries. This concern has compelled to design and develop zero pollution road transportation Electric Vehicles (EVs. The EV system consist of energy storage devices such as battery, fuel cell, ultra-capacitors along with electric propulsion, body of the vehicle and energy management system with the diversified technology of electrical, electronics, mechanical, automotive and chemical engineering. The objective of electric vehicle is to produce commercial viable range, efficient performance, and comfort with safety and reliable operations at cheaper price than its counterpart the Internal Combustion Engine Vehicle (ICEV. The PMBLDC motors are the present choice of automobile industries and researchers because of its high power density, compact size, reliability, with noise free and minimum maintenance requirements. The present state of art Permanent Magnet Brushless DC (PMBLDC Motor drive for the electric vehicle application is studied / reviewed in this paper.. In addition the study also reveals the advancement of the Power Processing Unit (PPU which consists of Microelectronics and Controls (Me and C to produce the super-premium efficiency PMBLDC drive system for EV applications.
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.
Institute of Scientific and Technical Information of China (English)
张旭
2016-01-01
In order to improve the brushless DC motor voltage regulation system voltage conversion efficiency and reduce power consumption, based on BUCK transformer chopper voltage regulation technology was put forward. In this paper elaborat-ed the circuit structure and mathematical model of brushless DC motor with BUCK mode, analyzed technology of DC converter and BUCK dc transform. Take advantage of MATLAB software SIMULINK module modeling BUCK DC converter, simula-tion for BUCK DC transform under the 20kHz working frequency, got the switch tube gate trigger pulse, inductive voltage and inductance current, output voltage, switching tube and diode current simulation curve. The simulation results and theoretical analysis of waveform basically the same, the rationality was proved of BUCK DC converter model.%为了提高无刷直流电动机调压系统电压转换效率、降低功率消耗，提出基于BUCK变换的斩波调压技术。在阐述BUCK模式下无刷直流电动机电路结构、数学模型基础上，对直流变换器和BUCK直流变换技术进行分析。利用MATLAB软件SIMULINK模块对BUCK直流变换器进行建模，对20kHz工作频率下BUCK直流变换进行仿真，得到开关管门极触发脉冲、电感电压、电感电流、输出电压、开关管电流和二极管电流仿真曲线。仿真结果与理论分析波形基本一致，表明BUCK直流变换器模型的合理性。
Directory of Open Access Journals (Sweden)
Abdelfettah Zeghoudi
2015-06-01
Full Text Available Recent research in the field of motor controls is becoming more interesting especially with the developments of new control methods. This study shows a comparative study between two artificial intelligence methods namely neural networks and fuzzy logic for the speed control of a DC motor for the orientation of a heliostat in a solar tower power plant. The speed controller of DC motor is performed using two Fuzzy Logic Configuration (FLC1 and FLC2 and neural controller in MATLAB environment. The simulation results are used to make sure the real possibility of using artificial intelligence systems to identify and control this type of installation. The performance of the Fuzzy Logic Controller and Neural control are compared using different errors metrics. The results show that Fuzzy logic method is more efficient compared with neural controller method.
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.
Study on rotating speed control of DC motor in welding system%焊接系统中直流电机转速控制的研究
Institute of Scientific and Technical Information of China (English)
李林
2011-01-01
在CO2焊接和埋弧焊接系统中,精确控制行走电机和送丝电机的速度是提高焊接质量的重要保证,传统直流电机转速控制方法是通过转速表测量电机的转速后反馈控制,该控制方法存在精度差、不易调试等缺点.采用锁相环闭环控制直流电机的转速,其控制方法是:由于行走电机和送丝电机的转速比较慢,因此,编码器不通过减速机构直接安装在直流电机的转轴上,从而测得电机的转速,与设定速度作PI控制产生PWM波形控制H型双极可逆驱动电路开关管的导通时间,从而精确控制直流电机的转速.试验表明,该方法控制精确高,能稳定、可靠、实时地控制电机转速.%In C02 welding and submerged arc welding system,precise control of the speed of the moving motor and wire feeding motor is an important guarantee to improve the welding quality of dc motor speed control,the traditional method is detecting motor speed with tachometer to feedback control system, this control method is poor, not easy to adjust the control accuracy .This article adopts the phase locked loop closed-loop to control dc motor speed,and its control method is:because of the moving motor and wire feeding motor speed is slower,therefore,not through the slow institutions encoder directly installed in dc motor shaft,which measured the speed of the motor,and setting speed make PI control to produce the PWM waveform to control H bipolar reversible driving circuit switch's runs.Thus accurately control dc motor speed,the experimental result indicates that the method can accurately control high, stable,real-time controlling motor speed.
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.
R. Silva-Ortigoza; García-Sánchez, J. R.; J. M. Alba-Martínez; Hernández-Guzmán, V. M.; Marcelino-Aranda, M.; Taud, H.; Bautista-Quintero, R.
2013-01-01
This paper presents a two-stage control design for the “Buck power converter/DC motor” system, which allows to perform the sensorless angular velocity trajectory tracking task. The differential flatness property of the DC-motor model is exploited in order to propose a first-stage controller, which is designed to achieve the desired angular velocity trajectory. This controller provides the voltage profiles that must be tracked by the Buck converter. Then, a second-stage controller is meant to ...
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。
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.
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.
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)
Ali Asghar Memon
2013-04-01
Full Text Available This paper presents a gate driver circuit for the switching devices used in the asymmetrical converter for a switched reluctance machine with reduced number of isolated dc/dc converters. Isolation required in the gate driver circuit of switching devices is indispensable. For the purpose of isolation different arrangements may be used such as pulse transformers. The dc/dc converter for isolation and powering the gate drive circuits is suitable, cheaper in cost and simple to implement. It is also significant that required number of isolation converters is much less than the switches used in converter. In addition, a simple logic circuit has been presented for producing the gate signals at correct phase sequence which is compared with the gated signals directly obtained from the encoder of an existing machine.
用ST72141实现无刷直流电机的控制%Control of DC Non-brush Motor with ST72141
Institute of Scientific and Technical Information of China (English)
万诚
2003-01-01
意法半导体的ST72141是专门用在无刷直流电机(BLDC)控制的单片机.内部包含意法半导体自有的反电动势检测专利技术,专门用于电机控制的片内外设,大大减少了电机控制系统的成本,简化了电机控制系统的设计.
无传感器无刷直流电机系统设计%The DC motor design without sensors and brushes
Institute of Scientific and Technical Information of China (English)
朱明程; 吕利昌
2000-01-01
本文介绍了一个无传感器BLDC(无刷直流电机)系统的结构组成,该系统以Motorola的MC68HC705MC4作为控制芯片.并详细讨论了系统的硬件构成、无位置传感器系统的控制算法和控制程序的各主要功能模块.
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 ...
Directory of Open Access Journals (Sweden)
R. Silva-Ortigoza
2013-01-01
differential flatness property of the DC-motor model is exploited in order to propose a first-stage controller, which is designed to achieve the desired angular velocity trajectory. This controller provides the voltage profiles that must be tracked by the Buck converter. Then, a second-stage controller is meant to assure the aforementioned. This controller is based on flatness property of the Buck power converter model, which provides the input voltage to the DC motor. Due to the fact that the two-stage controller proposed uses the average model of the system, as a practical and effective implementation of this controller, a Σ − Δ-modulator is employed. Finally, in order to verify the control performance of this approach, numerical simulations are included.
基于 LPC2148的无刷直流电机控制器的设计%Brushless DC Motor Controller Based on LPC2148
Institute of Scientific and Technical Information of China (English)
郎宝华; 李本斌
2015-01-01
设计了一款以 ARM7为核心的无刷直流电机控制器，给出了软硬件的具体实现方法，实现了霍尔传感器控制和反电势法控制。实验结果表明，该控制器可以可靠地驱动无刷直流电机，并可以进行速度控制。%A brushless DC motor controller whose core is ARM T is designed .And the concrete method of realization a‐bout the software and hardware is given .Both position sensor and back electromotive force control can be realized .The ex‐perimental results show that the controller can drive brushless DC motor reliably ,and owns the ability about speed control .
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.
The DC Motor Soft-starter Design based on PLC%基于PLC的直流电动机软启动器的设计
Institute of Scientific and Technical Information of China (English)
杨扬; 贺明智; 孙利娟; 夏欢
2011-01-01
The DC motor Soft-starter based on PLC use open-loop PWM control to reduce impulse current when DC motor starting and achieve a smooth soft start. The design scheme of main circuit and control circuit is explained. Finally, the experiment result is given.%基于PLC的直流电动机软启动器采用开环PWM控制方法,减小了直流电动机启动时的冲击电流,实现了平滑软启动.详细介绍了直流电动机软启动器主电路和控制电路的设计方法,最后给出了实验结果.
Dynamic Simulation Analysis of Three Phase DC Motor by MATLAB/Simulink%基于MATLAB／Simulink的三相直流电机动态仿真
Institute of Scientific and Technical Information of China (English)
张小石; 郝秀平; 廖辉; 魏松波
2014-01-01
The article introduces the working principle of three-phase DC motor .By use of MATLAB software ,it gets the three phase current ,rotational speed and torque of three phase DC motor through the method of mathematical modeling in Simulink ,it is available for analyzing the dynamic characteristics of the machine .%介绍了某三相直流电机的工作原理，以MATLAB软件为工具，通过Simulink中数学建模的方法，得到了三相直流电机的三相电流、转速、力矩，利用仿真结果能够更好地分析电机的动态特性。
DEFF Research Database (Denmark)
Maheshwari, Ram Krishan; Munk-Nielsen, Stig; Busquets-Monge, S.
2012-01-01
The size of passive components in an adjustable speed drive can be reduced by using small dc-link capacitors. The EMI filter in the drive also consists of passive components. The size of the filter can be reduced by using a three-level inverter, which can have low output voltage distortion. However......, the three-level inverter based on small dc-link capacitors requires a PWM strategy to maintain neutral-point voltage balance. In this paper, the common mode voltage, which is the determining factor for the EMI filter size, is analyzed for a virtual-vector-based PWM strategy. The common mode voltage....... Results show that the conducted emission from the three-level inverter is lower than that of the two-level inverter. Thus, a three-level inverter requires a smaller EMI filter in motor drives with small dc-link capacitors....
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.
PID Speed Control of DC Motor in CPM Rehabilitation Apparatus%CPM康复器中的直流电机PID调速控制
Institute of Scientific and Technical Information of China (English)
纪庆龙; 张凤生; 巩浩; 李富才
2012-01-01
The traditional PID algorithm is improved by use of trapezoidal method and differential ahead algorithm, which enhances the stability and accuracy of the PID speed governing of DC motor. A method to measure DC motor' s output torque by means of measuring armature current is presented based on the speed governing method of adjusting armature current and PWM principle. On the basis of LabVIEW and NI ELVIS Ⅱ + experimental platform, the speed governing system for DC motor has been built. The experimental results not only verify the validity of improved PID algorithm, but also the feasibility of the method to measure DC motor's output torque without torque sensor in CPM rehabilitation apparatus.%采用梯形法和微分先行算法对传统的数字PID算法进行改进,提高了直流电机的PID调速稳定性和精度.基于调节电枢电压的调速方法和PWM原理,给出了通过测量电枢电流实现电机输出扭矩测量的方法.在LabVIEW软件开发环境和NI ELVISⅡ+实验平台基础上,构建直流电机调速系统,通过实验验证了对PID算法改进的有效性,以及在CPM康复器中不用扭矩传感器而实现电机扭矩测量的可行性.
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.
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。
Network Controller of DC Motor Based on LPC2132%基于LPC2132的直流电机网络控制器
Institute of Scientific and Technical Information of China (English)
贺洪江; 张瑞东
2012-01-01
Designed a set of fully digital DC motor controller, not only combined the high-performance ARM processor and advanced current sensor IR2171, but also enabled data communication with a PC for achieving a multi-node remote DC motor control. The article successfully implemented the digital DC motor control system. The test results show that the system has a simple structure, and easy to control, has high anti-interference ability and fault diagnosis and protection, so the system is of great practical value.%该系统设计了一套全数字式的直流电机控制器,把高性能的ARM处理器与先进的电流传感器IR2171相结合,通过与PC进行数据通信,实现直流电机的多节点远程控制,成功设计了全数字式直流电机控制系统.测试结果表明本系统具有结构简单、控制方便、抗干扰能力强、故障诊断和保护等优点,具有很好的实用价值.
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.
矿用电机车直流电动机故障原因分析及对策%Fault analysis of DC motor of mine locomotives and countermeasures
Institute of Scientific and Technical Information of China (English)
王铖
2011-01-01
以ZQ-21型矿用机车为例,通过理论分析和实践经验,对直流电动机的常见故障原因及发生机理进行了深入剖析,找出了生故障的原因,提出了有针对性的防治措施和维护方法,对直流电动机的维护保养和故障预防具有很好的指导意义和借鉴价值.%Combining theories with practical experiences, the paper analyses the generation reasons and mechanism of common faults of DC motors with a ZQ-21 DC motor serving as the example, and proposes target preventive countermeasures and specific maintenance methods for DC motors. The study provides guidances and references for maintenance and fault prevention of DC motors.
Cavitation during wire brushing
Li, Bo; Zou, Jun; Ji, Chen
2016-11-01
In our daily life, brush is often used to scrub the surface of objects, for example, teeth, pots, shoes, pool, etc. And cleaning rust and stripping paint are accomplished using wire brush. Wire brushes also can be used to clean the teeth for large animals, such as horses, crocodiles. By observing brushing process in water, we capture the cavitation phenomenon on the track of moving brush wire. It shows that the cavitation also can affect the surface. In order to take clear and entire pictures of cavity, a simplified model of one stainless steel wire brushing a boss is adopted in our experiment. A transparent organic tank filled with deionized water is used as a view box. And a high speed video camera is used to record the sequences. In experiment, ambient pressure is atmospheric pressure and deionized water temperature is kept at home temperature. An obvious beautiful flabellate cavity zone appears behind the moving steel wire. The fluctuation of pressure near cavity is recorded by a hydrophone. More movies and pictures are used to show the behaviors of cavitation bubble following a restoring wire. Beautiful tracking cavitation bubble cluster is captured and recorded to show.
Fuzzy-PID Hybrid Control Technique for DC Motor Speed Control System%模糊-PID混合控制技术在直流电机调速系统中的应用
Institute of Scientific and Technical Information of China (English)
张宇飞
2012-01-01
为了提高直流电动机调速系统性能,通过模糊PID控制方法和MATLAB软件的控制工具进行直流电动机调速系统的辅助设计。%In order to improve the system performance of DC motor speed control by fuzzy PID control and MATLAB software tool-aided design of the DC motor speed control system.
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。
The Research of Brushless DC Motor Intelligent Control System%直流无刷电机智能控制系统研究
Institute of Scientific and Technical Information of China (English)
张文升; 胡勤耕; 王文丰; 张欣; 施怿文; 陈浩
2012-01-01
阐述直流无刷电机工作原理,分析直流无刷电机的数学模型；介绍模糊控制理论与神经网络控制理论,提出模糊自适应PID控制策略；在MATLAB环境下,分别使用反电动势建模法建立直流无刷电机控制系统的模型,并对各个模型进行仿真分析.然后利用BP神经网络控制策略,模糊自适应PID控制策略改进速度控制器中的常规PID算法,进行仿真,并将所得结果进行对比.从对比结果可以得出模糊自适应PID控制策略更适合直流无刷电机的控制.%This paper expounds the work principle of Brushless DC motor, analyzes the mathematical model of brushless DC motor; introduces the fuzzy control theory and neural network control theory, fuzzy adaptive PID control strategy; used the back EMF modeling established by the method of direct current brushless motor control system model in the MATLAB environment, and analyzes the each model simulation. Then used the BP neural network control strategy, fuzzy adaptive PID control strategy to improve the speed controller of the conventional PID algorithm, simulation, and compared the results. From the comparison of the results, the fuzzy adaptive PID control strategy for brushless DC motor control.
多功能无刷直流电机驱动控制器的研制%Research on Multiple Functions of Brushless DC Motor Drive
Institute of Scientific and Technical Information of China (English)
纪梁洲; 杨向宇; 龚晟
2011-01-01
A simple and easy to extend other functions brushless DC motor drive was designed, it can be used for a high-voltage and high-speed conditions. The MC33035 was combined with the microcontroller PIC18F1220 to solve the power supply problem on the bridge arm in the brushless DC motor driver which is caused by motor launch, because of the bootstrap capacitor technology was taken advantage of in the power supply. The other multiple functions, such as soft start, brake, reversion and so on, were also achieved in the brushless DC motor driver. Good performance of the system of stable and extensible was verified by the systematic experimental results. The system has some practical value in applications.%该文设计了一个电路简单且易于扩展,可用于高压高速场合的无刷直流电机驱动控制器.该驱动器通过无刷直流电机专用芯片MC33035结合单片机PIC18F1220解决了采用自举电容技术得到的驱动器上桥臂电源所造成的电机启动问题并且实现了诸如软启动,制动,正反转等多种功能.实验表明,该系统运行稳定,可扩展性强,具有一定的应用价值.
电动自行车用无刷直流电机控制系统设计%Brushless DC Motor of Electric Bicycle Control System Design
Institute of Scientific and Technical Information of China (English)
钟晓伟; 宋蛰存; 许刚
2011-01-01
根据以无刷直流电机为驱动电机的电动自行车工作原理,设计了一种以ATmega16单片机为控制核心的电动自行车用无刷直流电机控制系统,给出了系统详细的硬件电路和软件设计方法.在MATLAB/Simulink环境下仿真得出适当的速度环与电流环调节器参数值.与传统的专用模拟控制器相比,具有更大的灵活性、可靠性,容易实现附加功能和全数字化控制.%According to brushless DC motor-driven electric motor bike working principle, a brushless DC motor of electric bicycle control system based on ATmega16 microcontroller was designed, a detail of hardware circuit and software design methods were given. In MATLAB/Simulink simulation environment to draw the appropriate speed loop and current loop regulator parameters. Compared to the traditional specific analog controller, it had greater flexibility,reliability, also was easy to implement additional features and fully digital control.
Directory of Open Access Journals (Sweden)
M.Subramanyam
2014-10-01
Full Text Available This paper deals with Speed control of separately excited DC motor using flyback converter with a new non complementary active clamp control method to achieve soft switching and high efficiency for heavy motor load and light load conditions. This is quite attractive for low power application with universal ac inputs, such as external adaptors. With the proposed control technique, the energy in the leakage inductance can be fully recycled. The soft switching can be achieved for the main switch and the absorbed leakage energy is transferred to the output and input side. In the Proposed model the resistive and DC motor is connected to flyback converter and it is simulated with different nominal voltages and rated speed is controlled at different levels for the N-type active clamp flyback converter and P-type active clamp flyback converter respectively. N-type active clamp flyback converter is suitable for high speed variation applications and P-type active clamp flyback converter is suitable for low speed variation applications.
Study of Angular Displacement Servo Control System Based on DC Motor%直流电机的角位移伺服控制系统研究
Institute of Scientific and Technical Information of China (English)
刘海成; 贺亮; 卞玉坤; 姚广俊
2013-01-01
DC motor angular displacement servo control system which takes STM32 microcontroller as the control core is introduced by the paper. The system takes photoelectric encoder as angular displacement sensor, has a motor drive circuit based on PWM and H-bridge, and through digital PID control strategy achieves the angular displacement control based on DC motor. The actual test shows that the system has the features of control precision, good stability and simple structure.%本文介绍一种以STM32微控制器作为控制核心的直流电机角位移伺服控制系统.系统以光电编码器为角位移传感器,还具有基于PWM和H桥的电机驱动电路,并通过数字PID控制策略,实现基于直流电机的角位移控制.实际测试表明,系统具有控制精确、稳定性好和结构简单等特点.
Yamashita, Fumitoshi; Watanabe, Akihiko; Fukunaga, Hirotoshi
The usage of high-performance rare-earth magnets is one of the key technologies in the development of efficient small motors. Ring-shaped melt-spun Nd-Fe-B bonded magnets, prepared using a powder compacting press and/or injection molding, are generally used in typical applications to small efficient motors. For exploiting the maximum characteristics according to the variety of magnetic powder, however, the preparation method of the magnet, the magnet form, and the motor design needs to be changed for high-productivity as well as for improving total performance, including the magnetic properties of bonded magnets. This paper reports recent achievements in new preparation processes for rare-earth bonded magnets and small motors using new materials other than Nd-Fe-B melt-spun powder. This paper especially focuses on the method for maximally exploiting certain rare-earth magnetic powders . Furthermore, reduction in the current consumption of the small DC motor using the developed technique is reported.
Energy Technology Data Exchange (ETDEWEB)
Vuckovic, V.; Vukosavic, S. (Electrical Engineering Inst. Nikola Tesla, Viktora Igoa 3, Belgrade, 11000 (Yugoslavia))
1992-01-01
This paper brings out a control algorithm for VSI fed induction motor drives based on the converter DC link current feedback. It is shown that the speed and flux can be controlled over the wide speed and load range quite satisfactorily for simpler drives. The base commands of both the inverter voltage and frequency are proportional to the reference speed, but each of them is further modified by the signals derived from the DC current sensor. The algorithm is based on the equations well known from the vector control theory, and is aimed to obtain the constant rotor flux and proportionality between the electrical torque, the slip frequency and the active component of the stator current. In this way, the problems of slip compensation, Ri compensation and correction of U/f characteristics are solved in the same time. Analytical considerations and computer simulations of the proposed control structure are in close agreement with the experimental results measured on a prototype drive.
Functional Coatings with Polymer Brushes
König, Meike
2013-01-01
The scope of this work is to fathom different possibilities to create functional coatings with polymer brushes. The immobilization of nanoparticles and enzymes is investigated, as well as the affection of their properties by the stimuli-responsiveness of the brushes. Another aspect is the coating of 3D-nanostructures by polymer brushes and the investigation of the resulting functional properties of the hybrid material. The polymer brush coatings are characterized by a variety of microscopic a...
Directory of Open Access Journals (Sweden)
Tilmann H. Sander
2010-01-01
Full Text Available Neuronal and vascular responses due to finger movements were synchronously measured using dc-magnetoencephalography (dcMEG and time-resolved near-infrared spectroscopy (trNIRS. The finger movements were monitored with electromyography (EMG. Cortical responses related to the finger movement sequence were extracted by independent component analysis from both the dcMEG and the trNIRS data. The temporal relations between EMG rate, dcMEG, and trNIRS responses were assessed pairwise using the cross-correlation function (CCF, which does not require epoch averaging. A positive lag on a scale of seconds was found for the maximum of the CCF between dcMEG and trNIRS. A zero lag is observed for the CCF between dcMEG and EMG. Additionally this CCF exhibits oscillations at the frequency of individual finger movements. These findings show that the dcMEG with a bandwidth up to 8 Hz records both slow and faster neuronal responses, whereas the vascular response is confirmed to change on a scale of seconds.
无刷直流电机系统的CMAC逆模型控制∗%CMAC Inverse Model Control of Brushless DC Motor System
Institute of Scientific and Technical Information of China (English)
李学哲; 张军; 潘玉民
2014-01-01
Based on the idea of inverse system control, an inverse model intelligent control approach was proposed for brushless DC motor( BLDCM) system of nonlinear, strong coupling and uncertain factors. The approach uses the cerebellar model articulation controller ( CMAC ) to realize the inverse dynamic model of brushless DC motor, and a linear system constructed with the original system model, to obtain more ideal than traditional PID control in dynamic and static performance. It can effectively overcome the influence of various complex factors. This method has the characteristics of rapid response, no overshoot and immunity ability and strong robustness. The proposed control method can significantly improve the real-time tracking ability and control accuracy. The simulation and experimental results showed that the effectiveness of the method, then provides a new way for brushless DC motor control.%基于逆系统控制的思想，针对无刷直流电机系统的非线性、强耦合以及不确定因素等提出了一种逆模型智能控制方法。该方法利用小脑模型关节控制器实现无刷直流电机的逆动态模型，与原系统模型构成线性系统，获得较传统PID控制更理想的动静态性能，有效克服各种复杂因素的影响。该方法响应快速、无超调、抗扰能力和鲁棒性强，可显著提高实时跟踪能力和控制精度。仿真证明了该方法的有效性，为无刷直流电机控制提供了一种新途径。
Simulation of Brushless DC Motor Control System%无刷直流电动机控制系统的仿真
Institute of Scientific and Technical Information of China (English)
罗杨瑞; 辛小南; 贺莉
2011-01-01
Through the analysis of the mathematical model of brushless DC motor,the brushless DC motor control system was modeled and emulated with Simulink.The method of look-up table was used to implement the modeling of counter -electromotive force and current control module, which made the system more intuitive, more streamlined and easy to change models.The current and the torque waveform that get from the simulation are nearly the same as that get by the time stepper finite element method.It shows that the establishment of the mathematical model and the simulation method is correct and lay the foundation of further study on permanent magnet brushless DC motor.%通过分析无刷直流电动机数学模型,利用Simulink对无刷直流电动机及其控制系统进行了建模和仿真.分别用查表法来实现反电动势和电流控制模块的建模,使系统更直观、简化,便于模型修改,为无刷直流电动机控制系统的设计和调试提供了新的方法.对模型进行速度控制系统仿真,仿真得到的三相相电流波形和反电动势波形与通过理论分析得到的波形一致,验证了该建模思想和方法的正确性.
Lua Application in DC-motor driven Load Simulator Control System%Lua在电动负载模拟器控制系统中的应用
Institute of Scientific and Technical Information of China (English)
汪玲; 闫杰
2011-01-01
将脚本语言Lua解释器与负载模拟器的实时控制软件,以及控制系统设计仿真软件MATLAB/SIMULINK相结合,构建了功能强大,操作方便的控制系统设计与实验环境.能够在实现各种典型控制算法与负载模拟算法的基础上为各种新算法提供丰富的接口.实际使用表明,脚本语言的引入,增强了原有实验系统的功能,为负载模拟器控制系统中各种算法的实现提供了包括设计、仿真与验证的完整实验环境.%According to the characteristics of DC-motor driven load simulator experiments, script language Lua, real time control software for DC-motor driven load simulator and control system design and simulation tools MATLAB/SIMULINK are integrated to build a powerful, easy to use DC-motor driven load simulator experiment environment. Interfaces for new control strategy experiments are presented as well as implementation of several typical control algorithms and load simulation algorithms. Application shows original experiment system is expanded through the introduction of script language. A comprehensive experiment environment consisting of design, simulation, verification is provided for controller algorithm design.
Directory of Open Access Journals (Sweden)
Abdelkrim Thameur
2015-01-01
Full Text Available This paper proposes a regulation method of back-to-back connected two-level PWM rectifier-five-level Voltage Source Inverter (VSI in order to reduce the torque ripple in induction motor. First part is dedicated to the presentation of the feedback control of two-level PWM rectifier. In the second part, five-level Neutral Point Clamped (NPC voltage source inverter balancing DC bus algorithm is presented. A theoretical analysis with a complete simulation of the system is presented to prove the excellent performance of the proposed technique.
Takashima, Hiroshi; Tomita, Mutuwo; Chen, Zhiqian; Satoh, Mitsuhiko; Doki, Shinji; Okuma, Shigeru
This paper proposes to paste non-magnetic materials on the rotor surface of a cylindrical brushless DC motor and to use the model including the extended e.m.f. for sensorless control. In the proposed method, the inductance changes depending on the rotor position because of eddy currents, which flow on the non-magnetic material at high frequency. The rotor position can be estimated at standstill and at low speeds. The simulation results show that the proposed method is very useful.
一种无刷直流电机参数的测量方法%The Parameter Measurement of Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
易慧斌; 邓惠文; 邓元实; 李昊
2012-01-01
介绍无刷直流电机( Brushless DC Motor,简称BLDCM)参数的一种简单的测量方法.利用并励直流电机参数测量的简易性和可操作性,分别计算出并励直流电机拖动BLDCM时和并励直流电机单独运转时,系统的转动惯量和摩擦转矩系数,即可计算出BLDCM的转动惯量和摩擦转矩系数.
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.
Preparation of carbon brushes with thermosetting resin binder
Institute of Scientific and Technical Information of China (English)
无
2007-01-01
Carbon brushes with a resin binder were prepared according to an industrial process and the effects of the molding pressure, grains size and cure temperature on the properties of brush samples were discussed. The results show that the bulk density,bending strength and Rockwell hardness increase, while resistivity decreases with increasing molding pressure. Cure temperature has much more influence on the properties of brushes than molding pressure and grains size. Isothermal differential scanning calorimetry(DSC) was used to estimate the degree of cure of resin binder and a novel method of using the true density to measure the degree of cure of resin binder was presented and discussed briefly. Based on optimal process parameters carbon brushes were manufactured, durability tests for brushes were carried out on an alternate current motor and scanning electron microscope(SEM)was adopted to observe the morphology of worn surface of brushes. The results show that a luster oxide film can be formed on the surface of brushes and their service life reaches 380 h.
American Association for Health, Physical Education, and Recreation, Washington, DC.
The proceedings include addresses by Logan Wright on highlights of human development from birth to age 11, Leonard A. Cohen on development and function of the mechanisms of perception, Eric Denhoff on motor development as a function of perception, and Alan Hein on exposure history in spatial-motor development. Also provided are reports by William…
基于PIC单片机的直流无刷电机驱动控制器%Brushless DC Motor Controller Based on PIC MCU
Institute of Scientific and Technical Information of China (English)
吕仲军; 刘泽潮
2014-01-01
介绍了一种基于PIC18Fxx单片机的直流无刷电机的控制器；实现了电机的过流保护、欠压保护、PWM调速和速度闭环控制；设计了主要的硬件电路；并给出了部分软件流程图。通过实验与仿真验证了系统的可靠性与稳定性。%This paper introduces a brushless DC motor controller based on the PIC 18Fxx MCU.The Motor Hall signal acquisition , overcurrent protection , undervoltage protection , PWM speed control and speed closed-loop control are realized .The main hardware circuit and the flowchart of software are designed .The reliability and stability of the system is verified by experiment and simulation .
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.
DEFF Research Database (Denmark)
Adamsen, Sven; Olsen, Marianne; Jendresen, Marianne Bille;
2006-01-01
OBJECTIVE: Obtaining cytological specimens by wire-guided endobiliary brushing at the time of endoscopic retrograde cholangiopancreatography (ERCP) is a convenient way to reach a diagnosis. Sensitivity for malignant disease is generally around 50% and specificity around 100%. The present study wa...
Ureteral retrograde brush biopsy
... biopsy URL of this page: //medlineplus.gov/ency/article/003906.htm Ureteral retrograde brush biopsy To use ... minutes. A cystoscope is first placed through the urethra into the bladder. Cystoscope is a tube with a ... results may show cancer cells ( carcinoma ). This test is often used to ...
SIMULINK Modelling and Simulation for Permanent Magnet DC Motor%永磁直流电动机的Simulink建模仿真教学
Institute of Scientific and Technical Information of China (English)
曾进辉; 邓建国
2015-01-01
"Electrical machinery and system's computer simulation"is a professional electrical engineering and automation of an important subject, according to the basic structure of the motor establishment of mathematical model and simulation model is a basic skills training. In this paper, the selection of the most simple motor - permanent magnet DC motor for the study, according to his equivalent circuit establishment of the transient mathematical model,using dynamic library module simulation tool Simulink functional modules in MATLAB software,to build the simulation model. Permanent magnet DC motor is given five basic simulation model. Through the example simulation computation, has confirmed the modelling method accuracy and the validity.%"电机及其系统的计算机仿真"是电气工程及其自动化专业的一门重要课程,根据电机的基本结构建立数学模型并构建仿真模型是一种基本功训练. 本文选择最简单的电机-永磁直流电动机作为研究对象,根据他的等效电路建立瞬态数学模型,利用MATLAB软件中的动态仿真工具Simulink模块库中的功能模块,构建其仿真模型.给出了永磁直流电动机最基本的五种仿真模型.通过实例仿真计算,验证了建模方法的正确性和有效性.
无刷直流电机的定频积分控制%Constant Frequency Integration Control for Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
贺虎成
2013-01-01
A constant frequency integration control method was proposed for brushless DC motor.Making use of the mathematical model and the dynamic equation of the star-type three-phase six-state BLDCM,the relationship between the motor speed,the load torque,the motor parameters and inverter duty cycle was analyzed.Appling constant frequency integration control theory,the motor speed control can be achieved by adjusting the duty cycle.Finally,the presented BLDCM constant frequency integration control method was simulated,and the simulation results confirmed the validity and feasibility of the theoretical analysis.%为改善无刷直流电机(BLDCM)调速系统的性能,提出了BLDCM的定频积分控制方法.利用星型三相六状态BLDCM的数学模型和动态方程,分析了BLDCM速度、负载转矩、电机自身参数和逆变器占空比之间的关系,提出了运用定频积分控制原理,通过调节占空比实现对电机速度的控制.对提出的BLDCM定频积分控制方法进行了仿真研究,仿真结果验证了理论分析的正确性与可行性.
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DSP的无刷直流电机控制系统的设计%Design of Brushless DC Motor System Based on DSP
Institute of Scientific and Technical Information of China (English)
王艳; 王毓顺; 王惠; 魏萍; 陈孝富; 周瑞君
2015-01-01
通过分析无刷直流电机的数学模型,建立了基于DSP的无刷直流电机控制系统仿真模型.采用数字PID算法来设计控制器,通过Matlab仿真,验证了该方法的优越性,系统可以可靠地运行.仿真结果表明,采用此控制方法,系统响应快、抗扰能力强.%On the basis of brushless DC motor mathematical model analysis,the establishment of a brushless DC motor control system simulation model based on DSP.In this paper,PID control strategy is used to design the control er,through the Matlab simulation,verified the superiority of this method,the system can run reliably.The simulation results show that,by using this control method,the system response speed,strong anti disturbance ability.
Study of Brushless DC Motors DTC Based on Simulink%基于Simulink无刷直流电机直接转矩控制研究
Institute of Scientific and Technical Information of China (English)
梅亮; 刘景林; 董亮辉; 马银龙
2013-01-01
Because of direct torque control technology in the application of brushless DC motor,torque ripple and over shoot were reduced,therefore operating performance of brushless DC motor was improved.To reduce torque ripple,to control torque by closed-loop control,adopted double hysteresis control to realize the stator flux 3 points control,then the electric torque was controlled,and a DTC system model was constructed with Matlab/Simulink,simulation results were presented,it's shown the model was effective.%将直接转矩控制(DTC)技术应用于无刷直流电机(BLDC),抑制了转矩波动,而且转速无超调,提高了无刷直流电机运行性能.本文为抑制转矩波动,对转矩进行闭环控制,采用双滞环比较器实现定子磁链3点控制,从而实现了对电磁转矩的控制,并搭建了直接转矩控制系统Matlab/Simulink模型,仿真结果表明该控制方法有效.
Design of a PWM Speed - governing System for DC Motor Based on PLC%基于PLC的直流电机PWM调速系统设计
Institute of Scientific and Technical Information of China (English)
何新霞; 邢瑞军
2011-01-01
设计了基于SIMATIC S7-200 PLC直流电机PWM调速系统.主电路采用双极式可逆PWM变换器,选用集成驱动器M57962L,通过设计其驱动外围电路,实现了对IGBT的导通和关断控制.采用硬件延时电路,防止上、下桥臂直通事故的发生.利用PLC的高速计数功能实现了对电机转速的测量,设计开发了基于PLC的PI控制程序及PWM信号产生程序.从而实现了直流电机的PWM调速,并实现了转速的无静差调节.%The paper presents the design of PWM speed - governing system for DC motor based on S7 - 200 - PLC. The double - polar reversible PWM converter is used and integrated drive electronics M57962 is selected in main circuit. The conduction and switch control of IGBT is realized by designing the peripheral driving circuitry. The delayed circuit is adopted to prevent the shoot -through phenomenon between upper and lower bridge arm in a PWM. Programs for PLC PI control and for PWM signal generation are developed to implement PWM speed- governing for DC motor and floating control on speed.
DC Motor Speed Control System Based on PID Algorithm%基于PID算法的直流电动机调速系统的设计
Institute of Scientific and Technical Information of China (English)
樊学能
2011-01-01
H bridge composed of STC12C4052SCM and MOS tube is used as the hardware foundation to design a PID algorithm DC motor speed control system in this design scheme. STC12C4052 microcontroller can output two way dutyfactor controllable PWM signal to change dutyfactor to achieve the purpose of DC motor speed control. Speed sensor is hall-effect sensor,which is used to realize the closed loop control when the microcontroller interruptedly acquires speed sensor pulse.%该设计方案以STC12C4052单片机和MOS管组成的H桥为硬件基础而设计的PID算法直流电动机调速系统.STC12C4052单片机能输出两路占空比可控的PWM(脉宽调制)信号,通过改变占空比从而达到直流电动机调速的目的.测速传感器采用霍尔传感器测速,通过单片机中断采集传感器产生的脉冲以实现闭环控制.
The Study of Permanent Magnet Brushless DC Motor%对永磁无刷直流电机的研究
Institute of Scientific and Technical Information of China (English)
杨杰城
2016-01-01
随着我国科技不断发展，永磁无刷直流电机已成为电力电子一体化高科技产品，凭借其结构简单、运行可靠、效率高，在航天、医学、家用民用产品制作中得到广泛应用。文章对永磁无刷直流电机设计、控制以及建模方法进行分析，展现其对生产起到的重要作用。%With the continuous development of science and technology in our country,permanent magnet brushless dc motor has become power and electricity integration high-tech products.With its simple structure,reliable operation,high efficiency,it has been widely used in the aerospace,medical,household production.In this paper,the design,control,and modeling methods of permanent magnet brushless dc motor are analyzed.
Torque simulation of wind turbine based on brushless DC motor%基于无刷直流电机的风力机转矩模拟
Institute of Scientific and Technical Information of China (English)
郭天勇; 赵庚申; 赵耀; 程如岐; 赵二刚; 祁超
2011-01-01
In order to solve the problem that the study of wind power generation was restricted by nature conditions, this paper proposed a novel simulation scheme by using brushless DC motor instead of wind turbine, the torque imitation was implemented by controlling the DC side current, and the current loop adopted the control method of radial basis function neural network combined with PI control. A system simulation model was built by Matlab/Simulink, and a hardware platform based on brushless DC motor and permanent magnet generator was also established, which was controlled by DSP. Simulation and experimental results were consistent with theoretical torque, and the torque ripple of brushless DC motor was effectively reduced. This control method is simple with high control precision, and can provide a new idea for the design of the simulation system.%针对风力发电技术的研究受到自然条件制约的问题,该文提出了一种新的利用无刷直流电机来代替风力机的模拟方案,通过控制无刷电机直流侧电流的方式实现转矩控制,电流环采用径向基函数神经网络与PI调节相结合的控制策略.利用Matlab/Simulink建立系统仿真模型,并搭建了基于DSP控制的无刷直流电机+永磁发电机的硬件平台,仿真和试验结果都与理论转矩相吻合,并有效降低了无刷电机的转矩脉动.该方法控制简单、精度高,为实际模拟系统的设计提供了一种新的思路.
Directory of Open Access Journals (Sweden)
Ananda Kumar Akkarapaka
2015-01-01
Full Text Available The drop in DC-link voltage of adjustable speed drives (ASD occurs mainly due to the increase in output power demands. This may lead to inefficient operation and eventually the tripping of the drive. This paper presents a Double Space Vector Pulse Width Modulation (DSVPWM technique for boosting and compensating the DC-link voltage of Z-source inverter (ZSI. The DSVPWM technique estimates the required shoot through period of the Z-source inverter to maintain the DC-link voltage constant at the desired level through capacitor voltage control. The DSVPWM can obtain maximum boost at any given modulation index in comparison to simple boost control (SBC method. It also utilizes the dead time more effectively. The speed control of the ZSI fed induction motor drive is done by employing indirect field-oriented (IFO control method. A 32-bit DSP (TMS320F28335 is used to implement the IFOC-DSVPWM method for ZSI. The power structure and the modulation technique are well suited for electric vehicle application.
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。
Experimental system of controlling DC motor with PID method based on ARM9%基于ARM9的直流电机PID控制实验系统
Institute of Scientific and Technical Information of China (English)
刘远东; 刘林; 张瑞秋
2011-01-01
讲述了以S3C2440A为核心处理器,L298N作为电机驱动的直流电机控制系统,编程实现对电机速度的检测,并用PID算法实现速度的闭环控制.通过在此系统上做实验,可使得学生亲身实践PID控制电机的具体过程.%This paper narrates an experimental system of controlling DC motor which are consist of the core processor - S3C2440A and the driver module - L298N. This system can detect the speed of the DC motor and implete the PID close control. Students can practice the specific process of controlling DC motor with PID method.
三相直流电机伺服系统设计%Design of Three-phase DC Motor Servo System
Institute of Scientific and Technical Information of China (English)
陈志佳; 孙书鹰; 张炜栋
2012-01-01
In order to implement highly precise and real-time tracking for the objects, the DC motor servo system has been designed. The system is composed of the embedded microprocessor STM32F1O3 as the kernel, and the 3-phase DC hrushless motor equipped with Hall commutating sensor as servo motor. In addition, the fuzzy control scheme that is combination of incremental integral separation PID control and fuzzy control is adopted. The experimental test through emulated air-tracking shows that the system is able to reach higher dynamic tracking accuracy and faster response speed, and features stable and smooth performance. It does implement highly precise real-time tracking, and the design meets expected goal.%为实现对高精度实时目标的跟踪,设计了直流电机伺服系统.该伺服系统以STM32F103嵌入式微处理器为控制核心,以带有霍尔换向传感器的三相直流无刷电机作为伺服电机,并采用增量型积分分离式PID控制与模糊控制相结合的模糊PID控制策略.模拟对空跟踪试验测试表明,该系统具有较高的动态跟踪精度和较快的响应速度,平稳性好,实现了高精度实时跟踪,达到了设计的预期目的.
Alhamadi, Mohd A. Wahed
1992-01-01
A three dimensional finite element (3D-FE) method for the computation of global distributions of 30 magnetic fields in electric machines containing permanent magnets is presented. The formulation of this 3D-FE method is based on a coupled magnetic vector potential - magnetic scalar potential (CMVP-MSP) approach. In this CMVP-MSP method, the modeling and formulations of permanent magnet volumes, suited to first and second order MVP 3D-FE environments as well as first order MSP 3D-FE environment, are developed in this dissertation. The development of the necessary 3D-FE grids and algorithms for the application of the CMVP -MSP method to an example brushless dc motor, whose field is three dimensional due to the skewed permanent magnet mounts on its rotor, is also given here. It should be mentioned that the entire volume of the case-study machine from one end to another is considered in the global magnetic field computations. A complete set of results of application of the CMVP-MSP method to the computation of the global 3D field distributions and associated motor parameters under no-load and load conditions are presented in this dissertation. In addition, a complete simulation of the dynamic performance of the motor drive system using the parameters obtained from the 3D-FE field solutions are presented for no-load and various other load conditions. All the above mentioned results are experimentally verified by corresponding oscillograms obtained in the laboratory. These results are also compared with results obtained from motor parameters based on various 2D-FE approaches, showing that for certain types of skewed permanent magnet mounts, 3D-FE based parameters can make significant qualitative and quantitative improvements in motor-drive simulation results.
A Study of Direct Identification Method of Brushless DC Motor Parameters%无刷直流电动机参数直接辨识法研究
Institute of Scientific and Technical Information of China (English)
袁国珍; 齐蓉; 白文伟
2013-01-01
Against the brushless DC motor already in mass production, a new and practical parameter identification method called direct identification method was proposed. Based on the basic characteristics of the motor's equivalent circuit , the motor's parameter identification strategy was studied, which provided control parameters for precise control of motor. In order to verify the effectiveness of this method, a parameter identification simulation of a finished motor was used. The result indicates that this identification method is simple to implement, has a low computation, has recognition accuracy that can meet the engineering requirements, and is easier to be implemented than traditional identification methods.%针对已经量产、产品化的无刷直流电动机,研究了一种新的实用的无刷直流电动机参数辨识方法——直接辨识法.基于电机等效电路的基本特性,研究电机参数辨识策略,为精确控制电机提供控制参数.为验证该辨识方法的有效性,对一个成品电机进行参数辨识仿真,结果表明该辨识方法的优点是实现简单、运算量小、辨识精度可以满足工程要求,并且较传统辨识方法更易实现.
The DC Motor Control System Based on Wireless Remote Control Technology%无线电遥控式直流电机控制系统
Institute of Scientific and Technical Information of China (English)
余翔翔; 陈德传; 郑忠杰
2013-01-01
The motor actuating unit based on wireless remote control has a vast application prospect .There-fore, this paper proposes a wireless remote DC motor control system .Take the embedded microprocessor STM32F103 and the RF transceiver CC1101 as the core for the motor control system , and use the combination of the MOSFET and the relay for the motor control circuit;take the ultra-low-power MSP430 series micropro-cessor and the CC 1101 as the core for the wireless remote control of the motor system .This system has the characteristics of simple structure , perfect control and protection functions , and high universality .%无线电遥控式电机执行装置具有广阔的应用前景。该文提出一种无线电遥控式的直流电机控制系统，电机控制系统以嵌入式微处理器STM32F103与射频收发器CC1101为控制核心，并采用基于脉宽调制的MOSFET与继电器相结合的电机调速与正、反转控制电路；而无线遥控器以超低功耗的MSP430系列单片机与CC1101为核心，以实现对电机系统的无线遥控。该系统结构简单、控制与保护功能完善，通用性好。
High Temperature All Silicon-Carbide (SiC) DC Motor Drives for Venus Exploration Vehicles Project
National Aeronautics and Space Administration — This Small Business Innovation Research Phase I project seeks to prove the feasibility of creating high-temperature silicon-carbide (SiC) based motor drives for...
Biomolecule-functionalized polymer brushes.
Jiang, Hui; Xu, Fu-Jian
2013-04-21
Functional polymer brushes have been utilized extensively for the immobilization of biomolecules, which is of crucial importance for the development of biosensors and biotechnology. Recent progress in polymerization methods, in particular surface-initiated atom transfer radical polymerization (ATRP), has provided a unique means for the design and synthesis of new biomolecule-functionalized polymer brushes. This current review summarizes such recent research activities. The different preparation strategies for biomolecule immobilization through polymer brush spacers are described in detail. The functional groups of the polymer brushes used for biomolecule immobilization include epoxide, carboxylic acid, hydroxyl, aldehyde, and amine groups. The recent research activities indicate that functional polymer brushes become versatile and powerful spacers for immobilization of various biomolecules to maximize their functionalities. This review also demonstrates that surface-initiated ATRP is used more frequently than other polymerization methods in the designs of new biomolecule-functionalized polymer brushes.
Water Soluble Responsive Polymer Brushes
Directory of Open Access Journals (Sweden)
Andrew J. Parnell
2011-12-01
Full Text Available Responsive polymer brushes possess many interesting properties that enable them to control a range of important interfacial behaviours, including adhesion, wettability, surface adsorption, friction, flow and motility. The ability to design a macromolecular response to a wide variety of external stimuli makes polymer brushes an exciting class of functional materials, and has been made possible by advances in modern controlled polymerization techniques. In this review we discuss the physics of polymer brush response along with a summary of the techniques used in their synthesis. We then review the various stimuli that can be used to switch brush conformation; temperature, solvent quality, pH and ionic strength as well as the relatively new area of electric field actuation We discuss examples of devices that utilise brush conformational change, before highlighting other potential applications of responsive brushes in real world devices.
Permanent magnet motors from ABB eliminate gearboxes%ABB永磁电机在船舶上的应用
Institute of Scientific and Technical Information of China (English)
钱丽春
2004-01-01
Permanent magnet motor is synchronous and eliminates brushes, rotor windings ABB's permanent magnet motor is an AC synchronous motor. With such a motor, there is no rotor slip, which provides better accuracy than induct asynchronous, motors.
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.
Brushless DC motor control system based on expert PID%基于专家PID的直流无刷电机控制系统＊
Institute of Scientific and Technical Information of China (English)
张浩; 吴新开
2015-01-01
The brushless DC motor has the characteristics of time varing, nonliner, uncertainty and hardly modeling, so it is difficult to obtain ideal control effect by using conventional PID control. It is hoped to find a high-performance speed control scheme through the theory and practical research of expert PID. Based on the experiment platform of commonly used brushless motor speed control for multi rotor aircraft, the encoder is applied to measure the rotational speed and realize its closed-loop control. The introduction of brushless motor speed PID controller has opened up new ideas for motor control and attitude control of multi rotor aircraft.%由于直流无刷电机存在时变性、非线性、不确定性、难以建模等特点，采用常规的PID很难达到理想的控制效果。通过专家PID控制理论并结合实践研究，提出一种高性能的速度控制方案。基于多旋翼飞行器常用的无刷电机转速控制这一实验平台，采用编码器测速实现无刷电机的闭环控制。无刷电机速度PID控制器的引入，开辟了多旋翼飞行器电机控制和姿态控制的新思路。
Homopolar Motor and Brush Development Studies
2005-08-01
adjacent conductors, whereas voids can result in open circuits Build a Wear Model- eg Use wear fragment mass and size distribution data Rabinowicz ...expert consultants and universities. The primary universities involved were MIT (Prof. Ernie Rabinowicz ), Syracuse (Prof. Richard Vook), North Carolina...The temperature rise at sliding electrical contacts .......................... 29 E. Rabinowicz (Cambridge, MA, U.S.A.) Thermal stability in graphite
Why Is Brushing with Toothpaste Important?
... to your desktop! more... Why is Brushing With Toothpaste Important? Article Chapters Why is Brushing With Toothpaste ... mouth with a clean feeling. Is brushing with toothpaste enough to fight cavities and gum disease? No. ...
无刷直流电动机不导通相电流分析%Analysis of Floating Phase Current in Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
王璞; 解恩; 翟猛
2012-01-01
分析了无刷直流电动机在三相六状态及不同的PWM方式下,绕组续流期间不导通相电流,并且指出各有不同.对常用的各种PWM方式通过原理分析及数学推导,得出不导通相电流存在的时段和幅值趋势.并通过实验测试,验证了分析结果.%The floating phase current during the free-wheeling and the difference of the brushless DC motor operating in three-phase-six-states and different PWM modes were analysed. The conclusion of existing time and amplitude trend were achieved by theory analysis and mathematical deduction of common PWM modes. The result was verified through the experiment test.
Simulation of Brushless DC Motor Control System Based on Matlab%无刷直流电机控制系统的Matlab仿真
Institute of Scientific and Technical Information of China (English)
吴松华; 叶汉民
2011-01-01
通过对无刷直流电机控制系统的研究,提出了反电势控制方法.即通过线性分段法获得反电动势,构建无刷直流电机(Brushless DC Motor,BLDCM)的本体模块,采用双闭环控制方案(转速环由PID调节器构成,电流环由电流滞环调节器构成)建立仿真控制系统.利用仿真对所提出的方法进行了验证.
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.
The matlab simulation of brushless DC motor control system%无刷直流电机控制系统的matlab仿真
Institute of Scientific and Technical Information of China (English)
吴松华; 叶汉民
2011-01-01
通过对无刷直流电机控制系统的研究,提出了反电势控制方法.即通过线性分段法获得反电动势,构建无刷直流电机(brushless dc motor BLDCM)的本体模块,采用双闭环控制方案(转速环由PID调节器构成,电流环由电流滞环调节器构成)建立仿真控制系统.利用仿真对所提出的方法进行了验证.
Thavarajah, Rooban; Kumar, Madan; Mohandoss, Anusa Arunachalam; Vernon, Lance T
2015-09-01
Proper tooth brushing is a seemingly simple motor activity that can promote oral health. Applying health theories, such as the Information-Motivation-Behavioral Skills (IMB) model, Motivational Interviewing (MI) and Integrated Health Coaching (IHC), may help optimize tooth brushing technique in those with suboptimal skills. Some motor activities, including tooth brushing, may over time become rote and unconscious actions, such that an existing habit can inhibit new learning, i.e., exert proactive interference on learning the new skill. Proactive interference may impede the acquisition of new tooth brushing skills; thus, in this report, we: (1) Review how the habit of tooth brushing is formed; (2) Postulate how proactive interference could impede the establishment of proper tooth brushing retraining; (3) Discuss the merits of this hypothesis; and (4) Provide guidance for future work in this topic within the context of an approach to behavior change that integrates IMB, MI and IHC methodology.
Interfacing the septa movement (DC motors) equipment to the PS control system and the MIL1553 bus
Dehavay, Claude
1995-01-01
Continuing the rejuvenation of the PS Control system , this application replaces the Single Transceiver Hybrid used to interface the Septa Movement Fquipment by a G64 system connected to the VME crate via the MIL1553 bus. This note explains the G64 hardware interface and details the standard message as defined in the Control Protocole for Power Converter, RF and Stepping Motor equipment.
Bottle-Brush Brushes: Cylindrical Molecular Brushes of Poly(2-oxazoline) on Glassy Carbon
Zhang, Ning
2009-07-28
We report on the synthesis of brushes of bottle-brushes of poly(2-oxazoline)s on polished glassy carbon (GC) substrates. First, homogeneous and stable poly(2-isopropenyl-2-oxazoline) (PIPOx) brush layers with thicknesses up to 160 nm were created directly onto GC by the self-initiated photografting and photopolymerization (SIPGP) of 2-isopropenyl-2-oxazoline (IPOx). Kinetic studies reveal a linear increase in thickness with the polymerization time. In a second reaction, the pendant 2-oxazoline ring of the PIPOx brushes were used for the living cationic ring-opening polymerization (LCROP) with different substituted 2-oxazoline monomers to form the side chains. Also for the second surface-initiatedLCROPfrom the surface-bound macroinitiator brushes, the thickness increase with the polymerization time was found to be linear and reproducible. Characterization of the resulting bottle-brush brushes by FTIR spectroscopy,contact angle, and AFM indicates a high side chain grafting density and quantitative reactions. Finally, we have demonstrated the possibility of functionalizing the bottle-brush brushes side chain end groups with sterically demanding molecules. © 2009 American Chemical Society.
一种抑制无刷直流电机转矩脉动的新方法%A Method to Suppress Torque Ripple of Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
谢少华; 瞿遂春
2015-01-01
对无刷直流电机转矩脉动产生的原因进行全面分析，提出增加前级直流变换器抑制转矩脉动的新方法，使用buck直流变换器，通过调整逆变器的母线电压来抑制转矩脉动，在MATLAB/Simulink环境下基于该方法搭建无刷直流电机仿真模型，并对系统进行仿真分析。仿真结果表明，该方法能够有效抑制无刷直流电机转矩脉动。%Analyzes comprehensively the torque ripple causes of brushless DC motor, and proposes a new method of adding the first stage DC converter to control torque ripple. By using buck DC converter and adjusting bus voltage of the inverter to suppress the torque ripple, on the basis establishes brushless DC motor model in MATLAB/Simulink and simulates the system. The result indicates that the method suppresses the torque ripple of brushless DC motor effectively.
Interfacing the septa movement (DC motor) equipment to the PS control system and the MIL1553 bus
Dehavay, Claude
1993-01-01
Continuing the rejuvenation of the PS Control system , it is planned to replace the Single Transceiver Hybrid used to interface the Septa Movement Equipment by a G64 system connected to the VME crate via the MIL1553 bus. This note explains the G64 hardware interface and details the standard message as defined in the Control Protocole for Power Converter, RF and Stepping Motor equipment.
Modeling Method of Brushless DC Motor Based on MATLAB%基于MATL AB的无刷直流电机建模方法
Institute of Scientific and Technical Information of China (English)
郭丹蕊; 林晓焕; 单星; 汪通
2015-01-01
根据分析得到的理想状态下的无刷直流电机各个方程，结合Matlab/simulink里相应图形化模块来搭建电机模型，并在文中列举了几个重要模块的作用。结合所给参数仿真得出曲线图，说明搭建的模型有较好的实用价值，验证了模型的正确性。%According to the brushless DC motor of each equation in the ideal state of the analysis,combined with Matlab/simulink in the corresponding graphical module to build the motor model, and cited the role of several important modules in the text. Combined with the given parameters of the simulation results graph illustrating the build model has good practical value to verify the correctness of the model.
Simulation Analysis of Brushless DC Motors for Aircraft%飞机用无刷直流电动机系统仿真分析
Institute of Scientific and Technical Information of China (English)
马银龙; 尹航; 柯栋梁
2011-01-01
A novel method for modeling and simulation of the brushless DC motor system for Aircraft was presented. With this model,all the simulation of motor performance,fault protection,soft start can be realized. The mathematic model of the BLDCM was established. Under Simulink in Matlab 2010a,the simulation model of the BLDCM system can be modeled by the S-functions programming and modular design. Over-current,under-voltage and open phase protection were discussed to improve reliability. The reasonability was testified by the coincidence of the simulation results and theory analysis.%提出了一种新的飞机用无刷直流电动机的系统建模方法,该模型可以实现电机性能、故障保护、软起动的综合仿真.根据无刷直流电动机的数学模型,在Matlab 2010a的Simulink环境下,采用S函数和模块化建模方法,建立了相应的系统仿真模型.为提高可靠性,较详细地讨论了过流、欠压和缺相故障的保护.仿真实验结果与理论分析一致,验证了模型的合理有效性.
Directory of Open Access Journals (Sweden)
Safaa M. Z. Al-Ubaidi
2012-06-01
Full Text Available This paper presents an implementation of conventional PID (CPID controller using Ziegler-Nichols rules and fuzzy PD (FPD controller for position servo motor control based on Lab View (Laboratory Virtual Instrument Engineering Workbench Environment through Data Acquisition (DAQ Device PCI- 6521 of National Instrument's and Data Acquisition Accessory Board Model (CB-68LP.CPID controller is perhaps the most well-known and most widely used in industrial applications. However, it has been known that CPID controller generally don’t work well for non-linear systems, higher order and time-delayed linear system and particularly complex and vague system. To overcome these difficulties, this paper proposes to use the FPD controller for a servo motor system instead of CPID. The parameters of servo motor used are completely unknown. The FPD structure has two-input single-output and fairly similar characteristic to its conventional counterpart and provides good performance. Simple rules base are used for FPD (nine rules only. Performance evaluation was carried out via a comparison study for the proposed control scheme and other existing control scheme, such as CPID controller. The critical point for this experiment on position system is a steady state error and settling time. The performance showing that the FPD has less settling time and zero steady state error over its CPID. The algorithms of FPD and CPID controllers are implemented using PID, Fuzzy Logic and simulation toolkits of the Lab View environment.
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.
基于Matlab无刷直流电机控制系统仿真%The simulation of brushless DC motor control system based on Matlab
Institute of Scientific and Technical Information of China (English)
王亚茹; 宋晓梅; 何程; 巩学芳
2015-01-01
In order to reduce the design cost and save design time of brushless DC motor ,in Matlab/Simulink environment ,the control principle and the mathematical model of BLDCM are analyzed to conduct research related to control system .In the modular notion of control system ,by the combina‐tion of the isolated blocks and S‐function ,the model of BLDCM can be established .This system is con‐trolled by the speed and current double loop .Through a classical PID joined to the speed loop ,the ad‐justment of speed achieves smoothness .And a current controller is completed in the current loop on the principle of hysteresis current track PWM inverter .The simulation results prove that the system has good static and dynamic charactertics ,and verify the rationality and validity of this method .By studying the simulation model of BLDCM based on Matlab ,a new approach for designing and debug‐ging motors is provided .%为了降低无刷直流电机（brushless DC motor ，BLDCM ）的设计成本，节省设计时间，在Matlab／Simulink环境下，通过分析BLDCM 的控制原理及数学模型，进行BLDCM 控制系统的仿真研究。利用控制系统的模块化思想，分别建立独立的功能模块，再结合S函数，以此构建出BLDCM 控制系统的仿真模型。系统采用速度、电流的双闭环控制，在速度外环加入经典的PID控制以实现转速的平稳调节，电流内环控制采用滞环电流跟踪型PWM 实现。仿真结果表明，控制系统具有良好的静态、动态特性，同时验证了该方法的合理性和有效性。
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.
DC to DC converters: operation; Hacheurs: fonctionnement
Energy Technology Data Exchange (ETDEWEB)
Bernot, F. [Ecole d' Ingenieurs de Tours, 37 (France)
2002-05-01
This article deals with pulse width modulation (PWM) and pulse position modulation (PPM) DC to DC converters. A tri-phase PWM converter is made of 6 simple DC/DC converters grouped together into 3 reversible converters of the same type: 1 - single-quadrant voltage lowering converters (hydraulic analogy, study with ideal elements, full scheme with input and output filters); 2 - single-quadrant voltage raising converters (hydraulic analogy, operation); 3 - two quadrants reversible converters (structure construction, quadrants of operation, reversible converter connected to a DC motor); 4 - four-quadrants reversible converters; 5 - other converters structure (current converters and converters with intermediate storage, asymmetrical converters, converters with capacitive storage, insulated converters, resonating converters, status); 6 - conclusion. (J.S.)
Energy Technology Data Exchange (ETDEWEB)
Makkliang, Fonthip; Kanatharana, Proespichaya [Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Thavarungkul, Panote [Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Thammakhet, Chongdee, E-mail: chongdee.t@psu.ac.th [Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand); Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 (Thailand)
2016-04-21
A novel miniaturized “stir-brush microextractor” was prepared using a zinc oxide/hydroxylated multiwalled carbon nanotubes (ZnO/MWCNTs–OH) coated stainless steel brush connected to a small dc motor. The synthesized zinc oxide on each strand of stainless steel had a flower-like nanostructure when observed by a scanning electron microscope (SEM). This structure produced a large surface area before it was coated with the hydroxylated multiwalled carbon nanotubes sorbent. Under optimal conditions, the developed device provided a good linearity for the extraction of carbofuran and carbaryl, in the range of 25–500 ng mL{sup −1} and 50–500 ng mL{sup −1}, respectively, with low limits of detection of 17.5 ± 2.0 ng mL{sup −1} and 13.0 ± 1.8 ng mL{sup −1}. It also provided a good stir-brush-to-stir-brush reproducibility (% relative standard deviation < 5.6%, n = 6). The device was applied for the extraction and preconcentration of carbamate pesticides in fruit and vegetable samples prior to analysis with a gas chromatograph coupled with a flame ionization detector (GC–FID). Carbofuran was found at 9.24 ± 0.93 ng g{sup −1} and carbaryl was detected at 7.05 ± 0.61 ng g{sup −1} with good recoveries in the range of 73.7 ± 10.0% to 108.4 ± 2.6% for carbofuran and 75.7 ± 10.0% to 111.7 ± 5.7% for carbaryl. - Highlights: • A brush as the sampling tool was first introduced. • A novel miniaturized and portable stir brush microextractor was developed for carbamate pesticides extraction. • Large surface area of ZnO flower-like nanostructure coated with MWCNTs–OH on each brush fiber was observed.
Modeling and Implementation of Limited Angle Brushless DC Motor%有限转角直流无刷电机的建模与实现
Institute of Scientific and Technical Information of China (English)
苏宇; 张涛; 王相阳; 王金波
2013-01-01
有限转角直流无刷电机是靠改变输入的PWM的占空比驱动的,由于系统存在多变量和非线性,传统的方法难以建立准确的模型,导致控制精度低.提出一种采用对输入PWM进行采样计数的方法建立PWM与电机电枢两端电压的关系,再辅助ISE开发FPGA对电机进行模型实现的新方法,建立了一套测试系统中有限转角直流无刷电机仿真系统模型.通过模型校准和仿真结果分析,证明了方案的有效性.将模型进行FPGA实现,代替实际电机应用于测试系统中,验证了模型具有高精度与可靠性.%Limited angle brushless DC motor is driven by PWM which varies with the changing duty cycle, resulting in low precision of the traditional control system, so a new method was proposed to establish the relationship between the PWM and voltage across the motor armatures and to realize the model on FPGA with the help of ISE, Then a simulation model was built up. The method was proofed to be effective after calibrating and analyzing the simulation model. As the result of the real experiment implementing on FPGA and used in the test system instead of the actual motor, the model based on the method has high accuracy and reliability.
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.
Simulation of Double- Motor Synchronous Control System for Brushless DC Motor%双无刷直流电机同步传动系统仿真研究
Institute of Scientific and Technical Information of China (English)
曾丽; 段文潇
2011-01-01
针对双电机同步驱动控制在负载发生扰动时同步控制性能较差的问题，建立了双无刷直流电机偏差耦合同步控制系统的数学模型，提出了智能PI控制器作为速度补偿器的同步控制方案．智能PI控制器可有效缓解普通PI控制系统快速性和平稳性的矛盾，使系统具有更高的同步控制精度．仿真结果表明，采用智能PI控制的系统优于采用普通PI控制的系统．%For the problem of synchronous performance of double - motor being at a low - level with disturbance of the drive motors＇ load, the math model of double - motor＇ s sync - drive control system for brushless DC motor is built, and based on the relative coupling strategy and the intelligent PI as speed compensator to control the double -motor＇s relative is presented. Compared with common PI control system, the intelligent PI control system suc- cessfully solves the contradiction between quickness and smoothness. Simulation results show that the system of rel- ative coupling which adopt intelligent PI is better than common PI＇ s.
Thermal analysis of high speed permanent magnet brushless DC motor%高速永磁无刷直流电机的热分析
Institute of Scientific and Technical Information of China (English)
杜国华; 房建成; 刘西全; 周银锋
2012-01-01
为了解决高速永磁无刷直流电机温升过高带来的磁性能降低及绕组绝缘破坏等问题,对高速电机的温度分布及改进措施进行了一系列研究.采用集中参数法建立了电机热网络数学模型,推导出电机损耗、热导和温度之间的解析方程;建立了基于ANSYS/Work-bench的电机三维有限元模型,对其进行稳态热分析,从而得到电机整体的温度分布,验证了电机热网络模型的正确性;提出了改变转子护套材料及电机轴打孔两种措施.分析结果表明：改进后的电机转子部分温度有了明显降低,其中护套温度降低了约34℃,永磁体约54℃,解决了电机的局部温度过高问题.%In order to solve the problems of reduction in magnetic performance and winding insulation damage caused by high temperature in high speed permanent magnet brushless DC motor, a series of research on temperature distribution and improvement was carried out. The thermal network mathematic model was established by lumped parameters method. And an analytic equation accounting for the relationship among motor loss, thermal conductance and temperature was derived. Besides, the motor 3D finite element model was built based on the ANSYS/Workbench, and steady-state analysis was conducted. The temperature distribution of the whole motor was achieved, which verified the results of thermal network model. And two methods inclu- ding changing the retaining sleeve material and drilling holes on shaft were proposed to solve the temperature problem. According to the analysis results the rotor temperature has dropped obviously, especially the retaining sleeve and permanent magnet with a temperature decrease of about 54℃and 54℃ respectively.
Cho, Chahee Peter
1995-01-01
Until recently, brush dc motors have been the dominant drive system because they provide easily controlled motor speed over a wide range, rapid acceleration and deceleration, convenient control of position, and lower product cost. Despite these capabilities, the brush dc motor configuration does not satisfy the design requirements for the U.S. Navy's underwater propulsion applications. Technical advances in rare-earth permanent magnet materials, in high-power semiconductor transistor technology, and in various rotor position-sensing devices have made using brushless permanent magnet motors a viable alternative. This research investigates brushless permanent magnet motor technology, studying the merits of dual-air gap, axial -field, brushless, permanent magnet motor configuration in terms of power density, efficiency, and noise/vibration levels. Because the design objectives for underwater motor applications include high-power density, high-performance, and low-noise/vibration, the traditional, simplified equivalent circuit analysis methods to assist in meeting these goals were inadequate. This study presents the development and verification of detailed finite element analysis (FEA) models and lumped parameter circuit models that can calculate back electromotive force waveforms, inductance, cogging torque, energized torque, and eddy current power losses. It is the first thorough quantification of dual air-gap, axial -field, brushless, permanent magnet motor parameters and performance characteristics. The new methodology introduced in this research not only facilitates the design process of an axial field, brushless, permanent magnet motor but reinforces the idea that the high-power density, high-efficiency, and low-noise/vibration motor is attainable.
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。
Simulation of Brushless DC Motor with Kalman Filter%基于卡尔曼滤波器的无刷直流电动机仿真
Institute of Scientific and Technical Information of China (English)
吕志宽; 李声晋; 卢刚; 周勇
2011-01-01
对已有的无刷直流电动机数学模型进行详细的分析,并提出了一种基于卡尔曼滤波器的无刷直流电动机调速系统建模仿真方法.在Matlab/Simulink环境下,采用独立功能模块与S函数相结合的方法,依据现有电机控制系统构造了一种无刷直流电动机的调速系统仿真模型.仿真系统进行PI转速调节,电机反馈转速经卡尔曼滤波器滤波.仿真和试验结果与理论分析一致,证明所建立的无刷直流电动机状态方程正确,卡尔曼滤波器校正矩阵递推公式合理,为现实中的电机控制系统设计和调试提供了新方法.%Mathematical model of the Brushless DC motor was fristly analyzed. Furthermore, a new modeling and simulation method of the speed control system of BLDCM based on Kalman Filter was proposed. In Matlab/Simulink, the method of independent function models combining S-functions was adopted and simulation model of the speed control system was built on the basis of the electric machine control system. PI speed control was conducted with the simulation model and the electric machine speed feedback was filtered by Kalman Filter. The conformity simulation and experiment results and between theoretical analysis proves that the brushless DC motor state space formula is correct,that Kalman Filter correction matrix recursion formula is reasonable,and that the method provides new method for the electric machine control system design and adjustment.
PWM调制下无刷直流电机的转矩脉动抑制%Torque Ripple Reduction of Brushless DC Motors by PWM Modes
Institute of Scientific and Technical Information of China (English)
孟光伟; 李槐树; 熊浩
2011-01-01
分析无刷直流电机在PWM调制下稳态时的换相过程,通过在换相期间的PWM调制来实现高、低速条件下的换相转矩脉动补偿控制,确定了保持换相期间非换相相电流幅值不变的换相时间.分析PWM调制方式对三相六状态二二导通无刷直流电机控制系统的影响,提出了在PWM-ON-PWM调制方式下的换相转矩脉动补偿控制,不但能够完全消除非换相期间由于关断相出现电流而引起的电磁转矩脉动,而且能够完全补偿由于换相而引起的转矩脉动,实现电机在低速和高速时的无转矩脉动控制.%The steady commutation process of brushless DC motor by PWM modes was analyzed, and realized phase conversion torque ripple compensation control under both low speed and high speed operation by PWM control in commutation period,and confirmed commutation time to hold amplitude of current in commutation period. The effect by PWM modes on a three-phase six-state 120°conduction brushless DC motor was analyzed,and proposed torque ripple compensation control in PWM_ON_PWM mode, which can not only entirely eliminate torque ripple resulted from the current emerging in the turn-off phase during non-commutation period but also compensate torque ripple caused by the commutation current during commutation period. The torque ripple can be effectively reduced under both low speed and high speed operation using torque ripple compensation control in PWM ON PWM mode.
Speed control of DC motor based on exact linearization%精确线性化电动机转速控制
Institute of Scientific and Technical Information of China (English)
史晓阳; 鲁芳; 刘艳萍
2012-01-01
基于精确线性化方法．设计了两种他励直流电动机转速非线性控制器，并对其性能进行了比较。从他励直流电动机的数学模型出发，运用微分几何理论，讨论给出了他励直流电动机可进行状态反馈线性化的条件。在此基础上，通过选择不同输出函数，设计了状态反馈控制器和输出反馈控制器，并研究了这两种控制器的动态响应特性、抗干扰能力和稳定运行区域。结果表明，对于他励直流电动机数学模型而言，输出反馈线性化控{l；6器相对于状态反馈线性化控制器．具有控制器结构简单、运行稳定、动态性能好、抗干扰能力强等优点。%Based on the feedback linearization method, two different speed nonlinear controllers of are designed by choosing different output functions, and its performance are studied. Based on the mathematical model of separately excited DC motor and differential geometry theory, state feedback linearization conditions are given. State feedback controller and output feedback controller are designed, and the dynamic response characteristics, the anti-interference ability and stable operation areas are discussed of the two controllers. The results show that, for separately excited DC motor mathematical model, compared to the state feedback hnearization controller, the output feedback linearization controller has a more simple structure, better stable operation and dynamic performance, stronger anti-interference capability, et al.
晶闸管直流电机系统的异常暂态研究%Study of abnormal transient of thyristor driven DC motor
Institute of Scientific and Technical Information of China (English)
李娜; 刘明光; 杨恒
2009-01-01
According to the pulsating current of thyristor driven DC motor,the transient process of abnormal system operation is modeled and analyzed and its mathematic expressions are deduced. With an actual system as an example ,the transient process of abnormal operation is described. According to the nonlinearity of the DC motor magnetic field, its dynamic simulation model is built and the over -current and over-voltage produced during abnormal operation is simulated. Experimental results show that,the current is doubled or tripled suddenly,and the higher the terminal voltage or speed is,the higher the instantaneous over-current will be. The sudden current increase will result in over-voltage at both sides of the transformer ,which may damage the rectifier,capacitor and insulation.%针对晶闸管直流电机系统电流脉动的特点,对系统异常运行时的暂态过程进行了建模与分析.推导出系统异常运行时暂态过程的数学表达式.以一个实际系统为例,对异常运行时系统的暂态过程进行计算.考虑直流电机磁路的非线性建立了系统的动态仿真模型,对异常运行时系统产生的过电流及过电压进行仿真,通过实验对理论及仿真结果进行验证.结果表明,系统异常运行会使回路电流瞬时突增2～3倍,且电机端电压越大、电机运行速度越高,瞬时产生的过电流也就越大.异常运行时变压器原、副边分别会产生高出额定值2～3倍左右的过电压,可能使整流器烧毁、保护电容损坏、绝缘击穿.
Sliding-mode prediction control of networked DC servo motors%网络直流伺服电机滑模预测控制
Institute of Scientific and Technical Information of China (English)
尹洋; 夏立; 宋立忠
2011-01-01
利用滑模变结构控制方法对存在丢包情况下的网络直流伺服电机控制系统的鲁棒性问题进行了研究.对于控制器和执行器之间网络存在数据丢包的情况,设计了基于滑模预测控制律的网络丢包补偿模型,包括滑模预测控制产生器和丢包预测补偿器2个部分.研究了相应的动态补偿策略,使在每一时刻系统选取的实际控制量都是执行器端所提供的最新控制信号或最优滑模预测控制信号,使网络丢包对系统性能的影响降到最小.在一定丢包率的网络控制环境下,分别对标称及参数不确定的直流伺服电机进行了仿真分析,其结果表明了所提算法的合理性和有效性.%The packet loss of networked DC servo motor control system is studied by the sliding-mode control method to improve its robustness. A network packet-loss compensation model based on the sliding -mode predictive control is designed for the packet-loss between controller and actuator,including the sliding-mode predictive controller and the predictive packet-loss compensator. The corresponding compensation strategy is introduced,which selects the latest control signal supplied by the actuator or the optimal sliding-mode predictive control signal as the actual control signal to lower the influence of network packet-loss on system performance. Simulative analysis is carried out respectively for the nominal and parameter-uncertain DC servo motors in the networked control system with certain packet-loss rate,which shows the rationality and effectiveness of the proposed algorithm.
Design of C8051F21-based control system for DC motors%基于C8051F的直流电动机控制系统设计
Institute of Scientific and Technical Information of China (English)
张秀国
2013-01-01
通过对直流电动机复杂控制系统的深入剖析，设计出以新型单片机为主体的直流电动机反馈控制系统。以单片机作为系统的控制核心，将模糊PID作为系统的主要控制思想，使直流电动机的输出调压范围在250~440 V。设计中主要运用了单片机的优势，使电机控制系统的工作稳定性得到较大提升，因此具有非常重要的现实意义。%A MCU⁃based new feedback control system for DC motors was designed by the in⁃depth analysis of the complex control system for DC motors. In this paper,the MCU is taken as the control core of the system and fuzzy PID as the main con⁃trol thought. Both of them make the output regulation range of DC motors to be within 250~400 V. Since the SCM superiority is employed in the design,the working stability of the motor control system is greatly improved. Therefore,it has very important practical significance.
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.
Institute of Scientific and Technical Information of China (English)
张力; 季小尹; 张克涵
2012-01-01
根据无人水下航行器的任务特点,研制出无位置传感器的双转子对转无刷直流电机推进动力装置.介绍了无刷直流电机利用专门设计的转换电路,直接检测电机绕组线电压获得功率管驱动信号的方法,研究了无位置传感器无刷直流电机的起动方法,通过样机实验验证了系统设计的合理性.%As to the specific assignment autonomous underwater vehicle, its pushing momentum device which use sensorless double inverse rotors brushless DC motor is developed. The method which use a designed specially conversion circuit measuring the line voltage of motor's winding directly to achieve the power tubes' driving signal is introduced in this paper, the method of sensorless brushless DC motor's startup is also studied. It is showed that the design is rational by prototype trial of a brushless DC motor.
Institute of Scientific and Technical Information of China (English)
史忠震; 杨立; 李青青; 许贞俊
2013-01-01
利用Ansys有限元分析软件对永磁无刷直流电动机进行了温度场分布研究,应用传热学理论建市了电动机三维暂态温度场计算模型,根据永磁直流无刷电机内热交换理论给出了边界条件,并在求解域内给出了一定的假设,对其进行分析计算,得到了永磁直流无刷电机各部分温度场分布,并与实测结果基本一致,说明该分析方法对于永磁直流无刷电机的设计和优化具有一定的参考意义.%The distribution of the temperature field of the permanent magnet brushless DC motor was analysed by ansys finite element analysis software.A motor three-dimensional transient temperature field calculation model was establised based on heat transfer theory.Boundary conditions were given by the permanent magnet brushless DC motor heat exchange theory,and the certain assumptions in the solution domain were given.The temperature distribution of the various parts of permanent magnet brushless DC motor was achieved by its analysis and calculation,which was consistent with the measured results.The analysis method for permanent magnet brushless DC motor design and optimization has certain reference value.
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.
永磁无刷直流电机及其控制%Permanent-Magnet Brushless DC Motor and Its Control
Institute of Scientific and Technical Information of China (English)
夏长亮; 方红伟
2012-01-01
The permanent-magnet brushless DC motor（BLDC motor） has achieved a brilliant application in aerospace,military,automotive,office automation and household equipment industries,since it has the advantages of high efficiency,long lifetime,low noise and good torque-speed characteristics.The basic structure and operation of the BLDC motor is introduced,and various typical topologies of its driving circuits are also compared.Moreover,the torque ripple reduction,sensorless control,and flux-weakening speed control are investigated.Finally,the applications of BLDC motor are drawn and its development trend is discussed.%无刷直流电机因其高效率、长寿命、低噪声及良好的机械特性等优点,在航空、军事、汽车、办公自动化、家用电器等行业内得到了广泛的应用。本文系统阐述了无刷直流电机的基本结构和工作特点,比较分析了无刷直流电机几种典型的驱动电路拓扑结构。同时,对无刷直流电机的转矩波动抑制、无位置传感器控制、弱磁调速等技术进行了分析。最后,对其应用及未来发展趋势进行了探讨。
Institute of Scientific and Technical Information of China (English)
李楠; 陈韶飞; 薛方正; 许威
2011-01-01
The paper discusses the characteristic of the robot motion control algorithm, which has important influence to the road-holding of robot. After analyzing the mathematical model and control system, the human-simulated intelligent control (HSIC) is applied to the robot DC-motor motion control system. Improved Genetic Algorithm(IGA) is used to optimize the parameters for HSIC.Compared with PID controller, the HSIC controller has more effective control on motor, improves the performance of robot.%讨论了当前足球机器人运动控制系统的控制算法对足球机器人运动性能的影响.在分析了足球机器人运动控制系统组成和电机数学模型的基础上,对足球机器人运动控制器采用多模态控制的仿人智能控制(Human-Simulated Intelligent Control,HSIC)算法,利用改进的遗传算法(Improved Genetic Algorithm,IGA)对仿人智能控制器参数进行优化.通过与目前普遍采用的常规PID控制器作对比实验,表明采用IGA参数整定后的HSIC控制器对电机具有更好的控制品质,并改善了足球机器人的运动性能.
Makkliang, Fonthip; Kanatharana, Proespichaya; Thavarungkul, Panote; Thammakhet, Chongdee
2016-04-21
A novel miniaturized "stir-brush microextractor" was prepared using a zinc oxide/hydroxylated multiwalled carbon nanotubes (ZnO/MWCNTs-OH) coated stainless steel brush connected to a small dc motor. The synthesized zinc oxide on each strand of stainless steel had a flower-like nanostructure when observed by a scanning electron microscope (SEM). This structure produced a large surface area before it was coated with the hydroxylated multiwalled carbon nanotubes sorbent. Under optimal conditions, the developed device provided a good linearity for the extraction of carbofuran and carbaryl, in the range of 25-500 ng mL(-1) and 50-500 ng mL(-1), respectively, with low limits of detection of 17.5 ± 2.0 ng mL(-1) and 13.0 ± 1.8 ng mL(-1). It also provided a good stir-brush-to-stir-brush reproducibility (% relative standard deviation < 5.6%, n = 6). The device was applied for the extraction and preconcentration of carbamate pesticides in fruit and vegetable samples prior to analysis with a gas chromatograph coupled with a flame ionization detector (GC-FID). Carbofuran was found at 9.24 ± 0.93 ng g(-1) and carbaryl was detected at 7.05 ± 0.61 ng g(-1) with good recoveries in the range of 73.7 ± 10.0% to 108.4 ± 2.6% for carbofuran and 75.7 ± 10.0% to 111.7 ± 5.7% for carbaryl.
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.
Quad-copter UAV BLDC Motor Control: Linear v/s non-linear control maps
Directory of Open Access Journals (Sweden)
Deep Parikh
2015-08-01
Full Text Available This paper presents some investigations and comparison of using linear versus non-linear static motor-control maps for the speed control of a BLDC (Brush Less Direct Current motors used in quad-copter UAV (Unmanned Aerial Vehicles. The motor-control map considered here is the inverse of the static map relating motor-speed output to motor-voltage input for a typical out-runner type Brushless DC Motors (BLDCM. Traditionally, quad-copter BLDC motor speed control uses simple linear motor-control map defined by the motor-constant specification. However, practical BLDC motors show non-linear characteristic, particularly when operated across wide operating speed-range as is commonly required in quad-copter UAV flight operations. In this paper, our investigations to compare performance of linear versus non-linear motor-control maps are presented. The investigations cover simulation-based and experimental study of BLDC motor speed control systems for quad-copter vehicle available. First the non-linear map relating rotor RPM to motor voltage for quad-copter BLDC motor is obtained experimentally using an optical speed encoder. The performance of the linear versus non-linear motor-control-maps for the speed control are studied. The investigations also cover study of time-responses for various standard test input-signals e.g. step, ramp and pulse inputs, applied as the reference speed-commands. Also, simple 2-degree of freedom test-bed is developed in our laboratory to help test the open-loop and closed-loop experimental investigations. The non-linear motor-control map is found to perform better in BLDC motor speed tracking control performance and thereby helping achieve better quad-copter roll-angle attitude control.
Institute of Scientific and Technical Information of China (English)
肖金凤; 肖杞铭; 曾铁军
2016-01-01
The available torque ripple suppression method of brushless DC motor has unsatisfactory suppression effect,or good ripple suppression effect while owning complicated learning algorithm,and is bad for promotion. To solve these problems, the field⁃oriented control system of the brushless DC motor was designed,which combines the RBF neural network and field⁃oriented control,and uses Luminary 615 microcontroller and brushless motor dedicated chip MC33035. The Visualbasic⁃based upper computer monitoring system matching with the motor was developed,which can realize the graphical display of parameters such as rotate speed and setting of motor parameters with low cost. The experimental results show that the designed RBF field⁃oriented control system of brushless DC motor has small torque ripple and high control accuracy.%针对现有无刷直流电机转矩脉动抑制方法存在抑制效果不理想，或脉动抑制效果好但学习算法复杂，不利于推广的问题，将RBF神经网络与磁场定向控制相结合，选用Luminary 615微控制器和无刷电机专用芯片MC33035，设计了无刷直流电机磁场定向控制系统。并开发基于Visual Basic的配套电机上位机监控系统，能在低成本下实现转速等参数的图形化显示及电机参数等的设置。实验结果表明，所设计的无刷直流电机RBF磁场定向控制系统转矩脉动小、控制精度高。
无刷直流电机控制系统的设计研究%Design Study on the Brushless DC Motor Control System
Institute of Scientific and Technical Information of China (English)
王硕; 安霆
2014-01-01
为深入研究无刷直流电机的控制问题，基于PIC16 F877单片机构建了电机控制系统；采用绕组Y联结三相全控桥式电路设计了两两导通式换相控制模块，并给出了控制字表；研究了基于PWM法的变压调速技术，并给出了正、反转控制方法；另外，还对软件设计中的各程序模块进行了阐述。%In order to study the control problem of brushless DC motor deeply, this paper designs a control system based on the PIC16F877 single chip computer.It designs the commutation control module of two-two con-duction type based on three phase full-controlled bridge circuit of Y coupling, and presents the control digital ta-ble.It also studies the technology of adjusting speed by changing voltage based on PWM method, and shows the control method of forward and reverse rotation.The paper also elaborates the software design in the end.
无刷直流电机转子位置检测方法综述%Summary on Rotor Position Detection Method for Brushless DC Motors
Institute of Scientific and Technical Information of China (English)
赵一衡; 顾伟康; 陈亚彬; 曹翔
2014-01-01
由于受到传统开关器件的限制，大电流开关电源存在功率小、效率低等问题，因此在对PWM软开关技术进行分析后，利用AT89 C52单片机的中断方式输出频率和占空比可调的PWM脉冲，控制大功率开关管GT40 T101的通断，从而实现以模拟继电器的方式控制电路的通断。通过搭建电路验证了PWM软开关在控制大功率电源方面的优越性，对于实际的电气工程应用具有一定的参考价值。%The brushless DC motor (BLDCM) is an advanced mechanical electronic device.Rotor position detection method is an important part of the BLDCM.Traditional method with position sensor is not suitable the need for the current applications because of its own shortcomings, so the position detection method has been the research hotspot recently.The basic principle and research situation of sensorless detection methods are introduced , and their advantages and disadvantages are compared .It provides a certain theoretical basis for researching on sensorless and has certain value.
Institute of Scientific and Technical Information of China (English)
孙颖; 张建成
2016-01-01
According to the shortcomings of photovoltaic grid connected inverter with high failure rate, high harmonic content, and complex control, a utility method of photovoltaic grid connected with DC-synchronous motor is proposed. Photovoltaic supply power is for DC motor in this photovoltaic grid connected system, and DC motor drives synchronous motor coaxial rotation, which realizes the conversion between DC and AC power. The grid connected control system includes maximum power point tracking control, motor speed control and synchronous motor terminal voltage control. The photovoltaic grid connection can be achieved when synchronous motor meets grid conditions. When connected to grid, the output of synchronous motor varies with the output of the photovoltaic. Simulative results verify the feasibility of the method based on MATLAB/Simulink. The grid voltage and current waveform are good, and active and reactive power can be provided to improve the power factor of the grid.%针对光伏并网逆变器存在故障率高、谐波含量大、控制复杂等问题，提出一种实用的光伏电源利用直流-同步电机并网的方案。该光伏并网系统中光伏电源为直流电机供电，直流电机带动同步电机同轴旋转，实现直流与交流电能之间的转换。并网控制系统包括光伏阵列最大功率跟踪控制、电机转速控制和同步电机端电压控制，当自动装置检测和判断同步电机满足并网条件时合闸并网。光伏系统并网后，同步电机的输出功率跟随光伏阵列输出功率的变化而变化。MATLAB/Simulink 仿真验证了该并网方案的可行性，该方案得到的并网电压、电流波形质量好，能够同时向电网提供有功和无功功率，有利于改善电网功率因数。
Design of PLC Program of DC Motor Speed Regulation Based on PID Algorithm%基于PID算法的直流电机调速的PLC程序设计
Institute of Scientific and Technical Information of China (English)
王海涛; 吴钦木; 韦书龙; 刘江宁
2012-01-01
Both ends of armature voltage of DC motor are used as feedback terminal. The Siemens $7-200 PLC is used as controller. The PID loop control instruction is used to make calculation. The PWM wave is output and the DC motor speed regulation is implemented.%以直流电机电枢两端电压作为反馈，采用西门子S7-200PLC作为控制器，利用其PID回路控制指令进行计算，然后输出PWM波，达到对直流电机转速进行调节的目的。
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.
Institute of Scientific and Technical Information of China (English)
吴楠
2014-01-01
On the basis of 51 on the microcontroller as the core of the DC motor speed control system have been studied, and the use of internal microcontroller timer interrupt function generates a different duty cycle PWM signal to adjust the speed of a DC motor, and can adjust its realization Reversible, acceleration and deceleration function.%在以51单片机为核心的基础上，对直流电机的调速系统进行了研究，并利用单片机内部定时中断功能而产生PWM不同占空比信号来调节直流电机的转速，同时可以实现调节其正反转、加减速的功能。
Institute of Scientific and Technical Information of China (English)
王宗培; 陈敏祥
2012-01-01
电动机的电枢主电路包括:电枢绕组电路和电源二部分,属运动控制类的各种交流电动机,具有多相交流电枢绕组电路和逆变器供电的电源.与传统直流电动机原理一样的New DCM,具有直流的电枢绕组电路,通过电子换向器与直流电源相连.逆变器和电子换向器都是功率开关管的桥式电路,硬件电路上不易区分,容易混淆.本文用实例说明电子换向器不是逆变器,换向器构筑直流电枢绕组电路的独特功能,使得它与交流电枢绕组电路完全不同,电枢绕组电感对电动机运行性能的影响也随之不同.%The motor armature main circuit including: the armature winding circuit and power supply, all kinds of motion-control AC motors have the multiphase ac armature winding circuit and inverter power supply. The New DCM , with same principles of the traditional DC machines, has the DC armature winding circuit connected to DC power through electronic commutator. Inverter and electronic commutator is not easy to distinguish from hardware circuit structure, easy to confuse. This paper demonstrates the electronic commutator not inverter, the unique functions of the electronic commutator is to make the armature winding circuit as DC circuit, therefore , the armature winding circuits between New DCM and AC motor are completely different, the influences of the armature winding inductance to motor performance are different , too.
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.
多电机共直流母线交流传动节能系统结构研究%Study of Structure of Common DC Bus Multi-motor AC Drive Energy-saving System
Institute of Scientific and Technical Information of China (English)
李继方; 汤天浩; 姚刚
2011-01-01
In the process of industrial production, in order to save the energy, usually a common DC bus multi-motor structure is used to recycle and utilize the electrical power generated by the motors,which is running in the second or fourth quadrant, work in the braking generation state. Firstly, the energy saving principle of the common DC bus multi-motor AC drive system was analyzed. And secondly, the control structure of common DC bus multi-motor AC drive system was categorized according to the different processing methods for the feedback electrical energy. At the same time, the performance of each system structure was analyzed and the applicable situation was pointed out. Finally, a new scheduling and coordinating energy-saving system structure for common DC bus multi-motors was proposed. Simulation results show that this structure is effect for common DC bus multi-motor AC drive energy-saving system and has advantages over other structures.%在工业生产过程中,为了节约能源,通常采用多个电机共用一条直流母线的结构,回收并利用电机运行在第2或第4象限处在制动发电状态所再生的电能.首先分析了多电机共直流母线交流传动节能系统工作原理,根据制动状态电机回馈总能量大于耗能状态电机耗电总能量的处理方式不同,对多电机共直流母线交流传动节能系统的结构进行分类,分析各种结构的性能,指出其适用场合.最后给出一种新的多电机共直流母线协调调度节能的结构,仿真结果验证了该结构的可行性,与其他结构相比具有减小直流母线电压波动、减少充放电次数、降低系统成本等优点.
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.
Institute of Scientific and Technical Information of China (English)
李尉; 宋保维; 胡欲立
2011-01-01
Based on the Magnet software, a leakage magnetic flux of a permanent magnet DC motor for the propulsion of a certain underwater vehicle is numerically simulated by a finite element method, and the numerical relation between the leakage magnetic strength and the distance of the DC motor is obtained. Furthermore,a good method is presented to analyze a disadvantageous influence of the leakage magnetic flux of a permanent magnet DC motor for the propulsion of underwater vehicles to their nearby electronic instruments and equipments.%基于Magnet软件,对某型水下航行器推进用永磁直流电机漏磁场进行了有限元数值仿真,得到了电机漏磁场强度与电机距离之间的数值关系,也为分析水下航行器推进电机漏磁场对其附近电子仪器设备带来的不利影响,提出了一个良好的方法.
Design of DC motor speed control system based on single-chip microcomputer%基于单片机的直流电机调速系统的设计
Institute of Scientific and Technical Information of China (English)
李美艳
2016-01-01
为了实现对直流电机控制的需求，提出了一种基于单片机为核心的直流电机调速系统设计方案，并完成系统的软硬件设计。该系统的硬件部分主要用单片机控制输入信号，软件部分采用C51进行编程，能够完成对直流电机的速度控制。实际应用表明，该系统具有操作简便、调速准确的特点，达到了设计要求。%In order to satisfy the requirement of the DC motor control, the design of the DC motor speed control system based on single-chip microcomputer is designed in this paper. The hardware system is used to produce the input signals of single-chip microcomputer. The software system adopts the c software as development environment, able to achieve the DC motor speed control. The experiment and application show that this test system has good performance, and achieve the design requirement.
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.
Design of Hollow Cup DC Motor Servo Driver Based on ARM%基于ARM的空心杯直流电机伺服驱动器设计
Institute of Scientific and Technical Information of China (English)
吴方勇; 田伟程
2012-01-01
The structure and control of hollow cup DC motor have undergone great changes in recent years, therefore DC motor control system entirely accomplished by hardware circuit was complex, difficult to adjust, low reliable and lack of flexibility, therefore we design the servo driver of hollow cup DC motor based on ARM MCU. The paper gives the digital PID control algorithm and the realization of separation points of PID control algorithm,the CAN bus technology is used in the servo drive applications.%应用ARM微处理器,设计了空心杯直流电机的伺服驱动器,探讨了积分分离PID控制算法在ARM处理器上的实现,同对研究了CAN总线技术在本伺服驱动器上的应用,提高了伺服控制的实时性、可靠性和信号传输距离.
直流电机励磁与风机优化控制的研究与应用%Research and application of DC motor excitation and fan control
Institute of Scientific and Technical Information of China (English)
仝玉华
2016-01-01
由于非调速系统的直流电机背包风机及直流电机励磁控制在设计上存在缺陷，在轧机换辊及处理断带故障期间，背包冷却风机及直流电机励磁回路仍然正常运行，造成了大量的电能浪费，增加了吨钢电耗，制约了冷轧效益的提高。%due to the defects in the design of non speed control system of DC motor Backpack Blower and the DC motor excitation control, in mill for roller and processing fault zone during the period of the fault and rucksack cooling fan and DC motor excitation circuit still normal operation, resulting in a large amounts of electrical energy waste, an increase of electricity consumption per ton of steel, which restricts the improvement of cold rolling efficiency.
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.
基于DSP的小功率无刷直流电动机驱动器设计%Design of Low-power Brushless DC Motor Driver Based on DSP
Institute of Scientific and Technical Information of China (English)
侯玉宝; 欧阳宁; 王景芳
2012-01-01
There was an increasing demand for low power brushless DC motor in the appliance industry nowadays , in order to meet the requirements of higher performance about the motor control system, a low power brushless DC motor drive was designed out in this paper using TFs dedicated motor control chip TMS320F2812 digital signal processor. The hardware and software structure and control strategy of the drive were introduced in detail, and the experimental results show that the system has the characteristics of shorter response time, better steady performance and anti-interference ability.%现在家电行业对小功率无刷直流电动机的需求日见增多,为了满足用户对电机控制系统产品性能的更高要求.采用TI公司的数字信号处理器TMS320F2812专用电机控制芯片,设计了一种小功率无刷直流电动机的驱动器.详细介绍了该驱动器的硬件电路组成和软件结构及控制策略,通过实验结果表明该系统响应时间短,稳态性能好,抗干扰能力强等特点.
DC Motor Simulation Based on the Matlab/Simulink%基于Matlab/Simulink三相桥式整流电路的直流电机的仿真
Institute of Scientific and Technical Information of China (English)
高士君; 刘建平
2012-01-01
The paper takes rectification of three phase power as DC motor source,and computes the reactance in the circuit and simulation through the Matlab.Taking double pulses and its carrier wave＇s frequency is taking from the power lines triggers the thyristor.Meanwhile,regulating the trigger angle of thyristor can adjust the output voltage of circuit dynamically.The paper also calculates the stepping resister and constructs the simulation circuit.The result of simulation can proves the design of circuit and its parameters is right and suitable.At the final of paper,introducing Powergui module in the Matlab and advances two theoretic measures to manage the current harmonics.%该文对三相交流电进行整流,以直流电机为负载,进行Matlab仿真并对电路中的电抗参数进行计算。使用了电网侧线电压作为载波对晶闸管进行双脉冲触发,且晶闸管触发角可以依据负载的电压实时进行调节。该文还对电机转子串电阻启动的参数进行计算、电路模型搭建、仿真。该文还介绍Matlab中Powergui的使用说明,并阐述一些电流谐波治理方案。
电动汽车用无刷直流电机控制器设计%Controller Design for DC Brushless Motor of Electric Vehicle
Institute of Scientific and Technical Information of China (English)
舒雄; 杜荣华; 柴健; 舒刚华; 李亚中
2015-01-01
针对四轮独立驱动电动汽车所用电机须调速性好、可靠性高的特点，从工程应用出发，设计一种以dsPIC及MC33035为核心的无刷直流电机控制器。阐述了控制方案及工作原理，给出了硬件电路组成和调速方法。把该控制器运用到自行研制的四轮独立驱动电动汽车上进行测试，其结果表明，该控制器不仅具有响应速度快、调速性能好和稳定性高的特点，且开发成本低，具有广泛的应用价值。%Based on dsPIC and MC33035, a kind of controller is designed for brushless dc motor with good speed regulating and high reliability, which is used in electric car with four-wheel independent drive. The control plan and operating principle are outlined, and the corresponding hardware circuit structure and speed regulation method are introduced. The controller was applied to test self-de-veloped electric car with four-wheel independent drive. The results indicate that the controller have characteristics of fast response, good speed control performance and high stability with low cost and extensive application.
无刷直流电动机的正弦波电流驱动方法%Sine-wave Current Drive Method for Brushless DC Motors
Institute of Scientific and Technical Information of China (English)
朱信舜; 林明耀; 刘文勇
2011-01-01
分析了无刷直流电动机方波驱动方式和传统正弦波驱动方式的优缺点,利用三相Hall信号,得到正弦波电流的周期和幅值,通过软件算法生成六路SVPWM信号来驱动无刷直流电动机.采用数字信号控制器(DSC)dsPIC30F4011作为主控芯片,设计了无刷直流电动机的控制系统,详细分析了SVPWM波的生成方法,并给出了软件流程.实验结果验证了提出方法的正确性和可行性.%The performances of square-wave drive and sine-wave drive of brushless DC motor( BLDCM) were analyzed in this paper, a method to drive the BLDCM which makes use of three-phase Hall position signals to get the cycle and magnitude of the sine-wave and a proper software program to generate six-way SVPWM waves was presented. Adopting the DSC dsPIC30F4011, the control system of BLDCM was designed. The method to get SVPWM wave was analyzed in detail in the paper, and the software flow chart was also given. Experimental results verified the validity and feasibility of the proposed method.
Knowles, Timothy R.; Seaman, Christopher L.; Ellman, Brett M.
2004-01-01
Brush/fin thermal interfaces are being developed to increase heat-transfer efficiency and thereby enhance the thermal management of orbital replaceable units (ORUs) of electronic and other equipment aboard the International Space Station. Brush/fin thermal interfaces could also be used to increase heat-transfer efficiency in terrestrial electronic and power systems. In a typical application according to conventional practice, a replaceable heat-generating unit includes a mounting surface with black-anodized metal fins that mesh with the matching fins of a heat sink or radiator on which the unit is mounted. The fins do not contact each other, but transfer heat via radiation exchange. A brush/fin interface also includes intermeshing fins, the difference being that the gaps between the fins are filled with brushes made of carbon or other fibers. The fibers span the gap between intermeshed fins, allowing heat transfer by conduction through the fibers. The fibers are attached to the metal surfaces as velvet-like coats in the manner of the carbon fiber brush heat exchangers described in the preceding article. The fiber brushes provide both mechanical compliance and thermal contact, thereby ensuring low contact thermal resistance. A certain amount of force is required to intermesh the fins due to sliding friction of the brush s fiber tips against the fins. This force increases linearly with penetration distance, reaching 1 psi (6.9 kPa) for full 2-in. (5.1 cm) penetration for the conventional radiant fin interface. Removal forces can be greater due to fiber buckling upon reversing the sliding direction. This buckling force can be greatly reduced by biasing the fibers at an angle perpendicularly to the sliding direction. Means of containing potentially harmful carbon fiber debris, which is electrically conductive, have been developed. Small prototype brush/fin thermal interfaces have been tested and found to exhibit temperature drops about onesixth of that of conventional
Ionizable polyelectrolyte brushes: brush height and electrosteric interaction
Biesheuvel, P.M.
2004-01-01
Semi-analytical scaling theory is used to describe quenched and annealed (weakly charged, ionizable, charge-regulating) polyelectrolyte brushes in electrolyte solutions of arbitrary salt concentration. An Alexander-De Gennes box model with homogeneous distribution of polymer segments and the free en
永磁直流无刷力矩电机温度场分析%Analysis of the 3 D temperature field of permanent magnet brushless DC torque motor
Institute of Scientific and Technical Information of China (English)
史忠震
2015-01-01
In this paper the temperature field of permanent magnet brushless DC torque motor is calculated using finite ele-ment analysis software.According to the theory of heat transfer,the torque motor temperature field calculation model under the condition of continuous rotation blockage is built.The boundary conditions are obtained according to the internal heat ex-change of the torque motor,and then finite element simulating calculation is carried out of the model to examine the model simplification and heating of each part of the motor.The simulation results and the laws of the motor temperature are in sat-isfactory agreement.The analysis method has certain reference significance for the design optimization of brushless DC torque motor and analysis of its temperature field.%运用Ansys有限元分析软件对永磁直流无刷力矩电机进行了温度场分布研究，根据传热学理论建立了力矩电机连续堵转运行条件下的温度场计算模型，通过力矩电机内热交换给出了边界条件，对该模型进行有限元仿真计算，研究力矩电机模型简化以及电机各部件的发热情况，得出的仿真结果与电机实测数据基本相符，说明该分析方法对于直流无刷力矩电机的设计优化以及电机的温度场分析具有一定的参考意义。
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.
无刷直流电机无位置传感器控制系统仿真研究%The Simulation and Research of Sensorless Control System for Brushless DC motor
Institute of Scientific and Technical Information of China (English)
朱勇; 冯开平
2013-01-01
通过分析无刷直流电动机数学模型，利用Matlab/Simulink对无刷直流电机无位置传感器控制系统进行了建模和仿真。分别用Simulink库中自带的电机模型，反电动势过零点检测法、速度PI控制和电流滞环PWM控制方式对系统仿真，使系统更直观、简化，更加贴近实际控制系统，为无刷直流电机无位置传感控制系统的设计与调试提供了新的方法。仿真结果得到的三相行电流波形和反电动势波形与理论分析得到的波形一致，验证了该无位置传感器控制系统的正确性。%Through the analysis of the mathematical model of brushless dc motor, using Matlab/Simulink for brushless dc motor without position sensor control system modeling and simulation. Using Simulink library respectively with motor model,counter electromotive force zero method, speed PI control and current hysteresis PWM control mode of system simulation, and makes the system more intuitive, simplified, more close to the actual control system for brushless dc motor without position sensor control system design and debugging provides a new method. Simulation results obtained three phase line current waveform and back emf waveform and theoretical analysis of the wave get consistent,verify the sensorless control system accuracy.
Institute of Scientific and Technical Information of China (English)
戴文俊; 蒋慧
2015-01-01
To deal with the problem that the traditional PID control is difficult to achieve good control effect in the brushless DC motor control system, a kind of adaptive PID controller for fuzzy neural network is designed. It is based on the mathematical model of brushless DC motor, is the combination of using nonlinear control function of fuzzy control and learning ability and adaptive capacity of BP neural network in order to make on-line setting of the parameter of PID. The brushless DC motor double closed loop control system based on the fuzzy neural network adaptive PID controller is simulated. Simulation results show that the algorithm decreases the overshoot, has strong robustness in the load and the change of motor parameters.%针对传统PID控制在无刷直流电机控制系统中达不到良好的控制效果的问题，在无刷直流电机的数学模型基础之上，设计一种模糊神经网络自适应PID控制器，该控制器利用模糊控制非线性控制作用和BP神经网络的学习能力及适应能力相结合对PID参数进行在线实时调整。对基于模糊神经网络自适应PID控制器的无刷直流电机的双闭环控制系统进行仿真实验，实验结果表明，可以提高控制系统的响应速度，减小超调量，对负载及电机参数的变化都有较强的鲁棒性。
基于 Matlab 的直流电机控制系统硬件在环设计%HIL Design of DC Motor Control System Based on Matlab
Institute of Scientific and Technical Information of China (English)
朱虎; 林立; 刘正奇
2015-01-01
In order to save time for developer using C/C++language source code, as well as improve the effectiveness of DSP bipolar PWM DC motor control, studied automatic code generation based on Matlab/Simulink for TI C2000 DSP platform.The control model built in Matlab/Simulink converts to real-time con-trol code control DC motors through RTW ( Real_Time Workshop) conversion tools and realize the control of DC motor PWM bipolar control system on TMS320F2812 platform, the motor is running smoothly.Experi-mental results show that the Hardware-In-Loop ( HIL) simulation technology effectively shorten the product development cycle.%针对开发人员在利用C／C＋＋语言编写源代码时浪费大量时间的问题，同时为提高DSP对直流电机PWM双极性控制的有效性，研究了基于Matlab／Simulink平台下TI C2000DSP代码自动生成的方法。在Matlab／Simulink环境下搭建控制模型，通过RTW（ Real＿Time Workshop）工具转换成实时控制代码控制直流电机。并利用此方法在TMS320F2812开发板上实现了对直流电机PWM双极性控制系统的控制，电机平稳运行。实验验证了硬件在环半实物仿真技术有效地缩短产品的开发周期。
双闭环无刷直流电机驱动电路的设计与实现%Design of drive circuit for double closed-loop brushless DC motors
Institute of Scientific and Technical Information of China (English)
宋超; 王刚; 栾宁
2013-01-01
The structure and working principle of brushless DC motor are introduced in this paper based on summarization of development and application of brushless DC motor control system. The mathematical model is given. The PID control algo-rithm which is easy to use and robust in brushless DC motor control technology is analyzed emphatically. The hardware and soft-ware design of brushless DC motor control system is described in detail. The circuit was designed on the basis of the special drive chip DSPIC30F4011 used in motor drive circuit manufactured by Microchip. The principal circuit architecture includes power supply circuit, three-phase inverter bridge circuit, rotate speed closed-loop, current closed-loop, line voltage closed-loop, protetion circuit, etc. The software design of the system includes the initial program, and control programs.%在对无刷直流电动机控制系统的发展及应用综述的基础上,介绍了无刷直流电动机的结构和工作原理,给出了其数学模型,并重点分析了无刷直流电机控制技术中简单易用且鲁棒性较好的PID控制算法.对无刷直流电动机控制系统的硬件和软件设计做了详细论述.该电路是基于微芯公司的电机驱动电路专用驱动芯片DSPic30f4011而设计开发的,其中主体电路架构包括电源电路,三相逆变桥电路、转速闭环、电流闭环、线电压闭环和保护电路等.系统的软件设计中,主要包括微控制器的初始化程序、开环起动、换向控制、电流、速度采样时刻控制等.
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.
Brush Seals for Improved Steam Turbine Performance
Turnquist, Norman; Chupp, Ray; Baily, Fred; Burnett, Mark; Rivas, Flor; Bowsher, Aaron; Crudgington, Peter
2006-01-01
GE Energy has retrofitted brush seals into more than 19 operating steam turbines. Brush seals offer superior leakage control compared to labyrinth seals, owing to their compliant nature and ability to maintain very tight clearances to the rotating shaft. Seal designs have been established for steam turbines ranging in size from 12 MW to over 1200 MW, including fossil, nuclear, combined-cycle and industrial applications. Steam turbines present unique design challenges that must be addressed to ensure that the potential performance benefits of brush seals are realized. Brush seals can have important effects on the overall turbine system that must be taken into account to assure reliable operation. Subscale rig tests are instrumental to understanding seal behavior under simulated steam-turbine operating conditions, prior to installing brush seals in the field. This presentation discusses the technical challenges of designing brush seals for steam turbines; subscale testing; performance benefits of brush seals; overall system effects; and field applications.
Elimination of output voltage oscillations in DC-DC converter using PWM with PI controller
Directory of Open Access Journals (Sweden)
Sreenivasappa Veeranna Bhupasandra
2010-01-01
Full Text Available In this paper the SIMULINK model of a PWM controlled DC-DC converter is modeled using switching function concept to control the speed of the DC motor. The presence of the voltage oscillation cycles due to higher switching frequency in the DC-DC converter is identified. The effect of these oscillations on the output voltage of the converter, Armature current, Developed torque and Speed of the DC motor is analyzed. In order to minimize the oscillation cycles the PI controller is proposed in the PWM controller.
Design of Speed Measurement and Display System on Brushless DC Motor%无刷直流电机速度测量与显示系统设计
Institute of Scientific and Technical Information of China (English)
赵诣; 李杰; 刘喆; 刘俊; 陈伟
2012-01-01
针对在传统测量无刷电机转速过程中,磁传感器易受电机绕组和转子的磁场干扰和编码器与很多型号电机安装不匹配导致测速没有通用性等问题,提出了一种集精确测量电机转速、上位机实时显示转速及数据存储的综合设计方案.该方案采用角速率传感器测量转速,将数字信号处理器作为微控制器控制模数转换并将传感器的输出值存储并处理,提高了整个系统的处理速度.经过试验验证,该系统能实时地显示电机的转速,有很好的稳定性和可操作性,对无刷直流电机中的速度环控制与调试有很重要的实际意义.%Against the fact that when measuring the brushless DC motor rotary speed in the traditional process, the magnetic sensor was susceptible to interference by the magnetic field of motor windings and rotor, at the same time the encoder could not be installed with many models, so that it could not be universally used. This paper presented a set of integrated design for measuring motor rotary speed. It integrated accurate measurement of motor rotary speed, the PC real-time display and data storage. The design used angular rate sensor to measure speed. Conducting as micro-controller unit, the digital signal processor controlled analog to digital converter, the storing and processing of the sensor output value, as a result of that it could improve the processing speed of the whole system. After experimental verification, the system can display real-time speed of brushless DC motor with good stability and operability. It will play an important and practical role in the control and debug of brushless DC motor.
Institute of Scientific and Technical Information of China (English)
卢东斌; 欧阳明高; 谷靖; 李建秋
2012-01-01
四轮驱动轮毂电机电动汽车采用4个永磁无刷轮毂电机驱动，根据轮毂电机的反电势接近正弦波的特点，采用磁场定向控制方法可以实现最大转矩电流控制。该文在永磁同步电机磁场定向控制效率模型的基础上，提出了相同转速转矩下的多永磁同步电机系统效率模型，根据此模型证明了多永磁同步电机系统相同转速下转矩平均分配可使电机系统效率达到最优。将此结论应用到四轮驱动电动汽车轮毂电机转矩分配研究中，通过仿真和实车测试进行验证。仿真和试验结果证明，平均分配永磁无刷轮毂电机转矩可使整车效率最优。%Four in-wheel motors drive electric vehicles are driven by four brushless DC hub motors. Since the back electromotive force （emf） waveform of a permanent brushless DC hub motor is usually nearly sinusoidal, the maximum torque per ampere control can be found using field oriented control （FOC）. An efficiency model for a permanent magnet synchronous motor （PMSM） was used in an efficiency model of multi-PMSMs with the same speed and torque. The optimal efficiency can be achieved based on the average torque distribution assuming all the same speed PMSMs. This conclusion can be applied to the torque distribution of brushless DC hub motors for four-wheel drive electric vehicles. Simulation and experimental results show that the average torque allocation to the four hub motors of the electric vehicle gives the best efficiency.
Institute of Scientific and Technical Information of China (English)
寇宝泉; 张赫; 张海林; 杨国龙
2013-01-01
High precision planar motors have the features of simple system structure,planar direct drive,high resolution,fast response and have been widely noted in academic world and relevant areas for the past few years.However,the researches about systematic design method of planar motors are few in number.Integrated winding structure short-stroke DC planar motor (IWSDCPM) is analyzed in the paper.The structure,operation principle and features of the new type planar motor are introduced.The main dimensions' equation is derived and the main dimensions of the planar motor are confirmed.The design of coil and permanent magnet is discussed respectively,and the thrust optimization is carried on.According to its special structural style and applications,the universal design method of the planar motor is put forward.A prototype motor is manufactured according to the proposed design method,and some relational experiments are also achieved.The experiment results are agreed with the design objective.That verifies the validity of the design method.%高精密平面电机具有系统结构简单、平面直驱、高分辨率、高频响等特点,近年来受到学术界和相关领域的广泛关注.然而,到目前为止,针对高精密平面电机系统性设计方法的相关研究很少.该文对集成绕组结构短行程直流平面电机(integrated winding structure short-stroke DC planar motor,IWSDCPM)进行研究,介绍了IWSDCPM的结构形式、运行原理和特点.推导出IWSDCPM的主要尺寸的关系式,明确了电机的主要尺寸,对永磁体和线圈的设计分别进行了研究,并以推力最大为设计目标进行参数优化.针对其特殊的结构形式和应用场合,提出该类平面电机的通用设计方法.根据所提出的设计方法,加工制作了一台样机,并进行了相关实验测试.实验结果与设计指标基本吻合,验证了设计方法的有效性.
The Sensorless Control of Brushless DC Fan Motors Based on Current Feedback%基于电流反馈的直流无刷风扇电机无传感器控制
Institute of Scientific and Technical Information of China (English)
苏译; 徐晓昂
2012-01-01
针对无传感器直流无刷风扇电机开环控制的不稳定性和转速闭环控制的相位偏差,首先从直流无刷风扇电机的数学模型及反电势过零点检测方法出发,阐述了由外部PWM驱动的开环控制和转速闭环控制方法的不足,提出了一种新型的基于电流反馈的无传感器直流无刷风扇电机控制系统.最后借助MATLAB/Simulink软件进行了建模与仿真,验证了新型控制系统的可行性.仿真结果表明,提出的控制系统具有良好的稳定性并有效消除了相位偏差.%For instability of open-loop control and phase deviation of speed closed-loop control in sensorless brushless DC fan motors, this paper begins with the mathematical model and the detection method of zero crossing point of brushless DC fan motors, the defects existing in the open-loop control driven by external PWM signals and closed-loop speed control method are expounded, a novel control system of sensorless brushless DC fan motors based on the current feedback is proposed. Finally, the software of MATLAB is used for the modeling and simulation for the whole system, the feasibility of the proposed control system is verified. The simulation results show that the proposed control system has a good stability and eliminates the phase offset effectively.
Institute of Scientific and Technical Information of China (English)
袁川; 乐贵高
2014-01-01
针对无刷直流电机的转矩脉动，采用电流滞环控制来抑制脉动；在Matlab/Simulink环境下，基于直流无刷电机的数学模型、转速和电流双闭环控制策略来建立无刷直流电机电流滞环控制系统的各个独立模块如BLDC本体模块、速度控制模块、电流滞环模块、逆变电路模块、脉冲信号模块等，再进行各功能模块的连接，搭建无刷直流电机的控制系统仿真模型，并在给定参数下进行仿真分析。%The current hysteresis loop tracking control is used to prevent the brushless DC motor from torque rippling. In the Matlab/Simulink environment, the independent modules of the brushless DC motor system the with current hysteresis loop tracking control are built based on its mathematical model and the speed and current double closed loop control strategy, such as BLDC ontology, speed control, current hysteresis, inverter circuit and pulse signal modules, which are connected to each function module to build a brushless dc motor control system simulation model and set up the paramters to do the simulation analysis.
Institute of Scientific and Technical Information of China (English)
付光杰; 杨帛润; 高俊莹
2013-01-01
To consider the complex and coupled nonlinear characteristics of a brushless DC motor,and to overcome the low speed accuracy and slow response shortcoming of the traditional control algorithm,a new strategy for the coefficient of PID controller tuning of brushless DC motor control system simulation modeling based on improved particle swarm optimization (PSO) is proposed in this paper.Building a simulation model of BLDC control system in Matlab/Simulink,and to achieve the dual closed-loop control:The velocity loop adopts the PID control based on particle swarm optimization,the current loop uses hysteresis current control.Simulation results verify the control method of brushless DC motor speed control system has more rapidity,stability and robustness.%文章针对无刷直流电机(BLDC)复杂的、耦合的非线性的特点,克服传统的控制算法控制速度精度不高、响应速度慢等缺点,提出了一种基于改进的粒子群算法(PSO)对PID控制器系数自整定的无刷直流电机控制新策略.在Matlab/Simulink中搭建BLDC控制系统的仿真模型,并实现双闭环的控制:速度环采用改进粒子群算法优化PID控制,电流环采用滞环电流控制.仿真结果验证了该控制方法对无刷直流电机调速系统具有良好的快速性、稳定性和鲁棒性.
基于 LS052A Cb 的无刷直流电机的控制系统设计%Control System of Brushless DC Motor Based on LS052A Cb
Institute of Scientific and Technical Information of China (English)
韦宏利; 李金荣
2016-01-01
基于设计一款高效节能的无刷直流电机的控制系统方案的目的,LS052A Cb 是一款国产通用型单片机,能够实现多核多任务并行处理。在研究了 SVPWM 基本原理的基础上,采用空间矢量脉宽调制技术的方法,通过运用反电动势检测实现无位置传感器方式的位置检测,并检测速度和电流采集运用双闭环 PID 的控制策略实现了对无刷直流电机的速度控制的试验,得出一种新型无刷直流电机控制系统的方案可行,具有应用价值。%This paper seeks to design a control system for an efficient and energy saving brushless DC motor.LS052A Cb is a general purpose microcontroller in made in China that supports parallel multi core multi tasking processing.After studying the basic principles of SVPWM,with space vector pulse width modulation technology,and via counter EMF position detection is achieved under the sensor less mode.And speed detection and current collection using dual loop PID control strategy,speed control ex-periment of the brushless DC motor is carried out.The conclusion of feasibility of a new type of brushless DC motor control system of the program is obtained and proven of great value in application.
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)
肖金凤; 张垒; 盛义发
2013-01-01
针对目前存在的无刷直流电机转矩脉动这一突出问题,介绍了无刷直流电机转矩脉动及抑制机理,提出采用磁场定向控制策略,以降低无刷直流电机的转矩脉动.给出了控制策略及实现方法,并建立系统仿真模型,将基于磁场定向控制与传统方波线电压控制的控制系统进行对比仿真研究,仿真表明基于磁场定向控制的无刷直流电机控制系统性能更好,转矩脉动更小.以STM32F103B为核心设计了磁场定向控制无刷直流电机控制系统,实测的电机相电流为近似正弦波,转速波动小,电机运行平稳.%According to the torque ripple of brushless DC motor is the most outstanding problem, this paper introduces the torque ripple and reduction mechanism. The application of field orientation control ( FOC) strategy to reduce the torque ripple of brushless DC motor is put forward, the control strategy and implementation method are given, and the system simulation models are established. The system based on FOC is compared with system based on traditional square wave line voltage modulation method, the simulation results show the control performance of brushless DC motor based on FOC introduced is better, torque ripple is smaller. STM32F103B is used as the control core to design the Brushless DC motor control system test platform based on FOC. The phase current curve is approximate sine wave, speed ripple is small, operation is stable.
模糊-PID混合控制直流电机调速系统设计%Design of Speed Control System Based on Fuzzy-PID Hybrid Control for DC Motor
Institute of Scientific and Technical Information of China (English)
肖金凤; 盛义发; 徐祖华; 周到
2011-01-01
该文提出在转速、电流双闭环的直流电机调速系统转速环采用模糊-PID混合控制方法.当给定转速与实际转速的偏差大于某一阈值时,采用模糊控制;而当偏差减小到设定阈值以下时,采用PID调节.利用Matlab对该控制方法进行仿真,仿真表明混合控制系统的动、静态性能明显优于常规PID控制系统.将该控制方法应用于,DDSZ-1型电机及电气技术实验装置中的DJ23直流电机,以Atmega128为核心,以PWM为控制信号,设计了模糊-PID混合控制电机调速装置.试验结果验证了设计的混合控制调速系统鲁棒性好,实用性强,结构简单.%In this paper, a new hybrid speed regulating method based on Fuzzy-PID was proposed. It can be used in the speed loop for speed and current closed loop control DC motor control system. When the error between reference speed and real speed is bigger than some threshold value, uses the fuzzy control. But when the error reduces to the threshold value below, changes the PID adjustment. The simulation research on the hybrid speed regulating system of DC motor was carried out. The simulation results show that the system based on this hybrid speed regulating has better dynamic and static performance than the system based on PID speed regulating. A speed control system of DJ23 DC motor used in DDSZ-1 electrical machinery and electrical technology test installation was introduced. The system based on this new hybrid speed regulating method has a control unit of the single-chip Atmega128, using PWMcontrol signal to control DC motor. The results of experiment show that the system is of better robustness and strong practicality and simple structure.
永磁直线直流电机控制系统设计与实验研究%Design and Experiment for Linear Permanent Magnet Brushless DC Motor
Institute of Scientific and Technical Information of China (English)
尹曾锋
2012-01-01
本文详细介绍了基于DSP TMS320LF2407的永磁直线直流无刷电动机硬件设计和PWM控制方法,给出了电机的控制程序流程,试验结果表明该方法简单可行。%This paper introduces a DSP-based PWM timing method for linear permanent magnet brushless DC motor in detail. The test results show that the method of control program is simple and feasible in practice.
Nehl, T. W.
1980-12-01
A discrete state space model of a power conditioner fed permanent magnet brushless dc motor for aerospace and electric vehicle applications is developed. The parameters which describe that machine portion of this model are derived from a two dimensional nonlinear magnetic field analysis using the finite element method. The model predicts the instantaneous mechanical and electrical behavior of a prototype electromechanical actuator for possible use on board the shuttle orbiter. The model is also used to simulate the instantaneous performance of an advanced electric vehicle propulsion unit. The results of the computer simulations are compared with experimental test data and excellent agreement between the two is found in all cases.
Institute of Scientific and Technical Information of China (English)
马余洋
2015-01-01
A kind of high-efficiency DC brushless pumping motor together with its simple manufacturing pro-cess was introduced. The contents were included with the performance of 2-pole PM rotor, detailed stator construction and the manufacturing for the winding as well as relative control method.%介绍了一种效率高且制造工艺简单的无刷直流水泵电机。内容包括两极永磁体转子的性能、定子结构和绕组的制造及其控制方法。
Nanotribology of charged polymer brushes
Klein, Jacob
Polymers at surfaces, whose modern understanding may be traced back to early work by Sam Edwards1, have become a paradigm for modification of surface properties, both as steric stabilizers and as remarkable boundary lubricants2. Charged polymer brushes are of particular interest, with both technological implications and especially biological relevance where most macromolecules are charged. In the context of biolubrication, relevant in areas from dry eye syndrome to osteoarthritis, charged polymer surface phases and their complexes with other macromolecules may play a central role. The hydration lubrication paradigm, where tenaciously-held yet fluid hydration shells surrounding ions or zwitterions serve as highly-efficient friction-reducing elements, has been invoked to understand the excellent lubrication provided both by ionized3 and by zwitterionic4 brushes. In this talk we describe recent advances in our understanding of the nanotribology of such charged brush systems. We consider interactions between charged end-grafted polymers, and how one may disentangle the steric from the electrostatic surface forces5. We examine the limits of lubrication by ionized brushes, both synthetic and of biological origins, and how highly-hydrated zwitterionic chains may provide extremely effective boundary lubrication6. Finally we describe how the lubrication of articular cartilage in the major joints, a tribosystem presenting some of the greatest challenges and opportunities, may be understood in terms of a supramolecular synergy between charged surface-attached polymers and zwitterionic groups7. Work supported by European Research Council (HydrationLube), Israel Science Foundation (ISF), Petroleum Research Fund of the American Chemical Society, ISF-NSF China Joint Program.
Institute of Scientific and Technical Information of China (English)
曲剑波
2011-01-01
永磁无刷直流电机定子振动特性的研究对降低电机噪声和抑制电机的振动有重要意义.以某电动车用永磁直流无刷电机为研究对象,利用Ansys软件建立定子结构的参数化模型,并对影响振动特性的因素进行灵敏度分析.以此为依据对定子进行优化设计,为该类电机的振动特性优化提供依据.%It is important to study the vibration characteristics of the stator for permanent magnet brushless DC motor,aiming to reduce motor noise and vibration suppression.The parameters of the model stator structure were established with ANSYS software on basis
关于直流力矩电机电枢灌封后胶层开裂问题的探析%Study on Crack of DC Torque Motor's Armature After Sealed with Epoxy Resin
Institute of Scientific and Technical Information of China (English)
罗润娟; 周钦沅; 董文生
2012-01-01
直流力矩电机电枢用环氧树脂灌封后胶层开裂的问题是直流力矩电机在生产制造过程中较为常见的一种问题.本文从灌封料配方及其它因素去分析,解决该类电机电枢灌封开裂.%In the producing of DC torque motor's armature,it's a usual problem about the glue layer cracking after sealed with epoxy resin. This problem was analyzed from sealing compounds to other factors in this paper,so as to solve the crack of this kind of motor's armature.
Hamilton, H. B.; Strangas, E.
1980-01-01
The time dependent solution of the magnetic field is introduced as a method for accounting for the variation, in time, of the machine parameters in predicting and analyzing the performance of the electrical machines. The method of time dependent finite element was used in combination with an also time dependent construction of a grid for the air gap region. The Maxwell stress tensor was used to calculate the airgap torque from the magnetic vector potential distribution. Incremental inductances were defined and calculated as functions of time, depending on eddy currents and saturation. The currents in all the machine circuits were calculated in the time domain based on these inductances, which were continuously updated. The method was applied to a chopper controlled DC series motor used for electric vehicle drive, and to a salient pole sychronous motor with damper bars. Simulation results were compared to experimentally obtained ones.
The Level of Technology of Permanent Brushless DC Motor and It's Useness Prospect%永磁无刷电动机技术发展水平及应用前景
Institute of Scientific and Technical Information of China (English)
李烨; 严欣平
2001-01-01
永磁无刷电动机作为一种新型电动机，源于其自身的技术优势和卓越性能，必将伴随着新世纪的脚步，在相关支撑技术快速发展的推动下，获得更为广阔的应用和发展空间。%As a new style motor, due to it's technology superiority and brilliant function, at the same time, with relative sustain technologies quickly developing. Permanent magnet brushless DC motor is bound to gain wider space of usenenss and development in coming new centry.
Institute of Scientific and Technical Information of China (English)
王宗培; 陈敏祥
2012-01-01
The new DC motor (New DCM) shares the same armature winding with traditional DC motor (DCM) , all adopt seal connection (namely polygon connection) to combine K commutating units, the armature winding of New DCM is similar but are different with multi-phase AC motor's armature winding which employ typical polygon connection. New DCM is neither multi-phase AC motor nor multi-phase BLDCM. Multi-phase AC armature winding adopted typical polygon connection can have circular current in closed circuit. However, New DCM or DCM with seal connection armature winding will not and can not have circular current in closed circuit.%新直流电动机(New DCM)与传统有刷直流电动机(DCM)有相同的电枢绕组,都是分成K个换向单元成封闭形(多边形)接法,与多相交流电动机采取封闭形(多边形)接法的电枢绕组有类似之处但有区别,New DCM不是一台多相交流电动机,也不是一台多相无刷直流电动机.与典型多边形接法的多相交流电枢绕组闭合回路可能有环流的情况不同,New DCM或DCM为封闭形接法的电枢绕组,闭合回路内不存在环流,不可能产生环流.
Institute of Scientific and Technical Information of China (English)
王芳; 陈小军
2012-01-01
基于Maxwell二维瞬态磁场分析理论,依据给定的技术指标,运用RMxprt快速确定电机电磁及结构设计方案,并导入Maxwell中建立二维有限元仿真模型,基于场路耦合有限元法对电机的机械特性和效率进行了仿真分析,仿真结果精确地反映了高速永磁无刷直流电机的启动过程,为电机的优化设计、减少转矩脉动、提高启动转矩提供了理论依据.%According to 2D transient magnetic field analysis the theories of the Maxwell and given technical indicators, the electromagnetis and structural scheme of motor were established by RMxprt. And then the Maxwell was importted to create two-dimensional finite element simulation model. The motor' s mechanical characteristics and efficiency were simulated by the magnetic circuit calculation. The simulation results accurately reflect the high speed permanent magnet brushless DC motor starting process, and provided a theoretical basis for the motor optimal design, reduction of torque ripple, improve start torque.
Resisting protein adsorption on biodegradable polyester brushes.
Hu, Xinfang; Gorman, Christopher B
2014-08-01
The protein adsorption and degradation behaviors of poly(lactic acid), poly(glycolic acid) (PGA) and poly(ε-caprolactone) (PCL) brushes and their co-polymer brushes with oligo(ethylene glycol) (OEG) were studied. Both brush structure and relative amount of OEG and polyester were found to be important to the protein resistance of the brushes. A protein-resisting surface can be fabricated either by using OEG as the top layer of a copolymer brush or by increasing the amount of OEG relative to polyester when using a hydroxyl terminated OEG (OEG-OH) and a methoxy terminated OEG (OEG-OMe) mixture as the substrate layer. The degradation of single polyester brushes and their co-polymer brushes using OEG-OH as a substrate layer or using OEG as a top layer was hindered. This phenomenon was rationalized by the inhibition of the proposed back-biting process as the hydroxy end groups of polyester were blocked by OEG molecules. Among these brushes tested, PGA co-polymer brushes using the methoxy/hydroxyl OEG mixture as the substrate layer proved to be both protein-resistant and degradable due to the relatively large amount of OEG moieties and the good biodegradability of PGA.
基于DSP2812的无刷直流电动机控制及其MATLAB仿真%Brushless DC Motor Control based on DSP2812 and MATLAB Simulation
Institute of Scientific and Technical Information of China (English)
周立媛; 韩文波; 薛书飞
2013-01-01
采用DSP2812为控制器对无刷直流电动机的控制系统进行了硬件电路和软件程序设计.文中采用了PI转速和PI电流调节器的双闭环控制方法,实现了转速的精确控制,并建立了无刷直流电动机控制系统的数学模型.最后运用MAT-LAB/SIMULINK进行了仿真,仿真结果验证了系统的可行性.%In this paper,it adopt DSP2812 as controller for brushless direct current (DC) motor and carry through the hardware and software programming for control system.It use the dual closed-loop control of PI revolving speed and PI current regulator to achieve a precise control of revolving speed,and establish the mathematical model of the brushless DC motor control system.Finally,the results of the MATLAB / SIMULINK simulation verify the feasibility of the system.
无刷直流电动机系统的一种摩擦补偿方法研究%Compensation of friction in brushless DC motor system
Institute of Scientific and Technical Information of China (English)
李书训; 姚郁
2001-01-01
Presents a simple method of compensating friction against the character of the nonlinear model of a brushless DC motor system which transfers the original system model to a simple linear model using the method of input-output linearization, and estimates the coulomb friction in the system in real-time using a nonlinear friction estimator, and then compensate the friction in the system using a friction feedforward, and concludes from simulation results that this method can effectively eliminate the influence of friction in brushless DC motor systems.%针对无刷直流电动机系统的非线性数学模型特点，提出了一种简单的摩擦补偿方法.该方法首先利用输入输出线性化方法将原系统模型转化为一种简单的线性模型，然后给出一种非线性摩擦估计器实时估计系统中的库仑摩擦值，最后利用摩擦前馈补偿方法对其进行补偿.仿真结果表明该方法可以有效地抑制无刷直流电动机系统中的摩擦影响.
Institute of Scientific and Technical Information of China (English)
李尉; 宋保维; 胡欲立
2012-01-01
Underwater vehicles are widely used in ocean. Electrical power underwater vehicles, which have the advantage of simple structure, convenient maintenance, et al. are used more widely than thermal power underwater vehicles. By using the finite element analysis software Magnet, inner and outer magnetic fluxes of a permanent magnet DC motor for the propulsion of a certain electrical power underwater vehicle is numerically simulated with and without load. The acquired results can apply to analyzing interference of the leakage magnetic flux of a permanent magnet DC motor for the propulsion of underwater vehicles to their nearby electronic instruments and equipments.%水下航行器在海洋中已得到广泛应用,而电动力水下航行器较热动力水下航行器由于具有结构简单、维护方便等优点应用更广泛.应用有限元分析软件Magnet,对某型电动力水下航行器推进用永磁直流电机有无负载时内、外磁场进行了数值模拟,所获得的结果可用于分析电机漏磁场对其周围电子仪器设备的干扰.
Institute of Scientific and Technical Information of China (English)
汪楚锟; 谢利理
2013-01-01
Due to high efficiency, long life, low noise and good speed-torque characteristics of brushless DC motor, BLDCM is more extensive in auto application. A design, and simulation control strategy, system simulation analysis of the system for Brushless DC motor used in electric vehicle control system characteristics mainly are made for pre-estimation of the overall adjustment program to analyze the feasibility of control strategy. Simulation results show that the realization of functions is possible, and reaches the desired effect.%由于无刷直流电机其具有高效率、长寿命、低噪声以及较好的转速-转矩特性,在汽车中的应用比较广泛.针对电动汽车用无刷直流电机控制系统特性进行了方案设计,然后仿真验证控制策略,系统仿真分析主要是对系统的整体调节方案的预估计,分析控制策略的可行性.Matlab仿真结果显示所实现功能可行,基本达到了预期效果.
Institute of Scientific and Technical Information of China (English)
秦虎; 王孝利; 程远; 罗新华
2012-01-01
Based on the theoretical analysis and experimental verification on shaft breakdowns of the high-speed brash-less DC motor,a new test method was proposed to improve the present ones. The method was applied to the testing process of high-speed brushless DC motor. The experimental results demonstrate that this method is correct and effective.%针对高转速无刷直流电动机寿命试验中出现的转轴卡死故障进行理论分析和试验验证,找出现行的试验方法的不足,结合高转速无刷直流电机的运动特性,提出了一种新的试验方法并将其应用于实际试验过程中,通过试验验证了方法的正确和有效.
Institute of Scientific and Technical Information of China (English)
2013-01-01
This article provides a brushless DC motor controller based on TMS320F2812 chip sensor design speed, current dual closed-loop digital control platform sensorless brushless DC motor running smoothly. Introduces the system's hardware and software structure. It has becu proved reliable operation of the controller. The system has broad application prospects.% 提供了一种基于TMS320F2812芯片的无传感器无刷直流电机控制器，设计了转速、电流双闭环数字化控制平台，实现了无传感器的无刷直流电机的平稳运行。同时详细地介绍了该系统的硬件、软件构成。试验证明，该控制器运行稳定可靠。该系统具有广泛的应用前景。
Institute of Scientific and Technical Information of China (English)
吴强; 韩震宇; 李程
2013-01-01
In order to improve the control precision of brushless DC motor,using TI TMS320LF2407A as the control chip, a digital incremental PID algorithm and PWM control technology. This paper describes the principle of PID algorithm, PWM speed control principle and system hardware block diagram, software flow chart and draw the conclusion that PID algorithm has great superiority in the brushless DC motor speed control .% 为了提高无刷直流电机转速控制精度，系统选用了 TI 公司 TMS320LF2407A 为控制芯片，采用数字式增量 PID 算法和PWM控制技术。叙述了PID算法原理、PWM调速控制原理以及系统硬件原理框图、软件流程框图，并得出实验结论，证明PID算法在无刷直流电机调速过程中的优越性。
Design of Three-phase Brushless DC Motor Driver Circuit Based on DSP%三相无刷直流电机调速系统的驱动设计
Institute of Scientific and Technical Information of China (English)
2013-01-01
By using IR2136 (International Rectifier) to design a three-phase brushless DC motor driver circuit based on TMS320F28335 floating-point processor and implementing positive-negative rotating and speed con⁃trolling, this paper designs a driving circuit of the three-phase brushless DC motor, including power module, sig⁃nal isolation module, IR2136 logic circuit, driving circuit of the three-phase full bridge and over current protec⁃tion circuit, etc.% 以TMS320F28335浮点型处理器为控制器，采用International Rectifier公司的IR2136作为驱动芯片，设计了三相无刷直流电机的驱动电路，实现三相无刷直流电机调速及正反转控制，其中包括电源模块、信号隔离模块、IR2136逻辑电路、三相全桥驱动电路及过流保护电路等。
大功率高速比直流电机设计简介%Brief of Design of the Large-size DC Motor with High Speed-regulation Ratio
Institute of Scientific and Technical Information of China (English)
陶宝英
2014-01-01
The single stack of different-slot armature winding with equalizing line and block brush was applied in the design of 2 000 kW motor with high speed-regulation ratio, to improve the commutation performance;the down-ward-pressure weftless tape was employed in the end wind-ing structure, to ift with the high-speed operation;the radial ventilation was furnished in the armature shaft and inclined air guide plate was welded between the shafts to enhance the cooling and ventilating effectiveness of the armature.%在2000 kW高速比直流电机电磁设计中，采用带均压线的单叠异槽式电枢绕组和分块电刷等，来提高电机的换向性能；绕组端部采用下压式无纬带结构，以满足电机的高速运行；电枢铁心采用径向通风，在转轴筋之间焊接倾斜导风板，以提高电枢通风冷却效果。
A Novel Motor-Speed-Regulation Method
Directory of Open Access Journals (Sweden)
Huang Zhou
2016-01-01
Full Text Available The traditional doubly-fed motor has less reliability because it needs carbon brushes and sliding rings which are not highly reliable. The brushless doubly-fed machine costs a lot for its framework requires special designing and processing. To overcome the disadvantages of the two kinds of motors, this paper focuses on a novel method of motor speed regulation which is based on rotating feeding. The motor speed changing around its rated speed can be realized based on the method without any carbon brush or sliding ring on the prosaic electrical motors. On the basis of the full controlled thyristor rectifying bridge structure, the basic idea is introduced; the advantages and disadvantages of this method are analyzed. This kind of systems can replace the brushed or brushless double-fed systems. They are very suitable for driving fans or pumps, or power-generating systems with variable speed constant frequency such as wind power or water power generating systems.
基于 Matlab 的无刷直流电机控制系统仿真研究%Simulation Study on Control System of Brushless DC Motor based on Matlab
Institute of Scientific and Technical Information of China (English)
谢少华; 瞿遂春
2015-01-01
This paper analyzes the operation principle of Brushless DC motor, this paper proposes a new method based on Matlab modeling, namely through the synchronous motor model of the original Matlab, change the inverse electromotive forceparameters, then the external set position detection and commutation circuit, which can be convenient for brushless DC motor control system the simulation model. This paper introduce the sub-modules of the controlling system in detail., at the same time, the simulation results are compared with the experimental results. Results show that, the simulation results are consistent with the experimental results, a new method of modeling in Matlab can correctly reflect the performance of Brushless DC motor control system and provides an important basis for the design and debugging of the actucal control system.%本文在分析无刷直流电机运行原理的基础上，提出了一种基于 Matlab 建模的新方法，即通过Matlab 中原有的同步电机模型，改变其反相电动势参数，然后在外部搭建位置检测与换相电路，可以方便快捷的构成无刷直流电机控制系统仿真模型。并对控制系统仿真模型各个部分的建模进行介绍，同时，将仿真结果与实验结果进行对比。对比结果表明，仿真结果与实验结果基本一致，在 Matlab 中建模的新方法能够正确反映无刷直流电机控制系统性能，对实际控制系统设计与调试提供重要依据。
Design of a Control System for the Running-in Test Bench of AC-DC Wheel Set Motor%交直流轮对电机跑合试验台控制系统设计
Institute of Scientific and Technical Information of China (English)
张春红
2014-01-01
After assembly of the wheel set motor,it is required to make running-in test on the wheel set in order to check whether the gear box, motor bearings and wheel set bearings conform to the installation requirement.Three control systems are designed,namely data collection,AC-DC drive and intelligence test and control.In the design of the data collecting system,sensors are used to collect signals about ,temperature and rotation speed during motor running-in.The AC-DC drive is designed to meet the requirement of the drive of the AC-DC haulage motor.The intelligent control design adopts ADVANTECH industrial computer as control terminal,and MCGS configuration software and communication equipment 485 are used to perform the function of automatic collection of experimental data.The test device,with manual and automatic functions has high control precision and other advantages.%轮对电机组装完成之后，为了检查齿轮箱、电机轴承、轮对轴承等是否符合安装要求，需要对轮对进行跑合试验。从数据采集、交直流传动和智能测控这三个控制系统进行设计。数据采集系统设计采用传感器采集电机跑合过程中的振动、温度、转速等信号。交直流传动设计是为了满足交直流机车电机传动的需求。智能测控设计采用研华工控机作为控制终端，用MC GS组态软件和485通讯实现试验过程数据自动采集等功能。试验装置具备手动和自动两种功能，具有控制精度高等优点。
Hardware Design of Brushless DC Motor Based on IPM and DSP Control%基于IPM与DSP控制无刷直流电机的硬件设计
Institute of Scientific and Technical Information of China (English)
邱兴阳
2013-01-01
智能功率模块IPM集驱动电路、欠压、短路、过热等保护电路于一体，结构简单、损耗小、重量轻、体积小、使用可靠等优点。随着大功率IPM集成器件、高性能单片机及数字信号处理器DSP技术的飞速发展，使得大功率驱动控制和高速复杂的控制算法得到了满足，从而也使得大功率无刷直流电机在电机界的电动推进系统中得到了越来越广泛的重视。无刷直流电机具有高速性能好，体积小、效率高、寿命长、运行可靠、维护简便等优点，能广泛应用于医疗、化工、煤炭、石油、纺织、仪器仪表、家用电器、电动汽车和自行车、铁路运输、航空航天、工业自动化等领域。使用IPM和DSP控制无刷直流电机，不仅能实现对电机的实时性控制，还能使控制电路得到简化。因此研究IPM与DSP控制无刷直流电机的硬件设计具有非常重要的意义。%IPM integrates the protection circuits of driving circuit, undervoltage, short circuit, overheating and so on, which has the advantages of simple structure, small loss, light weight, small size, reliable use, etc. With the rapid development of high-power IPM integrated devices, high-performance single-chip and digital signal processor technology, high-power driving control and high-speed complex control algorithms have been met, making high-power brushless DC motor get widely attention in the electric motor propulsion system. The brushless DC motor has advantages of good high-speed performance, small size, high efficiency, long life, reliable opera-tion and easy maintenance, etc. , which can be widely used in the fields of medical, chemical, coal, petroleum, textile, instruments, household appliances, electric vehicles and bicycles, railway transportation, aerospace, industrial automation and so on. The brushless DC motor controlled by IPM and DSP not only achieves the real-time control of motors, but also simplifies
Institute of Scientific and Technical Information of China (English)
吴轩钦; 谭国俊; 叶宗彬; 景巍
2011-01-01
The magnetic circuit in the motor is saturated easily when the load current increases and thus the motor flux can not be accurately identified by traditional linear current model.Therefore,salient pole synchronous motor flux observer model must consider the saturation effect.Because of rotor structural asymmetry in saliency synchronous motors,d axis saturation curve,which obtained by experiment,can not be fully expressed saturation effect of the motor.In this paper,using the q axis conversion ideas,the salient pole motor is converted into a non-salient pole motor.Furthermore,static saturation inductance,dynamic saturation inductance and cross saturation inductance are introduced to represent saturation characteristics.On this basis,a hybrid air gap flux estimator,which considering the magnetic saturation effected,and its vector control strategy are proposed.Both the simulation and experimental results demonstrate that the proposed dc excited salient pole synchronous motor vector control system has excellent control property,and it has pretty high value in theories and applications.%随着负载电流的增大,电机的磁路会进入饱和状态,传统的线性电流模型无法准确辨识电机磁链,因此凸极同步电机磁链观测模型中必须考虑饱和效应的影响。针对凸极同步电机转子结构不对称,通过实验得到的d轴饱和曲线无法完整表述电机的饱和效应,本文采用了一种q轴折算思想,将凸极同步电机转化为隐极同步电机,同时引入稳态饱和电感、动态饱和电感及交叉饱和电感。并在此基础上提出了考虑磁场饱和效应的凸极同步电机混合气隙磁链观测模型及其矢量控制策略。仿真和实验结果表明所提直流励磁凸极同步电机矢量控制解决方案具有优良的控制性能,以及很高的理论与应用价值。
Institute of Scientific and Technical Information of China (English)
段晓妮; 孙纯祥
2012-01-01
A high-accuracy constant-speed system of great angular momentum permanent magnet brushless DC gyro motor was introduced. Based on the analysis of the operational principle of the brushless DC gyro motor, a speed closed -loop control strategy was designed, and the model of the BLDCM and controller was proposed in Simulink. DSP and CPLD were used as the main components of the controller. Piecewise PI was used as the control algorithm on steady speed. The motor was controlled by the combination of hardware and software to achieve soft start, protection of over current and steady speed controlling. Through prototype testing, the result shows that such control strategy has short starting time, high starting reliability and high-accuracy steady speed.%介绍了一种大角动量永磁无刷直流陀螺电动机的高精度稳速控制系统.在研究无刷直流陀螺电动机运行原理的基础上,应用了一种简单实用的速度闭环控制策略,并在Simulink中建立电机本体及控制模型.陀螺电动机的主控制器由硬件电路和软件程序组成.DSP和CPLD作为控制器主体,以分段PI算法为稳速控制方法,两者配合实现了软起动、过流保护和稳速控制等功能.样机试验结果表明,该控制系统起动迅速、起动可靠性高及稳速精度高.
Institute of Scientific and Technical Information of China (English)
张明慧; 刘卫国; 陆地; 孙伟
2011-01-01
建立了基于Bertotti铁耗分离理论,全面考虑交变磁化条件和旋转磁化条件下的永磁无刷直流电动机的铁耗计算模型.通过结合时步有限元方法,精确计算出了一台30 kW、4极3相表贴式永磁无刷直流电动机在额定转速为8 000 r/min时的定子铁心损耗.相较于传统的铁耗计算经验公式,本模型提高了永磁无刷直流电动机铁耗计算的精度和准确度,对电机的优化设计具有指导意义,有较好的工程应用价值.%The model of iron losses calculation in PM brushless DC motor was built based on Bertotti's iron-loss model and considering both alternating and rotating behavior of the magnetic field. The stator core losses are calculated by time-step FEM method for a 30 kW,4-pole, 3-phase, surface mounted PM brushless DC motor when its rotating speed is 8 000 r/min. Compared with the conventional experience equation, the model is more accurature and precise. And it is valuable for the motor optimization design and engineering application.
Institute of Scientific and Technical Information of China (English)
魏巍
2014-01-01
本文针对无刷直流电机设计了一种可在线学习的单神经元自适应PID智能控制器，通过有监督的Hebb学习规则来调整权值，每一次采样都直接根据反馈误差对神经元权值进行调整，实现PID三个参数的自适应，采用分段线性化方法建立无刷直流电机反电动势梯形波，采用滞环电流控制器实现电流调节，并在Matlab/Simulink仿真平台上搭建仿真模型，结果表明智能PID控制效果和鲁棒性都优于常规PID，大大提高了系统的跟随性，能满足无刷电机系统对实时性的要求。%According to brushless DC motor, this paper designed a kind of single neuron self-adaptive PID intelligent controller which can be learned online, the weights can be adjusted by supervised Hebb learning rule, the neuron weights are adjusted according feedback error in every sampling, so as to realize the self-adaptation of three PID parameters. Brushless DC motor back EMF wave was built by using piecewise linearization method, the current regulation was realized by using hysteresis current controller and simulation model was structured based on Matlab / Simulink simulation platform. The results show that the intelligent PID control effect and robustness are better than the conventional PID, so it greatly improved the following characteristic of the system, and it can satisfy the real-time requirements of the brushless motor system.
Institute of Scientific and Technical Information of China (English)
祝加雄; 常峰
2013-01-01
Through analyzing present situation the utilization of solar energy and efficiency of pumping systems both are low.This paper designed a brushless DC motor pumps control system based on the AVR microcontroller.This control system is mainly composed of photoelectric tracking module,brushless DC motor controller,circuit protection module.It adopted the energy tracking and controlling,protection the motor by multi-point detection.Then automatic balance between the flow and energy was carried out in different heads.After experimental verification,the system had greatly improved the utilization of solar energy and efficiency of pumping systems.So the system had a certain value in use.%为了解决太阳能利用率低和水泵系统效率低等问题,设计了一种基于AVR单片机的直流无刷电机水泵控制系统,主要由光电跟踪模块、无刷直流电机控制器、电路保护模块等组成.系统采用能量跟踪控制,多点检测保护电机,实现在不同扬程下,流量与能量之间自动平衡.结果表明:该系统改善了太阳能利用率和水泵系统效率,且运行稳定,具有一定的使用价值.
Design of Permanent Magnet Brushless DC Motor Control System for Air Conditioning%空调用永磁无刷直流电动机控制器设计
Institute of Scientific and Technical Information of China (English)
田德文; 徐奇伟; 吴世华
2011-01-01
永磁无刷直流电动机是新一代高性能的驱动电机,它高效、节能、控制简单,已在变频空调中得到很好的应用.传统无刷直流电动机控制器结构及控制策略复杂、成本高、节能效果不明显.文中提出了一种采用dsPIC30F2010作为控制芯片、FSBS1 0CH60SPM智能功率模块的无刷直流电机控制器设计方案.该控制器具有体积小、成本低的优点,可以广泛的应用于直流变频节能空调中.%The permanent magnet brushlese DC motor has been a very good application in variable frequency air conditioning as an advanced drive motor, with the features of high efficiency, low cost and simple operation. The traditional control strategy and structure of brushless DC motor control system are complicated, costly and power -wasting. In this paper, an control system with the control core of dsPIC30F2020 and intelligent power module FSBS10CH60SPM was designed. This design has smaller volume and lower cost, and can be widely used in variable frequency air conditioning.