Dual wound dc brush motor gearhead
Henson, Barrie W.
1986-01-01
The design requirements, the design, development tests and problems, the qualification and life test and the findings of the strip examination of a dual wound DC brushed motor gearhead are described. It is the only space qualified dual wound dc brushed motor gearhead in Europe.
Development of the Upgraded DC Brush Gear Motor for Spacebus Platforms
Berning, Robert H.; Viout, Olivier
2010-01-01
The obsolescence of materials and processes used in the manufacture of traditional DC brush gear motors has necessitated the development of an upgraded DC brush gear motor (UBGM). The current traditional DC brush gear motor (BGM) design was evaluated using Six-Sigma process to identify potential design and production process improvements. The development effort resulted in a qualified UBGM design which improved manufacturability and reduced production costs. Using Six-Sigma processes and incorporating lessons learned during the development process also improved motor performance for UBGM making it a more viable option for future use as a deployment mechanism in space flight applications.
Implementation of Brushed DC Motor Control in LabVIEW FPGA
K. Lamár; A. G. Kocsis
2013-01-01
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 con...
"Long life" DC brush motor for use on the Mars surveyor program
Braun, David; Noon, Don
1998-01-01
DC brush motors have several qualities which make them very attractive for space flight applications. Their mechanical commutation is simple and lightweight, requiring no external sensing and control in order to function properly. They are extremely efficient in converting electrical energy into mechanical energy. Efficiencies over 80% are not uncommon, resulting in high power throughput to weight ratios. However, the inherent unreliability and short life of sliding electrical contacts, especially in vacuum, have driven previous programs to utilize complex brushless DC or the less efficient stepper motors. The Mars Surveyor Program (MSP'98) and the Shuttle Radar Topography Mission (SRTM) have developed a reliable "long life" brush type DC motor for operation in low temperature, low pressure CO2 and N2, utilizing silver-graphite brushes. The original intent was to utilize this same motor for SRTM's space operation, but the results thus far have been unsatisfactory in vacuum. This paper describes the design, test, and results of this development.
Development and Implementation of Brush less DC Motor Controllers Based on Intelligent Control
Energy Technology Data Exchange (ETDEWEB)
Park, Jin Hyun [Pusan Junior College, Pusan (Korea, Republic of); Choi, Young Kiu [Pusan National University, Pusan (Korea, Republic of)
1997-06-01
This paper proposes an intelligent controller for brush less DC motor and load with unknown nonlinear dynamics. The proposed intelligent control system consists of a plant identifier and PID controller with varying gains. The identifier is constructed using an Auto Regressive Moving Average(ARMA) model. In order to tune the parameters of the identifier and the gains of the PID controller efficiently, we also propose a modified Evolution Strategy. Experimental results show that the proposed intelligent controller for brush less DC motor has good control performance under unknown disturbance. (author). 13 refs., 7 figs., 1 tab.
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.
Brushed permanent magnet DC MLC motor operation in an external magnetic field
Energy Technology Data Exchange (ETDEWEB)
Yun, J.; St Aubin, J.; Rathee, S.; Fallone, B. G. [Department of Physics, University of Alberta, 11322-89 Avenue, Edmonton, Alberta T6G 2G7 (Canada) and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada); Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada) and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada); Department of Physics, University of Alberta, 11322-89 Avenue, Edmonton, Alberta T6G 2G7 (Canada); Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada) and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada)
2010-05-15
Purpose: Linac-MR systems for real-time image-guided radiotherapy will utilize the multileaf collimators (MLCs) to perform conformal radiotherapy and tumor tracking. The MLCs would be exposed to the external fringe magnetic fields of the linac-MR hybrid systems. Therefore, an experimental investigation of the effect of an external magnetic field on the brushed permanent magnet DC motors used in some MLC systems was performed. Methods: The changes in motor speed and current were measured for varying external magnetic field strengths up to 2000 G generated by an EEV electromagnet. These changes in motor characteristics were measured for three orientations of the motor in the external magnetic field, mimicking changes in motor orientations due to installation and/or collimator rotations. In addition, the functionality of the associated magnetic motor encoder was tested. The tested motors are used with the Varian 120 leaf Millennium MLC (Maxon Motor half leaf and full leaf motors) and the Varian 52 leaf MKII MLC (MicroMo Electronics leaf motor) including a carriage motor (MicroMo Electronics). Results: In most cases, the magnetic encoder of the motors failed prior to any damage to the gearbox or the permanent magnet motor itself. This sets an upper limit of the external magnetic field strength on the motor function. The measured limits of the external magnetic fields were found to vary by the motor type. The leaf motor used with a Varian 52 leaf MKII MLC system tolerated up to 450{+-}10 G. The carriage motor tolerated up to 2000{+-}10 G field. The motors used with the Varian 120 leaf Millennium MLC system were found to tolerate a maximum of 600{+-}10 G. Conclusions: The current Varian MLC system motors can be used for real-time image-guided radiotherapy coupled to a linac-MR system, provided the fringe magnetic fields at their locations are below the determined tolerance levels. With the fringe magnetic fields of linac-MR systems expected to be larger than the
Brushed permanent magnet DC MLC motor operation in an external magnetic field
International Nuclear Information System (INIS)
Purpose: Linac-MR systems for real-time image-guided radiotherapy will utilize the multileaf collimators (MLCs) to perform conformal radiotherapy and tumor tracking. The MLCs would be exposed to the external fringe magnetic fields of the linac-MR hybrid systems. Therefore, an experimental investigation of the effect of an external magnetic field on the brushed permanent magnet DC motors used in some MLC systems was performed. Methods: The changes in motor speed and current were measured for varying external magnetic field strengths up to 2000 G generated by an EEV electromagnet. These changes in motor characteristics were measured for three orientations of the motor in the external magnetic field, mimicking changes in motor orientations due to installation and/or collimator rotations. In addition, the functionality of the associated magnetic motor encoder was tested. The tested motors are used with the Varian 120 leaf Millennium MLC (Maxon Motor half leaf and full leaf motors) and the Varian 52 leaf MKII MLC (MicroMo Electronics leaf motor) including a carriage motor (MicroMo Electronics). Results: In most cases, the magnetic encoder of the motors failed prior to any damage to the gearbox or the permanent magnet motor itself. This sets an upper limit of the external magnetic field strength on the motor function. The measured limits of the external magnetic fields were found to vary by the motor type. The leaf motor used with a Varian 52 leaf MKII MLC system tolerated up to 450±10 G. The carriage motor tolerated up to 2000±10 G field. The motors used with the Varian 120 leaf Millennium MLC system were found to tolerate a maximum of 600±10 G. Conclusions: The current Varian MLC system motors can be used for real-time image-guided radiotherapy coupled to a linac-MR system, provided the fringe magnetic fields at their locations are below the determined tolerance levels. With the fringe magnetic fields of linac-MR systems expected to be larger than the tolerance
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.
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...
High speed DC brushless motor controlled by microntroller
International Nuclear Information System (INIS)
The paper presents an example of DC Brushless motor used to rotate high vacuum turbo molecular pumps. Both the motor and the electronic drive system, controlled by microcontroller PIC16F877, are designed and made in our institute. DC Brushless motors are one of the motor types which have had the fastest development. This type of motor is especially used in industries such as Industrial Automation Equipment and Instrumentation, Medical, Automotive etc. DC Brushless motors do not use brushes for commutation of the current. The phase of the motor are electronically commutated. Comparative with DC Brushed motors and induction motors, DC Brushless motors have the followings advantages: -high speed ranges; - long operating life; - high efficiency; -better speed versus torque characteristics; - high dynamic response; - noiseless operation; Also, the ratio of torque provided to the size of the motor is higher, making it useful in applications where space and weight are limited. (authors)
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BRUSHLESS DC MOTOR BASED ON A COMMON DC SIGNAL
J.Karthikeyan; Dr.R.Dhanasekaran
2010-01-01
The objective of this project is to build a simple current controlled modulation technique for brushless dc motors. In electric traction and most other applications, a wide range of speed and torque control of the electric motor is required. The dc machine fulfills these requirements, but the dc machine requires constant maintenance. But the brushless permanent magnet motors do not have brushes and so they require less maintenance only. Brushless dc motors are widely used in applications whic...
Motor Brush Testing for Mars and Vacuum
Noon, Don E.
1999-01-01
Brush motors have been qualified and flown successfully on Mars missions, but upcoming missions require longer life and higher power. A test program was therefore undertaken to identify the best brush material for operation in the Mars atmosphere. Six different brush materials were used in 18 identical motors and operated under various load conditions for a period of four weeks in low-pressure CO2. All motors performed acceptably, with accumulated motor revolutions between 98 and 144 million revolutions, depending on load. A proprietary silver-graphite material from Superior Carbon (SG54-27) appears to be the best choice for long life, but even the stock copper-graphite brushes performed reliably with acceptable wear. The motors from the CO2 test were then cleaned and run in vacuum for 2 weeks. The difference in results was dramatic, with 5 motors failing catastrophically and wear rates increasing by orders of magnitude for the SG54-27 material. Three brush materials survived the test with no failures: SG54-27 with a proprietary Ball Aerospace impregnation, a silver-graphite-molybdenum disulfide material from Superior Carbon (SG59), and a copper sulfide-graphite material also from Superior Carbon (BG91).
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...
Sensorless starting of a brushless D.C. motor
Ghosh, Ramit
1988-01-01
Permanent magnet brushless DC motors that have found wide application in high performance servo drives need absolute rotor position sensors. However, the cost of the position sensor limits the use of brush less DC motors for low performance applications such as automotive and home appliances. A sensorless starting scheme for brushless DC motors is studied in this thesis. A hardware implementation of the starting scheme has been instrumented. The modeling and simulation of the ...
Digital current loop control of a brushless DC motor
Cox, Noel Patrick
1987-01-01
Servo control of motors has important applications m such areas as robotics, numerically controlled machines and 'fly by wire* aircraft systems. The development of high power high coercivity magnetic alloys, such as samarium cobalt, has led to the advent of the brushless dc machine, which offers a more advantageous alternative to the brush machine. The brushless DC machine eliminates the need for brush contacts, through the use of electronic commutation. It has better thermal charact...
Improved Rotor Speed Brushless DC Motor Using Fuzzy Controller
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.
Halbach array DC motor/generator
Energy Technology Data Exchange (ETDEWEB)
Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)
1998-01-01
A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.
Halbach array DC motor/generator
Energy Technology Data Exchange (ETDEWEB)
Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.
1998-01-06
A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An ``inside-out`` design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then ``switched`` or ``commutated`` to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives. 17 figs.
Power losses in outside-spin brushess DC motor
Andrada Gascón, Pedro; Torrent Burgués, Marcel; Perat Benavides, Josep Ignasi; Blanqué Molina, Balduino
2004-01-01
Outside-spin brushless D.C. motors are an alternative to conventional D.C. brush permanent magnet motors, especially in applications that require low power and costs and in which high inertia effects are advantageous. This paper presents a procedure for computing power losses in these kinds of machines. Expressions are derived for predicting copper losses, power interrupter losses, stator iron losses in the tooth and in the yoke, mechanical losses, friction and windage. Stray l...
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…
DC Motor Control Predictive Models
Ravinesh Singh; Godfrey C. Onwubolu; Krishnileshwar Singh; Ritnesh Ram
2006-01-01
DC motor speed and position controls are fundamental in vehicles in general and robotics in particular. This study presents a mathematical model for correlating the interactions of some DC motor control parameters such as duty cycle, terminal voltage, frequency and load on some responses such as output current, voltage and speed by means of response surface methodology. For this exercise, a five-level full factorial design was chosen for experimentation using a peripheral interface controller...
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.
Energy Technology Data Exchange (ETDEWEB)
Kraftmakher, Yaakov, E-mail: krafty@mail.biu.ac.i [Department of Physics, Bar-Ilan University, Ramat-Gan 52900 (Israel)
2010-07-15
Experiments with an electric motor provide good opportunity to demonstrate some basic laws of electricity and magnetism. The aim of the experiments with a low-power dc motor is to show how the motor approaches its steady rotation and how its torque, mechanical power and efficiency depend on the rotation velocity. The tight relationship between the mechanical and electrical parameters of the motor is clearly seen. The measurements are carried out with the ScienceWorkshop data-acquisition system and the DataStudio software from PASCO scientific. The experiments are well related to university courses of electricity and magnetism and can be used in undergraduate laboratories or for lecture demonstrations.
International Nuclear Information System (INIS)
Experiments with an electric motor provide good opportunity to demonstrate some basic laws of electricity and magnetism. The aim of the experiments with a low-power dc motor is to show how the motor approaches its steady rotation and how its torque, mechanical power and efficiency depend on the rotation velocity. The tight relationship between the mechanical and electrical parameters of the motor is clearly seen. The measurements are carried out with the ScienceWorkshop data-acquisition system and the DataStudio software from PASCO scientific. The experiments are well related to university courses of electricity and magnetism and can be used in undergraduate laboratories or for lecture demonstrations.
DC Motor Control Predictive Models
Directory of Open Access Journals (Sweden)
Ravinesh Singh
2006-01-01
Full Text Available DC motor speed and position controls are fundamental in vehicles in general and robotics in particular. This study presents a mathematical model for correlating the interactions of some DC motor control parameters such as duty cycle, terminal voltage, frequency and load on some responses such as output current, voltage and speed by means of response surface methodology. For this exercise, a five-level full factorial design was chosen for experimentation using a peripheral interface controller (PIC-based universal pulse width modulation (PWM H-Bridge motor controller built in-house. The significance of the mathematical model developed was ascertained using regression analysis method. The results obtained show that the mathematical models are useful not only for predicting optimum DC motor parameters for achieving the desired quality but for speed and position optimization. Using the optimal combination of these parameters is useful in minimizing the power consumption and realization of the optimal speed and invariably position control of DC motor operations.
Simultaneous Sensing cum Actuating DC Motor
Daraeepour, Ali; Karimi Varkani, Ali
2013-01-01
This work aims to develop a new measurement method to monitor the speed, velocity, and mechanical impedance of a DC motor platform without using conventional sensors. A back-drivable DC motor platform is developed which uses the motor as sensor cum actuator. The sensor cum actuator determines the mechanical impedance of the moving load. By calibrating the Transduction Matrix of the DC motor the angular velocity and torque load of the motor can be measured via measuring the motor's electrical ...
A 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.
Control of Separately Excited Dc Motor
ALIM Abdul; ABUBOKAR Talukdar
2011-01-01
Speed control of separately excited DC motor and performance analysis by software simulation has been done. The objective of this paper is to describe the principle of DC motor speed control using nonlinear combined control (armature voltage and field current) and proportional integral- derivative (PID) controller for DC motor drives. In the field control mode, the armature voltage is held constant and an adjustable voltage is applied to the field.Simulation models of separately excited DC mo...
PWM ZCS DC Motor Drive and DC Power Supply
Bardia Montazeri
2011-01-01
Following the extension and increase in capacity of power electronic elements, many convertors with special applications have been designed. Convertors such as rectifiers, AC and DC power supplies, AC and DC drivers and so on. At present, optimization of these convertors, decreasing loss and bringing down the electromagnetic interference are desired. In this paper, a DC to DC convertor for controlling the speed of DC motor is designed and one prototype is presented in which switching losses...
Three-phase Brushless DC Motor Control
Fang, Xinwei
2012-01-01
With the increasing demand of using electric power and unpleasant of using brush motor; the usage of Three-phase Brushless Motor has been significantly developed in industry. However, with market-standard motor driver, there are many inconveniences for small institutions or companies in either application developments or education purposes. For instance, the size and the price of driver. Therefore, the object of this thesis was design modular sections (Software program, PCB driver and PCB con...
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BRUSHLESS DC MOTOR BASED ON A COMMON DC SIGNAL
Directory of Open Access Journals (Sweden)
J.Karthikeyan
2010-06-01
Full Text Available The objective of this project is to build a simple current controlled modulation technique for brushless dc motors. In electric traction and most other applications, a wide range of speed and torque control of the electric motor is required. The dc machine fulfills these requirements, but the dc machine requires constant maintenance. But the brushless permanent magnet motors do not have brushes and so they require less maintenance only. Brushless dc motors are widely used in applications which require wide range of speed and torque control because of its low inertia, fast response, high reliability and maintenance free. This current controlled technique is based on the generation of quasi- square wave currents using only one controller for the three phases. The current control strategy uses a triangular carrier for the power transistors which is simpler and more accuratethan any other options. The advantages of this technique are: a The stator currents are completely characterized by their maximum amplitude , b The three phases are controlled with the same dc component , and then the phase currents are kept at exactly the same magnitude I max, c The dc link current measurement is not required .d phase currents are kept balanced and phase over currents are eliminated.
MODELING PENGATURAN KECEPATAN MOTOR DC DENGAN SIMULINK
IN Satya Kumara
2009-01-01
Motor arus searah (motor dc), khususnya tipe penguatan terpisah, memiliki karakteristik pengaturan kecepatan yang sangat baik, karena flux-producing dan torque-producing components currents dalam keadaan independen satu sama lain. Hal ini terjadi karena konstruksi fisik motor dc dimana komponen arus yang menghasilkan torsi dan komponen arus yang menghasilkan fluk sudah terdekopel secara alami. Dengan demikian pengaturan kecepatan motor bisa dilakukan dengan teknik pengaturan yang tidak rumit ...
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.
MODELING PENGATURAN KECEPATAN MOTOR DC DENGAN SIMULINK
Directory of Open Access Journals (Sweden)
IN Satya Kumara
2009-06-01
Full Text Available Motor arus searah (motor dc, khususnya tipe penguatan terpisah, memiliki karakteristik pengaturan kecepatan yang sangat baik, karena flux-producing dan torque-producing components currents dalam keadaan independen satu sama lain. Hal ini terjadi karena konstruksi fisik motor dc dimana komponen arus yang menghasilkan torsi dan komponen arus yang menghasilkan fluk sudah terdekopel secara alami. Dengan demikian pengaturan kecepatan motor bisa dilakukan dengan teknik pengaturan yang tidak rumit dan tidak memerlukan perangkat keras mahal. Pengaturan kecepatan motor dc bisa dilakukan dengan pengaturan arus jangkar atau arus medan secara bebas dan/atau simultan. Pemilihan variabel kontrol ini tergantung dari daerah operasi dari drive.Untuk pengaturan kecepatan dari diam sampai dengan kecepatan nominal dilakukan dengan pengaturan arusjangkar dimana arus medan dijaga konstan. Sedangkan untuk pengaturan kecepatan di atas kecepatan nominal dilakukan dengan memperkecil arus medan (field weakening. Dalam paper ini akan dibahas modeling pengaturan motor dc penguatan terpisah yang disimulasikan dengan Matlab Simulink.
Constant Current Models of Brushless DC Motor
Krykowski, Krzysztof; Hetmańczyk, Janusz
2013-01-01
Two constant current models of Permanent Magnet Brushless Direct Current Motor (PM BLDC) are presented in the paper. In the first part of the paper principle of operation, basic properties and mathematical equations describing PM BLDC models are given. Then, two different constant current models of PM BLDC motor are considered: In the first model, PM BLDC motor is approximated with dc motor; in the second model, modified constant current model is applied with additional block, which is used t...
The Interface communicate to DC motor control
Retuerta Cornet, Iu
2010-01-01
Mälardalens University makes internationally recognized research in the field of Robotics. This technological work shows an electrical engine control developed at Mälardalens University. The target of this project is to make an interface able to communicate with a platform/robot to move the platform/robot using an electric engine control in ADA language. There are different kinds of electric engines, AC, DC, stepper motor, etc. This control focuses on DC electric motors beca...
DC Motor Drive with PFC Rectifier
Lascu Mihaela; Lascu Dan; Popovici Adrian; Popescu Viorel; Băbăiţă Mircea; Negoiţescu Dan
2008-01-01
The goal of this work is to study theperformances of a hybrid controller used to controlDC Motor drive with a single-phase power factorcorrection rectifier. This study is made usingcomputer simulation (Simulink). The first part isdevoted to the control system of the DC Motors. Inthe second part, the design of the hybrid controllerwill be presented. The third part is the design ofthe fast response single-phase boost power factorcorrection rectifier. The last parts are devoted tosimulation and ...
Performance curves of a series DC motor predicted using parametric finite element analysis
Energy Technology Data Exchange (ETDEWEB)
Ebben, R.N. (Milwaukee Electric Tool Corp., Brookfield, WI (United States)); Brauer, J.R.; Lizalek, G.C.; Cendes, Z.J. (Ansoft Corp., Pittsburgh, PA (United States))
1999-05-01
Direct-current motors with brushes are commonly used for portable tools and other appliances. A procedure is derived that uses finite element analysis to predict the performance curves of a typical series dc motor. A number of different analyses are made with parametric variations of current and rotor position. The computed torque-speed and current-speed curves are shown to agree closely with the measured curves.
Sitompul, Fuad Rahim
2015-01-01
Motor listrik merupakan perangkat elekromagnetis yang mengubah energi listrik menjadi energi mekanik. Motor DC memerlukan tegangan searah pada kumparan medan untuk diubah menjadi energi mekanik. Energi mekanik ini digunakan sebagai penggerak peralatan listrik seperti pompa,penggerak kipas angin, lift dan lain-lain. Karena penggunaannya yang cukup luas maka kinerjanya harus baik. Kinerja suatu motor DC dikatakan baik jika efisiensi motor tersebut tinggi. Hal itu dapat dicapai dengan mengatur b...
Computerized Torque Control for Large dc Motors
Willett, Richard M.; Carroll, Michael J.; Geiger, Ronald V.
1987-01-01
Speed and torque ranges in generator mode extended. System of shunt resistors, electronic switches, and pulse-width modulation controls torque exerted by large, three-phase, electronically commutated dc motor. Particularly useful for motor operating in generator mode because it extends operating range to low torque and high speed.
Gravity Compensation Technique Uses Small dc Motor
Hollow, Richard
1988-01-01
Small dc servomotor powered by simple constant-current source and with suitable gearing used to cancel effect of gravity upon load. Lead-screw positioning system has load counterbalanced by small supplementary motor powered by constant current source. Motor lighter and more compact alternative to counterbalance. Used in variety of mechanical systems where load positioned or accelerated in vertical plane.
Circuit Regulates Speed Of dc Motor
Weaver, Charles; Padden, Robin; Brown, Floyd A., Jr.
1990-01-01
Driving circuit regulates speed of small dc permanent-magnet motor in tape recorder. Two nested feedback loops maintain speed within 1 percent of constant value. Inner loop provides coarse regulation, while outer loop removes most of variation in speed that remains in the presence of regulation by the inner loop. Compares speed of motor with commanded speed and adjusts current supplied to motor accordingly.
Three phase full wave dc motor decoder
Studer, P. A. (Inventor)
1977-01-01
A three phase decoder for dc motors is disclosed which employs an extremely simple six transistor circuit to derive six properly phased output signals for fullwave operation of dc motors. Six decoding transistors are coupled at their base-emitter junctions across a resistor network arranged in a delta configuration. Each point of the delta configuration is coupled to one of three position sensors which sense the rotational position of the motor. A second embodiment of the invention is disclosed in which photo-optical isolators are used in place of the decoding transistors.
A 30 mm Wide DC-Driven Brush-Shaped Cold Air Plasma Without Airflow Supplement
International Nuclear Information System (INIS)
This paper reports a cold atmospheric pressure DC-driven air plasma brush. Three stainless steel needles are symmetrically mounted on a slot shaped PVC slab to act as the electrodes. The brush driven by a direct current (DC) power supply can generate an air plasma glow up to 30 mm wide with no inert gas addition and no air flow supplement. The plasma glow appears uniform no matter what kinds of material are processed. The measured current and the simulated current all show that each pulsed discharge including two peaks always occurs for different gaps between electrodes. Emission spectra measurement result shows that the obtained rotational temperatures are 300 K and the vibrational temperatures are 2250 K. Some reactive species are presented in the plasma glow, which suggest that the proposed plasma brush is beneficial to practical applications. (low temperature plasma)
Sistem Kendali Kecepatan Motor DC Dengan Menggunakan Mikrokontroler
Ompusunggu, Chandra Putra
2012-01-01
Motor DC merupakan alat pengubah energi listrik menjadi energi gerak yang dicatu oleh tegangan DC. Kecepatan putaran dapat diatur dengan mengubah nilai tegangan atau arus yang masuk ke motor. Salah satu cara pengaturan kecepatan pada motor DC yaitu dengan menggunakan DC-DC konverter atau sering disebut dengan chopper. Chopper adalah suatu alat yang berfungsi untuk mengubah tegangan DC tetap menjadi tegangan DC yang bervariasi. Tegangan keluaran chopper dapat lebih besar atau lebih kecil dari ...
Nasution, Abdul Rachman Hakim
2011-01-01
Motor arus searah merupakan salah satu motor listrik yang sering digunakan oleh industri – industri yang membutuhkan hasil kerja yang konstan. Hal tersebut dikarenakan motor arus searah menggunakan sumber tegangan DC sebagai sumber tegangan nya.Dan untuk kebutuhan yang semakin lama semakin kompleks yaitu kebutuhan yang menginginkan adanya variasi dari kecepatan motor arus searah maka ada beberapa metode yang bisa digunakan dan salah satunya adalah pengaturan kecepatan motor ...
PWM ZCS DC Motor Drive and DC Power Supply
Directory of Open Access Journals (Sweden)
Bardia Montazeri
2011-01-01
Full Text Available Following the extension and increase in capacity of power electronic elements, many convertors with special applications have been designed. Convertors such as rectifiers, AC and DC power supplies, AC and DC drivers and so on. At present, optimization of these convertors, decreasing loss and bringing down the electromagnetic interference are desired. In this paper, a DC to DC convertor for controlling the speed of DC motor is designed and one prototype is presented in which switching losses is close to zero and it has a very low electromagnetic interference. In this convertor, the switches turn on and turn off approximately with zero current. The speed of motor is controlled by PWM. This plan includes advantages of PWM and resonant convertors.The disadvantages, such as ; high switching losses and changing switching frequency for controlling output were removed. As switching frequency has a direct relation with switching losses, when losses decreased, it is possible to increase the frequency, then volume and weight of passive filter elements can be decreased. Besides, by decreasing the losses , the need of heatsink , which is the heavy and voluminous elements of convertors, can be removed.
DC Motor Drive with PFC Rectifier
Directory of Open Access Journals (Sweden)
Lascu Mihaela
2008-05-01
Full Text Available The goal of this work is to study theperformances of a hybrid controller used to controlDC Motor drive with a single-phase power factorcorrection rectifier. This study is made usingcomputer simulation (Simulink. The first part isdevoted to the control system of the DC Motors. Inthe second part, the design of the hybrid controllerwill be presented. The third part is the design ofthe fast response single-phase boost power factorcorrection rectifier. The last parts are devoted tosimulation and experimental results.
Cascade Speed Control Of Dc Motor
Anagha, Ranjith K; Anand C.P; Rahul Das; Anusha A.S
2014-01-01
Abstract: This paper presents a MATLAB aided Cascade designed controller to control and monitor the DC motor speed. First, design the driver circuit of the DC motor and use the microcontroller PIC16F877A to collect the feedback signals from the current sensor and optical encoder. The measured speed and current are serially transmitted to PC using RS232. By the MATLAB aided cascade controller, where inner loop is the current loop and outer loop is the speed loop, the parameters are adjusted to...
Remote PID control of a DC Motor
Silva, V.; Carvalho, V.; R. M. Vasconcelos; Soares, F.
2007-01-01
This paper presents a remote experiment for controlling a DC motor. This work was part of a final year graduation project of the Industrial Electronics Course at the University of Minho. It was implemented by an undergraduate student for student use. The experiment is controlled using a PID algorithm programmed in LabView environment. The remote user can test PID digital algorithms and parameters, change reference velocity values and register the motor output velocity profile.
Remote PID Control of a DC Motor
Directory of Open Access Journals (Sweden)
V. Silva
2007-08-01
Full Text Available This paper presents a remote experiment forcontrolling a DC motor. This work was part of a final yeargraduation project of the Industrial Electronics Course atthe University of Minho. It was implemented by anundergraduate student for students use. The experiment iscontrolled using a PID algorithm programmed in LabViewenvironment. The remote user can test PID digitalalgorithms and parameters, change reference velocity valuesand register the motor output velocity profile.
Series BK contactless DC motors
Energy Technology Data Exchange (ETDEWEB)
Buss, V.A.; Vevyurko, I.A.; Ivanov, G.V.; Kuzmin, V.N.; Mikhaylov, E.M.; Stoma, A.S.
1985-05-01
Implementation of principles described in a previous work has allowed development and introduction to series production of a motor series including 36 standard types and sizes. The series is designed to operate at a nominal voltage of 27 V and includes two main versions: the BK-1 for fans and BK-2 for pumps. The BK-2 motor differs from the BK-1 in that it has a thin sealed sleeve of high impedance nonmagnetic metal separating the rotor and stator cavities, allowing the rotor of the BK-2 to operate in the fluids or other media being pumped. Characteristics of the motors are presented. The BK-1316 has an operating life of about 50,000 hours at nominal speed of 6000 rpm. The experience of series production of the BK motors has shown the need for further improvement of the design and technology in order to decrease the number of metal cutting, winding and assembly operations required. The use of plastic structures is suggested to this end.
CheshmehBeigi, Hassan Moradi
2015-01-01
Abstract. This paper presents the design optimization and accurate electromagnetic field analysis of an 18-12 there phase Brushless dc motor (BLDCM) by using a three-dimensional Finite-Element analysis. Proposed motor will provide a wide range of air-gap flux control by a dc assisted field winding which is replaced with the permanent magnet in the rotor structure. In proposed BLDCM a simple dc current control is used and no brushes or slip rings are required to perform this control. To achiev...
Iron loss analysis in linear dc motor
Energy Technology Data Exchange (ETDEWEB)
Hippner, M.; Yamada, H.; Mizuno, T.
1999-09-01
The paper presents analysis of iron loss in a linear dc motor with a solid iron core. The analysis is based on a finite element magnetic field solution. The influence of magnetic bias on the iron loss is discussed. The results of the iron loss calculations are verified experimentally.
DC Motor Power Supply for Electric Kart
Vītols, K; Reinberg, N.; Galkins, I
2010-01-01
The aim of this paper is to provide thumb rules for developing power supply for an electric kart with a DC motor. Article includes consideration of battery system and designing process of power converter. A battery selection flowchart is introduced. Converter operation in buck mode is tested and evaluated. Needed improvements are discussed
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.
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
Electronically commutated dc motors for electric vehicles
Maslowski, E. A.
1981-01-01
A motor development program to explore the feasibility of electronically commutated dc motors (also known as brushless) for electric cars is described. Two different design concepts and a number of design variations based on these concepts are discussed. One design concept is based on a permanent magnet, medium speed, machine rated at 7000 to 9000 rpm, and powered via a transistor inverter power conditioner. The other concept is based on a permanent magnet, high speed, machine rated at 22,000 to 26,000 rpm, and powered via a thyristor inverter power conditioner. Test results are presented for a medium speed motor and a high speed motor each of which have been fabricated using samarium cobalt permanent magnet material.
Neuro-Genetic Adaptive Optimal Controller for DC Motor
Mahmoud Mohamed Elkholy; Mohammed Abd Elhameed Abd Elnaiem
2014-01-01
Conventional speed controllers of DC motors suffer from being not adaptive, this is because of the nonlinearity in the motor model due to saturation. Structure of DC motor speed controller should vary according to its operating conditions, so that the transient performance is acceptable. In this paper an adaptive and optimal Neuro-Genetic controller is used to control a DC motor speed. GA will be used first to obtain the optimal controller parameter for each load torque and motor refer...
SMALL-SIGNAL ANALYZING OF SEPARATELY EXCITED DC MOTOR FED DC - DC CHOPPER
İSMAİL COŞKUN
1999-01-01
Choppers are widely used in order to get smooth speed characteristics of DC motors. If the load or input voltage is changed, a feedback control technique is used to get the constant speed. To design the proper feedback control, the transfer function of the chopper-motor combination should be kno\\vn. ln this study, the effort was given to obtain the general black diagram, inciurling the field current and aı1na ture current of chopper-fed DC motor. It can be seen from the black diagram that the...
Projective DC Motor Control Under Disturbance Torques
Zuglem, Ismael; Doruk, Resat Ozgur
2016-01-01
In this study, we will present the design of a linear DC motor controller by projective linear qudratic servo feedback (P-LQSF) and analyze its stability through the notion of input to state stability theory. The projective control approach allows one to design an output feedback controller which approximates the eigenspectrum of a full state feedback closed loop. The performance and stability of the controllers will be analyzed both theoretically and through simulation. Apart from basic line...
Implementing two DC motor speed control strategies
Directory of Open Access Journals (Sweden)
José Danilo Rairán Antolines
2010-05-01
Full Text Available While linear control techniques for dynamic systems have been widely tested, systems are not linear in practice. This means that controllers must be re-tuned to make them useful in an experimental setup. This article presents the tuning and re-tuning process for two control strategies: a PID and an algorithm based on the choice of overall transfer function controlling a DC permanent magnet motor. The algorithms’ performance is evaluated and some recommendations are made.
Sensorless control of a DC series motor
Amet, Leonardo; Ghanes, Malek; Barbot, Jean-Pierre
2013-01-01
In this paper a sensorless speed control for a DC series motor is presented. In this context, an observability analysis is performed, revealing that the system is inobservable at zero current. In order to overcome this problem we propose the joint use of an estimator and an observer, the latter being based on second order sliding modes techniques. The simulation results highlight the good performance of the proposed control.
Speed Control of Separately Excited DC Motor
Moleykutty George
2008-01-01
This paper proposes the speed control of a separately excited dc motor (SEDM) by varying armature voltage. The novelty of this paper lies in the application of nonlinear autoregressive-moving average (NARMA)L2 controller for the speed control of SEDM. This paper also discusses speed control of a SEDM using chopper circuit. The performance of the proposed system has been compared with the traditional one using conventional controllers. The entire system has been modeled using MATLAB 7.0 toolbo...
Implementing two DC motor speed control strategies
José Danilo Rairán Antolines; Yeni Paola Sierra Niño; Néstor Iván Moreno Roballo
2010-01-01
While linear control techniques for dynamic systems have been widely tested, systems are not linear in practice. This means that controllers must be re-tuned to make them useful in an experimental setup. This article presents the tuning and re-tuning process for two control strategies: a PID and an algorithm based on the choice of overall transfer function controlling a DC permanent magnet motor. The algorithms’ performance is evaluated and some recommendations are made.
Intelligent Controller for Networked DC Motor Control
B. Sharmila; N. Devarajan
2010-01-01
This paper focuses on the feasibility of Neural Network controller for Networked Control Systems. The Intelligent Controllers has been developed for controlling the speed of the Networked DC Motor by exploiting the features of Neural Networks and Fuzzy Logic Controllers. The major challenges in Networked Control Systems are the network induced delays and data packet losses in the closed loop. These challenges degrade the performance and destabilize the systems. The aim of the proposed Neural ...
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。
Institute of Scientific and Technical Information of China (English)
付朝阳; 刘景林; 金英汉
2012-01-01
In order to improve the reliability of the system, the redundancy technology is introduced into the design of permanent magnet BLDCM. Sections 1 through 3 of the full paper explain our design, computer simulation and experimental research; we believe that our design is effective. The core of section 1 consists of; (1) two kinds of stator structure are designed, including one slot and two slots; ( 2 ) the mathematical model of the motor is set up; the winding inductance is analyzed and calculated, and the relationship between the winding inductance and mutual inductance is deduced. The core of section 2 is that, according to the mathematical model, the parameters of the motor are designed and the rotational speed and torque are simulated. The core of section 3 consists of; (1) the motor is tested on the MAGTROL testing system; ( 2 ) the mechanical characteristic curves of both kinds of stator structure under different working modes are compared. The simulation results are given in Figs. 3 through 6 and the experimental results are given in Figs. 7 through 12. Both the simulation and the experiment results show that; (1) the motor of each kind can achieve good dynamic characteristics and the torque is increased by 100% with two sets of windings; ( 2) two sets of winding did not affect motor performance, but it did indeed greatly improve the system reliability.%为了提高系统可靠性,将余度技术引入到永磁无刷直流电机设计中.设计了2种定子绕组方式,包括同槽嵌放和隔槽嵌放结构.建立了2种结构下的数学模型,对绕组电感进行了分析计算,推导了绕组自感和互感之间的关系.根据数学模型,设计了双余度永磁无刷直流电机的具体结构参数,对转速和转矩进行了仿真.利用magtrol测试系统对双余度永磁无刷直流电机进行了实验,对比分析了2种结构不同工作模式下的机械特性曲线.实验结果表明:2种结构的双余度无刷直流电机在运行过程
Silva-Ortigoza, R.; C. Márquez-Sánchez; F. Carrizosa-Corral; M. Antonio-Cruz; J. M. Alba-Martínez; Saldaña-González, G.
2014-01-01
This paper presents a hierarchical controller that carries out the angular velocity trajectory tracking task for a DC motor driven by a DC/DC Buck converter. The high level control is related to the DC motor and the low level control is dedicated to the DC/DC Buck converter; both controls are designed via differential flatness. The high level control provides a desired voltage profile for the DC motor to achieve the tracking of a desired angular velocity trajectory. Then, a low level control ...
Speed Control of Separately Excited DC Motor
Directory of Open Access Journals (Sweden)
Moleykutty George
2008-01-01
Full Text Available This paper proposes the speed control of a separately excited dc motor (SEDM by varying armature voltage. The novelty of this paper lies in the application of nonlinear autoregressive-moving average (NARMAL2 controller for the speed control of SEDM. This paper also discusses speed control of a SEDM using chopper circuit. The performance of the proposed system has been compared with the traditional one using conventional controllers. The entire system has been modeled using MATLAB 7.0 toolbox. It has been found that both PI and hysteresis current controllers could be eliminated by the use of NARMA-L2 controller.
Speed Control of DC Motor using AC/AC/DC Converter Based on Intelligent Techniques
Directory of Open Access Journals (Sweden)
Rakan Kh Antar
2013-05-01
Full Text Available This paper describes the application of ac/ac/dc and ac/dc converters to control the speed of a separately excited DC motor. Artificial neural network and PI controller are trained to select the desired values of firing angles for triggering thyristors of the ac/ac/dc and ac/dc bridge converters in order to control the speed of the dc motor at a desired value with constant and different load torques in order to obtain the best speed response. Simulation results show that the rising time for ac/dc and ac/ac/dc converters at 250rpm are reduced about 79% and 89% respectively, while delay time it reduced about 69% and 64% respectively. Therefore, speed response of the dc motor is more efficient for closed loop system compared with open loop also the response of ac/ac/dc converter is better than ac/dc converter.
Rotor position sensor switches currents in brushless dc motors
1965-01-01
Reluctance switch incorporated in an induction motor is used for sensing rotor position and switching armature circuits in a brushless dc motor. This device drives the solar array system of an unmanned space satellite.
Simulation of Brushless DC Motor using Direct Torque Control
Mrs.G. Kusuma; S. Rukhsana Begum
2014-01-01
This paper deals with modelling of three phases brushless dc motor with MATLAB/SIMULINK software BLDC motor have advantages according to brushless dc motor and induction motor’s. They have improve speed torque charactistics, high efficiency high transient response and small size. It approaches for reducing the torque ripples of BLDC motor using DTC, by using control technique’s ,but present work mainly concentrate on advanced method. The whole drive system is simulated based o...
Voice-Based Control of a DC Servo Motor
Musaab Hassan; Hammam Mahjoub; Mohammed Obed
2012-01-01
Problem statement: Motors play a very important role in our life and among which is the DC servo motors. The techniques of controlling these DC motors are plenty, among which is sound. In this study, a voce-based technique was implemented to control the speed and the direction of rotation for a DC motor. Approach: A Microcontroller-based electronic control circuit was designed and implemented to achieve this goal. Results: The speed of the motor was controlled, in both directions, using pulse...
Summary of electric vehicle dc motor-controller tests
Mcbrien, E. F.; Tryon, H. B.
1982-01-01
The differences in the performance of dc motors are evaluated when operating with chopper type controllers, and when operating on direct current. The interactions between the motor and the controller which cause these differences are investigated. Motor-controlled tests provided some of the data the quantified motor efficiency variations for both ripple free and chopper modes of operation.
Artificial Intelligent Controller for a DC Motor
Delavari, Hadi; Ranjbar Noiey, Abolzafl; Minagar, Sara
The Speed and position control of DC motors is addressed in this paper. An optimal intelligent control scheme is proposed for the system. Preliminary a PID controller is designed using Genetic Algorithms (GA). The proposed controller is implemented by using optimal integral state feedback control with GA and Kalman filter. In the proposed scheme, performance depends on choosing weighting matrices Q and R in the cost function, and accordingly GA is used to find these proper weighting matrices. In order to reduce the control performance degradation due to system parameters variation, a Kalman filter is gained. The performance of the proposed technique (ISF) is compared with PID controller. Computer simulation validates the effectiveness of the proposed scheme even in presence of uncertainties.
Speed Control of DC Motor using AC/AC/DC Converter Based on Intelligent Techniques
Rakan Kh Antar
2013-01-01
This paper describes the application of ac/ac/dc and ac/dc converters to control the speed of a separately excited DC motor. Artificial neural network and PI controller are trained to select the desired values of firing angles for triggering thyristors of the ac/ac/dc and ac/dc bridge converters in order to control the speed of the dc motor at a desired value with constant and different load torques in order to obtain the best speed response. Simulation results show that the rising time fo...
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.
Design optimization of brushed permanent magnet D C motor by genetic algorithm
International Nuclear Information System (INIS)
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
Bidirectional soft-switching converter-fed DC motor drives
Ching, TW; Chan, CC; Chau, KT
1998-01-01
Two new soft-switching DC-DC power converters, with the capabilities of bidirectional power flow and soft-switching (either zero-voltage transition or zero-current transition) are developed for DC motor drives. The proposed bidirectional zero-voltage-transition power converter possesses the definite advantages that both main transistors and rectifiers can switch with zero-voltage switching (ZVS) and unity device stresses during both motoring and regenerating modes of operation, while both the...
Induction Motor Control through AC/DC/AC Converters
Elfadili, Abderrahim; Giri, Fouad; Ouadi, Hamid; El Magri, Abdelmounime; Dugard, Luc; Abouloifa, Abdelmajid
2010-01-01
We consider the problem of controlling inductions motors driven through AC/DC rectifiers and DC/AC inverters. The control objectives are threefold: (i) forcing the motor speed to track a reference signal, (ii) regulating the DC Link voltage, (iii) assuring a satisfactory power factor correction (PFC) with respect to the power supply net. First, a nonlinear model of the whole controlled system is developed in the Park-coordinates. Then, a nonlinear multi-loop controller is synthesized using th...
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...
SMALL-SIGNAL ANALYZING OF SEPARATELY EXCITED DC MOTOR FED DC - DC CHOPPER
İsmail COŞKUN
1999-01-01
Choppers are widely used in order to get smooth speed characteristics of DC motors. If the load or input voltage is changed, a feedback control technique is used to get the constant speed. To design the proper feedback control, the transfer function of the chopper-motor combination should be kno\\vn. ln this study, the effort was given to obtain the general black diagram, inciurling the field current and aı1na ture current of chopper-fed DC motor. It can be seen from the black diagram that th...
Dr. Mehrdad Jafarboland; Farid Salehi Nia; Ehsan Moosavi; Jafarshishehgar; Ali Asghar Yarali Darani
2014-01-01
Due to special working conditions and also the need for extend range of speed because of high maneuver power in different conditions, there uses DC motors in submarines. Double armature motor due to the ability to produce torque in extend range of speed as well as high confidentiality in comparison with regular DC motors has noticed considerably and has used as actuator system in submarines structures. In this paper, first we will survey a regular DC motor behavior in terms of working speed r...
Adaptive control of rigid-link electrically-driven robots actuated with brushless DC motors
International Nuclear Information System (INIS)
In this paper, we extend the work of [1] and [2] to design an adaptive controller for rigid-link electrically-driven (RLED) robot manipulators specifically actuated with Brushless Direct Current (BLDC) motors. In particular the adaptive controller presented is tailored to handle the multi-link dynamics of a rigid-link robot as opposed to a simple inertial load. Furthermore, the linear electrical dynamics of brushed DC motors used in the development of [1], are replaced with the multiple input nonlinear dynamics of BLDC motors. The result is an adaptive controller that guarantees globally asymptotic convergence of the link position tracking error in spite of parametric uncertainty throughout the entire electro-mechanical model
Adaptive control of rigid-link electrically-driven robots actuated with brushless DC motors
Energy Technology Data Exchange (ETDEWEB)
Bridges, M.M. [Univ. of Michigan, Ann Arbor, MI (United States); Dawson, D.M. [Clemson Univ., SC (United States)
1994-12-31
In this paper, we extend the work of [1] and [2] to design an adaptive controller for rigid-link electrically-driven (RLED) robot manipulators specifically actuated with Brushless Direct Current (BLDC) motors. In particular the adaptive controller presented is tailored to handle the multi-link dynamics of a rigid-link robot as opposed to a simple inertial load. Furthermore, the linear electrical dynamics of brushed DC motors used in the development of [1], are replaced with the multiple input nonlinear dynamics of BLDC motors. The result is an adaptive controller that guarantees globally asymptotic convergence of the link position tracking error in spite of parametric uncertainty throughout the entire electro-mechanical model.
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.
SPEED CONTROL OF DC MOTOR WITH PIC 16F877
Directory of Open Access Journals (Sweden)
İlhami ÇOLAK
2005-02-01
Full Text Available In this study, a PI controlled separately excited direct current (DC motor speed has been controlled using PIC 16F877 controller. In the PIC 16F877 programming as a PI controller, the speed of the motor is expected to follow the reference speed. Speed of the motor is measured by a tacho generator and then, the voltage applied to the motor is adjusted by a semiconductor power switch using pulse width modulation (PWM technique. Drive circuit was tested with 0.9 kW DC motor. Experimental results show that the drive circuit developed is very simple, useful, sensible, economical and flexible to apply for different applications.
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.
Directory of Open Access Journals (Sweden)
Dr. Mehrdad Jafarboland
2014-11-01
Full Text Available Due to special working conditions and also the need for extend range of speed because of high maneuver power in different conditions, there uses DC motors in submarines. Double armature motor due to the ability to produce torque in extend range of speed as well as high confidentiality in comparison with regular DC motors has noticed considerably and has used as actuator system in submarines structures. In this paper, first we will survey a regular DC motor behavior in terms of working speed range and efficiency in different powers. Then, some properties of a double armature motor will be comparison with a same regular DC motor case from the aspect of working speed range and efficiency factors
A Hybrid Model of a Brushless DC Motor
DEFF Research Database (Denmark)
Bendtsen, Jan Dimon; Hansen, Hans Brink; Kallesøe, Carsten Skovmose
2007-01-01
This paper presents a novel approach to modeling of a Brush-Less Direct Current Motor (BLDCM) driven by an inverter using hybrid systems theory. Hybrid systems combine continuous and discrete (event-based) dynamics, which is exactly the case in an inverter-driven BLDCM. The model presented in this...... work consists of a general automaton with discrete states, combined with a set of continuous dynamic equations describing the electro-mechanical behavior of the motor. One of the significant benefits of this strategy is that the model describes the motor under all possible operating conditions. The...
PID controller simulator software for DC motor of gamma scanning
International Nuclear Information System (INIS)
Mostly PID controller (Proportional-Integral-Derivative) has been used in industry. For certain applications, it can be used as a Proportional (P) model only, or as a Proportional-Integral (PI) model. The aim of this paper is to design a PID controller simulator software for DC motor which is used in gamma scanning system. A DC motor is described as a plant of SISO (Single Input Single Output) which is used for pulling down the load (detector + casing) and gamma radiation source (Co-60 + container) by using sling cable. A DC motor consist of an armature and a rotor, the equivalent circuit of DC motor is shown in a transfer function equation between output parameter (angular speed DC motor) and input parameter (voltage of DC motor). Methods used for the process of PID controller design is to arrange the PID controller parameter (Kc, Ti, Td) so that there are more PID controller transfer function model which are able to control angular speed of DC motor in stable condition, as design criteria requirement is needed. Design criteria requirement for control system are the settling time < 3 second, overshoot < 5%, rise time = 0.25 second, steady state gain = 1 and peak time < 3 second with step response reference 1 rad/second. The result of simulation gives several models of PID controller in function transfer equation which is similar with design criteria requirement in a equation of function transfer of order 2 for numerator and order 1 for denominator. (author)
Virtual test system for permanent-magnet DC motor
Institute of Scientific and Technical Information of China (English)
崔淑梅; 王悦; 柴凤; 吴红星; 刘宝廷; 程树康
2003-01-01
In order to obtain the primary parameters and operating characteristics of a DC motor without directlymeasuring its torque and rational speed, it is proposed to use a PC and a data acquisition card to acquire boththe dynamic and static data of armature current to establish the performance of a DC permanent-magnet motor.The accuracy and validity of this virtual test system proposed were verified by comparing the measurements madewith the system proposed with the measurements made with conventional torque meters. It is concluded from theresults of comparison that from the mathematic model established for the DC permant-magnet motors, both majorparameters and operating characteristics can be directly established for the DC motors without measuring theirtorques and rotational speed, a perfect on-line measurement and test system has been established for the DCpermanent-magnet motors using the theory of virtual test system. The system proposed features shorter test time,higher efficiency and lower cost.
A SPICE compatible model of permanent magnet DC motor drives
Chan, CC; Chau, KT
1995-01-01
A SPICE compatible model for the computer simulation of permanent magnet (PM) DC motor drives is presented. The key of the proposed model is to take into account the armature reaction and magnet demagnetization, hence the shift of operating point at load conditions can be considered. Making use of this model, the PSpice simulation of a typical PM DC motor drive is performed. Apart from the steady-state simulation, transient behaviours of the PM DC motor drive, including start-up, sudden load ...
Fractional order control of a DC motor with load changes
Copot, Cosmin; Muresan, Cristina; Ionescu, Clara-Mihaela; De Keyser, Robain
2014-01-01
This paper investigates the robustness of a fractional-order controller against the load changes of a DC motor. The gains and time constants of the DC motor are modified by means of a change in the brake. Two different setups of a DC motor, one with 25% brake and the other with 50% brake are considered in the experimental evaluation. The closed-loop performances of the fractional-order controller are compared with integer-order controller using the same performance criteria and the same tunin...
STEP RESPONS MOTOR DC MENGGUNAKAN METODA SINYAL KOMPRESI
Directory of Open Access Journals (Sweden)
Satrio Dewanto
2015-12-01
Full Text Available Output signal in the form of a step response of a DC motor can be obtained by providing the input signal to the motor in the form of a signal step directly. Step response obtained in this way usually contains a lot of noise. To reduce noise, this research was designed with the aim to get the step response using signal compression method in which the input signal is not a step but a signal with a specific shape given to the motor and if the output signal of the motor is compressed, it will obtain impulse response. Step response of the DC motor can be obtained by doing the integral to the impulse response. Step response which is obtained using signal compression method will be used to estimate parameters model of DC motor to see the validity of this method. The result of this research shows that the estimated value of the parameters from the step response has value closer to the value of the parameters given to the model of a DC motor. The conclusion of this research is the method of signal compression can be used to obtain the step response of a DC motor model. Further research will be conducted on the actual motor instead of using a mathematical model.
Permanent Magnet DC Motor Control Using Image Processing
Directory of Open Access Journals (Sweden)
Rohan Chadha, Jai Prakash
2012-10-01
Full Text Available There are many application that have been developed based on motor control in electronic and electrical field such as automation, flexible manufacturing system and computer integrated manufacturing. Various DC motor control techniques are used such as chopper circuits for dc motor control, using power MOS devices in drives and switched mode controller for DC motors. Also there are various microcontroller based DC motor controllers available but it will result in limitations regarding remote control applications of robotics. This work deals with the direction and speed control of Permanent Magnet dc motor through image processing in Matlab. Motor will be controlled on the basis of image of hand captured by webcam. Image will be acquired and processed through Image processing Programming in Matlab. On the basis of movement of hand on both the sides the motor will rotate in both directions clock-wise and anti-clockwise along with its speed control. Among various microcontrollers Atmega 16 8 bit microcontroller is used due to its high performance, low power, advanced architecture and many more features. The goal of this work is to obtain a microcontroller based PMDC motor control through image processing programming in Matlab which will result in remote control of wide range of robotic applications.
Simplified Design Methodology for a Slotless Brushless DC Motor
Markovic, Miroslav; Perriard, Yves
2006-01-01
The paper presents a simplified analytical method to design a small two-pole slotless brushless dc motor. Using only a few approximations, the motor analytical model is formulated to generate a system of equations. The system can be solved analytically, producing a motor design for given specifications. The method is used to design a motor with the specifications 150 W, 10'000 rpm, and 18 V.
DC Motor Parameter Identification Using Speed Step Responses
Wei Wu
2012-01-01
Based on the DC motor speed response measurement under a step voltage input, important motor parameters such as the electrical time constant, the mechanical time constant, and the friction can be estimated. A power series expansion of the motor speed response is presented, whose coefficients are related to the motor parameters. These coefficients can be easily computed using existing curve fitting methods. Experimental results are presented to demonstrate the application of this approach. In ...
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.
Abdullah
2010-01-01
Had designed a control and measuring instrument who can measure rotation speed and temperature from a dc motor and also control temperature from a dc motor with use two fans who actived otomaticly for defend dc motor rotation speed stability. The sensor was used for detecting speed rotation in this research is Optocoupler sensor and the sensor was used for measuring and control dc motor temperatur is LM 35 sensor. And the main of control from all system is microcontroller type AT89S52. All ...
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.
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.
Mathematical modeling of electromechanical processes in a brushless DC motor
Tkachuk, V. I.; V.I. Zhuk
2014-01-01
On the basis of initial assumptions, a mathematical model that describes electromechanical processes in a brushless DC electric motor with a salient-pole stator and permanent-magnet excitation is created.
Mathematical modeling of electromechanical processes in a brushless DC motor
Directory of Open Access Journals (Sweden)
V.I. Tkachuk
2014-03-01
Full Text Available On the basis of initial assumptions, a mathematical model that describes electromechanical processes in a brushless DC electric motor with a salient-pole stator and permanent-magnet excitation is created.
Universal Brushless-DC Motor Controller for Space Applications Project
National Aeronautics and Space Administration — The goal of this SBIR is to adapt an initial prototype ultra-miniature high-performance brushless-DC-motor controller, code named 'Puck', for use by NASA across a...
CLOSED LOOP SPEED CONTROL OF DC MOTOR USING PWM
Mangesh J Nemade
2015-01-01
In This work reveals the digital closed loop control system for speed control of DC motor using PWM technique. In present days the power semiconductor devices have co mpletely revolutionized the control of drives especially in the area of control usage of thyristors IGBT’s power MOSFET etc., was increased. The digital circuit can be interfaced to microcontroller. So that the speed can be controlled by Microcontroller there by making speed control of DC motor even more easil...
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
Directory of Open Access Journals (Sweden)
C. SUBBA RAMI REDDY
2011-06-01
Full Text Available This paper presents Hybrid fuzzy logic controller (HFLC for the well developed and sophisticated simulation model of Brush less DC (BLDC motor drive using MATLAB. The developed simulation model has been examined by the PID controller and HFLC. The performance of the controllers is evaluated more precisely from various simulation studies for variations in the load torque and speed of BLDC motor drive. A performance comparison of two controllers is also carried out by taking various performance measures such as settling time, steady state error, peak overshoot, the integral of the absolute value of the error (IAE and the integral of the time-weighted squared error (ITSE. The results confirm that the developed simulation model is very convenient for the precise evaluation of performance and the HFLC shows improved performance over the PID controller in terms of disturbance rejection or parameter variation.
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.
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.
Speed Control of an Eleven-Phase Brushless DC Motor
Morteza Azadi; Ahmad Darabi
2013-01-01
In this paper, an eleven-phase permanent magnet brushless DC motor fed by an eleven-leg two-level inverter is modeled and simulated. In order to produce trapezoidal back electromotive force waveforms by permanent magnet rotor, the motor has concentrated stator windings. The motor speed is controlled by Mamdani-type fuzzy incremental controller. The hysteresis modulation is used for switching operation. The simulation is carried out by Matlab/Simulink.
A.S. Oshaba; E.S. Ali
2013-01-01
This study presents an approach for the speed control of a permanent magnet DC motor drive via Pulse Width Modulation (PWM) technique and a DC/DC converter. The Particle Swarm Optimization (PSO) technique is used to minimize a time domain objective function and obtain the optimal controller parameters. The performance of the proposed technique has been evaluated using various types of disturbances including load torque variations. Simulation results illustrate clearly the robustness of the co...
The Model of Brushless Dc Motor Drive
Aurelijus Pitrėnas
2013-01-01
The research considered the operation, control, mathematical and simulation models of BLDC motor. A simplified idealized simulation model was designed and tested using Matlab Simulink software package. The simulation model uses Hall effect sensor signals for determining the rotor position. Simulation was done for Maxon, EC-4 pole 22 BL A series motor. The obtained model testing results deviate from the data supplied by the motor manufacturer by as little as 0.2–10.6%; consequently, the implem...
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
The Model of Brushless Dc Motor Drive
Directory of Open Access Journals (Sweden)
Aurelijus Pitrėnas
2013-05-01
Full Text Available The research considered the operation, control, mathematical and simulation models of BLDC motor. A simplified idealized simulation model was designed and tested using Matlab Simulink software package. The simulation model uses Hall effect sensor signals for determining the rotor position. Simulation was done for Maxon, EC-4 pole 22 BL A series motor. The obtained model testing results deviate from the data supplied by the motor manufacturer by as little as 0.2–10.6%; consequently, the implemented model is suitable for BLDC motor control study and research.Article in Lithuanian
Parameters identification of a permanent magnet DC motor
Energy Technology Data Exchange (ETDEWEB)
Salah, M. [Univ. College of Applied Science, Gaza, Palestine (Israel); Abdelati, M. [Islamic Univ. of Gaza, Gaza, Palestine (Israel)
2010-03-09
Due to precise, wide, simple, and continuous control characteristics, direct current (DC) motors have been commonly employed in many industrial applications such as electric vehicles, steel rolling mills, electric cranes, and robotic manipulators. Because of their lower cost and ease of controller implementation, DC motors are preferred over alternating current (AC) motors. System identification of DC motors is of great importance in control problems. Accurate mathematical models and their parameters are necessary when designing controllers. This paper addressed driver circuits and parameters identification of a permanent magnet DC motor. An experimental measurement of armature voltage, armature current and rotor speed were performed using a data acquisition module in order to identify the parameters of the motor. DAQ toolbox and Simulink in MATLAB were used to obtain test signals and perform analysis based on the nonlinear least square method. The extracted motor parameters produced consistent simulation results with experimental data. It was concluded that the proposed approach is simple, fast and accurate. 16 refs., 4 tabs., 9 figs.
Control Of Stepper Motor Movement By DC Voltage
International Nuclear Information System (INIS)
Instrumentation for controlling the power of reactor of TRIGA Mark II uses the stepper motor to move the control rod of neutron absorbers. The direction and speed of control rod movement are determined by the polarity and the amplitude of DC voltage as an error signal that is the difference of set point of power and the power of being measured on the control system. The unit of stepper motor controller of reactor instrumentation of TRIGA Mark II uses patent module of trade Mark of Vexta, USA. In this chance, the electronic circuit is made to function as the control of stepper motor movement by using the DC voltage to anticipate the problem may be faced in case of repair and maintenance of reactor instrumentation. As a result of experiment, it is stated that the control of motor movement by using DC voltage is performed into 2 stages. First, by making the oscillator that is proportional to the positive DC voltage. Secondly, by making the translator to translate the oscillator signal to be a logic pattern for controlling the movement of stepper motor. Translator and motor driver are made by using the L297 and L298 as a pair of stepper motor controller of SGSTHOMSON
Directory of Open Access Journals (Sweden)
A.S. Oshaba
2013-05-01
Full Text Available This study presents an approach for the speed control of a permanent magnet DC motor drive via Pulse Width Modulation (PWM technique and a DC/DC converter. The Particle Swarm Optimization (PSO technique is used to minimize a time domain objective function and obtain the optimal controller parameters. The performance of the proposed technique has been evaluated using various types of disturbances including load torque variations. Simulation results illustrate clearly the robustness of the controller and validity of the design technique for controlling the speed of permanent magnet motors.
Advanced dc-Traction-Motor Control System
Vittone, O.
1985-01-01
Motor-control concept for battery-powered vehicles includes stateof-the-art power-transistor switching and separate excitation of motor windings in traction and regenerative braking. Switching transistors and other components of power-conditioning subsystem operate under control of computer that coordinates traction, braking, and protective functions.
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.
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.
STEP RESPONS MOTOR DC MENGGUNAKAN METODA SINYAL KOMPRESI
Satrio Dewanto
2015-01-01
Output signal in the form of a step response of a DC motor can be obtained by providing the input signal to the motor in the form of a signal step directly. Step response obtained in this way usually contains a lot of noise. To reduce noise, this research was designed with the aim to get the step response using signal compression method in which the input signal is not a step but a signal with a specific shape given to the motor and if the output signal of the motor is compressed, it will obt...
Optimal brushless DC motor design using genetic algorithms
Rahideh, A.; Korakianitis, T.; Ruiz, P.; Keeble, T.; Rothman, M. T.
2010-11-01
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using a genetic algorithm. Characteristics of the motor are expressed as functions of motor geometries. The objective function is a combination of losses, volume and cost to be minimized simultaneously. Electrical and mechanical requirements (i.e. voltage, torque and speed) and other limitations (e.g. upper and lower limits of the motor geometries) are cast into constraints of the optimization problem. One sample case is used to illustrate the design and optimization technique.
Optimal brushless DC motor design using genetic algorithms
International Nuclear Information System (INIS)
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using a genetic algorithm. Characteristics of the motor are expressed as functions of motor geometries. The objective function is a combination of losses, volume and cost to be minimized simultaneously. Electrical and mechanical requirements (i.e. voltage, torque and speed) and other limitations (e.g. upper and lower limits of the motor geometries) are cast into constraints of the optimization problem. One sample case is used to illustrate the design and optimization technique.
Optimal brushless DC motor design using genetic algorithms
Energy Technology Data Exchange (ETDEWEB)
Rahideh, A. [Department of Engineering, Queen Mary, University of London, London E1 4NS (United Kingdom); Korakianitis, T., E-mail: korakianitis@alum.mit.ed [Department of Engineering, Queen Mary, University of London, London E1 4NS (United Kingdom); Ruiz, P. [Department of Engineering, Queen Mary, University of London, London E1 4NS (United Kingdom); Keeble, T.; Rothman, M.T. [Cardiac Research and Development, Barts and the London NHS Trust, The London Chest Hospital, London E2 9JX (United Kingdom)
2010-11-15
This paper presents a method for the optimal design of a slotless permanent magnet brushless DC (BLDC) motor with surface mounted magnets using a genetic algorithm. Characteristics of the motor are expressed as functions of motor geometries. The objective function is a combination of losses, volume and cost to be minimized simultaneously. Electrical and mechanical requirements (i.e. voltage, torque and speed) and other limitations (e.g. upper and lower limits of the motor geometries) are cast into constraints of the optimization problem. One sample case is used to illustrate the design and optimization technique.
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.
Fuzzy Logic Based Controller for Brushless DC Motor
Trinayani Chittajallu
2012-01-01
In this paper, a model of a three phase star – connected brushless direct current (BLDC) motor is presented. The state-space model for a BLDC motor is derived and is implemented using Matlab/Simulink. Torque and Speed control is applied using hysteresis band control and variable DC-link voltage control. The different control strategies are tested on the BLDC motor and their performance is evaluated. A Fuzzy Logic Controller(FLC) is also developed to control the torque and speed of BLDC motor ...
Energy Technology Data Exchange (ETDEWEB)
Jacob, D.
2005-07-01
This book proposes a presentation of AC electric motors essentially based on physics and technology. Its originality consists in avoiding to use mathematical formulations (like Park's transformation). The modeling retained, which only uses magnetic momentum, magnetic fields and reluctance concepts, leads simply and naturally to the vectorial control principle. The book develops some lecture elements which includes some topics rarely considered like the dimensioning of an asynchronous motor or of a single-phase brush-less motor. Experimental results illustrate the physical phenomena described and many original problems are resolved and commented at the end of each chapter. Content: signals and systems in electrotechnics, torque and rotating magnetic fields generation, asynchronous machine in permanent regime, speed variation of the asynchronous motor, special asynchronous motors, synchronous machine in permanent regime, brush-less motor, note about step motors, note about inverters, index. (J.S.)
Brushless DC Motor Speed Control Based on Emotional Intelligent Controller
Gholamreza ArabMarkadeh; Ehsan Drayabeigi
2014-01-01
This paper presents an emotional controller for brushless DC motor (BLDC) drive. The proposed controller is called brain emotional learning based intelligent controller (BELBIC). The utilization of the new controller is based on the emotion processing mechanism in brain. This intelligent control is inspired by the limbic system of mammalian brain, especially amygdala. The controller is successfully implemented in simulation using MATLAB software, brushless dc drive with trapezoidal back-emf. ...
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.
A Neuro-controller for DC Motor Containing Nonlinear Friction
Energy Technology Data Exchange (ETDEWEB)
Jang, Jun Oh; Jeon, Gi Joon [Kyung Pook National University (Korea, Republic of)
1998-01-01
This paper represents the application of a neuro-controller for compensating the effects of the friction in a DC motor system. A bound on the tracking error is derived from the analysis of the tracking error dynamics. The proposed neuro-controller is a combination of a linear controller and a neural network, and is trained by indirect learning scheme. The proposed neuro-controller is implemented and tested on an IBM PC - based DC motor system. The ideas, algorithm, simulation, and experiment results are described. Experimental results are shown to be superior to those of conventional control in terms of friction compensation. (author). 17 refs., 11 figs.
Rapid Control Prototyping Plataform for Didactic Plant Motor DC
Cristian Bazán-Orobio; Juan F. Flórez-Marulanda
2013-01-01
In this paper a design, implementation and validation of a Rapid Control Prototype platform for a plant based on a DC motor is proposed. This low-cost prototype provides of an electronic card (with a motor DC and sensors) manipulated by PC with free software tools using Linux, Scilab / Scicos and RTAI-Lab. This RCP System allows developing speed -position control trainings by using different types of PID industrial controllers with anti – wind up and bump less transfer schemes. We develop a s...
Advanced dc motor controller for battery-powered electric vehicles
Belsterling, C. A.
1981-01-01
A motor generation set is connected to run from the dc source and generate a voltage in the traction motor armature circuit that normally opposes the source voltage. The functional feasibility of the concept is demonstrated with tests on a Proof of Principle System. An analog computer simulation is developed, validated with the results of the tests, applied to predict the performance of a full scale Functional Model dc Controller. The results indicate high efficiencies over wide operating ranges and exceptional recovery of regenerated energy. The new machine integrates both motor and generator on a single two bearing shaft. The control strategy produces a controlled bidirectional plus or minus 48 volts dc output from the generator permitting full control of a 96 volt dc traction motor from a 48 volt battery, was designed to control a 20 hp traction motor. The controller weighs 63.5 kg (140 lb.) and has a peak efficiency of 90% in random driving modes and 96% during the SAE J 227a/D driving cycle.
Digital Signal Controller Based Digital Control of Brushless DC Motor
Directory of Open Access Journals (Sweden)
Anjana Elizabeth Thomas
2013-07-01
Full Text Available This paper presents the digital control of a brushless dc (BLDC motor using TMS320F2812 DSP controller and an EPROM. The real-time control of electrical motors is an application area that is not usually the domain of Digital Signal Processors. The TMS320F2812 has got dedicated modules for digital motor control. Control algorithms used for the control has been in TMS320F2812 DSP controller. The output of the driver is 6 independent PWM pulses that have to be given to the corresponding gates of the six MOSFETs power switches used in the three-phase bridge driving circuit whose output is given to the stator of the Brushless DC Motor. The commutation technique used in this work is the trapezoidal commutation owing to its excellent speed and current control and it has been implemented using an EPROM
Tuning PID controlling parameters for DC motor speed regulation
Stojanov, Done; Cveta MARTINOVSKA
2013-01-01
Modern robots are sophisticated and complex systems, composed of: sensors, high-speed processors and actuators. Different size DC electrical motors are used as actuators, converting electrical energy into mechanical movement. Without them, robots can’t perform movements, what is completely on the contrary on modern robotics concepts. Motor speed regulation is an important engineering task. Having appropriately tuned the controller, the desired speed is reached in a short time interval, with m...
Sensorless Passivity Based Control of a DC Motor
M.Seethamathavi; T.Vignesh
2015-01-01
In last couple of decades, the control of motors has increased drastically. With this increase, current control techniques are developed. In sensor-less passivity control of a DC Motor the term passivity means the property of stability in an input and output. To maintain the stability at the input side the solar pv panel is connected with MPPT which extract maximum and stable voltage. For output we simultaneously regulate, both, the output voltage of the SEPIC-converter t...
Simulation and performance of brushless DC motor actuators
Gerba, Alex
1985-01-01
The simulation model for a Brushless D.C. Motor and the associated commutation power conditioner transistor model are presented. The necessary conditions for maximum power output while operating at steady-state speed and sinusoidally distributed air-gap flux are developed. Comparisons of simulated model with the measured performance of a typical motor are done both on time response waveforms and on average performance characteristics. These preliminary results indicate good ...
Axial field permanent magnet DC motor with powder iron armature
Sharkh, Suleiman M.A.; Mohammad, Mohammad T.
2007-01-01
The paper describes a double-gap axial field permanent magnet (PM) dc motor whose double-layer armature wave winding is constructed of copper strips. It investigates the performance of two machines using powder iron and lamination steel materials as armature teeth. Tests are conducted to evaluate the motor torque and speed curves as well as their efficiency under different loads. Finite element analysis (FEA) and equivalent circuit models are used to determine the levels of the magnetic satur...
System of control of brushless DC motors using CPLD
Sivkov Stepan Igorevich; Novikov Leonid Grigorievich
2012-01-01
The developed system of control of brushless DC (BLDC) motors is realized on the complex pro-grammable logic device (CPLD). Using CPLD reduces the power consumption required for calculation the control vector and also the cost of the system. As opposed to the modern systems of control of BLDC motors, the given system uses only two Hall’s sensors. The control circuit is based on the operators of the logical signal convolution that significantly reduces power consumption during the formation of...
Power quality measurements of a DC motor drive
Energy Technology Data Exchange (ETDEWEB)
Mulakken, N. [Chevron Texaco, Richmond, CA (United States); Taufik [California Poly State Univ., San Luis Obispo, CA (United States). Dept. of Electrical Engineering; Anwari, M. [Univ. Teknologi Malaysia, Johor (Malaysia). Faculty of Electrical Engineering
2008-07-01
The DC motor converts electrical energy into mechanical energy. This paper presented power quality measurements for a DC drive. A laboratory setup consisting of a 5 hp DC drive connected to a load resistor bank was established to conduct the measurements. The purpose was to determine how various loading conditions on DC drives affect efficiency, input power factor to the DC drive and total harmonic distortion of output armature current of a DC drive. In conducting these measurements, 3 different loading conditions were examined while the output (armature) voltage of the DC drive was increased from about 25 per cent to 100 per cent. Two results were observed. Efficiency increased as the armature voltage increased and total input power factor decreased as the armature voltage increased. The result of total harmonic distortion measurements done on the armature current agreed with the expectation due to the increasing DC component of the armature voltage waveform. Both utilities and consumers will find the data from these measurements useful in terms of power quality by knowing how various operating conditions of a DC drive affect the power quality differently at both its input and output. 6 refs., 5 figs.
Life Prediction of DC Motor using Time Series Analysis based on Accelerated Degradation Testing
Directory of Open Access Journals (Sweden)
Li Wang
2013-12-01
Full Text Available This study presents a method of life prediction for DC motor using time series modeling procedure based on DC motor accelerated degradation testing data. DC motor accelerated degradation data are treated as time series and stochastic process are utilized to describe the degradation process for life prediction. An accelerated degradation test is processed for DC motor until they failed and the accelerated degradation data are collected for life prediction. A comparison between the predicted lifetime and the real lifetime of DC motors is processed and the results show that the life prediction of DC motors using time series analysis is effective.
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.
Digital Signal Controller Based Digital Control of Brushless DC Motor
Anjana Elizabeth Thomas; Salim Paul
2013-01-01
This paper presents the digital control of a brushless dc (BLDC) motor using TMS320F2812 DSP controller and an EPROM. The real-time control of electrical motors is an application area that is not usually the domain of Digital Signal Processors. The TMS320F2812 has got dedicated modules for digital motor control. Control algorithms used for the control has been in TMS320F2812 DSP controller. The output of the driver is 6 independent PWM pulses that have to be given to the corresponding gates o...
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.
Adaptive position controller for double armature brushless dc linear motor
Energy Technology Data Exchange (ETDEWEB)
Demirci, R. [Abant Izzet Baysal Univ., Technical Education Faculty, Electrical Dept., Dunez (Turkey); Dursun, M. [Gazi University, Technical Education Faculty, Electrical Dept., Ankara (Turkey)
2000-08-01
An adaptive position controller has been proposed for double armature brushless DC linear motor. The proposed position control system comprises an inner model reference adaptive velocity control loop and an outer position control loop. The parameters of the adaptive controller have been adjusted by using modified gradient type parameter adaptation algorithm. (orig.)
Pengendalian Kecepatan Putar Motor DC Sebagai Penggerak Alat Penghapus Whiteboard
Syam, Rafiuddin
2014-01-01
Menghapus whiteboard dengan cara manual memerlukan waktu yang dapat mengurangi keefisiensian waktu kegiatan belajar mengajar serta beresiko membuat tangan pengajar menjadi kotor. Untuk itu dibuat suatu alat mekanik yang dapat bekerja secara otomatis dan terprogram sehingga menggantikan tugas pengajar dalam menghapus tulisan di whiteboard. Pada penelitian ini alat penghapus whiteboard menggunakan dua buah motor DC dengan kapasitas 12 volt...
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...
Pengendali Kecepatan Motor Dc Menggunakan Sensor Hall Berbasis Mikrokontroler ATMega 8535
Sinaga, Roni
2013-01-01
Has designed a DC motor speed control device using sensor hall based microcontroller ATMega8535. Generally, this instrument consists of a dc motor, hall sensor, microcontroller and driver. This instrument is used to control dc motor speed rotary by setting the pulse width modulation (PWM) which provided, to maintain the stability of the motor even though the motor disorder of load changes. In general, the workings of these instruments is microcontroller will compare the motor rotation speed t...
Perbandingan Pengereman Motor DC Penguatan Seri Dengan Metode Dinamik Dan Plugging
Riko Euler Sitinjak
2009-01-01
Motor adalah mesin yang mengubah energi listrik menjadi energi mekanis. Pada motor arus searah (motor DC) energi listrik arus searah diubah menjadi energi mekanis. Konstruksi motor DC sangat mirip dengan generator DC. Kenyataannya mesin yang bekerja baik sebagai generator akan bekerja baik pula sebagai motor. Pada prinsipnya motor sangat membutuhkan proses penghentian putaran yang cepat, proses penghentian putaran ini disebut juga dengan pengereman. Ada beberapa macam metode yang diguna...
Controlo adaptativo de um motor DC
Ferreira, Luís Filipe Terra
2010-01-01
Produzir com qualidade superior a custos reduzidos com o objectivo de ocupar uma posi cão de destaque no mercado, implica uma ind ustria automatizada com equipamentos so sticados. Grande parte dos equipamentos industriais envolve motores que participam no processo de produ cão. Os equipamentos de produ cão têm cada vez mais de apresentar uma produ cão pr oxima da excelência que s o se consegue com algoritmos de controlo avan cados. A dinâmica dos processos de produ cão impli...
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.
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.
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....
Zulkarnain Lubis; A. N. Abdalla; Mortaza; Ruzlaini Ghon
2009-01-01
Problem statement: With emphasis on a cleaner environment and efficient operation, vehicles today rely more and more heavily on electrical power generation for success. Approach: Mathematical modeling the components of the HEV as the three phase induction motor couple to DC motor in hybrid electric vehicle was introduced. The controller of Induction Motor (IM) was designed based on input-output feedback linearization technique. It allowed greater electrical generation capacity and the fuel ec...
Energy Technology Data Exchange (ETDEWEB)
NONE
2000-03-01
In order to reduce production cost and increase production efficiency of compressor motors for air conditioners, development was made for the first time in the world on a production line for concentrated winding DC motors in which wires are wound directly on a stator core. Advantages of the concentrated winding motor are size reduction as a result of shortened coil end length, reduction in the amount of copper wire used, and enhancement in the efficiency. The gist in the technical points is as follows: (1) technology to form bobbin with thin wall to ensure insulation when winding; (2) semi-normal inner winding technology to wind wires from inside of the stator core; and (3) automatic coil end terminating technology. When compared to the conventional production line of inserter type motors, the capital investment was reduced by 1/3, installation space by 1/3, manpower by 18 workers, and motor cost by 16%. (translated by NEDO)
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.
Consideration on high-response of a linear DC motor
Energy Technology Data Exchange (ETDEWEB)
Yajima, H.; Wakiwaka, H.; Senoh, S. [Shinshu Univ., Wakasato, Nagano (Japan). Faculty of Engineering; Minegishi, K.; Fujiwara, N.; Tamura, K. [SMC Corp., Yawara, Tsukuba (Japan)
1997-09-01
In recent years, the motors for the factory automation need performance positioning with high speed and high accuracy. In this paper, a high response Linear DC Motor (LDM) is considered by two aspects. One is the movement of LDMs by the transfer function. The other is an impedance of the moving coil by measurement. The design indicators were led to high speed response from these considerations. They are reducing the inductance and enlarging the thrust constant. The validity of the design indicator is confirmed by designing and manufacturing LDM for a high-speed response. The measured settling time of the indicial response is 80 milli seconds.
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
Energy Technology Data Exchange (ETDEWEB)
NONE
2000-01-10
For use in household use inverters, Fuji Electric has developed a brushless DC motor using a new main circuit system to attempt reducing the number of semiconductor elements in the inverter section. The figure shows the main circuitry composed of four semiconductor elements in the inverter section. This circuit is characterized in that the third phase of the motor is outputted from the neutral point potential in the DC intermediate circuit, realizing improved efficiency because of reduction in the number of semiconductor elements. Furthermore, the system is capable of realizing the PAM controlled operation from an operation zone with lower speed than in conventional ordinary inverter systems using six semiconductor elements. Thus, switching loss can be reduced in the inverter section during low speed operation of the brushless DC motor, and carrier loss in the motor can also be reduced. From the results of the Fuji Electric's experiments, an overall efficiency is now improved higher by up to about 25% than the conventional system. (translated by NEDO)
APPLICATION OF MODIFIED REPETITIVE CONTROL STRATEGY FOR A DC MOTOR
Directory of Open Access Journals (Sweden)
M.VIJAYAKARTHICK
2011-07-01
Full Text Available In this work, design and implementation of Modified Repetitive Control Strategy (MRCS for a DC Motor System is proposed. MRCS developed by Hara et.al, is considered as a base in this study. Key factors such as Learning filter (L and Robustness filter (Q in the learning control strategy are identified using Zero Phase Error Tracking Control (ZPETC technique and frequency method respectively. Design and implementation of the MRCS approach involves the approximation of First Order process (FOP that includes ZNTR based PControl settings and sine wave generation. Simulation runs of the DC Motor System are carried out for the periodic reference tracking with MRCS based P mode control loop. A similar test run with Repetitive Control Strategy (RCS based P mode and conventional P-mode are carried out for comparison purpose. Results confirm the supremacy of MRCS based P mode control loop. A robustness of the MRCS is also analyzed.
Rapid Control Prototyping Plataform for Didactic Plant Motor DC
Directory of Open Access Journals (Sweden)
Cristian Bazán-Orobio
2013-06-01
Full Text Available In this paper a design, implementation and validation of a Rapid Control Prototype platform for a plant based on a DC motor is proposed. This low-cost prototype provides of an electronic card (with a motor DC and sensors manipulated by PC with free software tools using Linux, Scilab / Scicos and RTAI-Lab. This RCP System allows developing speed -position control trainings by using different types of PID industrial controllers with anti – wind up and bump less transfer schemes. We develop a speed control application structured in four steps: identification, controller design, simulation and real time control, where there are pedagogical advantages of a platform that not only allows simulation but also real-time control of a plant.
Algebraic parameters identification of DC motors: methodology and analysis
Becedas, J.; Mamani, G.; Feliu, V.
2010-10-01
A fast, non-asymptotic, algebraic parameter identification method is applied to an uncertain DC motor to estimate the uncertain parameters: viscous friction coefficient and inertia. In this work, the methodology is developed and analysed, its convergence, a comparative study between the traditional recursive least square method and the algebraic identification method is carried out, and an analysis of the estimator in a noisy system is presented. Computer simulations were carried out to validate the suitability of the identification algorithm.
Modeling of subharmonics and chaos in DC motor drives
Chau, KT; Chen, JH; Chan, CC; Chan, David TW
1997-01-01
In this paper, the nonlinear dynamics of both voltage-mode and current-mode controlled dc motor drive systems are presented. The investigation is based on the derivation of the discrete mappings that describe their system subharmonics and chaos in the continuous conduction mode of operation. It illustrates that different bifurcation diagrams can be obtained by using different modes of control while varying the same system parameters. A unified modeling approach for the period-1 and hence the ...
APPLICATION OF MODIFIED REPETITIVE CONTROL STRATEGY FOR A DC MOTOR
M.VIJAYAKARTHICK; S. Sathishbabu; Bhaba, P. K.; S.N.SIVARAJ
2011-01-01
In this work, design and implementation of Modified Repetitive Control Strategy (MRCS) for a DC Motor System is proposed. MRCS developed by Hara et.al, is considered as a base in this study. Key factors such as Learning filter (L) and Robustness filter (Q) in the learning control strategy are identified using Zero Phase Error Tracking Control (ZPETC) technique and frequency method respectively. Design and implementation of the MRCS approach involves the approximation of First Order process (F...
Performance of Networked DC Motor with Fuzzy Logic Controller
B. Sharmila; N. Devarajan
2010-01-01
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 traf...
A STUDY OF DC PERMANENT MAGNET MOTOR NOISE RELATED TO LINE CURRENT
Suriano, Candace Rogers
1994-01-01
Lightweight, compact and inexpensive DC permanent magnet motors are well suited for low cost high production use in industry. Unfortunately, the audible noise emanating from these motors can cause a false negative perception of the motor's quality. In cars, for example, fan motor noise can be a nuisance. The objective of this thesis is to examine the connection between motor noise and the line current wave form for a specific four pole DC permanent magnet motor. It is further concerned with i...
Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
R. Saranya, S. Saravana kumar,R. Baskaran, A. Vinidha Roc, K. Sathiyasekar
2014-01-01
The Brushless Direct Current (BLDC) motors are one of the motor types that is gaining rapid popularity. Its major appliances include refrigerators, washing machines, vacuum cleaners, freezers, etc. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. This paper proposes a new optimized technique for the Sensorless operation of permanent magnet brushless direct current (BLDC) motor, which is based on b...
Disc rotors with permanent magnets for brushless DC motor
Hawsey, Robert A.; Bailey, J. Milton
1992-01-01
A brushless dc permanent magnet motor drives an autonomous underwater vehe. In one embodiment, the motor comprises four substantially flat stators in stacked relationship, with pairs of the stators axially spaced, each of the stators comprising a tape-wound stator coil, and first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and a drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore in which the first shaft is disposed. Two different sets of bearings support the first and second shafts. In another embodiment, the motor comprises two ironless stators and pairs of rotors mounted on opposite sides of the stators and driven by counterrotating shafts.
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)
Speed Control Analysis of Brushless DC Motor Based on Maximum Amplitude DC Current Feedback
Hassan M.A.A.; Abdullah A.R.; Bahari N.
2014-01-01
This paper describes an approach to develop accurate and simple current controlled modulation technique for brushless DC (BLDC) motor drive. The approach is applied to control phase current based on generation of quasi-square wave current by using only one current controller for the three phases. Unlike the vector control method which is complicated to be implemented, this simple current modulation technique presents advantages such as phase currents are kept in balance and the current is con...
On-line Identification of the DC motor Parameters by using Least Mean Square Recursive Method
Directory of Open Access Journals (Sweden)
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.
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.)
Energy Technology Data Exchange (ETDEWEB)
NONE
2000-03-01
A DC motor based on the first concentrated winding system in the world that is used as an air-conditioning compressor was employed to spread an energy-saving household air conditioner. Moreover, a high-efficiency compressor corresponding to HFC (new coolant that does not destroy an ozone layer) was developed. This motor is directly wound to the teeth of a stator core as compared with the conventional distributed winding system. In this system, the amount of the electric wire used can be reduced about 35%. As a result, a high-efficiency, compact, lightweight, and low-cost motor was obtained. This rotary compressor is not only installed in our company's air conditioner 'Daiseikai' in the refrigeration year of 2000, but also externally sold to the other air conditioner manufacturers. It will aim at the de facto standards in the world. (translated by NEDO)
IE Information No. 87-08: Degraded motor leads in Limitorque dc motor operators
International Nuclear Information System (INIS)
On May 6, 1986 the NRC received from Portland General Electric Company a 10 CFR 21 report concerning a motor failure which occurred at its Trojan Nuclear Power Plant. The failure involved shorting of the motor leads inside a Limitorque motor operator connected to an auxiliary feedwater flow control valve. Upon inspection it was determined that the failure was the result of insulation degradation of the motor leads that had allowed two leads to short together. Recently, the NRC has also learned of a failure at the Turkey Point Nuclear Power Plant in which the steam supply valve for the auxiliary feedwater turbine failed to operate after a Limitorque motor operator experienced a similar motor lead short circuit. The Trojan and the Turkey Point Limitorque operators were found to contain motors manufactured with Nomex-Kapton insulated leads. On January 12--14, 1987, the NRC conducted an inspection at Peerless-Winsmith, Inc., manufacturer of dc motors for Limitorque Co. During this inspection it was determined that the failed Nomex-Kapton leads were different than the leads which were fitted to the motors, tested, and documented in Limitorque Qualification Report B-0009 for dc motor operators. The leads attached to the tested motors were insulated with Nomex plus an epoxy impregnated braided fiberglass sleeve. The NRC knows of no analysis or testing that has been performed to show the Nomex-Kapton leads are acceptable for use in an application requiring environmental qualification. Further, it should be noted that the failures cited above occurred under normal operating conditions, not under the harsh conditions which could occur in areas where environmental qualification is required
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.
Energy Technology Data Exchange (ETDEWEB)
Zeiff, Andreas; Homburg, Dietrich
2009-01-15
Electronics is the key technology in control engineering, but even the best control system requires reliable modules to transmit signals. Modern electric motors have become indispensable here. There are nearly as many motor types as there are applications. Electromagnetic conversion of electric into mechanical power is directly related to motor design. There are AC and DC motors, one-speed motors and variable-speed motors. Rotary momentum and synchronisation can be optimized by selecting the appropriate motor type, as can dynamics and detent torque. Correct selection of the electric motor therefore is essential for an optimal drive concept. (orig.)
Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
Directory of Open Access Journals (Sweden)
R. Saranya, S. Saravana kumar,R. Baskaran, A. Vinidha Roc, K. Sathiyasekar
2014-04-01
Full Text Available The Brushless Direct Current (BLDC motors are one of the motor types that is gaining rapid popularity. Its major appliances include refrigerators, washing machines, vacuum cleaners, freezers, etc. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. This paper proposes a new optimized technique for the Sensorless operation of permanent magnet brushless direct current (BLDC motor, which is based on back Electro Motive Force (back EMF, Zero Crossing Detection (ZCD. This proposed commutation technique of BLDC motor significantly reduces sensing circuits and cost of motor drive.
Power conditioning for large dc motors for space flight applications
Veatch, Martin S.; Anderson, Paul M.; Eason, Douglas J.; Landis, David M.
1988-01-01
The design and performance of a prototype power-conditioning system for use with large brushless dc motors on NASA space missions are discussed in detail and illustrated with extensive diagrams, drawings, and graphs. The 5-kW 8-phase parallel module evaluated here would be suitable for use in the Space Shuttle Orbiter cargo bay. A current-balancing magnetic assembly with low distributed inductance permits high-speed current switching from a low-voltage bus as well as current balancing between parallel MOSFETs.
Modeling and Implementation for Embedded DC Motor Ethernet Control System
Zhu, Lingbo; Dai, Guanzhong; Shi, Li; Lin-Shi, Xuefang; Rétif, Jean-Marie
2008-01-01
In this paper, a model of Embedded DC Motor Ethernet Control System is proposed with analysis on transmission time delay and data packet dropout. Based on this model, the ECS is described as a two-state asynchronous dynamical system with output feedback control and then implemented on a platform which uses a PC as a central controller and an ARM9 kit as a remote controller. As a key part of developments, embedded programs including client program and Linux Module are realized on the kit. The ...
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.
Signal differentiation in position tracking control of dc motors
International Nuclear Information System (INIS)
An asymptotic differentiation approach with respect to time is used for on-line estimation of velocity and acceleration signals in controlled dc motors. The attractive feature of this differentiator of signals is that it does not require any system mathematical model, which allows its use in engineering systems that require the signal differentiation for its control, identification, fault detection, among other applications. Moreover, it is shown that the differentiation approach can be applied for output signals showing a chaotic behavior. In addition a differential flatness control scheme with additional integral compensation of the output error is proposed for tracking tasks of position reference trajectories for direct current electric motors using angular position measurements only
A new surface-inset, permanent-magnet, brushless dc motor drive for electric vehicles
J. Gan; Chau, KT; Chan, CC; Jiang, JZ
2000-01-01
A new five-phase, surface-inset, permanent-magnet (PM), brushless dc motor drive is proposed in this paper. The motor drive has advantages of both the PM brushless dc motor drive and the dc series motor drive. The originlity is that the air-gap flux of the motor is generated by both the PM excitation and the specially controlled stator currents (two particular phases) under the same PM pole. The motor configuration and principle of operation are so unusual that the magnetic field distribution...
Sensorless Passivity Based Control of a DC Motor
Directory of Open Access Journals (Sweden)
M.Seethamathavi
2015-02-01
Full Text Available In last couple of decades, the control of motors has increased drastically. With this increase, current control techniques are developed. In sensor-less passivity control of a DC Motor the term passivity means the property of stability in an input and output. To maintain the stability at the input side the solar pv panel is connected with MPPT which extract maximum and stable voltage. For output we simultaneously regulate, both, the output voltage of the SEPIC-converter to a value larger than the solar panel output voltage, and the speed of motor, in any of the turning senses, so that it tracks a prespecified constant reference. For a sensor less current control of a PMDC motor, its small-signal model that contains a number of parasitic parameters the observed current may diverge due to the parasitic resistors and the forward conduction voltage of the diode. Moreover, the divergence of the observed current will cause steady state errors in the output voltage a self-correction differential current observer (SDCO is proposed to eliminate this steady-state error and gain high transient response speed. By carrying out a series of MATLAB simulation verifications, further investigation proves that the proposed algorithm has good robustness.
Electric vehicle motors and controllers
Secunde, R. R.
1981-01-01
Improved and advanced components being developed include electronically commutated permanent magnet motors of both drum and disk configuration, an unconventional brush commutated motor, and ac induction motors and various controllers. Test results on developmental motors, controllers, and combinations thereof indicate that efficiencies of 90% and higher for individual components, and 80% to 90% for motor/controller combinations can be obtained at rated power. The simplicity of the developmental motors and the potential for ultimately low cost electronics indicate that one or more of these approaches to electric vehicle propulsion may eventually displace presently used controllers and brush commutated dc motors.
Controlling DC Motor using Microcontroller (PIC16F72) with PWM
Shruti Shrivastava1 , Jageshwar Rawat2 , Amit Agrawal3
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...
Controlling DC Motor using Microcontroller (PIC16F72 with PWM
Directory of Open Access Journals (Sweden)
Shruti Shrivastava, Jageshwar Rawat, Amit Agrawal
2012-12-01
Full Text Available 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. Togenerate PWM signals we use PIC16F72 microcontroller.
Speed Control of DC Motor under Varying Load Using PID Controller
Muhammad Rafay Khan; Aleem Ahmed Khan; Umer Ghazali
2015-01-01
DC motors are used extensively in industrial variable speed applications because of most demanding speed-torque characteristics and are simple in controlling aspects. This paper presents a DC motor speed controlling technique under varying load condition. The linear system model of separately excited DC motor with Torque-variation is designed using PID controller. A Matlab simulation of proposed system with no-Load and full-load condition is performed on Simulink platform to observe the syste...
Robust control of synchronous motors through AC/DC/AC converters
El Magri, Abdelmounime; Giri, Fouad; Abouloifa, Abdelmajid; Chaoui, Fatima Zara
2010-01-01
The problem of controlling synchronous motors, driven through AC/DC rectifiers and DC/AC inverters is addressed. The control objectives are three fold: (i) forcing the motor speed to track a varying reference signal in presence of motor parameter uncertainties;(ii) regulating the DC Link voltage; (iii )assuring a satisfactory power factor correction (PFC) with respect to the power supply net .First, a nonlinear model of the whole controlled system is developed in the Park-coordinates. Then, a...
A DC brushless PM motor driven photovoltaic water pumping system
Energy Technology Data Exchange (ETDEWEB)
Yu, Shijie; Xie, Lei; He, Huiruo; Zhang, Hualin; Zhou, Longhua; Liu, Wen [Sun Yat-sen Univ., Zhuhai (China). Inst. of Power Electronics and Control Technology
2008-07-01
Along with the worldwide more attention to environment and rapid development of photovoltaic industry, the PV water pumping system has rapidly developed, the economic advantage of which brings it into prominence. It was estimated, up to now the operating PV water pumping systems in the world may exceed hundreds thousand sets and with a driving increasing tendency. In many cases the distributed stations gain the advantages over PV feed-in grid-connected pump. The majority of the PV pumping systems are driven by an ac asynchronous motor, which are generally of lower efficiency, especially for small-scale systems. A dc permanent magnetic, brushless, sensorless and casting resin motor are developed and used in PV water pumping systems, the experiments and operations of 19 demonstrative stations in Guangdong show that the results on economics and reliability are excited. It can save even 15% {proportional_to} 20% PV modules in comparison with an asynchronous motor driven under same sunshine, water head and flow. An example of comparison between systems with batteries and without batteries is also given in this paper. Finally the commercialization, marketing and subsidy policies of PV water pumping system in China are discussed. (orig.)
Graphical User Interface Aided Online Fault Diagnosis of Electric Motor - DC motor case study
POSTALCIOGLU OZGEN, S.
2009-01-01
This paper contains graphical user interface (GUI) aided online fault diagnosis for DC motor. The aim of the research is to prevent system faults. Online fault diagnosis has been studied. Design of fault diagnosis has two main levels: Level 1 comprises a traditional control loop; Level 2 contains knowledge based fault diagnosis. Fault diagnosis technique contains feature extraction module, feature cluster module and fault decision module. Wavelet analysis has been used for the feature extract...
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.
M.Muruganandam; I.Thangaraju; Madheswaran, M.
2014-01-01
In this article, the speed of the DC motor is controlled by Hybrid Fuzzy-Neuro controller (FNC). The Hybrid Fuzzy-Neuro controller is designed and tested for different types of DC motors like DC separately excited motor and DC series motor. The motor is fed by DC-DC buck converter (DC chopper). The system has two loops of inner current controller loop and outer Fuzzy-Neuro based speed controller loop. The speed controller gives the duty cycle to generate the PWM signal for the control of chop...
Smoother thrust on multi-polar type linear DC motor
Energy Technology Data Exchange (ETDEWEB)
Wakiwaka, H.; Senoh, S.; Yajima, H; Yamada, H. [Shinshu Univ., Wakasato, Nagano (Japan). Faculty of Engineering; Oda, J. [Ohkura Electric Co., Ltd., Shirako, Wakou (Japan)
1997-09-01
A LDM has the merits of a high response and a direct linear motion. Therefore, a LDM is used widely in the fields of Factory Automation (FA). As compared with a mono-polar type Linear DC Motor (LDM), it is possible for a multi-polar type LDM to have a longer stroke and more thrust with thin shape. However, there are thrust ripple on multi-polar type one. In this paper, a design to prevent thrust ripple is discussed. In order to make a smoother thrust on multi-polar type LDM, the structure of the LDM is set as a 2-phase coil type. This paper clarifies that the thrust ripple of the LDM has the minimum value of 1.68%, the pole pitch of 15 mm, the coil width of 12 mm and the permanent magnet width of 10 mm.
Dual-mode operation of DC-excited memory motors under flux regulation
Yu, C.; Chau, KT
2011-01-01
The concept of memory is due to the fact that the magnetization level of permanent magnets (PMs) in the motor can be easily regulated by a temporary dc current pulse and then be memorized automatically. By incorporating this concept into the hybrid-field doubly salient PM (DSPM) motor, the resulting dc-excited memory motor can offer effective and efficient air-gap flux control. The purpose of this paper is to newly propose and implement dual-mode operation for the dc-excited memory motor. Nam...
Modeling and Simulation of Sensorless Speed Control of a Buck Converter Controlled Dc Motor
Directory of Open Access Journals (Sweden)
Tagreed M. Ali
2010-01-01
Full Text Available This paper investigate a sensorless speed control of a separately excited dc motor fed from a buck type dc-dc converter. The control system is designed in digital technique by using a two dimension look-up table. The performance of the drive system was evaluated by digital simulation using Simulink toolbox of Matlab.
Modeling and Simulation of Sensorless Speed Control of a Buck Converter Controlled Dc Motor
Tagreed M. Ali; Bassim M. H. Jassim
2010-01-01
This paper investigate a sensorless speed control of a separately excited dc motor fed from a buck type dc-dc converter. The control system is designed in digital technique by using a two dimension look-up table. The performance of the drive system was evaluated by digital simulation using Simulink toolbox of Matlab.
Large-signal analysis of DC motor drive system using state-space averaging technique
Energy Technology Data Exchange (ETDEWEB)
Bekir Yildiz, Ali [University of Kocaeli, Engineering Faculty, Electrical Engineering Department, Vinsan Kampus, 41001 Kocaeli (Turkey)
2008-11-15
The analysis of a separately excited DC motor driven by DC-DC converter is realized by using state-space averaging technique. Firstly, a general and unified large-signal averaged circuit model for DC-DC converters is given. The method converts power electronic systems, which are periodic time-variant because of their switching operation, to unified and time independent systems. Using the averaged circuit model enables us to combine the different topologies of converters. Thus, all analysis and design processes about DC motor can be easily realized by using the unified averaged model which is valid during whole period. Some large-signal variations such as speed and current relating to DC motor, steady-state analysis, large-signal and small-signal transfer functions are easily obtained by using the averaged circuit model. (author)
Adaptive Nonlinear Control of Induction Motors through AC/DC/AC Converters
Elfadili, Abderrahim; Giri, Fouad; El Magri, Abdelmounime; Dugard, Luc; Chaoui, Fatima Zara
2012-01-01
The problem of controlling induction motors, together with associated AC/DC rectifiers and DC/AC inverters, is addressed. The control objectives are threefold: (i) the motor speed should track any reference signal despite mechanical parameter uncertainties and variations; (ii) the DC Link voltage must be tightly regulated; (iii) the power factor correction (PFC) w.r.t. the power supply net must be performed in a satisfactory way. First, a nonlinear model of the whole controlled system is deve...
PID control of brushless DC motor and robot trajectory planning simulation with MATLAB®/SIMULINK®
Oguntoyinbo, Oludayo
2009-01-01
This report presents a PID model of a brushless dc (BLDC) motor and a robot trajectory planning and simulation. A short description of the brushless dc motor is given. For this work, mathematical models were developed and subsequently used in getting the simulation parameters. The PID model is accomplished with the use of MATLAB®/SIMULINK®. The operational parameters of the specific BLDC motor were modelled using the tuning methods which are used to develop subsequent simulations. The best PI...
Tuning of PID Controller for A Linear Brushless DC Motor using Swarm Intelligence Technique
Pooja Sharma; Rajeev Gupta
2014-01-01
An Optimal Design of PID Controller is proposed in this paper. The Methodology of PSO Algorithm is utilized to search the optimal parameters of Proportional Integral Derivative (PID) Controller for BLDC Motor. PSO is an Evolutionary Optimization Technique. A Linear Brushless DC Motors are known for higher efficiency and lower maintenance. The Brushless DC Motor is modeled in Simulink & tuning of PID controller using PSO is implemented in MATLAB. This Method was more efficient ...
Modeling and Analysis of PI Controller Based Speed Control of Brushless DC Motor Drive.
Mr.P.Nagasekhar Reddy
2013-01-01
The Brushless DC motors (BLDC) find widespread applications in domestic and industries due to their low and high power density and ease of speed control. To accomplish desired level of performance the motor requires suitable speed controllers. In case of permanent magnet Brushless DC motors, usually control of speed is reached by using proportional integral (PI) controller. Although the conventional PI controllers are widely used in the industry due to their simple control structure and ease ...
Tuning of PID Controller for A Linear Brushless DC Motor using Swarm Intelligence Technique
Directory of Open Access Journals (Sweden)
Pooja Sharma,
2014-05-01
Full Text Available An Optimal Design of PID Controller is proposed in this paper. The Methodology of PSO Algorithm is utilized to search the optimal parameters of Proportional Integral Derivative (PID Controller for BLDC Motor. PSO is an Evolutionary Optimization Technique. A Linear Brushless DC Motors are known for higher efficiency and lower maintenance. The Brushless DC Motor is modeled in Simulink & tuning of PID controller using PSO is implemented in MATLAB. This Method was more efficient for Step Response Characteristics.
Modelling and Simulation Analysis of the Brushless DC Motor by using MATLAB
Prasad, G.; N.Sree Ramya,; P.V.N. Prasad; G.Tulasi Ram Das,
2012-01-01
The paper presents a model of three phase star connected brushless dc motor considering the behaviour of motor during commutation. This process is done in MATLAB/ SIMULINK after development of the BLDC motor with sinusoidal and trapezoidal waveforms of back-EMF. A comparision study is presented between the MATLAB/ SIMULINK models of sinusoidal and trapezoidal models of back-EMF.
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.
1980-01-01
A discrete time model for simulation of the dynamics of samarium cobalt-type permanent magnet brushless dc machines is presented. The simulation model includes modeling of the interaction between these machines and their attached power conditioners. These are transistorized conditioner units. This model is part of an overall discrete-time analysis of the dynamic performance of electromechanical actuators, which was conducted as part of prototype development of such actuators studied and built for NASA-Johnson Space Center as a prospective alternative to hydraulic actuators presently used in shuttle orbiter applications. The resulting numerical simulations of the various machine and power conditioner current and voltage waveforms gave excellent correlation to the actual waveforms collected from actual hardware experimental testing. These results, numerical and experimental, are presented here for machine motoring, regeneration and dynamic braking modes. Application of the resulting model to the determination of machine current and torque profiles during closed-loop actuator operation were also analyzed and the results are given here. These results are given in light of an overall view of the actuator system components. The applicability of this method of analysis to design optimization and trouble-shooting in such prototype development is also discussed in light of the results at hand.
Modeling and Analysis of PI Controller Based Speed Control of Brushless DC Motor Drive.
Directory of Open Access Journals (Sweden)
Mr.P.Nagasekhar Reddy
2013-09-01
Full Text Available The Brushless DC motors (BLDC find widespread applications in domestic and industries due to their low and high power density and ease of speed control. To accomplish desired level of performance the motor requires suitable speed controllers. In case of permanent magnet Brushless DC motors, usually control of speed is reached by using proportional integral (PI controller. Although the conventional PI controllers are widely used in the industry due to their simple control structure and ease of implementation, these controllers pose difficulties where there are some control complexity such as nonlinearity, load disturbances and parametric variations. Moreover PI controllers require precise linear mathematical models. In this paper, the analysis and mathematical modeling of BLDC motor is implemented. Also, speed control of three phase BLDC motor drive using power electronic device is projected by using matlab/Simulink. The simulation result shows the improved performance of developed Brushless DC motor drive.
Torque prediction using the flux-MMF diagram in AC, DC, and reluctance motors
Staton, D.A.; Deodhar, R.P.; Soong, W.L.; Miller, T.J.E.
1996-01-01
This paper uses the flux-MMF diagram to compare and contrast the torque production mechanism in seven common types of electric motor. The flux-MMF diagram is a generalized version of the flux-linkage versus current (ψ-i) diagram for switched-reluctance motors. It is illustrated for switched-reluctance, synchronous-reluctance, induction, brushless AC, brushless DC, interior PM and commutator motors. The calculated flux-MMF diagrams for motors with the same electromagnetic volume, airgap, slotf...
Robust Speed Control of DC Servo Motor Using PID-Neural Network Hybrid Controller
Energy Technology Data Exchange (ETDEWEB)
Park, Wal Seo; Jeon, Jeong Chay [Wonkwang University (Korea, Republic of)
1998-02-01
Robust control for DC servo motor is needed according to the highest precision of industrial automation. However, when a motor control system with PID controller has an effect of load disturbance, it is very difficult to guarantee the robustness of control system. As a compensation method solving this problem, in this paper, PID-neural network hybrid control method for motor control system is presented. The output of neural network controller is determined by error and rate of error change occurring in load disturbance. The robust control of DC servo motor using neural network controller is demonstrated by computer simulation. (author). 6 refs., 5 figs.
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.
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.
Basic development of one-chip control circuitry for commutatorless dc motors
Nutz, K. D.; Stromski, R.
1984-12-01
A monolithic one chip circuitry including the detection of rotor speed control and the direct load current drive of dc-motors with an electronic commutation was developed because of the increased efficiency of commutatorless dc-motors in which high-quality magnetic materials were used. The hardware demonstration of Hall-Sensor-elements in a power compatible technology was successful. A design based on the data is shown.
Neuro-Fuzzy DC Motor Speed Control Using Particle Swarm Optimization
Boumediene ALLAOUA; Abdellah LAOUFI; Gasbaoui, Brahim; Abdessalam ABDERRAHMANI
2009-01-01
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,...
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.
Stability analysis of time-delayed DC motor speed control system
Ayasun, Saffet
2013-01-01
In this paper, the stability of time-delayed DC motor speed control systems is analyzed. The measurement devices and communication links used by networked control systems, cause a significant amount of time delays. The stability boundary of the system in terms of the time delay is theoretically determined and an expression is obtained to compute the delay margin in terms of system parameters. The delay margin is defined as the maximum amount of time delay for which the DC motor spee...
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.
Chaos synchronization and parameter identification of three time scales brushless DC motor system
Energy Technology Data Exchange (ETDEWEB)
Ge, Z.-M. [Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan (China)]. E-mail: zmg@cc.nctu.edu.tw; Cheng, J.-W. [Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan (China)
2005-04-01
Chaotic anticontrol and chaos synchronization of brushless DC motor system are studied in this paper. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. Then, chaos synchronization of two identical systems via additional inputs and Lyapunov stability theory are studied. And further, the parameter of the system is traced via adaptive control and random optimization method.
Multi-input Fuzzy Logic Controller for Brushless dc Motor Drives
Y. H. Bharathi; B. R. Rekha; P. Bhaskar Bhaskar; C. S. Parvathi; Kulkarni, A.B.
2008-01-01
The brushless dc motors are used in various applications such as defence, industries,robotics, etc. In these applications, the motor should be precisely controlled to give the desiredperformance. The proposed controller systems consist of multi-input fuzzy (two-and three-input)logic controller (FLC) and multi-input integrated fuzzy logic controller (IFLC) for the speed controlof brushless dc servomotor drive. The input for the controllers are error e(k), change in error[first derivative of er...
Simulation Study on Brushless DC Motor Based on Fuzzy-PI Control
Jinli Lei
2011-01-01
Brushless DC motor ( BLDCM ) is a variable, strong coupling, nonlinear system, the simulation model is hard to be established. To solve this problem, based on the principle and structure of the brushless DC motor (BLDCM), and analyzing the mathematic mode, a simulation model of BLDCM control system is established in Matlab/Simulink by the modular design, and the fuzzy PI control algorithm of prototype is designed. The simulation results show that the fuzzy-PI control speeds up response time, ...
DC Motor Speed and Position Control System Connects Directly to Microcomputer Chips
Albert Zsolt Barabas; Alexandru Morar
2011-01-01
The papers presents a high performance speed and position control system for separately-excited D.C. motor, which was designed and performed with a dedicated integrated circuits (L290, L291, L292), made by SGS-THOMSON Microelectronics Company. The L290, L291 and L292 together form a complete microprocessorcontrolled (microcomputer chips) DC motor servo positioning system that is both fast and accurate with an adequate software . The papers presents a description of the system, detailed functi...
Field-Weakening Nonlinear Control of a Separately Excited DC Motor
Mohamed Zribi; Adel Al-Zamel
2007-01-01
This paper investigates the design and implementation of nonlinear control schemes for a separately excited DC motor operating in the field-weakening region. A feedback linearization controller, a Corless-Leitman-type controller, and two nonlinear controllers are designed and implemented for a DC motor system. The stability of the closed-loop system is proved using Lyapunov theory. A hardware testbed is constructed to experimentally verify the designed controllers. The hardware consists of a ...
Chaos synchronization and parameter identification of three time scales brushless DC motor system
International Nuclear Information System (INIS)
Chaotic anticontrol and chaos synchronization of brushless DC motor system are studied in this paper. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. Then, chaos synchronization of two identical systems via additional inputs and Lyapunov stability theory are studied. And further, the parameter of the system is traced via adaptive control and random optimization method
Research of Compound Control for DC Motor System Based on Global Sliding Mode Disturbance Observer
2014-01-01
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...
Controlling a Brushless DC Motor in a Shift-by-Wire System
Wiberg, Johan
2003-01-01
Shift-by-Wire is about replacing the mechanical link between the automatic transmission and the shift lever with an electromechanical system. This will make new safety functions possible and assist the driver in other ways. To do this, an actuator with a brushless DC motor is built into the transmission. It controls the position of the shift valve, which decides the driving position. This thesis concerns the controlling of the brushless DC motor. This is done by programming a shift control ...
Ahmed M. Kassem; Ali Mohamed Yousef
2012-01-01
A position control of DC motor servo drive based on the Sliding Mode (SM) approach is presented. The modeling and analysis of the servo DC motor are obtained. The Sliding Mode Controller (SMC) design changes such that its performance is substantially improved. To improve the controller performance in steady stat (zero error) the Integral Sliding Mode Controller (ISMC) is used. Since the main drawback of SMC is a phenomenon, the so-called chattering, resulting from discontinuous controllers. A...
B. Tamilselvi; S. Mumtaj
2013-01-01
Brushless DC Motor have used in various sectors like aerospace, manufacturing and home machines owing to its trouble-free construction. The exact information of the rotor position is necessary for better performance of brushless DC motors the need for the rotor angle information in BLDC has been fulfilled by make use of some form of rotor position sensor. In BLDC drives the position sensor contains drawbacks of high cost, electrical connections, mechanical position problems and disadvantage o...
Online Performance Optimization of a DC Motor Driving a Variable Pitch Propeller
Cohen, Raphael; Miculescu, David; Reilley, Kevin; Pakmehr, Mehrdad; Feron, Eric
2013-01-01
A practical online optimization scheme is developed for performance optimization of an electrical aircraft propulsion system. The goal is to minimize the power extraction of the propulsion system for any given thrust value. The online optimizer computes the optimum pitch angle of a variable pitch propeller by minimizing the power of the system for a command thrust value. This algorithm is tested on a DC motor driving a variable pitch propeller; the experimental hardware setup of the DC motor ...
A sample speed control technique and pulsating torque elimination method in a brush less D C motor
International Nuclear Information System (INIS)
This paper presents a theoretical derivation and computer simulation of an optimal speed controller for a barrelhouse dc motor using feedback from a linear model running in parallel with the inverter-fed model. The intent of the feedback from the linear model is to eliminate torque ripples from the inverter drive. A nonlinear model of such a motor, transformed into a linear model by a local dipheomorphism (defined in section 2) and a new model is introduced in order to eliminate the undesirable effects of the inverter harmonics
Constant-frequency multi-resonant converter-fed DC motor drives
Chau, KT; Ching, TW; Chan, CC
1996-01-01
Low-inductance dc motors with high power density and low rotor inertia are becoming more attractive, particularly for servo applications. In order to maintain their current ripples within acceptable levels, power converters need to operate at high switching frequencies. However, the increase in switching frequencies realizable by hard-switching techniques accompanies the increase in switching losses and switching stresses. In this paper, recent soft-switching dc-dc converters are discussed fo...
Urushihara, Shiro; Kamano, Takuya; Yura, Satoshi; Yasuno, Takashi; Suzuki, Takayuki
One of fundamental problems in the factory automation is how to obtain linear motion. Linear motors produce directly the linear motion force without a motion-transform mechanism. Linear d.c. motors (LDMs) have excellent performance and controllability. However, the dynamics of small-sized LDMs is adversely affected by the dead-band due to the friction between brushes and commutators. In this paper, it is described that the design of the two-degree-of-freedom positioning system with a LDM using model reference type sliding mode controller (SMC). The proposed positioning system consists of a fixed gain feedforward controller and a SMC used as a feedback controller. The objective of the SMC is to repress the influence of nonlinear characteristics (the dead-band and parameter variations etc.). The tracking performance can be improved as the fixed gain feedforward controller makes a dynamic inverse system in the feedforward path. The effectiveness of the proposed system for improvement of the tracking performance is demonstrated by experimental results.
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
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.
Solid state circuit controls direction, speed, and braking of dc motor
Hanna, M. F.
1966-01-01
Full-wave bridge rectifier circuit controls the direction, speed, and braking of a dc motor. Gating in the circuit of Silicon Controlled Rectifiers /SCRS/ controls output polarity and braking is provided by an SCR that is gated to short circuit the reverse voltage generated by reversal of motor rotation.
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.
Sistema servo-mecanismo didáctico com motores DC e passo-a-passo
Costa, Sandra Catarina Otero da Silva e
2009-01-01
O presente trabalho propõe-se a criar uma plataforma de controlo de motores DC e passo a passo, de forma a contribuir para um laboratório no DET. Para tal foi desenvolvido uma plataforma onde fosse possível de forma simples alterar o acoplamento dos motores, de forma a fazer vários estudos sobre os mesmos.
Energy Technology Data Exchange (ETDEWEB)
Kolhe, Mohanlal; Kolhe, Sunita [Regional Engineering Coll., Maulana Azad Coll. of Technology, Bhopal (India); Joshi, J.C. [Indian Inst. of Technology, Centre for Energy Studies, New Delhi (India)
2000-12-01
The DC permanent magnet motor coupled with centrifugal pump has the better matching when directly powered by photovoltaic (PV) array. The important parameter of DC permanent magnet (DC PM) motor is magnetic field constant of DC PM motor, when powered by PV, has been obtained, and its analysis has been carried out for different magnetic field constants. It has been found that the maximum output is available at the output-energy-weighted average value of magnetic field constant. The parameter, magnetic field constant, should be properly selected during the design of DC PM motor in order to extract the maximum power from PV array. (Author)
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.
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.
Improved Analytical Model of a Permanent-Magnet Brushless DC Motor
P. Kumar; Bauer, P
2008-01-01
In this paper, we develop a comprehensive model of a permanent-magnet brushless DC (BLDC) motor. An analytical model for determining instantaneous air-gap field density is developed. This instantaneous field distribution can be further used to determine the cogging torque, induced back electromotive force, and iron losses in the motor. The advantage of analytical models is that they can be readily used for optimization of BLDC motor because they are fast.
Technology of Performance Improvement Brushless DC Motors and Inverter for Air conditioning
Baba, Kazuhiko; Matsuoka, Atsushi; Shinomoto, Yosuke; Arisawa, Koichi
High efficiency motors are demanded because of the viewpoint of environmental preservation. It is necessary to develop the technology of the energy conservation that can be achieved at low cost so that we may expand high efficiency motors onto the world. In this paper, the current status of the brushless DC motors and invertors to satisfy high efficiency, small size, high power and low cost is reviewed.
Control System of Sensorless Brushless DC Motor Based on TMS320F240
Li Zeng; Zicheng Li
2011-01-01
A brushless DC(BLDC) motor with the characteristics of high speed and high power density has been more widely used in industrial area. The BLDC motor requires the position and speed sensors for control. However the position sensors are undesirable from standpoints of size, cost, maintenance and reliability. There are some different ways that can solve this problem, depending on the flux distribution. This paper describes a control system of sensorless BLDC motor. The back-EMF is adopted to de...
Rapid virtual prototyping of electric vehicles using DQ behavioral model of a brushless DC motor
Cooper, Ian; Wilson, Peter R.; Brown, Andrew D.
2013-01-01
This paper presents a system level for the effective and rapid design and evaluation of a complete electric vehicle system. Several critical components are examined including the mechanical model of the vehicle, the electric motor (with its associated power electronic components) and the energy storage system.A Brushless DC (BLDC) motor Saber model that integrates the DQ axis transformations within the electro-mechanical motor model is developed that facilitates fast and accurate characteriza...
Electromagnetic Flux Analysis of Permanent Magnet Brushless DC Motor Using Magnet Software
G.R.Puttalakshmi; S Paramasivam
2013-01-01
Permanent Magnet Brushless DC (PMBLDC) motors is emerging as a suitable motor for a number of drive applications in industrial and consumer products. Cogging torque is one of the important drawbacks of PMBLDC motor which results in shaft vibrations and noise. The focus of this work is to minimize the electromagnetic flux and cogging torque in PMBLDC by introducing structural design modifications. The performance of the machine is analyzed by varying the magnet pole shape, magnet pole width an...
Directory of Open Access Journals (Sweden)
Boumediène ALLAOUA
2009-07-01
Full Text Available In this paper, an intelligent controller of DC Motor drive is designed using particle swarm optimization (PSO method for formative the optimal proportional-integral-derivative (PID controller Tuning parameters. The proposed approach has superior feature, including easy implementation, stable convergence characteristics and very good computational performances efficiency. The DC Motor Scheduling PID-PSO controller is modeled in MATLAB environment. Comparing with fuzzy logic controller using PSO intelligent algorithms, the planned method is more proficient in improving the speed loop response stability, the steady state error is reduced, the rising time is perfected and the disturbances do not affect the performances of driving motor with no overtaking.
Research and Application of Variable Rate Fertilizer Applicator System Based on a DC Motor
Jia, Honglei; Feng, Xianzhen; Qi, Jiangtao; Liu, Xinhui; Liu, Chunxi; Yang, Yongxi; LI Yang
2013-01-01
With the aim to simplify the electrical component structure of the present variable rate fertilizer applicator system, a kind of variable rate fertilizer applicator control system was developed. It is based on low voltage DC motor. The working voltage of this system is not higher than 12V DC, which can be supplied by the tractor’s storage battery directly. With the encoder measuring the motor speed, it could response the running state of the motor in real time. A kind of control model based o...
Estimation parameters and black box model of a brushless DC motor
José A. Becerra-Vargas; Francisco E. Moreno-García; Juan J. Quiroz-Omaña; Deyanira Bautista-Arias
2014-01-01
The modeling of a process or a plant is vital for the design of its control system, since it allows predicting its dynamic and behavior under different circumstances, inputs, disturbances and noise. The main objective of this work is to identify which model is best for a permanent magnet brushless DC specific motor. For this, the mathematical model of a DC motor brushless PW16D, manufactured by Golden Motor, is presented and compared with its black box model; both are derived from experimenta...
Siahaan, Ramcheys
2012-01-01
Kinerja suatu motor arus searah dikatakan baik jika efisiensi motor tersebut tinggi. Hal itu dapat dicapai dengan mengatur bagian-bagian tertentu dari motor. Perubahan posisi sikat pada motor DC mempengaruhi efisiensinya. Dari hasil pengujian posisi sikat yang berada 300 di sebelah kanan dari posisi tengah memiliki efisiensi motor tertinggi sebesar 59.40%.
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.
Brushless DC micro-motor with external rotor
International Nuclear Information System (INIS)
The increasing use of high-tech electronic components has led researchers to try new solutions in the field of micro-scale electrical machinery. One such solution, described in this paper, consists of the substitution of a conventional mechanical commutator with an electronic type so as to allow the conversion of a electromagnetic micro-motor into a brushless version using permanent magnets. The comparison of the two micro-motor alternatives evidences the clear superiority of the brushless micro-motor
A microprocessor-based speed controller for DC motors
Bertran Albertí, Eduardo; Herranz, J.; Martinez, L.; Miguel, J.; Munilla, I.
1983-01-01
The introduction of microprocessors into electric vehicles has opened many interesting possibilities for improving the operation and maintenance of such automotive systems. On the other hand, microcomputer-based motor control systems are playing an ever increasing role in research on applied electronics. In this paper, a microcomputer-based digital dynamic control system (DDC) for a de motor is described. The description includes motor identification and corrector digital implementation, as w...
Speed Control of DC Motor under Varying Load Using PID Controller
Directory of Open Access Journals (Sweden)
Muhammad Rafay Khan
2015-08-01
Full Text Available DC motors are used extensively in industrial variable speed applications because of most demanding speed-torque characteristics and are simple in controlling aspects. This paper presents a DC motor speed controlling technique under varying load condition. The linear system model of separately excited DC motor with Torque-variation is designed using PID controller. A Matlab simulation of proposed system with no-Load and full-load condition is performed on Simulink platform to observe the system response. The motor speed is kept constant in this experiment. The simulation result of the experiment shows that a motor is running approximately at a constant speed regardless of a motor load. The Simulink results show that the speed of the motor is slow down only for about 270 rpm (9% in 980 milliseconds under the effect of full load. However, the motor speed is hunting about 200 rpm (6.66% in 900 milliseconds on unloading condition. It is concluded that a PID controller is successful tool for controlling the motor speed in presence of load disturbances.
A real-time digital adaptive tracking controller for a dc motor
Energy Technology Data Exchange (ETDEWEB)
Hwang, S. [Purdue Univ., Fort Wayne, IN (United States). Dept. of Electrical Engineering Technology
1995-12-31
The objective of this design is to implement an accurate and cost effective adaptive tracking controller for a DC motor using an 80C196kr microcontroller system. The on-chip embedded functions, optical quadrature encoder and a Pulse Width Modulated (PWM) waveform generator, are used to measure motor positions and generate DC voltages to drive a DC motor respectively. A homing routine that incorporates a photo electric sensor is used to position the motor at a reference point. Users communicate with the system through a 4x4 matrix keypad and 20x2 LCD display or through a PC. The experimental results have shown the validity of this simple microcontroller-based digital control system. This system is performed on a real-time basis, and the control law can be easily replaced by any advanced control laws without changing the hardware setup.
Permanent Magnet DC Motor Sliding Mode Control System
Vaez-Zadeh, S.; Zamanian, M.
2000-09-01
In this paper a sliding mode controller (SMC) is designed for a permanent magnet, direct current (PMDC) motor to enhance the motor performance in the presence of unwanted uncertainties. Both the electrical and mechanical signals are used as the inputs to the SMC. The complete motor control system is simulated on a personal computer with different design parameters and desirable system performance is obtained. The experimental implementation of the motor control system is also presented. The test results confirm the simulation results and validate the proposed control system.
Energy Technology Data Exchange (ETDEWEB)
Marks, W.; Ritz, S. [Austria Mikro Systeme International AG, Dresden (Germany). Design Center
2001-06-12
The AS8410 circuit for PWM control of DC motors combines two near-incompatible characteristics, i.e. high efficiency (>95$) and low electromagnetic radiation (below the standards set in VDE0871, VDE0875, VDE0879) even in the high-frequency spectral range in spite of high PWM frequencies. Comprehensive error diagnosis and error remedy routines as well as simply programmable modes of operation enable reliable, low-cost applications in a wide spectrum of DC motor control. [German] Der Steuerschaltkreis AS8410 zur PWM-Ansteuerung von DC-Motoren kombiniert zwei bisher als unvereinbar geltende Eigenschaften bei elektronisch gesteuerten Gleichstrommotoren: Einen hohen Wirkungsgrad (>95%) und niedrige elektromagnetische Abstrahlungen, sogar im hochfrequenten Spektralbereich, die deutlich unterhalb der Normen VDE0871, VDE0875, VDE0879 liegen, und das trotz gleichzeitig hoher PWM-Frequenzen. Eine umfangreiche Lastfehlerdiagnose mit Fehlerbehandlungsroutinen sowie einfach programmierbare Betriebsmodi ermoeglichen sichere und preiswerte Applikationen in einem breiten Applikationsspektrum von DC-Motor-Steuerungen. (orig.)
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.
A new approach to an optimal adaptive real time DC motor drive control
Energy Technology Data Exchange (ETDEWEB)
Lukic, V.P.; Hall, J.B. [North Carolina Univ., Charlotte, NC (United States)
2007-07-01
The dynamic operation of a DC motor drive depends on the choice of the regulator structure and synthesis of the regulator parameters. For that reason, the authors developed an approach to a real time optimal parameters adjustment for a DC motor drive. The approach is based on the system sensitivity analysis and identification theory. This innovative concept and algorithm provide a tool to control a DC motor drive in real time with an adaptive controller. The DC motor drive mathematical model was described by a set of the first order differential equations with constant coefficients. The regulator has speed and current control channels. The structure of the algorithm includes the sensitivity model, system sensitivity functions evaluation, and the circuits for the parameter incremental changes. The performance index is an integral of the squared error of the speed variation during the transients. The following four parameters were adjusted: the gains of the speed and current regulator in direct path; two gains in two feedback channels; and, speed and current control channels. The actual system was simulated by a system model and the algorithm was applied to a DC motor drive with typical parameters. Several numerical experiments were also carried out. The experiments validated the effectiveness and feasibility of the concept and algorithm. 6 refs., 5 figs., 1 appendix.
Application of permanent magnets made from NdFeB powder and from mixtures of powders in DC motors
International Nuclear Information System (INIS)
The paper presents the influence of magnetic properties of applied permanent magnets on the characteristics of DC motors excited with these magnets. In the factory-produced DC motors, excited with sintered ferrite magnets, authors replaced ferrite magnets with the dielectromagnets from NdFeB powder and from different mixtures of NdFeB and ferrite powders. The paper shows the increase of the power of the resultant DC motors according to the powders' content
L Khakim; Sunarno -; Sugiyanto -
2013-01-01
Penelitian ini adalah penelitian pengembangan desain rancang bangun sistem pengendalian otomatis yang digerakkan dengan dua motor DC sehingga mampu mempertahankan kelembaman pada arahnya. Sistem otomatis ini terdiri dari sensor KMZ51 sebagai komponen feedback dan dua motor DC sebagai komponen plant. Pengujian dari sistem otomatis dibagi menjadi tiga yaitu pengujian sensor KMZ51, pengujian PWM sebagai penggerak motor DC dan pengujian performansi kontrol PID. Hasil pengujian menunjukkan nilai k...
Edie, P. C.
1981-01-01
Both straight and chopped dc motor performance data for a General Electric 5BY436A1 motor with a General Electric EV-1 controller is presented in tabular and graphical formats. Effects of motor temperature and operating voltage are also shown. The maximum motor efficiency is approximately 85% at low operating temperatures in the straight dc mode. Chopper efficiency can be assumed to be 95% under all operating conditions. For equal speeds, the motor operated in the chopped mode develops slightly more torque and draws more current than it does in the straight mode.
Brushless DC Motor and Resolver for Venusian Environment Project
National Aeronautics and Space Administration — In response to the need for motors, actuators and sample acquisition system that can operate in the harsh Venusian environment for extended periods of time, on the...
Brushless DC Motor and Resolver for Venusian Environment Project
National Aeronautics and Space Administration — In response to the need for motors and actuators that can operate in the harsh venusian environment for extended periods of time, on the order of several hours to...
Analysis of an AC-DC full-controlled converter supplying two DC-Series-Motor loads
International Nuclear Information System (INIS)
Phase-controlled converters are widely used because these converters are simple, less expensive, reliable, and do not require any communication circuit. Series motors are extensively used in many applications that require both high starting torque and essentially constant horse power. This paper is concerned with the detailed study of the performance characteristics of an AC-DC full-controlled converter supplying two DC-series-motor loads. The converter loads combination is simulated on a digital computer. Different modes of operation (continuous and discontinuous converter currents) are considered. The critical firing angle at which the mode of operation changes from one mode to another is deduced. The performance characteristics such input power factor, supply current distortion factor, supply current fundamental power factor, torque speed, and motor current ripple factor have been derived and studied for both constant firing angle and constant load factor have been derived and studied for both constant firing angle and constant load power of one motor. Waveforms for each load current and converter current are investigated for different modes of operation. (author)
High temperature brushless DC motor system and its operation mode control
Institute of Scientific and Technical Information of China (English)
邹继斌; 胡建辉; 徐永向
2001-01-01
The high temperature ( 175 ℃ ) operation of a motor spells out special requirements for control algorithms, materials and elements. The stability of motor characteristic is guaranteed by the digital control strategy. Constant velocity operation is achieved by phase-locked loop ( PLL), and constant power operation is achieved by a current-restricting circuit. A motor for constant speed and constant power operation has been built and the speed control system is tuned by MATLAB simulation. Experimental and simulation results for operation mode control of brushless DC motor are presented.
A Motor friendly Quasi-resonant DC-link Inverter
Kedarisetti, Jayalakshmi
2012-01-01
Feeding electrical motors by long cables using PWM inverters has become lately problematic due to developments in semiconductor technology. Most used in converters, insulated gate bipolar transistors IGBTs switch voltages with high gradients, about 10kV/μs. On one hand, faster switching transients lead to the reduction of switching losses and therefore, permissible higher switching frequencies, reduction of harmonics and audible noise at motors. On the other hand, bigger voltage gradients com...
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.
Comparative Study of Controller Design for Four Quadrant Operation of Three Phase BLDC Motor
Ms.K.Suganya*1
2014-01-01
Brushless DC motor drives are becoming more popular in industrial and traction applications. The control of BLDC motor in four quadrants is very vital. The three-phase permanent magnet brushless dc motor inherently needs an electronic commutation circuit to drive it, because it is not a self-commutating motor. It is contrary to the conventional brush motor which commutates itself. This paper presents a comparison study of three type of control such as PI, PID & fuzzy. The char...
Graphical User Interface Aided Online Fault Diagnosis of Electric Motor - DC motor case study
Directory of Open Access Journals (Sweden)
POSTALCIOGLU OZGEN, S.
2009-10-01
Full Text Available This paper contains graphical user interface (GUI aided online fault diagnosis for DC motor. The aim of the research is to prevent system faults. Online fault diagnosis has been studied. Design of fault diagnosis has two main levels: Level 1 comprises a traditional control loop; Level 2 contains knowledge based fault diagnosis. Fault diagnosis technique contains feature extraction module, feature cluster module and fault decision module. Wavelet analysis has been used for the feature extraction module. For the feature cluster module, fuzzy cluster has been applied. Faults effects are examined on the system using statistical analysis. In this study Fault Diagnosis technique obtains fault detection, identification and halting the system. In the meantime graphical user interface (GUI is opened when fault is detected. GUI shows the measurement value, fault time and fault type. This property gives some information about the system to the personnel. As seen from the simulation results, faults can be detected and identified as soon as fault appears. In summary, if the system has a fault diagnosis structure, system dangerous situations can be avoided.
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.
The Digital PI Control for Driving Constant Speed of Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Yoon, Shin Yong; Kim, Yong; Baek, Soo Hyun [Dongguk University (Korea); Kim, Hyun Soo [Chang Hung Telecom Co., Ltd. (Korea); Kim, Il Nam [Dongseoul College (Korea)
2000-06-01
This paper presents the improvement for speed characteristics of a Brushless DC Motor (BLDCM), it was applied to digital PI control for this. The practical PID control has been widely used to velocity control of DC motor. In this paper, a digital PI controller is used in order to decrease to speed error in constant velocity control of BLDCM. A TMS320C31 DSP is used for the microprocessor of digital PI control. The method using the DSP carry out the real-time control. The DSP has the rapid calculation ability and sampling time used 1ms. Driving BLDCM used 50W, motor input DC 150V and rotation speed 3000rpm. When BLDCM is to approval for discretion velocity at the acceleration and deceleration driving with any load, it was a feasible for stabilization control. Therefore, the experimental results indicate the superiority and validity of the velocity control by digital PI control. (author). 7 refs., 15 figs., 2 tabs.
Chaos anticontrol and synchronization of three time scales brushless DC motor system
Energy Technology Data Exchange (ETDEWEB)
Ge Zhengming E-mail: zmg@cc.nctu.edu.tw; Cheng Juiwen; Chen Yensheng
2004-12-01
Chaos anticontrol of three time scale brushless dc motors and chaos synchronization of different order systems are studied. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. By adding constant term, periodic square wave, the periodic triangle wave, the periodic sawtooth wave, and kx vertical bar x vertical bar term, to achieve anticontrol of chaotic or periodic systems, it is found that more chaotic phenomena of the system can be observed. Then, by coupled terms and linearization of error dynamics, we obtain the partial synchronization of two different order systems, i.e. brushless DC motor system and rate gyroscope system.
Speed Control of Multi Level Inverter Designed DC Series Motor with Neuro-Fuzzy Controllers
MadhusudhanaRao, G
2009-01-01
This paper describes the speed control of a DC series motor for an accurate and high-speed performance. A neural network based controlling operation with fuzzy modeling is suggested in this paper. The driver units of these machines are designed with a Multi-level inverter operation and are controlled by a common current control mechanism for an accurate and efficient driving technique for DC series motor. The neuro-fuzzy logic control technique is introduced to eliminate uncertainties in the plant parameters of the DC Series motors, and also considered as potential candidate for different applications to prove adequacy of the proposed control algorithm through simulations. The simulation result with such an approach is made and observed efficient over other controlling technique.
Chaos anticontrol and synchronization of three time scales brushless DC motor system
International Nuclear Information System (INIS)
Chaos anticontrol of three time scale brushless dc motors and chaos synchronization of different order systems are studied. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. By adding constant term, periodic square wave, the periodic triangle wave, the periodic sawtooth wave, and kx vertical bar x vertical bar term, to achieve anticontrol of chaotic or periodic systems, it is found that more chaotic phenomena of the system can be observed. Then, by coupled terms and linearization of error dynamics, we obtain the partial synchronization of two different order systems, i.e. brushless DC motor system and rate gyroscope system
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.
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.
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)
Roni Permana Saputra; Rizqi Andry Ardiansyah; Midriem Mirdanies; Arif Santoso; Aditya Sukma Nugraha; Anwar Muqorobin; Hendri Maja Saputra; Vita Susanti; Estiko Rijanto
2012-01-01
This paper discusses the design of control system for brushless DC motor using microcontroller ATMega 16 that will be applied to an independent 4-wheel drive Mobile Robot LIPI version 2 (REV-11). The control system consists of two parts which are brushless DC motor control module and supervisory control module that coordinates the desired command to the motor control module. To control the REV-11 platform, supervisory control transmit the reference data of speed and direction of motor to cont...
Static and dynamic wind turbine simulator using a converter controlled dc motor
Energy Technology Data Exchange (ETDEWEB)
Monfared, Mohammad; Rastegar, Hasan [Department of Electrical Engineering, Amirkabir University of Technology, Tehran (Iran); Madadi Kojabadi, Hossein [Department of Electrical Engineering, Sahand University of Technology, Tabriz 51335-1996 (Iran)
2008-05-15
This paper describes a new wind turbine simulator for dynamic conditions. The authors have developed an experimental platform to simulate the static and dynamic characteristics of real wind energy conversion system. This system consists of a 3 kW dc motor, which drives a synchronous generator. The converter is a 3 kW single-phase half-controlled converter. MATLAB/Simulink real time control software interfaced to I/O board and a converter controlled dc motor are used instead of a real wind turbine. A MATLAB/Simulink model is developed that obtains wind profiles and, by applying real wind turbine characteristics in dynamics and rotational speed of dc motor, calculates the command shaft torque of a real wind turbine. Based on the comparison between calculated torques with command one, the shaft torque of dc motor is regulated accordingly by controlling armature current demand of a single-phase half-controlled ac-dc converter. Simulation and experimental results confirm the effectiveness of proposed wind turbine simulator in emulating and therefore evaluating various turbines under a wide variety of wind conditions. (author)
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. PMID:25893208
A Study on Reduction of Torque Ripple due to Commutation in Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Lee, Kwang Woon; Hong, Hee Jung; Park, Jung Bae; Yeo, Hyeong Gee; Yoo, Ji Yoon [Korea University, Seoul (Korea)
1998-11-01
Phase commutation in brusless DC motor brings about an instantaneous change in the average voltage of conducting phase so that phase current undulates, and this undulating current generates torque ripple. This paper presents a new current control method to reduce the torque ripple due to phase commutation, when the unipolar PWM method is applied for the phase current control of brushless DC motor. In this paper, we analyze average voltage variations of conducting phase in commutation period with PWM pattern and design current controller to compensate average voltage variations. In addition, we prove the validity of proposed method by experimental results. (author). 7 refs., 13 figs., 1 tab.
CFD Measurements of the Cooling Air in a DC-Motor
Amanatidou, Rebeka
2008-01-01
The cooling system of a DC-motor is examined in this thesis. A change of direction of the cooling air is desired to prevent the generated coal dust from entering into the windings of the machine. Ultimately this will have a negative effect on the cooling in the machine and the loss of cooling needs to be compensated through other ways. The purpose of this thesis is to work for an improved operational safety and performance of the DC-motor and to make it more competitive in the market. By mo...
Efficiency of particle swarm optimization applied on fuzzy logic DC motor speed control
Directory of Open Access Journals (Sweden)
Allaoua Boumediene
2008-01-01
Full Text Available This paper presents the application of Fuzzy Logic for DC motor speed control using Particle Swarm Optimization (PSO. Firstly, the controller designed according to Fuzzy Logic rules is such that the systems are fundamentally robust. Secondly, the Fuzzy Logic controller (FLC used earlier was optimized with PSO so as to obtain optimal adjustment of the membership functions only. Finally, the FLC is completely optimized by Swarm Intelligence Algorithms. Digital simulation results demonstrate that in comparison with the FLC the designed FLC-PSO speed controller obtains better dynamic behavior and superior performance of the DC motor, as well as perfect speed tracking with no overshoot.
Incorporation of fractional-order dynamics into an existing PI/PID DC motor control loop.
Tepljakov, Aleksei; Gonzalez, Emmanuel A; Petlenkov, Eduard; Belikov, Juri; Monje, Concepción A; Petráš, Ivo
2016-01-01
The problem of changing the dynamics of an existing DC motor control system without the need of making internal changes is considered in the paper. In particular, this paper presents a method for incorporating fractional-order dynamics in an existing DC motor control system with internal PI or PID controller, through the addition of an external controller into the system and by tapping its original input and output signals. Experimental results based on the control of a real test plant from MATLAB/Simulink environment are presented, indicating the validity of the proposed approach. PMID:26639053
A Passivity-based Control for DC Motor Drive System with PWM
Honghua Wang; Jiawei Huang
2012-01-01
This paper investigates a passivity-based control (PBC) for DC Motor drive system with PWM. In the paper, the port-controlled Hamiltonian system with dissipation (PCHD) model of the system is built and the interconnection and damping assignment passivity-based control (IDA-PBC) method is used for the design of the controller. The system simulation model is built based on MATLAB/Simulink and the simulation results validate that the DC Motor drive system based on PBC controller has excellent dy...
A Passivity-based Control for DC Motor Drive System with PWM
Directory of Open Access Journals (Sweden)
Honghua Wang
2012-12-01
Full Text Available This paper investigates a passivity-based control (PBC for DC Motor drive system with PWM. In the paper, the port-controlled Hamiltonian system with dissipation (PCHD model of the system is built and the interconnection and damping assignment passivity-based control (IDA-PBC method is used for the design of the controller. The system simulation model is built based on MATLAB/Simulink and the simulation results validate that the DC Motor drive system based on PBC controller has excellent dynamic performances such as robustness and transient response, compared with the traditional PI controller.
Approaches to Suppressing Shaft Voltage in Brushless DC Motor Driven by PWM Inverter
Iimori, Kenichi; Shinohara, Katsuji; Yamamoto, Kichiro; Morigami, Atsushi
This paper describes the approaches to suppressing the shaft voltage and bearing current by electrostatic shielding the stator end windings of the brushless DC motor driven by PWM inverter. At first, measured shaft voltage and bearing current are compared with those calculated waveforms to verify the common mode equivalent circuit of the brushless DC motor. Next, relationship between shaft voltage and stator winding to rotor capacitance is calculated using the common mode equivalent circuit. Finally, the electrostatic shielding of the stator end windings is evaluated to reduce the shaft voltage by experiments and calculations.
Stabilizing sliding mode control design and application for a dc motor: Speed control
Rhif, Ahmed
2012-01-01
The regulation by sliding mode control (SMC) is recognized for its qualities of robustness and dynamic response. This article will briefly talk about the regulation principles by sliding mode as well as the application of this approach to the adjustment of a speed control DC motor bench using the TY36A/EV unit. This unit, from Electronica Veneta products, uses a PID controller to control the speed and position of the DC motor. Our purpose is to improve the set time answer and the robustness o...
An improved Direct Adaptive Fuzzy controller for an uncertain DC Motor Speed Control System
Chunjie Zhou; Shuang Huang; Quan Yin; Duc Cuong Quach
2013-01-01
In this paper, we present an improved Direct Adaptive Fuzzy (IDAF) controller applied to general control DC motor speed system. In particular, an IDAF algorithm is designed to control an uncertain DC motor speed to track a given reference signal. In fact, the quality of the control system depends significantly on the amount of fuzzy rules-fuzzy sets and the updating coefficient of the adaptive rule. This can be observed clearly by the system error when the reference input is constant and out ...
Simulation Study on Brushless DC Motor Based on Fuzzy-PI Control
Directory of Open Access Journals (Sweden)
Jinli Lei
2011-12-01
Full Text Available Brushless DC motor ( BLDCM is a variable, strong coupling, nonlinear system, the simulation model is hard to be established. To solve this problem, based on the principle and structure of the brushless DC motor (BLDCM, and analyzing the mathematic mode, a simulation model of BLDCM control system is established in Matlab/Simulink by the modular design, and the fuzzy PI control algorithm of prototype is designed. The simulation results show that the fuzzy-PI control speeds up response time, reduces the overshoot, and has strong robust, so it can make the system has better control performance and good applying value.
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.
A New Optimal Current Excitation Scheme of Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Park, S.J. [Koje College, Koje (Korea); Park, H.W. [Korea Naval Academy, Jinhae (Korea)
1999-10-01
In this paper, the novel optimal excitation scheme of BLDCM producing loss-minimized ripple-free torque based on the d-q-0 reference frame is presented including 3-phase unbalanced condition. The optimized phase current waveforms that are obtained by the proposed method can be reference values and the motor winding currents are forced to track it by using the delta modulation technique. As a result, it can be shown that the proposed work provides a simple and clear way of obtaining and controlling optimal motor excitation current. Simulation and experimental results prove the validity and practical applications of the proposed control scheme. (author). 6 refs.,5 figs.
Directory of Open Access Journals (Sweden)
M.Muruganandam
2014-03-01
Full Text Available In this article, the speed of the DC motor is controlled by Hybrid Fuzzy-Neuro controller (FNC. The Hybrid Fuzzy-Neuro controller is designed and tested for different types of DC motors like DC separately excited motor and DC series motor. The motor is fed by DC-DC buck converter (DC chopper. The system has two loops of inner current controller loop and outer Fuzzy-Neuro based speed controller loop. The speed controller gives the duty cycle to generate the PWM signal for the control of chopper. There by the DC chopper controls the speed of the DC motor to the set value. The training data for training the FNC is acquired from Fuzzy Logic Controller (FLC. The performances of FNC are analyzed in respect of load variation and speed variation using MATLAB/Simulink. The FNC reduces the peak overshoot, settling time and steady state error of the DC motor. It is found that the FNC can have better control compared with FLC. This system is implemented in a NXP 80C51 family Microcontroller (P89V51RD2BN based Embedded System.
Brushless DC motor control system responsive to control signals generated by a computer or the like
Packard, D. T. (Inventor)
1985-01-01
A control system for a brushless DC motor responsive to digital control signals is disclosed. The motor includes a multiphase wound stator and a permanent magnet rotor. The motor is arranged so that each phase winding, when energized from a DC source, will drive the rotor through a predetermined angular position or step. A commutation signal generator responsive to the shaft position provides a commutation signal for each winding. A programmable control signal generator such as a computer or microprocessor produces individual digital control signals for each phase winding. The control signals and commutation signals associated with each winding are applied to an AND gate for that phase winding. Each gate controls a switch connected in series with the associated phase winding and the DC source so that each phase winding is energized only when the commutation signal and the control signal associated with that phase winding are present. The motor shaft may be advanced one step at a time to a desired position by applying a predetermined number of control signals in the proper sequence to the AND gates and the torque generated by the motor be regulated by applying a separate control signal and each AND gate which is pulse width modulated to control the total time that each switch connects its associated winding to the DC source during each commutation period.
Predictive diagnostic system for DC motor drives: Forest Products Project fact sheet
Energy Technology Data Exchange (ETDEWEB)
NREL
2000-02-01
This report is a fact sheet on new sensor and control technology written for the NICE3 Program. ENVATEC has addressed a major problem for paper producers with its ENVAIR 4000, a sensor and control technology that optimizes DC motor drive operations by simultaneously monitoring and analyzing eight inputs on DC motors. Attributes, such as motor air temperature, speed, vibration, relative humidity, presence of corrosive gases, airflow, and amperage, are measured for irregularities and then a signal is transmitted across the customer's facility on any network interface. This eliminates unscheduled motor shutdowns, thereby cutting energy costs tied to restarting. Based on successful prototype testing, the ENVAIR 4000 promises a 70% reduction in repair and replacement costs, an 80% reduction in unscheduled downtime and pulp waste, and a 43% drop in CO{sub 2} emissions.
Direct Back EMF Detection Method for Sensorless Brushless DC (BLDC) Motor Drives
Shao, Jianwen
2003-01-01
Brushlesss dc (BLDC) motors and their drives are penetrating the market of home appliances, HVAC industry, and automotive applications in recent years because of their high efficiency, silent operation, compact form, reliability, and low maintenance. Traditionally, BLDC motors are commutated in six-step pattern with commutation controlled by position sensors. To reduce cost and complexity of the drive system, sensorless drive is preferred. The existing sensorless control scheme with the c...
Computation of magnetic field in DC brushless linear motors built with NdFeB magnets
International Nuclear Information System (INIS)
A software package based on finite element technique has been used to compute three-dimensional magnetic fields and static forces developed in brushless d.c. linear motors. As the field flux-source two different types of permanent magnets, one of them being the high energy neodymium- iron-boron type, has been used in computer models. Motors with the same specifications as the computer models were built and experimental results obtained from them are compared with the computed results
Uma Devi Kumaravelu; Sanavullah Mohamed Yakub
2012-01-01
A method of simulation and modeling outer rotor permanent magnet brushless DC (ORPMBLDC) motor under dynamic conditions using finite element method by FEMM 4.2 software package is presented. In the proposed simulation, the torque developed at various positions of the rotor, under a complete cycle of excitation of the stator, is analysed. A novel method of sinusoidal excitation is proposed to enhance the overall torque development of ORPMBLDC motor.
Design of Fuzzy PID controller to control DC motor with zero overshoot
Meenakshi Chourasiya; Prof. Shweta karnik
2014-01-01
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 con...
Start Up Current Control of Buck-Boost Convertor-Fed Serial DC Motor
Yusuf SÖNMEZ; Mahir DURSUN; GÜVENÇ, Uğur; Cemal YILMAZ
2009-01-01
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 s...
Analysis and Design of Conventional Controller for Speed Control of DC Motor -A MATLAB Approach
C. S. Linda; K. K.
2015-01-01
The objective of this paper is to control the speed of the motor using conventional controller; compensator is used to improve the steady state error. To evaluate the performance of the controller, time response analysis is carried out. The time response analysis consists of two type of analysis. One is unit step response analysis and other is performance indices analysis. The paper describes the designing of a closed loop model of the dc motor drive for controlling speed. Accurac...
Ibrahim Al-Abbas
2012-01-01
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 contr...
Directory of Open Access Journals (Sweden)
Uma Devi Kumaravelu
2012-01-01
Full Text Available A method of simulation and modeling outer rotor permanent magnet brushless DC (ORPMBLDC motor under dynamic conditions using finite element method by FEMM 4.2 software package is presented. In the proposed simulation, the torque developed at various positions of the rotor, under a complete cycle of excitation of the stator, is analysed. A novel method of sinusoidal excitation is proposed to enhance the overall torque development of ORPMBLDC motor.
Energy Technology Data Exchange (ETDEWEB)
Biwersi, Stephan; Tavernier, Stephan; Equoy, Samuel [Moving Magnet Technologies (MMT), Besancon (France)
2012-12-01
Moving Magnet Technologies (MMT) from Besancon in France has developed a highly efficient brushless DC motor that is especially suitable for use in electrically supported compressors. It helps to further minimise so-called turbo lag in supercharged internal combustion engines. The following report presents technical details of the electric motor and practical results in combination with an electrically driven compressor. MMT was supported by Swissauto in designing the supercharging system.
Simulation Of Speed Control Of Brushless Dc Motor, With Fuzzy Logic Controller
C.Sheeba Joice; P.Nivedhitha
2014-01-01
Abstract— The electronically commuted Brushless DC motors are widely used in many industrial applications which increase the need for design of efficient control strategy for these noiseless motors. This paper deals with the efficient speed control mechanisms for these drives using meaningful fuzzy sets and rules. The fuzzy logic controller is developed using a MATLAB/ Simulink tool. The paper deals with the possibility of designing a control strategy, to achieve accurate speed control with t...
POSITION CONTROL OF BRUSHLESS DC MOTOR BASED ON DIGITAL SIGNAL PROCESSING
GENÇER, Çetin; İsmail COŞKUN
2006-01-01
Brushless DC Motors (BLDC) have been used widely high performance control systems which are depended on to development of power electronic and control technology. In these motors to fed commutated supply, the control of position without oscilation has been required. In this study, position control of BLDC with digital signal processing has been implemented by a proportional-derivative (PD) controller because of its simple structure. It has been seen that the controller which is proposed from ...
Enhancement of magnetic flux distribution in a DC superconducting electric motor
Hamid, N. A.; Ewe, L. S.; Chin, K. M.
2013-06-01
Most motor designs require an air gap between the rotor and stator to enable the armature to rotate freely. The interaction of magnetic flux from rotor and stator within the air gap will provide the thrust for rotational motion. Thus, the understanding of magnetic flux in the vicinity of the air gap is very important to mathematically calculate the magnetic flux generated in the area. In this work, a finite element analysis was employed to study the behavior of the magnetic flux in view of designing a synchronous DC superconducting electric motor. The analysis provides an ideal magnetic flux distribution within the components of the motor. From the flux plot analysis, it indicates that flux losses are mainly in the forms of leakage and fringe effect. The analysis also shows that the flux density is high at the area around the air gap and the rotor. The high flux density will provide a high force area that enables the rotor to rotate. In contrast, the other parts of the motor body do not show high flux density indicating low distribution of flux. Consequently, a bench top model of a DC superconducting motor was developed where by motor with a 2-pole type winding was chosen. Each field coil was designed with a racetrack-shaped double pancake wound using DI-BSCCO Bi-2223 superconducting tapes. The performance and energy efficiency of the superconducting motor was superior when compared to the conventional motor with similar capacity.
Enhancement of magnetic flux distribution in a DC superconducting electric motor
International Nuclear Information System (INIS)
Most motor designs require an air gap between the rotor and stator to enable the armature to rotate freely. The interaction of magnetic flux from rotor and stator within the air gap will provide the thrust for rotational motion. Thus, the understanding of magnetic flux in the vicinity of the air gap is very important to mathematically calculate the magnetic flux generated in the area. In this work, a finite element analysis was employed to study the behavior of the magnetic flux in view of designing a synchronous DC superconducting electric motor. The analysis provides an ideal magnetic flux distribution within the components of the motor. From the flux plot analysis, it indicates that flux losses are mainly in the forms of leakage and fringe effect. The analysis also shows that the flux density is high at the area around the air gap and the rotor. The high flux density will provide a high force area that enables the rotor to rotate. In contrast, the other parts of the motor body do not show high flux density indicating low distribution of flux. Consequently, a bench top model of a DC superconducting motor was developed where by motor with a 2-pole type winding was chosen. Each field coil was designed with a racetrack-shaped double pancake wound using DI-BSCCO Bi-2223 superconducting tapes. The performance and energy efficiency of the superconducting motor was superior when compared to the conventional motor with similar capacity.
Pengontrolan Arah Putaran Motor DC Berbasis Jaringan Komputer
Koto, Affandy
2011-01-01
Controlling process of electrical motors has resulted in several developing methods as technology advances rapidly. However the control is hindered by the space, if the distance between tools controlled with controller exceeds the tolerance limit, thus the tool can not function as desired. The needs of remote-control system increases progressively in relation with globalization are in which mobility and movement of human is wider and faster. Controlling system will be designed in this researc...
Development of a control system for DC-motor
Siewert, Marcus
2010-01-01
A control system for a BLDC (Brushless Direct Current) motor has been developed in Labview 2009. This report explains how it works, conclusions and some information about things that could have been done differently. This report is also a good introduction to Labview including its advantages and disadvantages. It also explains how a FOC (Field Oriented Control) works. This is the public version of the report which does not include any results or information about the implementation. This info...
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.
Energy Technology Data Exchange (ETDEWEB)
Sharaf, A. M.; Masry, M. [New Brunswick Univ., Dept of Electrical and Computer Engineering, Fredericton, NB (Canada)
1998-11-01
MATLAB simulation of a novel dynamic speed reference trajectory tracking controller using an error driven self-adjustable, self-regulating nonlinear control block is described. Results of the digital simulation of a DC motor drive system take into account the switching inherent delay and other drive/control nonlinearities. The addition of a slow-acting dynamic motor input power tracking loop ensures power energy efficiency, minimum inrush and associated supply line harmonics, minimum load excursions and reduced energy consumption in case of a cyclical inrush type motorized load. 11 refs., 5 figs.
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…
Comparative performance analysis for digital regulators in series DC motor controlled drive
Energy Technology Data Exchange (ETDEWEB)
Rezek, A.J.J.; Pinheiro, C.A.M.; Darido, T.Y.T; Da Silva, V.F.; Vicentini, O.H.S.; Assis, W. de O.
2010-07-01
The performance between conventional digital regulators and digital regulators was compared using fuzzy logic. A controlled DC drive was used for the analysis. Load torque and speed reference disturbances were used to compare the motor speed and current responses while using conventional and fuzzy PI digital regulators in the current and speed control loops of the drive.
Anti-control of chaos of single time-scale brushless DC motor.
Ge, Zheng-Ming; Chang, Ching-Ming; Chen, Yen-Sheng
2006-09-15
Anti-control of chaos of single time-scale brushless DC motors is studied in this paper. In order to analyse a variety of periodic and chaotic phenomena, we employ several numerical techniques such as phase portraits, bifurcation diagrams and Lyapunov exponents. Anti-control of chaos can be achieved by adding an external constant term or an external periodic term. PMID:16893797
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.
Interpolative Control for a d.c. Motor Drive With Genetic Algorithm-based Tuning
Sanda Dale
2009-01-01
There are presented main theoretical and procedural aspects related to design and implementation of interpolative controllers as well as the tuning procedure based on genetic algorithms. As a study case an interpolative control structure for the speed of a d.c. motor drive is developed. Comparisons with initial adaptive system without GA improvements are made through simulations.
Interpolative Control for a d.c. Motor Drive With Genetic Algorithm-based Tuning
Directory of Open Access Journals (Sweden)
Sanda Dale
2009-05-01
Full Text Available There are presented main theoretical and procedural aspects related to design and implementation of interpolative controllers as well as the tuning procedure based on genetic algorithms. As a study case an interpolative control structure for the speed of a d.c. motor drive is developed. Comparisons with initial adaptive system without GA improvements are made through simulations.
Improved Analytical Model of a Permanent-Magnet Brushless DC Motor
Kumar, P.; Bauer, P.
2008-01-01
In this paper, we develop a comprehensive model of a permanent-magnet brushless DC (BLDC) motor. An analytical model for determining instantaneous air-gap field density is developed. This instantaneous field distribution can be further used to determine the cogging torque, induced back electromotive
Novel Motion Sensorless Control of Single Phase Brushless D.C. PM Motor Drive, with experiments
DEFF Research Database (Denmark)
Lepure, Liviu Ioan; Boldea, Ion; Andreescu, Gheorghe Daniel;
2010-01-01
A motion sensorless control for single phase permanent magnet brushless d.c. (PM-BLDC) motor drives, based on flux integration and prior knowledge of the PM flux/position characteristic is proposed here and an adequate correction algorithm is adopted, in order to increase the robustness to noise...
Regulation of an Induction Motor under Broad Changes in DC-Link Voltage
Czech Academy of Sciences Publication Activity Database
Kokeš, Petr; Semerád, Radko
2006-01-01
Roč. 51, č. 4 (2006), s. 363-394. ISSN 0001-7043 Institutional research plan: CEZ:AV0Z20570509 Keywords : induction motor (IM) * DC-link voltage drop * stator flux vector control (SFVC) Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Programmable logic device based brushless DC motor control
Van den Bossche, Alex; Bozalakov, Dimitar; Vyncke, Thomas; Valchev, Vencislav
2011-01-01
In this article a three-phase BLDC motor controller for use in an Ultra-Light Electrical Vehicle is presented. The control is performed using a Programmable Logic Device (CPLD), which doesn’t require any additional processor. In this way a robust and low-complexity control is obtained. For extending the speed range of the BLDC, a phase advance circuit is implemented as well. The power consumption of the controller is very low which is an interesting feature in battery applications.
Magnetic Circuit & Torque Analysis Of Brushless DC Motor
Arif J. Abbas; Mohamed Rashid; Kais Wadi
2013-01-01
This work is concerned with magnetic and torque analysis of BLDCM and with development of a method of designing BLDCM that have symmetric winding on the rotor .make significant contribution to the rotor inductance position difficult. It is also show that the prediction detent torque can be extremely sensitive to the permanent magnet by altering magnet arc width. Finally, simple lumped models that allow one to predict motor performance and characteristics as a function of main dimension,...
Characterization and enhancement of micro brushless DC motor response
Conroy, Joseph; Kehlenbeck, Andrew; Humbert, J. Sean; Nothwang, William
2014-06-01
Commercially available speed controllers, motors, and propellers typically comprise the powertrains of many micro aerial robotic systems, such as quadrotor vehicles. As on board state sensing and processing improves, actuation bandwidth is becoming a significant bottleneck that limits the performance of the entire closed loop system. The performance of the commercial products can be greatly enhanced through the implementation of classical control methods directly at the powertrain level. In this paper, reduced order open loop models for three representative commercially available powertrains were estimated and were compared with closed loop equivalents. Further performance improvement is realized by the addition of a static inverse to mitigate the steady state structured uncertainty of the system.
Magnetic Circuit & Torque Analysis Of Brushless DC Motor
Directory of Open Access Journals (Sweden)
Arif J. Abbas
2013-05-01
Full Text Available This work is concerned with magnetic and torque analysis of BLDCM and with development of a method of designing BLDCM that have symmetric winding on the rotor .make significant contribution to the rotor inductance position difficult. It is also show that the prediction detent torque can be extremely sensitive to the permanent magnet by altering magnet arc width. Finally, simple lumped models that allow one to predict motor performance and characteristics as a function of main dimension, magnet residual flux density and phase current are developed. These models are used as a basis for an approach to designing BLDCM
Unbalanced Magnetic Force Calculation in Brushless DC Motors
Directory of Open Access Journals (Sweden)
Z. Valipoor
2015-03-01
Full Text Available In this paper, an analytical method to calculate the unbalance magnetic pull forces (UMP due to the eccentricity of the rotor with considering the slots impact, is presented. Unbalanced magnetic pull is important because it affects the wear on the bearings as well as noise and vibration. The results of the analytical method, using finite element analysis for a prototype motor, were valid. Some force harmonics have the potential to produce noise and vibration. In order to detect harmonics of unbalance magnet forces, Depending on the fault frequency, the stator currents and spectrum of the vibrations have been analyzed
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...... satisfactory. A drawback is that the voltage ripple in the midpoint increases, if a third harmonic current is injected specially at low speed, which could demand a higher voltage rating of the capacitors. Another drawback is that the higher voltage ripple will stress the capacitors hence the lifetime may be...
Android Cihazlar ile DC Motor Kontrolü
Albayrak, Yalcin; Karamancı, Kaan; Çakıl, Turan; EREN, İbrahim
2015-01-01
Bu çalışmada, Android işletim sistemine sahip cihazların(mobil, tablet vb.) bluetooth 2.0 haberleşme teknolojisi özelliği ile DC motorların devir ve yön kontrolü gerçekleştirilmiştir. Bu kontrol kablosuz haberleşme olarak yapılmaktadır. Kablosuz haberleşme RF(Radyo Frekansı) haberleşme yardımıyla da gerçekleştirilebilirdi ancak Android cihazların günümüzde çok yaygın olarak kullanılması bu çalışmamıza yön vermiştir. Bluetooth haberleşmenin dezavantajı ise RF haberleşme kadar uzak mesafeleri d...
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.
Identification of the parameters of a DC motor state space model
Directory of Open Access Journals (Sweden)
Momir Ranislav Stanković
2013-06-01
Full Text Available A method for the identification of the DC state space model parameters based on the minimization of the error function using the least squares method is described in this paper. The algorithm is practically applied in the laboratory environment on an industrial DC motor. The verification of the results was performed by comparing the characteristic signals of real and modeled systems. The results show that the quality of the identification is satisfactory. Introduction The identification of system parameters is the first step in the analysis and synthesis of control systems. Identification Quality strongly impacts on the results of all other computations. In the theory of automatic control, many methods of identification are developed. Which method will be applied depends on the characteristics of the system. In this paper, we described an identification algorithm based on the least squares method. A practical test of this algorithm of estimation is done on a DC motor. parameter estimation with the least squares method A DC motor is a second-order system described with two differential equations: one which describes electrical and one which describes mechanical parts of the motor. The idea is to analyse the motor as two first-order systems. The main signals are responses of two first order sub-systems on appropriate inputs. Using a discrete state-space model of the motor and applying the least square method on the recorded signals, we get straightforward equations for the computation of all the necessary parameters: Rr, Lr , Je , Fe , Kme and Kem (Eykhoff, Wilsoons, 1974. Experimental results The practical application was realized in the laboratory where a DC middle-power motor was used as a control object. It is coupled with a DC generator which serves as a load. Generation of the input signals and measure of the responses were performed with the acquisition system based on the appropriate acquisition card and the MATLAB
Control digital de un motor síncrono DC Brushless sin sensor de posición de motor
Vargas Martín, Elliot
2013-01-01
Aquest projecte consisteix en el disseny i fabricació d'un controlador digital per a un motor síncron DC Brushless (sense escombretes) que no te sensor de posició, centrant-se’n els motors de vehicles teledirigits d'alta potència que són molt similars als dels vehicles elèctrics però a menor escala. Aquests motors són trifàsics i com no tenen escombretes, la commutació de l'alimentació dels debanats s'aconsegueix amb la commutació elèctrica mitjançant una electrònica de potència controlada...
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.
International Nuclear Information System (INIS)
Photovoltaic (PV) powered directly coupled electro-mechanical system has wide applications (e.g. PV powered cooling fans in green houses, PV water pumping system, solar vehicles). The objective of this work is to analyse the operation of directly PV powered DC PM (direct current permanent magnet) motor – propeller system for selection of motor parameters. The performance of such system mainly depends on the incident solar radiation, operating cell temperature, DC motor and propeller load parameters. It is observed that the operating points of the PV DC PM motor – propeller system matches very closely with the maximum power points (MPPs) of the PV array, if the DC PM motor – propeller parameters have been properly selected. It is found that for a specific application of such type of system, matching of torque–speed operating points with respect to the maximum power points of PV array are very important. It is ascertained through results that the DC PM motor's armature resistance, magnetic field constant, starting current to overcome the starting torque and torque coefficient are the main parameters. In designing a PV powered DC PM motor for a specific application, selection of these parameters are important for maximum utilization of the PV array output. The results of this system are useful for designing of directly PV powered DC PM motor's for aerodynamic applications. - Highlights: • We analyse the performance of directly PV powered DC PM motor – propeller system. • We examine PV electro-mechanical system for selection of DC motor parameters. • Matching of torque–speed curve to maximum power points of PV array is important
Karpagavalli, P.; A. Ebenezer Jeyakumar
2013-01-01
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...
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. PMID:21788017
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. PMID:20726042
Frontocentral DC-potential shifts predicting behavior with or without a motor task.
Morgan, J M; Wenzl, M; Lang, W; Lindinger, G; Deecke, L
1992-12-01
This study was designed to investigate the predictive value of the event-related potentials (ERPs) preceding the initiation of a difficult perceptual-memory task and to investigate whether these ERPs require a motor movement on the part of the subject for their occurrence. Across 4 conditions the DC-potential shifts were recorded from 23 right-handed subjects using DC amplifiers. Although the start of each trial began with a ready signal, the conditions differed in that the subjects initiated the task by a button press in 2 conditions and the computer initiated it in 2 others without a press. The results showed that, especially in the frontocentral electrode sites, the DC-potential shifts which began those trials ending in correct performance were more negative relative to those trials ending in an incorrect response. Those conditions which required the subjects to self-initiate the trial and those which were initiated by the computer showed similar results indicating that the negative DC-potential shifts preceding correct performance are neither produced by nor depend on a task initiating motor movement. The onset of the DC-potential shifts preceded task initiation by up to 4.1 sec indicating that they were more than the Bereitschaftspotential. PMID:1281084
Dynamic analysis of a pulsed-power DC motor-flywheel-generator for fusion research
International Nuclear Information System (INIS)
This paper presents some studies of the dynamic behaviour of a ZMF-500-50 type DC Motor-Flywheel-Generator (DC MFG) for fusion inductive load, using computer simulation. Two analysis methods are employed to study the characteristics of this nonlinear system. One deals with the relation between dynamic performances and system parameters by the root-locus technique, and the other with the algorithm of the computer closed-loop control for exciter regulation to create a long flattop pulsed current. Simulation results confirm that this special control algorithm for the nonlinear system is effective and may be easily implemented on a microcomputer
Multilevel DC Link Inverter for Brushless Permanent Magnet Motors with Very Low Inductance
International Nuclear Information System (INIS)
Due to their long effective air gaps, permanent magnet motors tend to have low inductance. The use of ironless stator structure in present high power PM motors (several tens of kWs) reduces the inductance even further ( and lt; 100(micro)H). This low inductance imposes stringent current regulation demands for the inverter to obtain acceptable current ripple. An analysis of the current ripple for these low inductance brushless PM motors shows that a standard inverter with the most commonly used IGBT switching devices cannot meet the current regulation demands and will produce unacceptable current ripples due to the IGBT's limited switching frequency. This paper introduces a new multilevel dc link inverter, which can dramatically reduce the current ripple for brushless PM motor drives. The operating principle and design guidelines are included
Four quadrant control circuit for a brushless three-phase dc motor
Nola, Frank J. (Inventor)
1987-01-01
A control circuit is provided for a brushless three-phase dc motor which affords four quadrant control from a single command. The control circuit probes acceleration of the motor in both clockwise and counterclockwise directions and braking and generation in both clockwise and counterclockwise directions. In addition to turning on individual transistors of the transistor pairs connected to the phase windings of the motor for 120 deg periods while the other transistor of that pair is off, the control circuit also provides, in a future mode of operation, turning the two transistors of each pair on and off alternately at a phase modulation frequency during such a 120 deg period. A feedback signal is derived which is proportional to the motor current and which has a polarity consistent with the command signal, such that negative feedback results.
The Parameter Estimation and Stability Improvement of the Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Kim, Cherl Jin [Halla University (Korea, Republic of); Im, Tae Bin [Korea Electronics Technology Institute (Korea, Republic of)
1999-03-01
Generally, the digital controller has many advantages such as high precision, robustness to electrical noise, capability of flexible programming and fast response to the load variation. In this study, we have established proper mathematical equivalent model of brushless DC (BLDC) motor and estimated the motor parameter by means of the back-emf measurement as being the step input to the controlled target BLDC motor. And the validity of proposed estimation method is confirmed by the test result of step response. As well, we have designed the reasonable digital controller as a consequence of the root locus method which is obtained from the open-loop transfer function of BLDC motor with hall sensor, and the determination of control gain for variable speed control. Here, revised Ziegler-Nichols tuning method is applied for the proper digital gain establishment, and the system stability is verified by the frequency domain analysis with Bode-plot and experimentation. (author). 8 refs., 18 figs., 1 tab.
A novel configuration for a brushless DC motor with an integrated planetary gear train
Yan, Hong-Sen; Wu, Yi-Chang
2006-06-01
This paper presents a novel configuration of a brushless DC (BLDC) motor with an integrated planetary gear train, which provides further functional and structural integrations to overcome inherent drawbacks of traditional designs. The effects of gear teeth on the magnetic field and performance of the BLDC motor are investigated. Two standard gear profile systems integrated on the stator with feasible numbers of gear teeth are introduced to reduce the cogging torque. An equivalent magnetic circuit model and an air-gap permeance model are applied to analytically analyze the magnetic field, while the validity is verified by 2-D finite-element method (FEM). Furthermore, the motor performance is discussed and compared with an existing design. The results show that the present design has the characteristics of lower cogging torque and torque ripple than the conventional design, which is of benefit to the widely applications on accurate motion and position control for BLDC motors.
A low-cost viscometer based on a permanent magnet dc motor
International Nuclear Information System (INIS)
This paper proposes a pragmatic approach to, and a feasibility study of, a very low cost instrument for on-line and in situ viscosity measurement for engineering applications. It is a simple rotational instrument based on the mixer technique. It utilizes a permanent magnet dc (PMDC) motor which drives a propeller immersed in the test fluid. The viscosity is derived from the motor current when the motor is connected to a fixed supply voltage. The theory which relates PMDC motor current to the resistance to the rotational movement of a body due to the viscosity of the liquid under the test is developed. It is believed that the system provides the basis for a new generation of inexpensive viscometers for process and storage environments. (paper)
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.
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
Directory of Open Access Journals (Sweden)
José A. Becerra-Vargas
2014-08-01
Full Text Available The modeling of a process or a plant is vital for the design of its control system, since it allows predicting its dynamic and behavior under different circumstances, inputs, disturbances and noise. The main objective of this work is to identify which model is best for a permanent magnet brushless DC specific motor. For this, the mathematical model of a DC motor brushless PW16D, manufactured by Golden Motor, is presented and compared with its black box model; both are derived from experimental data. These data, the average applied voltage and the angular velocity, are acquired by a data acquisition card and imported to the computer. The constants of the mathematical model are estimated by a curve fitting algorithm based on non-linear least squares and pattern search using computational tool. To estimate the mathematical model constants by non-linear least square and search pattern, a goodness of fit of 84.88% and 80.48% respectively was obtained. The goodness of fit obtained by the black box model was 87.72%. The mathematical model presented slightly lower goodness of fit, but allowed to analyze the behavior of variables of interest such as the power consumption and the torque applied to the motor. Because of this, it is concluded that the mathematical model obtained by experimental data of the brushless motor PW16D, is better than its black box model.
Numerical analysis of the electromechanically coupled magnetic field in brushless DC motors
International Nuclear Information System (INIS)
This paper presents a numerical method to solve the electromechanically coupled equations in a brushless DC (BLDC) motor, i.e. Maxwell equation, voltage equation and Newton's equations by introducing the nonlinear finite element analysis and the time stepping method. It also investigates the coupling effect of the eccentric motion of a rotor on the characteristics of the magnetic force and the resulting motion of a BLDC motor by analyzing the free response and Fourier transform of the excitation force and the resulting displacement
Adaptive Quasi-Sliding Mode Control for Permanent Magnet DC Motor
Directory of Open Access Journals (Sweden)
Fredy E. Hoyos
2013-01-01
Full Text Available The motor speed of a buck power converter and DC motor coupled system is controlled by means of a quasi-sliding scheme. The fixed point inducting control technique and the zero average dynamics strategy are used in the controller design. To estimate the load and friction torques an online estimator, computed by the least mean squares method, is used. The control scheme is tested in a rapid control prototyping system which is based on digital signal processing for a dSPACE platform. The closed loop system exhibits adequate performance, and experimental and simulation results match.
Adaptive Quasi-Sliding Mode Control for Permanent Magnet DC Motor
Hoyos, Fredy E.; Alejandro Rincón; John Alexander Taborda; Nicolás Toro; Fabiola Angulo
2013-01-01
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...
Modelling of a Serial Wound DC Motor Supplied by a Semi-Controlled Rectifier
Directory of Open Access Journals (Sweden)
Pavel Zaskalicky
2006-01-01
Full Text Available A serial wound DC motor is one of most used electrical machines in a small electrical instruments and home equipments by reason, that its speed is easily controlled by a supply voltage. Suppose that the motor is supplied by a semicontrolled rectifier and operate in open circuit loop. After representing of the mathematical model, a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of the rotor is determined as a function of the magnetic core saturation and of the armature reaction.
Novel Position and Speed Estimator for PM Single Phase Brushless D.C. Motor Drives
DEFF Research Database (Denmark)
Lepure, Liviu I.; Andreescu, Gheorghe-Daniel; Iles, Doris;
2010-01-01
A novel position and speed estimator for single phase permanent magnet brushless d.c. (PMBLDC) motor drives, based on flux integration and prior knowledge of ΨPM (θ) is proposed here and an adequate correction algorithm is adopted in order to increase the robustness to noise and to reduce the...... sensitivity to accuracy of flux linkage estimation. A speed and current close loop control is employed based on the Hall signal and the motor is controlled at different speeds in order to validate the proposed estimation algorithm with satisfying results. The position correction effect is analyzed by...
POSITION CONTROL OF BRUSHLESS DC MOTOR BASED ON DIGITAL SIGNAL PROCESSING
Directory of Open Access Journals (Sweden)
Çetin GENÇER
2006-01-01
Full Text Available Brushless DC Motors (BLDC have been used widely high performance control systems which are depended on to development of power electronic and control technology. In these motors to fed commutated supply, the control of position without oscilation has been required. In this study, position control of BLDC with digital signal processing has been implemented by a proportional-derivative (PD controller because of its simple structure. It has been seen that the controller which is proposed from simulation and experimental studies, has a quick dynamic responce with nonoscillation.
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.
Genetic Design of an Interval Type-2 Fuzzy Controller for Velocity Regulation in a DC Motor
Directory of Open Access Journals (Sweden)
Yazmin Maldonado
2012-11-01
Full Text Available This paper proposes the design of a Type‐2 Fuzzy Logic Controller (T2‐FLC using Genetic Algorithms (GAs. The T2‐FLC was tested with different levels of uncertainty to regulate velocity in a Direct Current (DC motor. The T2‐FLC was synthesized in Very High Description Language (VHDL code for a Field‐programmable Gate Array (FPGA, using the Xilinx System Generator (XSG of Xilinx ISE and Matlab‐Simulink. Comparisons were made between the Type‐1 Fuzzy Logic Controller and the T2‐FLC in VHDL code and a Proportional Integral Differential (PID Controller so as to regulate the velocity of a DC motor and evaluate the difference in performance of the three types of controllers, using the t‐student test statistic.
Comparison between Conventional and Fuzzy Logic PID Controllers for Controlling DC Motors
Directory of Open Access Journals (Sweden)
Essam Natsheh
2010-09-01
Full Text Available Fuzzy logic and proportional-integral-derivative (PID controllers are compared for use in direct current (DC motors positioning system. A simulation study of the PID position controller for the armature-controlled with fixed field and field controlled with fixed armature current DC motors is performed. Fuzzy rules and the inferencing mechanism of the fuzzy logic controller (FLC are evaluated by using conventional rule-lookup tables that encode the control knowledge in a rules form. The performance assessment of the studied position controllers is based on transient response and error integral criteria. The results obtained from the FLC are not only superior in the rise time, speed fluctuations, and percent overshoot but also much better in the controller output signal structure, which is much remarkable in terms of the hardware implementation.
The application of permanent magnet on a dc motor as a driver for a magnetic stirrer
International Nuclear Information System (INIS)
A pair of pole magnet was made in the P3IB and used as a stator field on a dc-motor. This motor is then applied as a driver for making a magnetic stirrer instrument. Beside motor driver, this instrument comprise of a motor support box, a glass support equipped with a heater, as well as a backer glass contained liquid and a magnetic capsule as a stirrer. To observe the characteristic of motor and the optimum input voltage as well as the characteristic of its heating system, the instrument was tested by measuring rotational speed of the motor at various input voltage and also measuring temperature on the glass support as well as on the liquid at various temperature setting. Based on the functional test results it was observed that the rotational speed of motor is linearly increased by increasing the input voltage and the magnetic stirrer has optimum input voltage of 1,5 Volt which produce rotational speed of about 1000 rpm. The heating system used on this instrument has low time response and relatively high temperature fluctuation
Control System of Sensorless Brushless DC Motor Based on TMS320F240
Directory of Open Access Journals (Sweden)
Li Zeng
2011-11-01
Full Text Available A brushless DC(BLDC motor with the characteristics of high speed and high power density has been more widely used in industrial area. The BLDC motor requires the position and speed sensors for control. However the position sensors are undesirable from standpoints of size, cost, maintenance and reliability. There are some different ways that can solve this problem, depending on the flux distribution. This paper describes a control system of sensorless BLDC motor. The back-EMF is adopted to detect the rotor position. The back-EMF is very small in the motor starting process, and it is difficult to obtain rotor position efficiently. A re-setting method of the rotor is proposed in the paper, and current closed loop is used for high-speed and safety in the motor starting process. A good speed and current double closed loops system is designed. The speed and current regulators are implemented by a digital signal processor(DSP. A simple algorithm is used to calculate motor speed indirectly by the software, which simplifies the system hardware structure. The hardware structure and software design of sensorless BLDC motor control system are described in details. The simulation and experimental results have shown the validity of the sensorless control system and the accuracy of the detective position signal obtained.
Directory of Open Access Journals (Sweden)
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.
Evaluation of linear DC motor actuators for control of large space structures
Ide, Eric Nelson
1988-01-01
This thesis examines the use of a linear DC motor as a proof mass actuator for the control of large space structures. A model for the actuator, including the current and force compensation used, is derived. Because of the force compensation, the actuator is unstable when placed on a structure. Relative position feedback is used for actuator stabilization. This method of compensation couples the actuator to the mast in a feedback configuration. Three compensator designs are prop...
On Stability of Open-Loop Operation without Rotor Information for Brushless DC Motors
Zhong Wu; Haotun Lyu; Yongli Shi; Di Shi
2014-01-01
Open-loop operation mode is often used to control the Brushless DC Motors (BLDCMs) without rotor position sensors when the back electromotive force (EMF) is too weak due to the very low rotor velocity. The rotor position information is not necessary in this mode and the stator windings are supplied with voltages under a certain ratio of the amplitude to the frequency. However, the rotor synchronization will be destroyed once if the commutation instant is inappropriate. In order to improve the...
Chaos control of single time-scale brushless DC motor with sliding mode control method
Uyaroğlu, Yılmaz; CEVHER, Barış
2013-01-01
In this paper, the sliding mode control (SMC) scheme of single time-scale brushless DC motor (BLDCM) is investigated. The SMC method consists of 2 sections. To simplify the directive of the stability of the controlled single time-scale BLDCM in the sliding mode, first a special type of PI switching surface is adopted. Second, the SMC controller is obtained to guarantee the occurrence of the PI switching surface. The effectiveness of the theoretical analysis is evaluated by numerical...
Optimal Control for Single-Phase Brushless DC Motor with Hall Sensor
Dawei Meng; Xifeng Wang; Yongming Xu; Yufeng Lu
2013-01-01
This study deals with the optimization control of a single-phase brushless DC motor (BLDCM) with Hall sensor. A simple modeling method with feasible parameter identification is adopted to meet characteristics of single-phase BLDCM. With the linear Hall sensor feedback, the advantages of current-mode control scheme and soft-commutation scheme are proposed to achieve maximum efficiency over the entire speed range. This thesis also develops a low-cost and high efficiency control for single-phase...
Fredy Edimer Hoyos Velasco; Camilo Younes Velosa; Eduardo Antonio Cano Plata; Sebastián Sánchez Aristizábal
2010-01-01
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.
Chaos synchronization and parameters identification of single time scale brushless DC motors
International Nuclear Information System (INIS)
Chaos synchronization and parameters identification of single time scale brushless dc motors are studied in this paper. In order to analyze a variety of periodic and chaotic phenomena, we employ several numerical techniques such as phase portrait, bifurcation diagram, and Lyapunov exponents. By the adaptive control, the improved backstepping design method, the Gerschgorin theorem, and by addition of a monitor, chaos synchronization of two identical BLDCM systems are presented. Then, by the adaptive control, and the random optimization method, parameters identification is approached
Design and Implementation of Fuzzy Logic system for DC motor Speed Control
Maan M. Shaker; Yaareb M.B. Ismeal Al-khashab
2010-01-01
In this paper an integrated electronic system has been designed, constructed and tested. The system utilizes an interface card through the parallel port in addition to some auxiliary circuits to perform fuzzy control operations for DC motor speed control with load and no load. Software is written using (C++ language Ver. 3.1) to display the image as control panel for different types of both conventional and fuzzy control. The main task of the software is to simulate: firs...
Simulation Research on Control System of Brushless DC Motor Based on Fuzzy-PID
Fanneng Zhou; Changjun Qiu; Yulin Wang; Pinghu Chen
2012-01-01
To improve the overall performance of brushless DC motor (BLDCM), fuzzy-PID controller and its application in BLDCM control system are presented. Through the analysis of the mathematical models of BLDCM and combination of fuzzy control strategy and traditional PID control strategy, the modeling and simulation are done by the fuzzy control toolbox of MATLAB. The simulation results show that the fuzzy PID control speeds up response time, reduces the overshoot, and has strong robust and adaptive...
Developing Micro DC-Brushless Motor Driver and Position Control for Fiber Positioners
Jenni, Laurent; Hörler, Philipp; Makarem, Laleh; Kneib, Jean-Paul; Gillet, Denis; Bleuler, Hannes; Bouri, Mohamed; Prada, Francisco; De Rivera, Guillermo; Sanchez, Justo
2014-01-01
In the large-scale, Dark Energy Spectroscopic Instrument (DESI), thousands of fiber positioners will be used. Those are robotic positioners, with two axis, and having the size of a pen. They are tightly packed on the focal plane of the telescope. Dedicated micro-robots have been developed and they use 4mm brushless DC motors. To simplify the implementation and reduce the space occupancy, each actuator will integrate its own electronic control board. This board will be used to communicate with...
An adaptive tracking controller for a brushless DC motor with reduced overparameterization effects
Energy Technology Data Exchange (ETDEWEB)
Hu, J.; Dawson, D.M.; Burg, T.; Vedagarbha, P. [Clemson Univ., SC (United States)
1994-12-31
Using the integrator backstepping approach, we develop a full state feedback, adaptive position tracking controller for a brushless DC (BLDC) motor turning a robotic load. The proposed controller ensures global asymptotic tracking for the rotor position and velocity despite the parametric uncertainties throughout the entire electromechanical system. The overparameterization problem commonly associated with backstepping-type controllers is greatly reduced. Experimental results are used to validate the performance of the controller.
Fuzzy PID Controllers Using Matlab GUI Based for Real Time DC Motor Speed Control
Suhas Yadav*1
2014-01-01
In this paper, an integrated electronic system has been designed, constructed and tested. Controlling DC (Direct current) Motor drive is design and development of real time MATLAB –GUI based using fuzzy logic controller. First, a controller is designed according to fuzzy rules such that the systems are fundamentally robust. To obtain the globally optimal values, parameters of the fuzzy controller are improved by MATLAB-GUI based FLC and IFLC algorithms optimization model. Comp...
A vector modulated three-phase four-quadrant rectifier - Application to a dc motor drive
Energy Technology Data Exchange (ETDEWEB)
Jussila, Matti; Salo, Mika; Kaehkoenen, Lauri; Tuusa, Heikki
2004-07-01
This paper introduces a theory for a space vector modulation of a three-phase four-quadrant PWM rectifier (FQR). The presented vector modulation method is simple to realize with a microcontroller and it replaces the conventional modulation methods based on the analog technology. The FQR may be used to supply directly a dc load, e.g. a dc machine. The vector modulated FQR is tested in simulations supplying a 4.5 kW dc motor. The simulations show the benefits of the vector modulated FQR against thyristor converters: the supply currents are sinusoidal and the displacement power factor of the supply can be controlled. Furthermore the load current is smooth. (author)
Multi-input Fuzzy Logic Controller for Brushless dc Motor Drives
Directory of Open Access Journals (Sweden)
Y. H. Bharathi
2008-01-01
Full Text Available The brushless dc motors are used in various applications such as defence, industries,robotics, etc. In these applications, the motor should be precisely controlled to give the desiredperformance. The proposed controller systems consist of multi-input fuzzy (two-and three-inputlogic controller (FLC and multi-input integrated fuzzy logic controller (IFLC for the speed controlof brushless dc servomotor drive. The input for the controllers are error e(k, change in error[first derivative of error ce(k] and change of change in error [second derivative of error cce(k]with a single-output. The error cce(k is substantial at the overshoots/undershoots and is thereforeessential for accurate speed control of brushless dc motor. The error cce(k has been introducedfor the first time in the literature as one of the input in the FLC and IFLC design. The IFLC isdesigned using FLC and proportional derivation integral (PID controllers. The controller systemshave been studied systematically for the transient and steady-state conditions. The three-inputIFLC is found to be superior, more robust, faster, flexible, and is insensitive to the parametervariations as compared with the FLC (with two-and three-input and conventional two-inputIFLC
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.
NRC Information No. 88-72: Inadequacies in the design of dc motor-operated valves
International Nuclear Information System (INIS)
On July 1, 1988, a high pressure coolant injection (HPCI) steam admission valve failed to open during a post-maintenance test at the Brunswick nuclear power plant, Unit 1. The same valve had failed in December 1987 and on May 28, 1988. The licensee, Carolina Power and Light Company, established a team to investigate the cause of failure, and the team identified the most probable cause as a dc motor failure due to a shunt-winding to series-winding short circuit. The team believed that this condition was precipitated by thermal binding of the valve internals. The previous failure in May was also diagnosed as having been caused by thermal binding. As a result of these failures, the licensee reviewed the design of the dc motor-operated valves for both the HPCI and the reactor core isolation cooling (RCIC) systems. This review identified a number of significant design deficiencies going well beyond the problems with thermal binding. The deficiencies constitute a potential common cause failure mechanism for safety system valves. Unit 1 was shut down on July 14, 1988 to replace the failed HPCI valve motor and to implement design modifications to other motor-operated valves
A robust control method for a PV-supplied DC motor using universal learning networks
Energy Technology Data Exchange (ETDEWEB)
Hussein, A. [Kyushu Univ., Fukuoka (Japan); Hirasawa, Kotaro; Jinglu Hu [Waseda Univ., Fukuoka (Japan). Graduate School of Information, Production and Systems
2004-07-01
In this paper, a new robust control method and its application to a photovoltaic (PV) supplied, separately excited DC motor loaded with a constant torque is discussed. The robust controller is designed against the load torque changes by using the first and second ordered derivatives of the universal learning networks (ULNs). These derivatives are calculated using the forward propagation algorithm, which is considered as an extended version of real time recurrent learning (RTRL). In this application, two ULNs are used: The first is the ULN identifier trained offline to emulate the dynamic performance of the DC motor system. The second is the ULN controller, which is trained online not only to make the motor speed follow a selected reference signal, but also to make the overall system operate at the maximum power point of the PV source. To investigate the effectiveness of the proposed robust control method, the simulation is carried out at four different values of the robustness coefficient {gamma} in two different stages: The training stage, in which the simulation is done for a constant load torque. And the control stage, in which the controller performance is obtained when the load torque is changed. The simulation results showed that the robustness of the control system is improved although the motor load torque at the control stage is different from that at the training stage. (author)
Control of a high-speed, brushless dc motor driven through a cycloconverter line
Cathey, J. J.; Reesor, D. B.; Weimer, J. A.
Feasibility and concept of designing a high-speed, permanent magnet, brushless dc motor aircraft fuel pump drive using a cycloconverter link is examined. Analytical methods are developed to model the behavior of a three-phase permanent magnetic machine when operated as a self-synchronous motor supplied from a polyphase, variable voltage, variable frequency source through a midpoint cycloconverter link under circulating current free mode of control. A hybrid combination of sinusoidal and dc steady-state analysis methods is utilized to obtain a suitable equivalent circuit of the motor. Study of the motor model is made to establish the nature of the no load MMF angle as a function of current to give a minimum value while assuring proper thyristor commutation. Then, a closed loop control system with an outer loop on speed and an inner loop on current is postulated wherein a proportional plus integral controller is placed in the forward path to assure minimum speed error. A numerical study of performance is presented for speed runup and rundown conditions.
A Modified High-Efficient Step-Up Sepic for DC Motor Drives
Directory of Open Access Journals (Sweden)
P. Dhanasekaran
2013-12-01
Full Text Available In this paper, Single-Ended Primary Inductor Converter (SEPIC fed DC motor is proposed. Soft-switching technique such as Zero-Voltage-Switching (ZVS and Zero-Current-Switching (ZCS operation plays a vital role in high voltage applications. Zero-Current-Switching (ZCS operation achieved due to resonance between the resonant inductor and the capacitor by using output diode and its reverse-recovery loss is subsequently reduced. Zero-Voltage-Switching (ZVS operation is achieved by using coupled inductor and auxiliary inductor. The model has been simulated through MATLAB/SIMULINK using Diode Bridge, SEPIC topology and closed loop DC motor load and it is modeled analytically. The proposed system is modeled with input side Diode Bridge Rectifier and SEPIC Topology with Proportional Integral (PI controller. The soft switching scheme for the proposed topology is developed with closed loop motor load. The motor voltage is achieved twice the rated voltage. The results are generated in MATLAB/SIMULINK and are shown.
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
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.
Anti-control of chaos of a permanent magnet DC motor system for vibratory compactors
Energy Technology Data Exchange (ETDEWEB)
Wang Zheng [Department of Electrical and Electronic Engineering, University of Hong Kong, Pokfulam Road, Hong Kong (China)], E-mail: zwang@eee.hku.hk; Chau, K.T. [Department of Electrical and Electronic Engineering, University of Hong Kong, Pokfulam Road, Hong Kong (China)
2008-05-15
The purpose of this paper is to employ time-delay feedback to anti-control a permanent magnet DC (PMDC) motor system for vibratory compactors, and hence implement a new electrically chaotic compactor. Firstly, the dynamic model of the anti-controlled PMDC motor system and the proposed electrically chaotic compactor are formulated. Secondly, a nonlinear map is derived to analyze the chaotic criterion of the anti-controlled PMDC motor system. Then, numerical computations are used to investigate the dynamics of the proposed electrically chaotic compactor. Finally, a series of simulations are conducted to verify that the proposed electrically chaotic compactor not only offers better compaction effects than the conventional one, but also provides higher flexibility than the mechanically chaotic compactor.
Anti-control of chaos of a permanent magnet DC motor system for vibratory compactors
International Nuclear Information System (INIS)
The purpose of this paper is to employ time-delay feedback to anti-control a permanent magnet DC (PMDC) motor system for vibratory compactors, and hence implement a new electrically chaotic compactor. Firstly, the dynamic model of the anti-controlled PMDC motor system and the proposed electrically chaotic compactor are formulated. Secondly, a nonlinear map is derived to analyze the chaotic criterion of the anti-controlled PMDC motor system. Then, numerical computations are used to investigate the dynamics of the proposed electrically chaotic compactor. Finally, a series of simulations are conducted to verify that the proposed electrically chaotic compactor not only offers better compaction effects than the conventional one, but also provides higher flexibility than the mechanically chaotic compactor
Electromagnetic Flux Analysis of Permanent Magnet Brushless DC Motor Using Magnet Software
Directory of Open Access Journals (Sweden)
G.R.Puttalakshmi
2013-08-01
Full Text Available Permanent Magnet Brushless DC (PMBLDC motors is emerging as a suitable motor for a number of drive applications in industrial and consumer products. Cogging torque is one of the important drawbacks of PMBLDC motor which results in shaft vibrations and noise. The focus of this work is to minimize the electromagnetic flux and cogging torque in PMBLDC by introducing structural design modifications. The performance of the machine is analyzed by varying the magnet pole shape, magnet pole width and by using magnetic material with different remenance value. For analyzing the performance of the machine, machine is modeled using Finite Element Analysis (FEA based software package Magnet. Cogging torque and average torque are taken as performance measures to determineoptimum pole shape and pole width.
Energy Technology Data Exchange (ETDEWEB)
Chigiri, T.; Shimada, T.; Watanabe, T.; Ichinokura, O.; Jinzenji, T. [Tohoku University, Sendai (Japan)
1996-11-20
Since the rare metal magnets show the high saturation flux density, the ferrite magnets of the magnetic field poles of PM (permanent magnet) motors have been substituted for them in recent years. The feature of the rare metal magnet realize small size or high power BLM (brushless dc motors). However, the ordinary magnetic field poles of the PM motors generate higher harmonic flux and cause torque ripple. They are usually removed by short pitch winding, skew slot method and so on. But these methods show a drawback to lower efficiency. This problem is important especially for high power BLM. Recently new methods have been proposed to realize zero torque ripple and high efficiency drive at the same time. The methods optimize the reference current waveform which is calculated by motor ENE (electromotive force) in advance, and current are controlled to follow up the optimized one. However, the one method assumes try and error. The other one doesn`t prove that it realizes maximum efficiency and zero torque ripple drive at the same time. And they have much room to improvement to apply to BLM. This paper proposes the simultaneous equations which give the accurate relation among instantaneous torque, EW and current, and proposes a new index CSR which evaluates the relation between copper loss and current waveform. Then the optimized current waveform to drive BLM with zero torque ripple and maximum efficiency is calculated by using new equations and CSR. For this waveform includes triplex harmonic order, normal three phase full bridge inverter can`t be used. This paper proposes four arm full bridge inverter which can apply triplex order current to BLM. Experimental result proves this method is available. 9 refs., 11 figs., 2 tabs.
Directory of Open Access Journals (Sweden)
L Khakim
2013-07-01
Full Text Available Penelitian ini adalah penelitian pengembangan desain rancang bangun sistem pengendalian otomatis yang digerakkan dengan dua motor DC sehingga mampu mempertahankan kelembaman pada arahnya. Sistem otomatis ini terdiri dari sensor KMZ51 sebagai komponen feedback dan dua motor DC sebagai komponen plant. Pengujian dari sistem otomatis dibagi menjadi tiga yaitu pengujian sensor KMZ51, pengujian PWM sebagai penggerak motor DC dan pengujian performansi kontrol PID. Hasil pengujian menunjukkan nilai ketelitian sensor 99.17%. Pada pengujian PWM diperoleh error pengukuran 1.07% dan pengujian performansi sistem didapatkan bahwa penerapan kontrol PID dapat mengatur putaran motor DC sehingga model sistem mampu mempertahankan arahnya pada set point yang telah ditentukan dengan nilai overshoot maximum kurang dari 10%, rise time 2 detik dan settling time kurang dari 5% yang diperoleh pada Kp= 27, Ki= 6, dan Kd= 40 menggunakan metode trial and error.Â This research is design of automatic control system which driven by two DC motors that can keep the inertia of direction. The system is composed of sensor KMZ51 as feedback component and two DC motors as plant component. Testing of the automated system divided into three, KMZ51 sensor testing, PWM testing as drive DC motors, and performance testing of PID control system. The results show that the sensor accuracy values 99.17%, on testing the PWM measurement error obtained 1.07%, and testing of performance system obtained that the application of PID control can adjust DC motors rotation so that the model system is able to maintain direction the set point specified with maximum overshoot less than 10%, rise time of 2 seconds and settling time less than 5% were obtained at Kp= 27, Ki= 6, and Kd= 40 using trial and error method
Energy Technology Data Exchange (ETDEWEB)
Lawler, J.S.
2001-10-29
The brushless dc motor (BDCM) has high-power density and efficiency relative to other motor types. These properties make the BDCM well suited for applications in electric vehicles provided a method can be developed for driving the motor over the 4 to 6:1 constant power speed range (CPSR) required by such applications. The present state of the art for constant power operation of the BDCM is conventional phase advance (CPA) [1]. In this paper, we identify key limitations of CPA. It is shown that the CPA has effective control over the developed power but that the current magnitude is relatively insensitive to power output and is inversely proportional to motor inductance. If the motor inductance is low, then the rms current at rated power and high speed may be several times larger than the current rating. The inductance required to maintain rms current within rating is derived analytically and is found to be large relative to that of BDCM designs using high-strength rare earth magnets. Th us, the CPA requires a BDCM with a large equivalent inductance.
A novel position-sensorless control method for brushless DC motors
International Nuclear Information System (INIS)
This paper presents the design and implementation of a high performance position-sensorless control scheme for the extensively used brushless DC (BLDC) motors. In the proposed method, with proper PWM strategy, instead of detecting the zero-crossing point (ZCP) of the nonexcited motor back electromagnetic force (EMF) or the average motor terminal to neutral voltage, the true zero-crossing points of back EMF are extracted directly from the difference of the specific average line-to-line voltages with simple RC circuits and comparators. In contrast to conventional methods, the neutral voltage is not needed and the diode freewheeling currents in the nonconducted phase are eliminated completely; therefore, the commutation signals are more accurate and insensitive to the common-mode noise. Moreover, 100% pulse-width-modulation (PWM) duty ratio control of BLDC motors is provided with the presented method. As a result, the proposed method makes it possible to achieve good motor performance over a wide speed range and to simplify the starting procedure. The detailed circuit model is analyzed and some experimental results obtained from a sensorless prototype are shown to verify the analysis and confirm the validity of the proposed method.
International Nuclear Information System (INIS)
The brushless dc motor (BDCM) has high-power density and efficiency relative to other motor types. These properties make the BDCM well suited for applications in electric vehicles provided a method can be developed for driving the motor over the 4 to 6:1 constant power speed range (CPSR) required by such applications. The present state of the art for constant power operation of the BDCM is conventional phase advance (CPA)[1]. In this paper, we identify key limitations of CPA. It is shown that the CPA has effective control over the developed power but that the current magnitude is relatively insensitive to power output and is inversely proportional to motor inductance. If the motor inductance is low, then the rms current at rated power and high speed may be several times larger than the current rating. The inductance required to maintain rms current within rating is derived analytically and is found to be large relative to that of BDCM designs using high-strength rare earth magnets. Th us, the CPA requires a BDCM with a large equivalent inductance
Gwaltney, D. A.
2002-01-01
A FY 2001 Center Director's Discretionary Fund task to develop a test platform for the development, implementation. and evaluation of adaptive and other advanced control techniques for brushless DC (BLDC) motor-driven mechanisms is described. Important applications for BLDC motor-driven mechanisms are the translation of specimens in microgravity experiments and electromechanical actuation of nozzle and fuel valves in propulsion systems. Motor-driven aerocontrol surfaces are also being utilized in developmental X vehicles. The experimental test platform employs a linear translation stage that is mounted vertically and driven by a BLDC motor. Control approaches are implemented on a digital signal processor-based controller for real-time, closed-loop control of the stage carriage position. The goal of the effort is to explore the application of advanced control approaches that can enhance the performance of a motor-driven actuator over the performance obtained using linear control approaches with fixed gains. Adaptive controllers utilizing an exact model knowledge controller and a self-tuning controller are implemented and the control system performance is illustrated through the presentation of experimental results.
A novel position-sensorless control method for brushless DC motors
Energy Technology Data Exchange (ETDEWEB)
Zhang, X.Z., E-mail: Z_X_Z2000@163.co [School of Electrical and Information Engineering, Hunan University, Changsha (China) and School of Computer and Communication, Hunan Institute of Engineering, Xiangtan (China); Wang, Y.N. [School of Electrical and Information Engineering, Hunan University, Changsha (China)
2011-03-15
This paper presents the design and implementation of a high performance position-sensorless control scheme for the extensively used brushless DC (BLDC) motors. In the proposed method, with proper PWM strategy, instead of detecting the zero-crossing point (ZCP) of the nonexcited motor back electromagnetic force (EMF) or the average motor terminal to neutral voltage, the true zero-crossing points of back EMF are extracted directly from the difference of the specific average line-to-line voltages with simple RC circuits and comparators. In contrast to conventional methods, the neutral voltage is not needed and the diode freewheeling currents in the nonconducted phase are eliminated completely; therefore, the commutation signals are more accurate and insensitive to the common-mode noise. Moreover, 100% pulse-width-modulation (PWM) duty ratio control of BLDC motors is provided with the presented method. As a result, the proposed method makes it possible to achieve good motor performance over a wide speed range and to simplify the starting procedure. The detailed circuit model is analyzed and some experimental results obtained from a sensorless prototype are shown to verify the analysis and confirm the validity of the proposed method.
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.
The study on electromagnetic compatibility of DC electric motor in HAPS
Energy Technology Data Exchange (ETDEWEB)
Junping, Geng; Ronghong, Jin; Yu, Fan; Bo, Liu; Jiaqiang, Li; Yuebo, Cheng; Zhongyuan, Wang [Shanghai Jiao Tong Univ., Dpt. Electronic Engineering, Shanghai (China)
2005-10-01
The electromagnetic compatibility (EMC) problem of high altitude platform systems (HAPS) is investigated in this paper. A physical model for electromagnetic interferences (EMI) of electromagnetic radiation of spark discharge in DC electric motor is proposed. Based on this model, EMI frequency points has been estimated by approximative equation for the given structure and size of a motor, and EMI frequency points, peak values that received by the ports of antennas and far-field pattern have been calculated. The estimated results are consistent with the calculated ones. These frequency bands and spatial directions with max EMI should be avoided in the valid information when the HAPS system is being designed. Two methods are taken to shield electromagnetic radiation, either to mount a metal plate near the DC electric motor (EMI source), or to mount a perfect conductor board near the antenna array (sensitive element), are valid to shield electromagnetic radiation, but to mount a metal plate near the EMI source is more effective. (authors)
Energy Technology Data Exchange (ETDEWEB)
Wang, Y.; Yamaguchi, M.; Kano, Y. [Tokyo University of Agriculture and Technology, Tokyo (Japan)
1997-11-20
The torque, to some extent, is an important performance index of electric motors. In many permanent magnet DC motors, the armature core is slotted with the winding embedded into the slots. What kind of force occurs on the armature teeth (or slot) and hence forms die torque is an interesting problem. hi the past some relevant researches were reported, which concluded that all torque came from the force generated in the flanks of the armature teeth and the force on the teeth surface facing the field magnet contributed nothing to the output torque. The objective of this paper is to investigate the overall electromagnetic force distribution in the armature teeth of a permanent magnet DC motor. An U-shaped core is employed as an analytical model which covers only one tooth pitch of the slotted an-nature, and the derivation of the force on the surfaces of the U-shaped core is obtained by means of the Maxwell stress method. Experimental results show that both tangential force on the teeth surface facing the field magnet and normal force in the flanks of the teeth contribute to the motion of a rotor. The analytical method and force expressions are verified by the experimental results. 14 refs., 11 figs.
Optimization of PID Controller for Brushless DC Motor by using Bio-inspired Algorithms
Directory of Open Access Journals (Sweden)
Sanjay Kr. Singh
2014-02-01
Full Text Available This study presents the use and comparison of various bio-inspired algorithms for optimizing the response of a PID controller for a Brushless DC Motor in contrast to the conventional methods of tuning. For the optimization of the PID controllers Genetic Algorithm, Multi-objective Genetic Algorithm and Simulated Annealing have been used. PID controller tuning with soft-computing algorithms comprises of obtaining the best possible outcome for the three PID parameters for improving the steady state characteristics and performance indices like overshoot percentage, rise time and settling time. For the calculation and simulation of the results the Brushless DC Motor model, Maxon EC 45 flat ф 45 mm with Hall Sensors Motor has been used. The results obtained the optimization using Genetic Algorithms, Multi-objective Genetic Algorithm and Simulated Annealing is compared with the ones derived from the Ziegler-Nichols method and the MATLAB SISO Tool. And it is observed that comparatively better results are obtained by optimization using Simulated Annealing offering better steady state response.
Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control
Energy Technology Data Exchange (ETDEWEB)
Lawler, J.S.
2000-06-23
The trapezoidal back electromotive force (emf) brushless direct current (dc) motor (BDCM) with surface-mounted magnets has high-power density and efficiency especially when rare-earth magnet materials are used. Traction applications, such as electric vehicles, could benefit significantly from the use of such motors. Unfortunately, a practical means for driving the motor over a constant power speed ratio (CPSR) of 5:1 or more has not yet been developed. A key feature of these motors is that they have low internal inductance. The phase advance method is effective in controlling the motor power over such a speed range, but the current at high speed may be several times greater than that required at the base speed. The increase in current during high-speed operation is due to the low motor inductance and the action of the bypass diodes of the inverter. The use of such a control would require increased current rating of the inverter semiconductors and additional cooling for the inverter, where the conduction losses increase proportionally with current, and especially for the motor, where the losses increase with the square of the current. The high current problems of phase advance can be mitigated by adding series inductance; however, this reduces power density, requires significant increase in supply voltage, and leaves the CPSR performance of the system highly sensitive to variations in the available voltage. A new inverter topology and control scheme has been developed that can drive low-inductance BDCMs over the CPSR that would be required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC). It is shown that the BDCM has an infinite CPSR when it is driven by the DMIC.
Design of DC Motor Driver as a Control System Actuator for Electron Source in Electron Beam Machine
International Nuclear Information System (INIS)
A DC motor driver has been contracted using chopper DC circuit. The DC motor driver consists of an inverting amplifier, a comparator, and a DC chopper unit. The DC chopper circuit is based on H hybrid circuit, so that the polarization and angular velocity of DC motor can be regulated similar with the polarization and value of input signal. The result showed, that the DC motor driver circuit can be used as actuator on the electron source of electron beam machine. The maximum (duty cycle value = 1/2) angular velocity has same value for 10-1 - 10-2 Hertz oscillator frequency range. The increase of angular velocity will be proportional to the oscillator frequency at the constant duty cycle. If this characteristic is related with respond time of the control system, so the control system respond time is dependence on oscillator frequency being used. The use of control system with PC can be realized, because the input signal use low voltage, where the measurement shows that it has 3 - 10 Volt voltage range. (author)
MERIN JOHN, VINU THOMAS
2013-01-01
The Permanent Magnet Brushless DC (BLDC) motor offers higher efficiency, low maintenance, reduced weight and compact construction. For many industrial applications, the BLDC motor is increasingly being used. This paper presents a new sensorless drive scheme for BLDC motor based on the back EMF difference. The commutation point of the drive is determined by detecting the Zero Crossing Point (ZCP) of difference in back EMF of two phases. Simulations of the proposed method have been carried out ...
DESINGING OF ANN BASED SPEED CONTROLLER FOR PHASE CONTROLLED DC MOTOR
Directory of Open Access Journals (Sweden)
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.
Efficiency consideration of DC link soft-switching inverters for motor drive applications
Energy Technology Data Exchange (ETDEWEB)
Lai, J.S.; Young, R.W.; McKeever, J.W.
1994-12-31
This paper critically evaluates efficiency of soft switching inverters including an actively clamped resonant dc link inverter and a clamped-mode resonant pole inverter. An analytical approach to evaluating efficiency of the clamped-mode soft switching inverter has been developed. The evaluation results are compared with that of the standard pulse-width-modulation (PWM) inverter. A 50-kW induction motor is used as the variable load, and the inverter efficiency is evaluated under different speed and torque conditions. The clamped-mode soft-switching inverter, although eliminating the switching loss, shows poor efficiency over the entire load range. Under low load conditions, the efficiency profile is even worse. The actively clamped resonant dc link inverter shows highest efficiency over the entire speed and torque range. However, its energy saving over the standard PWM inverter is marginal under full load or high speed conditions.
直流电动机新论%New Theory of DC Motor
Institute of Scientific and Technical Information of China (English)
王宗培; 陈敏祥
2012-01-01
The author found and put forward the new electromechanical concept of the DC rotating magnetic field in the New DCM research work. The DC rotating magnetic field is produced by the DC armature winding magnetic potential when commutation controller controls the conducting state and order of power switches in the electronic commutator. The change of the instantaneous current in the AC armature winding along the circumference produces an AC rotating magnetic field. Both DC and AC magnetic potential are produced by the armature winding circuit and are no relationship with the rotor mechanical relative motion. From the rotor? Perspective there is no difference between the armature winding magnetic potential produced by the DC winding current and the AC winding current. So the DC rotating magnetic field combined with different rotor structure can constitute the new concepts of the DC synchronous motor and the DC asynchronous motor, which are similar with the concepts of the AC synchronous motor and the AC asynchronous motor. This study will help to deepen our understanding and open mentality%作者在对新一代直流电动机( New DCM)的研究中发现并提出了直流旋转磁场这一电机学的新概念,是用换向控制器来控制电子换向器中功率开关管的导通状态及变化顺序,让通电直流电枢绕组磁势沿电枢表面圆周旋转而达到的.与交流旋转磁场一样,都是电枢绕组电路产生的磁势,它的旋转是由于电枢绕组线圈内电流瞬时值沿圆周分布变化引起的,与定转子机械相对运动没有关系.从转子的角度看电枢的旋转磁势是直流绕组电流还是交流绕组电流产生的并没有什么区别,所以对应不同的转子结构也能构成类似于交流同步电动机和交流异步电动机基本作用原理的电动机,又有所区别,出现了直流同步电动机和直流异步电动机的新概念和新名称.该文的研究有助于加深认识和开阔思路.
Fuzzy Auto-adjust PID Controller Design of Brushless DC Motor
Yuanxi, Wang; Yali, Yu; Guosheng, Zhang; Xiaoliang, Sheng
Using conventional PID control method, to guarantee the rapidity and small overshoot dynamic and static performance of the BLDCM (brushless DC motor) system is out of the question. The control method to combine fuzzy control with PID control was fit the multivariable strong coupling nonlinear characteristic of BLDCM system. Matlab/Simulink simulation model had been built. The result of computer simulation shows that, compared with the conventional PID controller, the dynamic and static performance of fuzzy auto-adjust PID controller are put forward to optimize. The research work of this paper has profound significance for high precision controller design.
Shaft Voltage and Life of Bearing electric-erosion for the Brushless DC Motor
Maetani, Tatsuo; Isomura, Yoshinori; Komiyama, Hiroshi; Morimoto, Shigeo
This paper describes the life of noise of bearing electro-erosion in the shaft voltage of brushless DC motors. We confirmed that shaft voltage is suppressed to equal to or less than the dielectric breakdown voltage of bearing lubricant in the insulated rotor proposed for suppression of shaft voltage. However, since bearing electro-erosion appears over time along with the deterioration of noise performance, the threshold of the shaft voltage to secure noise performance over long periods of time is necessary. Therefore, the threshold of the shaft voltage that influences the life of noise was obtained in acceleration tests.
Decentralized control of the COFS-I Mast using linear dc motors
Lindner, Douglas K.; Celano, Tom; Ide, Eric
1989-01-01
Consideration is given to a decentralized control design for vibration suppression in the COFS-I Mast using linear dc motors for actuators. The decentralized control design is based results from power systems using root locus techniques that are not well known. The approach is effective because the loop gain is low due to low actuator authority. The frequency-dependent nonlinearities of the actuator are taken into account. Because of the tendency of the transients to saturate the the stroke length of the actuator, its effectiveness is limited.
Stability Analysis of a Closed-Loop Control for a Pulse Width Modulated DC Motor Drive
GÜRBÜZ, Fatma; AKPINAR, Eyüp
2002-01-01
In this paper, the effect of the variation of amplitude and the chopping period of a PWM signal on the stability of a closed-loop control for a DC motor drive is investigated. First, the entire system is formulated as a Linear Quadratic (LQ) tracker with output feedback [1]. Then, stability analysis for the varying amplitude and the varying chopping period is carried out by the methods of root locus and the Jury test. Finally, stability limits obtained from a root locus and Jury tes...
Speed Digital Control of Brushless DC Motor Using dsPIC Controller
Gheorghe Băluţă; Gheorghe Ursanu
2014-01-01
This paper presents the digital control of the Brushless DC motor (BLDCM) speed. The dsPICDEM MC1 development system (with the dsPIC30F6010A microcontroller) and the dsPICDEM MC1L power module, manufactured by Microchip Company, were used. The control program was developed in C programming language. The graphical user interface was realized in LabVIEW 8.6 graphical programming language. For speed control, a digital controller PI type was implemented. Due to digital contro...
Optimal Gain Kalman Filter Design With Dc Motor Speed Controlled Parameters
Khalaf SalloumGaeid
2013-01-01
The aim of this work, to design an appropriate Kalman filter(KF) with optimal gain as well as a two degree of freedom compensator for the DC motor, verify the stability of the proposed algorithm and the noise sensitivity are carried out. The design of the present algorithm is to combine both 2DOFPID controller with the optimal gain obtained by designing a (KF) to obtain better performance. The sensor noise covariance has been precisely chosen to design of the (KF) through state space model of...
Energy Technology Data Exchange (ETDEWEB)
Saito, Y.; Tsunehiro, Y.; Yamamura, N. [Nagoya Inst. of Tech. (Japan)
1996-02-20
In respect of the construction of motor as the driving source of electric vehicle, there are two means as inverter-driving induction motors and DC brushless motors. Both of said means have the merits and demerits respectively as DC brushless motor has the excellent driving efficiency in low speed region and the advantage to deal with the trouble of inverter by the brake of power generation while the problems thereof are the filed-weakening control like induction motors is difficult in the practical use and a position sensor is necessary. In this paper, the electric vehicle are used as the object of the research for studying the construction and controlling method of brushless motor without position sensor, the control of the constant output in high speed region, and the starting as well as braking methods of the motor. Using current-source PWM inverter is the characteristic of this means. It is indicated by the comparative investigation with respect to the operating characteristics between the present means and the system using voltage-source inverter to the same synchronous machine that for the latter system the filter at the output side is indispensable and the values of the operating characteristics, efficiency, etc., in the brushless control are lower than those of the present means. 7 refs., 9 figs., 1 tab.
Analysis and Design of Conventional Controller for Speed Control of DC Motor -A MATLAB Approach
Directory of Open Access Journals (Sweden)
C. S. Linda
2015-02-01
Full Text Available The objective of this paper is to control the speed of the motor using conventional controller; compensator is used to improve the steady state error. To evaluate the performance of the controller, time response analysis is carried out. The time response analysis consists of two type of analysis. One is unit step response analysis and other is performance indices analysis. The paper describes the designing of a closed loop model of the dc motor drive for controlling speed. Accuracy and the dynamic responses are better in a closed loop system. The compensator is used to compensate the parameter of the system in such a way to meet the specification, so that it improves the steady state response of the system and get desired response.
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.
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.
LabVIEW FPGA Implementation Of a PID Controller For D.C. Motor Speed Control
Directory of Open Access Journals (Sweden)
Fakhrulddin H. Ali
2010-12-01
Full Text Available This Paper presents a novel hardware design methodology of digital control systems. For this, instead of synthesizing the control system using Very high speed integration circuit Hardware Description Language (VHDL, LabVIEW FPGA module from National Instrument (NI is used to design the whole system that include analog capture circuit to take out the analog signals (set point and process variable from the real world, PID controller module, and PWM signal generator module to drive the motor. The physical implementation of the digital system is based on Spartan-3E FPGA from Xilinx. Simulation studies of speed control of a D.C. motor are conducted and the effect of a sudden change in reference speed and load are also included.
Energy Technology Data Exchange (ETDEWEB)
Iwahori, M.; Kanda, J.; Oba, M. [Fuji Electric Co. Ltd., Tokyo (Japan)
1995-02-10
The VVVF (Variable Voltage Variable Frequency) inverter systems for motor drive in DC electric cars where a high breakdown voltage IGBT (Insulated Gate Bipolar Transistor) (2000 V, 400 A) was applied was developed. It consisted of the inverter unit, main electric motor, filter reactor, high-speed circuit breaker, isolator, etc. and had the following features. By individually controlling the torque of each electric motor, racing gliding control and axial weight move compensation control were executed for each electric motor to improve acceleration, etc. A high breakdown voltage IGBT achieving a high-frequency switching was applied and a 3-level inverter system was adopted, thus reducing voltage high harmonics and reducing noise. An electromagnetic operation system was adopted for the high-speed circuit breaker/contactor for achieving airless system, thus eliminating the need for maintenance. The circuit was simplified as compared with GTO by applying a high breakdown voltage IGBT and inverter efficiency was improved. The 3-level inverter system enable 2,000 V IGBT to be applied. The performance of each equipment was confirmed by the inertial load testing instrument. 4 refs., 8 figs., 1 tab.
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)
Ahmed M. Kassem
2012-05-01
Full Text Available A position control of DC motor servo drive based on the Sliding Mode (SM approach is presented. The modeling and analysis of the servo DC motor are obtained. The Sliding Mode Controller (SMC design changes such that its performance is substantially improved. To improve the controller performance in steady stat (zero error the Integral Sliding Mode Controller (ISMC is used. Since the main drawback of SMC is a phenomenon, the so-called chattering, resulting from discontinuous controllers. A ISMC with switched gains is used for chattering reduction and controller robustness. For comparison, the proposed ISM with switched gains is compared with that of a PID controller. Experiments and simulations have been carried out in order to validate the effectiveness of the proposed scheme. The proposed controller offers very good tracking; it is highly robust, reaches the final position very fast. Furthermore the application of the SM ensures reduction of the system order by one. Also, quick recovery from matched disturbance in addition to good tracking ability. Moreover, this scheme is robust against the parameters variations and eliminate the influence of modeling.
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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.
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Pritha Agrawal
2014-02-01
Full Text Available This paper presents a comparative analysis of speed control of brushless DC motor (BLDC drive fed with conventional two-level, three and five level diode clamped multilevel inverter (DC-MLI. The performance of the drive system is successfully evaluated using Fuzzy Logic (FL based speed controller. The control structure of the proposed drive system is described. The speed and torque characteristic of conventional two-level inverter is compared with the three and five-level multilevel inverter (MLI for various operating conditions. The three and five level diode clamped multilevel inverters are simulated using IGBT’s and the mathematical model of BLDC motor has been developed in MATLAB/SIMULINK environment. The simulation results show that the Fuzzy based speed controller eliminate torque ripples and provides fast speed response. The developed Fuzzy Logic model has the ability to learn instantaneously and adapt its own controller parameters based on disturbances with minimum steady state error, overshoot and rise time of the output voltage.
Energy Technology Data Exchange (ETDEWEB)
Konno, Y. [Shibaura Inst. of Tech., Tokyo (Japan); Nakano, K.
1997-07-15
The relationship of the output torque and power rate of the electric motor with the inertial moment and the mass of the motor is investigated, and the validity of the study is verified in reference to the specifications given in catalogs. Based on the result of the investigation, comparison with the characteristics of the hydraulic motor is carried out. Paying attention particularly to smaller size, lighter weight and accelerating performance of the AC and DC servomotors and the hydraulic motor, the relation among the data, rated values and performance of motors by the assumption based on the performance principle is exhibited to clarify the comparison of the performance. It is made clear that the relationships hold good with the catalog data of actual machines not only for DC motors but also for AC motors. In addition, similar relationships are obtained for the hydraulic motor, and it is made clear that they agree with the result of the investigation. The tendency of distribution based on the relationships among data, rated values and performance of motors obtained by inference is given in this report. 18 refs., 7 figs., 1 tab.
Praboo, N. N.; P.K. BHABA
2014-01-01
This paper deals with the design of Fractional Order Proportional Integral (FO-PI{\\lambda}) controller for the speed control of DC motor. A mathematical model of DC motor control system is derived and based on this model fractional order PI{\\lambda} controller is designed using stability boundary locus method to satisfy required gain margin (GM) and phase margin (PM) of the system. Servo and Regulatory tracking simulation runs are carried out for the speed control of DC motor. The performance...
Energy Technology Data Exchange (ETDEWEB)
Kano, Y.; Yamaguchi, M.; Sugawara, M. [Tokyo Univ. of Agriculture and Technology, Tokyo (Japan)
1997-08-20
The authors have been pursuing the possibility of using a two-dimensional de motor used for a driver of meal assist apparatus. In this paper, a new type dc surface motor using window shaped coils (DSM) is proposed by the authors. And the thrust equations of the DSM is shown following the exciting method of the window shaped coils. The driving characteristics of the DSM are summarized as follows: 1. The maximum flux density of the air gap is calculated at 0.35 teslas when the exciting current is 1.8 amperes. The flux density achieves only 20 % conpered with maximum flux density (1.8 teslas) of the yokes(SS41). 2. The thrust constant of the x-direction and y-direction are 2.93, 2.70 N/A respectively, so these difference is within only 8 %. And the maximum static thrust is over 5 newtons when the exciting current was 1.8 amperes. 3. It is recognized that the positioning control accuracy is good within 7.5 % when the DSM is controlled by PD-control method. 11 refs., 10 figs., 2 tabs.
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.
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)
Design and Simulation of a Soft Switched Dc Boost Converter for Switched Reluctance Motor
Directory of Open Access Journals (Sweden)
X. F. Joseph
2012-01-01
Full Text Available Problem statement: This study presents the design and simulation of a soft switched boost converter for a switched reluctance motor with a closed loop controller. A soft switching scheme is proposed in the converter with minimum components, which reduces the switching loss and stress across the switch so that the harmonic generation is reduced in the output. The switch used in this converter switched ON at zero current and switched OFF at zero voltage. Approach: Most of the research was done on the power converter circuit of the SRM to control the speed. But in the proposed system a soft switched boost converter was designed to regulate the input voltage to SRM for any line variations and a power converter is used to control the speed of SRM. The PI controller was used as closed loop controllers, which improves the speed control of the switched reluctance motor for any load and regulates the input voltage to SRM for any line variations. The duty cycle of the switch is controlled by PI controller using PWM technique. A 500W/50KHz PWM based soft switched boost converter was designed and simulated for 6/4 pole 3 phase SRM with variable loads. The results were simulated using MATLAB SIMULINK. Results: The output of the soft switched dc converter gives a constant output voltage for any line variations, so that the input voltage to SRM is constant. The output speed of the SRM is controlled using PI controller and rotor current. Conclusion: The soft switched dc converter regulates the input supply and a power converter control the speed of Switched reluctance motor simultaneously.
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。
Energy Technology Data Exchange (ETDEWEB)
Kunze, G.
2001-03-01
Separately excited d.c. motors have a wide speed control range and are well suited for driving machine tools, rolling machines and haulage systems. Inverse speed motors are found mainly in traction drives, vehicles, lifting gear, gyropumps and blowers but never in belt drives. [German] Der fremderregte Gleichstrommotor mit seinem grossen Drehzahlsteuerbereich eignet sich zum Antrieb von Werkzeugmaschinen, Walzenstrassen und Foerderanlagen. Den Reihenschlussmotor findet man hauptsaechlich in Traktionsantrieben, ferner in Fahrzeugen, Hebezeugen, Kreiselpumpen und Ventilatoren, keinesfalls aber in Riemenantrieben. (orig.)
A continually online-trained neural network controller for brushless DC motor drives
Energy Technology Data Exchange (ETDEWEB)
Rubaai, A.; Kotaru, R.; Kankam, M.D.
2000-04-01
In this paper, a high-performance controller with simultaneous online identification and control is designed for brushless dc motor drives. The dynamics of the motor/load are modeled online, and controlled using two different neural network based identification and control schemes, as the system is in operation. In the first scheme, an attempt is made to control the rotor angular speed, utilizing a single three-hidden-layer network. The second scheme attempts to control the stator currents, using a predetermined control law as a function of the estimated states. This schemes incorporates three multilayered feedforward neural networks that are online trained, using the Levenburg-Marquadt training algorithm. The control of the direct and quadrature components of the stator current successfully tracked a wide variety of trajectories after relatively short online training periods. The control strategy adapts to the uncertainties of the motor/load dynamics and, in addition, learns their inherent nonlinearities. Simulation results illustrated that a neurocontroller used in conjunction with adaptive control schemes can result in a flexible control device which may be utilized in a wide range of environments.
The Analysis of Vibration Due to Magnetic Exciting Force in the Brushless DC Motor
Energy Technology Data Exchange (ETDEWEB)
Han, Ki Jin [LG Innotek (Korea); Cho, Han Sam; Jung, Hyun Kyo [Seoul National University, Seoul (Korea)
2001-01-01
In this paper, the general research on the analysis of the vibration due to magnetic exciting force in the small brushless DC(BLDC) motor, which is used in the Digital Versatile Disk(DVD) ROM driving system, is performed. The first part of the study is the analysis of the magnetic exciting force in the air gap region. As a verification of the exciting force by numerical analysis, the magnetic exciting force distribution in the airgap region is computed by using Reluctance Network Method(RNM). In addition, thr effect of the eccentricity on the magnetic exciting force is discussed. The other part of the research is the structural analysis if the rotor structure of thr BLDC motor. The natural mode analysis of thr rotor structure is performed, and the vibration response due to magnetic exciting force is found. As a result of the procedures, the basic estimation of the effect of the magnetic exciting force on the vibration of BLDC motor is suggested. (author). 14 refs., 10 figs., 1 tab.
Development of a photo-voltaic pumping system using a brushless D.C. motor and helical rotor pump
Energy Technology Data Exchange (ETDEWEB)
Langridge, D.; Lawrance, W.; Wichert, B. [Curtin Univ. of Technology, Bentley (Australia)
1996-12-31
A PV pumping system based on a brushless d.c. motor and helical rotor pump has been designed, simulated and a prototype constructed. The paper describes the operation of the system and the development of component models for the array, the brushless d.c. motor and helical rotor pump. Simulation results and subsequent test results for the complete system are included. Efficiencies of between 30 and 50% for the system (excluding the array) have been achieved over a range of loads and operating conditions for 4 x 1 and 4 x 2 array configurations. 9 refs., 10 figs., 2 tabs.
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.
Design and Development of a Low Cost Scheme for Wireless Speed Control of a DC Motor using PWM
Directory of Open Access Journals (Sweden)
Reshma Sengupta
2014-10-01
Full Text Available This paper presents the design and development of a low cost scheme for the speed control of a dc motor with PWM technique using wireless technology, developed from first principles, i.e., without the use of commercial WSN platforms. The dc motor together with an RF transceiver module forms a remote wireless node, while another RF transceiver in conjunction with a PC forms the controlling node or base station. The minimal use of hardware keeps the cost low and the implementation simple yet rugged.
Design and Development of a Low Cost Scheme for Wireless Speed Control of a DC Motor using PWM
Reshma Sengupta; Sreeparna Dasgupta
2014-01-01
This paper presents the design and development of a low cost scheme for the speed control of a dc motor with PWM technique using wireless technology, developed from first principles, i.e., without the use of commercial WSN platforms. The dc motor together with an RF transceiver module forms a remote wireless node, while another RF transceiver in conjunction with a PC forms the controlling node or base station. The minimal use of hardware keeps the cost low and the implementation simple yet ru...
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.
Brush-Wheel Samplers for Planetary Exploration
Rivellini, Tommaso
2003-01-01
A report proposes brush-wheel mechanisms for acquiring samples of soils from remote planets. In simplest terms, such a mechanism would contain brush wheels that would be counter-rotated at relatively high speed. The mechanism would be lowered to the ground from a spacecraft or other exploratory vehicle. Upon contact with the ground, the counter-rotating brush wheels would kick soil up into a collection chamber. Thus, in form and function, the mechanism would partly resemble traditional street and carpet sweepers. The main advantage of using of brush wheels (in contradistinction to cutting wheels or other, more complex mechanisms) is that upon encountering soil harder than expected, the brushes could simply deflect and the motor(s) could continue to turn. That is, sufficiently flexible brushes would afford resistance to jamming and to overloading of the motors used to rotate the brushes, and so the motors could be made correspondingly lighter and less power hungry. Of course, one could select the brush stiffnesses and motor torques and speeds for greatest effectiveness in sampling soil of a specific anticipated degree of hardness.
A DC-Voltage-Balancing Circuit for a Five-Level Diode-Clamped PWM Inverter Intended for Motor Drives
Hasegawa, Kazunori; Akagi, Hirofumi
This paper proposes a new dc-voltage-balancing circuit for a five-level diode-clamped inverter intended for a medium-voltage motor drive. This circuit consists of two unidirectional choppers and a single coupled inductor with two galvanically-isolated windings. The dc magnetic fluxes in the magnetic core, which are generated by the two windings, cancel out each other. Therefore, the inductor does not generate any dc-magnetic flux in the magnetic core. This makes the inductor compact by a factor of six compared to previously used balancing circuits containing two non-coupled inductors. Experimental results obtained from a 200-V 5.5-kW downscaled model verify that the dc mean voltages of the four split dc capacitors are balanced well under all operating conditions.
Ureteral retrograde brush biopsy
Biopsy - brush - urinary tract; Retrograde ureteral brush biopsy cytology; Cytology - ureteral retrograde brush biopsy ... to be biopsied is rubbed with the brush. Biopsy forceps may be used instead to collect a ...
Design of a Neuro-Fuzzy Controller for Speed Control Applied to DC Servo Motor
Energy Technology Data Exchange (ETDEWEB)
Kim, S.H.; Kang, Y.H.; Kim, L.K. [Konkuk University, Seoul (Korea); Ko, B.W. [Cheju College of Technology, Cheju (Korea)
2002-02-01
In this study, a neuro-fuzzy controller which has the characteristic of fuzzy control and artificial neural network is designed. A fuzzy rule to be applied is automatically selected by the allocated neurons. The neurons correspond to fuzzy rules are created by an expert. To adapt the more precise model is implemented by error back-propagation learning algorithm to adjust the link-weight of fuzzy membership function in the neuro-fuzzy controller. The more classified fuzzy rule is used to include the property of dual mode method. In order to verify the effectiveness of the proposed algorithm designed above, an operating characteristic of a DC servo motor with variable load is investigated. (author). 10 refs., 12 figs., 9 tabs.
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.
Design and Dynamic Analysis of Air-core Coil type Linear DC Motor
Energy Technology Data Exchange (ETDEWEB)
Kang, Gyu Hong; Hong, Jung Pyo; Kim, Gyu Tak [Chang Won National University (Korea); Ha, Kyeun Su; Jung, Joong Gi; Im, Tae Bin [Korea Electronics Technology Institute (Korea)
2000-03-01
This paper proposes a technique to design of air-core coil type Linear DC Motor(LDM) by using Equivalent Magnetizing Current(EMC) method and has performed its dynamic analysis. The magnetic flux density differ in accordance with airgap position due to the difference of mechanical and magnetic air gap length and the coil shape has an influence on the thrust. Therefore, the analysis of magnetic field due to the magnets is carried out by EMC. The phenomena according to the various coil shape under the same Magneto Motive Force(MMF) has been analyzed and its result is applied to the design process. The appropriateness of the proposed technique is confirmed by Finite Element Method(FEM) and its dynamic analysis is carried out from the coupling of the electrical circuit equation and mechanical kinetic equation. (author). 8 refs., 13 figs., 2 tabs.
Design for CMAC Neural Network Speed Controller of DC Motor by Digital Simulations
Energy Technology Data Exchange (ETDEWEB)
Choi, Kwang Ho [Keon-A Information Technology Co., Ltd. (Korea); Cho, Yong Beom [Konkuk University (Korea)
2001-06-01
In this paper, we propose a CMAC(Cerebellar Model Articulation Controller) neural network for controlling a non-linear system. CMAC is a neural network that model the human cerebellum. CMAC uses a table look-up method to resolve the complex non-linear system instead of numerical calculation method. It is very fast learn compared with other neural networks. It does not need a calculation time to generation time to generate control signals. The simulation results show that the proposed CMAC controllers for a simple non-linear function and a DC Motor speed control reduce tracking errors and improve the stability of its learning controllers. The validity of the proposed CMAC controller is also proved by the real-time tension control. (author). 10 refs., 15 figs., 3 tabs.
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.
High-Density EMI Filter Design for DC-Fed Motor Drives
Energy Technology Data Exchange (ETDEWEB)
Lai, Rixin [General Electric; Maillet, Yoann [Virginia Polytechnic Institute and State University (Virginia Tech); Wang, Shuo [ORNL; Wang, Fei [ORNL; Burgos, Rolando [ABB; Boroyevich, Dushan [Virginia Polytechnic Institute and State University (Virginia Tech)
2010-01-01
This paper presents strategies to reduce both differential-mode (DM) and common-mode (CM) noise using a passive filter in a dc-fed motor drive. The paper concentrates on the type of grounding and the components to optimize filter size and performance. Grounding schemes, material comparison between ferrite and nanocrystalline cores, and a new integrated filter structure are presented. The integrated structure maximizes the core window area and increases the leakage inductance by integrating both CM and DM inductances onto one core. Small-signal and large-signal experiments validate the structure, showing it to have reduced filter size and good filtering performance when compared with standard filters at both low and high frequencies.
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.
Design and Implementation of Fuzzy Logic system for DC motor Speed Control
Directory of Open Access Journals (Sweden)
Maan M. Shaker
2010-12-01
Full Text Available In this paper an integrated electronic system has been designed, constructed and tested. The system utilizes an interface card through the parallel port in addition to some auxiliary circuits to perform fuzzy control operations for DC motor speed control with load and no load. Software is written using (C++ language Ver. 3.1 to display the image as control panel for different types of both conventional and fuzzy control. The main task of the software is to simulate: first, how to find out the correct parameters for fuzzy logic controller (membership’s function, rules and scaling factor. Second, how to evaluate the gain factors (KP, KI and KD by Ziegler-Nichols method. When executing any type of control process the efficiency is estimated by drawing the relative speed response for this control.
Optimal Design of PID Controller for the Speed Control of DC Motor by Using Metaheuristic Techniques
Directory of Open Access Journals (Sweden)
Mirza Muhammad Sabir
2014-01-01
Full Text Available DC motors are used in numerous industrial applications like servo systems and speed control applications. For such systems, the Proportional+Integral+Derivative (PID controller is usually the controller of choice due to its ease of implementation, ruggedness, and easy tuning. All the classical methods for PID controller design and tuning provide initial workable values for Kp, Ki, and Kd which are further manually fine-tuned for achieving desired performance. The manual fine tuning of the PID controller parameters is an arduous job which demands expertise and comprehensive knowledge of the domain. In this research work, some metaheuristic algorithms are explored for designing PID controller and a comprehensive comparison is made between these algorithms and classical techniques as well for the purpose of selecting the best technique for PID controller design and parameters tuning.
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.
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.
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.)
SPEED CONTROL OF BRUSHLESS DC MOTOR ON RESONANT POLE INVERTER USING FUZZY LOGIC CONTROLLER
Directory of Open Access Journals (Sweden)
S. Sivakotiah
2011-10-01
Full Text Available Brushless dc motor has been widely used in drive system and servo control because of its fast response ,high density ,high efficiency ,low inertia ,high reliability ,maintenance free. It is however driven by a hard switching frequency, high switching losses, high electromagnetic interference, high acoustic noise and low efficiency. The rectifier/inverter with a simple commutation circuit to provide zero voltage turn on for the switches and soft turn off for diodes. The converter is intended for high performance, medium power applications requiring bidirectional power flow .A new soft switching inverter has been developed to overcome over voltages and over current problems existing resonant link inverter .This inverter employs a single auxiliary switches. The introduces fuzzy logic based soft switching resonant pole inverter using transformer, which can generates dc link voltages notches during chopping which an minimized the drawback of soft switching, The operation principle and control scheme of the inverter are analyzed and performance of the fuzzy controller is compared with conventional PI controller .The simulation result show that the fuzzy controller is compared with the conventional PI controller.
Directory of Open Access Journals (Sweden)
SANJEEV SINGH
2010-12-01
Full Text Available Permanent magnet brushless DC motor (PMBLDCM drives are being employed in many variable speed applications due to their high efficiency, silent operation, compact size, high reliability, ease of control, and low maintenance requirements. These drives have power quality problems and poor power factor at input AC mains as they are mostly fed through diode bridge rectifier based voltage source inverters. To overcome such problems a single-phase single-switch power factor correction AC-DC converter topology based on a Cuk converter is proposed to feed voltage source inverters based PMBLDCM. It focuses on the analysis, design and performance evaluation of the proposed PFC converter topology for a 1.5 kW, 1500 rpm, 400 V PMBLDCM drive used for an air-conditioning system. The proposed PFC converter topology is modelled and its performance is simulated in Matlab-Simulink environment and results show an improved power quality and good power factor in wide speed range of the drive.
Optimal Control for Single-Phase Brushless DC Motor with Hall Sensor
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Dawei Meng
2013-02-01
Full Text Available This study deals with the optimization control of a single-phase brushless DC motor (BLDCM with Hall sensor. A simple modeling method with feasible parameter identification is adopted to meet characteristics of single-phase BLDCM. With the linear Hall sensor feedback, the advantages of current-mode control scheme and soft-commutation scheme are proposed to achieve maximum efficiency over the entire speed range. This thesis also develops a low-cost and high efficiency control for single-phase BLDCM. The hardware test platform has been constructed on a single-chip Field Programmable Gate Array (FPGA of Cyclone II Family of Altera to verify the performance and feasibility of the proposed optimization control strategies. When using the control scheme with Hall sensor, experimental results show that there are at least a 10% improvement for average value of dc-link current, a 10% improvement for RMS value of phase current and a 40% improvement for peak value of phase current.
Off-line tuning of a PI speed controller for a permanent magnet brushless DC motor using DSP
International Nuclear Information System (INIS)
In this paper, a new method of tuning Proportional Integral (PI) coefficients for a permanent magnet brushless DC (PMBLDC) motor drives is proposed. Artificial neural network is used to identify the whole system using maximum overshoot and settling time obtained from the application circuit for different Kp-Ki pairs. Optimal values of PI controller coefficients are obtained using genetic algorithm. Motion Control Kit (MCK243) is used to carry out digital motion control applications. The MCK243 kit includes a power module and a three-phase brushless motor. TMS320F243 programs are used for PMBLDC motor speed control. Experimental results are given to show the validity of this method.
SANITA C S, J T KUNCHERIA
2013-01-01
Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vital- The motor is operated in four steady state operating modes of torque-speed plane. To control a BLDC machine it is generally required to measure the speed and position of rotor by using the sensor because the inverter phases, acting at any time, must be commutated depending on the rotor position. Simulation of the proposed m...
PC based speed control of dc motor using fuzzy logic controller
Energy Technology Data Exchange (ETDEWEB)
Mandal, S.K.; Kanphade, R.D.; Lavekar, K.P.
1998-07-01
The dc motor is extensively used as constant speed drive in textile mills, paper mills, printing press, etc.. If the load and supply voltage are time varying, the speed will be changed. Since last few decades the conventional PID controllers are used to maintain the constant speed by controlling the duty ratio of Chopper. Generally, four quadrant chopper is used for regenerative braking and reverse motoring operation. Fuzzy Logic is newly introduced in control system. Fuzzy Control is based on Fuzzy Logic, a logical system which is too much closer in spirit to human thinking and natural language. The Fuzzy Logic Controller (FLC) provides a linguistic control strategy based on knowledge base of the system. Firstly, the machine is started very smoothly from zero to reference speed in the proposed scheme by increasing the duty ratio. Then change and rate of change of speed (dN, dN/dt), change and rate of change input voltage (dV, dV/dt) and load current are input to FLC. The new value of duty ratio is determined from the Fuzzy rule base and defuzzification method. The chopper will be 'ON' according to new duty ratio to maintain the constant speed. The dynamic and steady state performance of the proposed system is better than conventional control system. In this paper mathematical simulation and experimental implementation are carried out to investigate the drive performance.
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.
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…
Influence of design parameters on the starting torque of a single-phase PM brushless DC motor
Bentouati, S.; Zhu, Z.Q.; Howe, D.
2000-01-01
The starting torque of a single-phase permanent magnet brushless DC motor is investigated, for both radial and parallel magnetization. Finite element analysis is used to assess the relative merits of alternative methods of introducing the required air gap asymmetry, viz. tapered air gap, stepped air gap, asymmetric air gap, and slotted teeth. The predicted results are validated experimentally
Czech Academy of Sciences Publication Activity Database
Klíma, J.; Chomát, Miroslav; Schreier, Luděk
2008-01-01
Roč. 2, č. 6 (2008), s. 341-352. ISSN 1751-8660 R&D Projects: GA ČR GA102/08/0424 Institutional research plan: CEZ:AV0Z20570509 Keywords : DC-link voltage pulsations * torque ripple * induction motor Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering Impact factor: 0.660, year: 2008
Directory of Open Access Journals (Sweden)
Hadeed Ahmed Sher
2016-07-01
Full Text Available Induction motors are widely used in industrial power plants due to their robustness, reliability and high performance under variable operating conditions in the electrical power system. Modern industrial progress is dependent on these ruggedly constructed induction motors. Almost every sophisticated process of the industry is based on induction motors. Most of these motors are controlled by means of inverters that change the line frequency. The change in parameters of inverter makes it possible to control the motor according to the design requirements. The reliability of inverter based motor control is an important issue for industrial applications and therefore, it becomes very vital for design engineers to have comprehensive analysis of the inverter fed induction machine. This paper investigates one of the faults that may occur on the DC link of an inverter fed induction motor. The effect of the capacitor short circuit is presented in this paper. It also deals with the effects of short circuited capacitor on freewheeling diode. DC link capacitors are well designed and even the probability of capacitor failure is high, it is always a rare case if they puncture, however this analysis will add to the reliability of the induction machine under variable operating condition.
Comparative Study of Controller Design for Four Quadrant Operation of Three Phase BLDC Motor
Directory of Open Access Journals (Sweden)
Ms.K.Suganya*1
2014-03-01
Full Text Available Brushless DC motor drives are becoming more popular in industrial and traction applications. The control of BLDC motor in four quadrants is very vital. The three-phase permanent magnet brushless dc motor inherently needs an electronic commutation circuit to drive it, because it is not a self-commutating motor. It is contrary to the conventional brush motor which commutates itself. This paper presents a comparison study of three type of control such as PI, PID & fuzzy. The characteristics of the three control methods are investigated intensely and the advantages, disadvantages of each are compared to the others with the help of MATLAB simulink software.
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.
Energy Technology Data Exchange (ETDEWEB)
Liutanakul, Pisit [Faculty of Engineering, Department of Electrical Engineering, King Mongkut' s University of Technology North Bangkok, 1518 Phiboonsongkram Road, Bangsue, Bangkok 10800 (Thailand); Institut National Polytechnique de Lorraine (INPL), GREEN, CNRS (UMR 7037) 2, Avenue de la Foret de Haye, 54516 Vandoeuvre-les-Nancy (France); Pierfederici, Serge; Meibody-Tabar, Farid [Institut National Polytechnique de Lorraine (INPL), GREEN, CNRS (UMR 7037) 2, Avenue de la Foret de Haye, 54516 Vandoeuvre-les-Nancy (France)
2008-12-15
The necessity of the converters compactness in many applications imposes the reduction of their different components size when it is possible. In this paper, a control method allowing the use of a small size dc-link capacitor for the cascade of voltage controlled-rectifier/inverter-motor drive system is proposed. This is achieved by adding the power balance equation in the system's model and the application of an exact input/output feedback linearization technique in a way that the rectifier controller compensates any sudden change in the inverter load, which is here an induction motor. Since the exact input/output feedback linearization technique is sensitive to the uncertainties over system parameters, a robust control strategy based on sliding mode controller is proposed. By this approach, the dc-link voltage becomes almost insensitive to the load variations. As a result, the level of the dc-link voltage could be stabilized with a small size dc-link capacitor. Without any considerations of the RMS current stress on this dc-link capacitor, a calculation method of a minimum value of this capacitor based on its storage energy is proposed. All the investigations are shown by computer simulations and the performance of controlled system is verified by experimentation results. (author)
International Nuclear Information System (INIS)
The necessity of the converters compactness in many applications imposes the reduction of their different components size when it is possible. In this paper, a control method allowing the use of a small size dc-link capacitor for the cascade of voltage controlled-rectifier/inverter-motor drive system is proposed. This is achieved by adding the power balance equation in the system's model and the application of an exact input/output feedback linearization technique in a way that the rectifier controller compensates any sudden change in the inverter load, which is here an induction motor. Since the exact input/output feedback linearization technique is sensitive to the uncertainties over system parameters, a robust control strategy based on sliding mode controller is proposed. By this approach, the dc-link voltage becomes almost insensitive to the load variations. As a result, the level of the dc-link voltage could be stabilized with a small size dc-link capacitor. Without any considerations of the RMS current stress on this dc-link capacitor, a calculation method of a minimum value of this capacitor based on its storage energy is proposed. All the investigations are shown by computer simulations and the performance of controlled system is verified by experimentation results
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....... reduction techniques are investigated, and the effectiveness of chattering suppression for current regulation of PM DC drives is tested. The sampling rate was also examined to determine how it affects the amplitude of chattering. This paper concentrates on various combinations of observer-based methods in...
Energy Technology Data Exchange (ETDEWEB)
Chen, Z.; Doki, S.; Okuma, S. [Nagoya University, Nagoya (Japan); Tomita, M. [Gifu National College of Technology, Gifu (Japan); Senju, t. [University of the Ryukyus, Okinawa (Japan)
1998-07-01
The equation of brushless dc motors is nonlinear, to which linear control theories are difficult to apply. In this paper, firstly, a disturbance observer to estimate rotor positions is proposed. By assuming the non-linear term of the e.m.f. as a kind of disturbance, the model of the brushless dc motors becomes a linear one so that the disturbance observer can be applied. Secondly, a velocity estimator using the e.m.f. estimated by the disturbance observer is proposed. The observer and estimator are 2nd-order, systems. Thus they are simple and easy for tuning. Their pole assignments and influences of parameter deviations are also discussed. The experimental results show that the proposed method is valid. 7 refs., 14 figs., 2 tabs.
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.
Kar, Subhajit; Sharma, Kaushik Das
2010-10-01
System identification is a ubiquitous necessity for successful applications in various fields. The area of system identification can be characterized by a small number of leading principles, e.g. to look for sustainable descriptions by proper decisions in the triangle of model complexity, information contents in the data, and effective validation. Particle Swarm Optimization (PSO) is a stochastic, population-based optimization algorithm and many variants of PSO have been developed since, including constrained, multi objective, and discrete or combinatorial versions and applications have been developed using PSO in many fields. The basic PSO algorithm implicitly utilizes a fully connected neighborhood topology. However, local neighborhood models have also been proposed for PSO long ago, where each particle has access to the information corresponding to its immediate neighbors, according to a certain swarm topology. In this local neighborhood model of PSO, particles have information only of their own and their nearest neighbors' bests, rather than that of the entire population of the swarm. In the present work basic PSO method and two of its local neighborhood variants are utilized for determining the optimal parameters of a dc motor. The result obtain from the simulation study demonstrate the usefulness of the proposed methodology.
Energy Technology Data Exchange (ETDEWEB)
Kara, Tolgay E-mail: kara@gantep.edu.tr; Eker, Ilyas
2004-05-01
Modeling and identification of mechanical systems constitute an essential stage in practical control design and applications. Controllers commanding systems that operate at varying conditions or require high precision operation raise the need for a nonlinear approach in modeling and identification. Most mechanical systems used in industry are composed of masses moving under the action of position and velocity dependent forces. These forces exhibit nonlinear behavior in certain regions of operation. For a multi-mass rotational system, the nonlinearities, like Coulomb friction and dead zone, significantly influence the system operation when the rotation changes direction. The paper presents nonlinear modeling and identification of a DC motor rotating in two directions together with real time experiments. Linear and nonlinear models for the system are obtained for identification purposes, and the major nonlinearities in the system, such as Coulomb friction and dead zone, are investigated and integrated in the nonlinear model. The Hammerstein nonlinear system approach is used for identification of the nonlinear system model. Online identification of the linear and nonlinear system models is performed using the recursive least squares method. Results of the real time experiments are graphically and numerically presented, and the advantages of the nonlinear identification approach are revealed.
International Nuclear Information System (INIS)
Modeling and identification of mechanical systems constitute an essential stage in practical control design and applications. Controllers commanding systems that operate at varying conditions or require high precision operation raise the need for a nonlinear approach in modeling and identification. Most mechanical systems used in industry are composed of masses moving under the action of position and velocity dependent forces. These forces exhibit nonlinear behavior in certain regions of operation. For a multi-mass rotational system, the nonlinearities, like Coulomb friction and dead zone, significantly influence the system operation when the rotation changes direction. The paper presents nonlinear modeling and identification of a DC motor rotating in two directions together with real time experiments. Linear and nonlinear models for the system are obtained for identification purposes, and the major nonlinearities in the system, such as Coulomb friction and dead zone, are investigated and integrated in the nonlinear model. The Hammerstein nonlinear system approach is used for identification of the nonlinear system model. Online identification of the linear and nonlinear system models is performed using the recursive least squares method. Results of the real time experiments are graphically and numerically presented, and the advantages of the nonlinear identification approach are revealed
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.
International Nuclear Information System (INIS)
Field orientation control of induction machine (IM) drives is a well-known strategy which has a fast dynamic response. In this paper, the direct rotor flux field orientation control of speed sensorless IM drive is presented. A two level space vector modulation inverter is employed to generate the command stator voltage. In proposed control scheme, a maximum torque per ampere strategy is achieved using a so-called fast flux search method. Based on this method, for a given load torque and rotor speed, the magnitude of rotor reference flux is adjusted step by step until the effective value of stator current becomes minimized finally. In addition, using the IM fifth order model in the stationary reference frame, a nonlinear rotor flux observer is developed which is also capable of motor resistances and rotor speed simultaneously estimation. Moreover, a useful method is introduced for dc offset compensation which is a major problem of ac drives especially at low speeds. The proposed control idea is experimentally implemented in real time using a CPLD board synchronized with a personal computer. Simulation and experimental results are finally presented to confirm the validity and effectiveness of the proposed method.
Development of a Practical Low-Cost µC based Brushless DC Motor Controller using Proteus
Y. L. Karnavas; Ch. L. Liagkos
2012-01-01
Simulation, design and prototype construction of a low cost three phase permanent magnet (PM) brushless DC (BLDC) motor controller for low power applications is studied in this paper. The drive circuitry is based on the PIC16F877A microcontroller (µC), which –among others- performs pulse width modulation (PWM) control for a 6-step, 120-degree trapezoidal PM BLDC motor drive. The specific processor is a widely used one and its characteristics are judged excellent in conjunction with its low c...
Eriksson, Emil
2014-01-01
The goal of this project is to design and simulate the electromagnetic circuit of a brushless dc motor meant to be used in a remote operated underwater vehicle. The final product is a drawing, see appendix A & B, of the design and the most relevant parameters are: R = 0.94 ohm and L =1.18mH per phase; at 250 rpm the motor produces 478.8W of power and 18.3Nm of torque at a line voltage of 78.8V rms and a current of 4A. The losses are estimated to 55W, but will likely be higher. Further stu...
Directory of Open Access Journals (Sweden)
Saswati Swapna Dash
2014-07-01
Full Text Available This paper presents an overall study of Feedback Control of Z-Source Converter Fed Separately excited DC motor with centrifugal Pump Set. Z-source converter can be used for both voltage buck and boost mode using LC impedance network. In this paper the dynamic modeling of Z-source with motor load and centrifugal pump set is carried out with new findings. The compensators for speed feedback loop are designed by taking average state space analysis and small signal model of the system. The feedback loop is designed by classical control methods. The experiment is done in MATLAB work environment and the result is verified by Simulation.
Saswati Swapna Dash; Byamakesh Nayak; Subrat Kumar
2014-01-01
This paper presents an overall study of Feedback Control of Z-Source Converter Fed Separately excited DC motor with centrifugal Pump Set. Z-source converter can be used for both voltage buck and boost mode using LC impedance network. In this paper the dynamic modeling of Z-source with motor load and centrifugal pump set is carried out with new findings. The compensators for speed feedback loop are designed by taking average state space analysis and small signal model of the system. The feedba...
Energy Technology Data Exchange (ETDEWEB)
Kang, Y.H.; Kim, L.K. [Konkuk University, Seoul (Korea)
2002-06-01
We designed a neuro-fuzzy controller to improve some problems that are happened when the DC servo motor is controlled by a PID controller or a fuzzy logic controller. Our model proposed in this paper has the stable and accurate responses, and shortened settling time. To prove the capability of the neuro-fuzzy controller designed in this paper, the proposed controller is applied to the speed control of DC servo motor. The results showed that the proposed controller did not produce the overshoot, which happens when PID controller is used, and also it did not produce the steady state error when FLC is used. And also, it reduced the settling time about 10%. In addition, we could be aware that our model was only about 60% of the value of current peak of PID controller. (author). 10 refs., 9 figs., 5 tabs.
Real-Time Control of a DC Servo Motor with Variable Load Using PID-Learning Controller
Energy Technology Data Exchange (ETDEWEB)
Kim, S. H. [Halla University, Wonju (Korea); Chung, I. S.; Kang, Y. H.; Nam, M. H.; Kim, L. K. [Konkuk University, Seoul (Korea)
2001-03-01
This paper deals with speed control of DC servo motor using a PID controller with a gain tuning based on a Back-Propagation(BP) Learning Algorithm. Conventionally a PID controller has been used in the industrial control. But a PID controller should produce suitable parameters for each system. Also, variables of the PID controller should be changed according to environment, disturbance and loads. In this paper described by a experiment that contained a method using a PID controller with a gain tuning based on a Back-Propagation(BP) Learning Algorithm, we developed speed characteristics of a DC servo motor on variable loads. The parameters of the controller are determined by neural network performed on on-line system after training the neural network on off-line system. (author). 15 refs., 14 figs., 5 tabs.
International Nuclear Information System (INIS)
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 concepts are joined together in a simple and enjoyable experiment that allows the students to demonstrate physics at first hand and without the use of complex materials
Rahat Ullah Khan,; Mohd. Arif Khan,; Huma Arjumand
2010-01-01
In this paper an innovative technique is proposed to run a DC series motor and converting it into D C separately excited as and when required to do regenerative braking and controlling a loaded car. In this scheme we are proposing on alternate energy source for driving the car i.e. solar PV Cell based battery charging system. The implication, basic concept and limitations of this concept are discussed. Also the mode of operations including analysis and operating conditions is also discussed. ...
International Nuclear Information System (INIS)
Anti-control of chaos of single time scale brushless dc motors (BLDCM) and chaos synchronization of different order systems are studied in this paper. By addition of an external nonlinear term, we can obtain anti-control of chaos. Then, by addition of the coupling terms, by the use of Lyapunov stability theorem and by the linearization of the error dynamics, chaos synchronization between a third-order BLDCM and a second-order Duffing system are presented
Raquib, Ahmed; Brian, D’ Rozario
2011-01-01
In today’s world, technology is evolving fast and with expensive and complicated equipments we are able to achieve greater accuracy. This paper presents a simplified and an inexpensive model for replacing more complicated feedback systems like optical encoder using a laser unit, a Light Dependent Resistor (LDR) and a microcontroller in an environment where very high accuracy is not required. Usually it is very difficult to control the speed of a DC motor since it varies with the supplied ...
V. M. Varatharaju; Badrilal Mathur; Udhayakumar
2011-01-01
Problem statement: The tuning methodology for the parameters of adaptive speed controller causes a transient deviation of the response from the set reference following variation in load torque in a permanent-magnet brushless DC (BLDC) motor drive system. Approach: This study develops a mathematical model of the BLDC drive system, firstly. Secondly, discusses a design of the closed loop drive system employing the Adaptive-Network-based Fuzzy Interference System (ANFIS). The nonlinear simulatio...
Шавёлкин, Александр Алексеевич; Герасименко, Виталий Анатольевич; Кожемякин, Сергей Михайлович
2015-01-01
Most part of the tram park of Ukraine uses energy-intensive traction electric drive with DC motors with series excitation with rheostat control. The purpose of work is development circuit design of the traction unit on the IGBT, ensures minimum power consumption and the cost of the modernization of trams that are not exhausted their resource. Objectives: reducing the number of power semiconductors in the scheme, the development of electric drive control system and the mathematical model of th...
Energy Technology Data Exchange (ETDEWEB)
Kitamura, S. [Kusatsu Electric Co. Ltd., Shiga (Japan); Ishihara, Y.; Todaka, T. [Doshisha University, Kyoto (Japan)
1998-02-01
In this paper, we propose an analytical method for a motor with skewed magnets. In our proposal method, a motor is divided into the some segments, and then the sum of the induced voltage of each segments are coupled with the circuit equation, so that it becomes possible for 2-D FEM to take skewed effects into account. The proposed method has been applied to the analysis of DC Blushless Motor. Calculated results of induced voltage waveforms on no-load show close agreement with measured values. In addition the results of winding current waveforms and average torque vs. speed characteristics in steady state indicate good results. These results confirmed the validity of this method. 9 refs., 19 figs.
Niemann, J; Winker, T; Gerling, J; Landwehrmeyer, B; Jung, R
1991-01-01
To study whether electrophysiological correlates of increasing motor skill can be demonstrated in man, we recorded cortical negative DC-potentials during the acquisition of a complex finger movement in 21 subjects. The movement consisted in moving a matchstick to and fro between the index finger (II) and the little finger (V). Cortical negative DC-potentials were recorded at Fz, Cz, C1, C2 and Pz. As a control a simple finger movement was performed during the same session by 7 of the Ss. Both tasks were repeated 60-80 times and averages of the first and the last 15 artifact-free single runs were compared. Whereas only a slight, inconstant decrease in surface electronegativity during the simple motor task was observed, a significant reduction in potential size occurred during the complex task at Cz (maximum), C1, C2 and Pz but not at Fz. In addition, a significant difference in the decrease of surface electronegativity between various electrode positions was observed. We suggest that these changes in potential size during the process of motor learning may reflect an altered cortical organisation of movement control during the acquisition of a complex motor task. PMID:1893989
Synthesis and design of a variable structure controller for a DC motor speed control
Energy Technology Data Exchange (ETDEWEB)
Marcano-Gamero, C.R. [Los Andes Univ., Bogota (Colombia). Dept. of Electronic Engineering]|[Universidad Nacional Experimental Politecnica, Puerto Ordaz (Venezuela). Dept. of Electronic Engineering
2006-07-01
A Matlab digital simulation using the Simulink toolbox was used to compare the behaviour of a physical plant operating under a variable structure system (VSS) against the behaviour of the same plant operating under a conventional controller. The study was initiated to examine the application of VSCs in the field of robotics, where fast response and establishment times are required. A variable structure controller (VSC) was synthesized and designed to control a DC motor with an associated load. Basic concepts introduced by V Utkin were used in the synthesis and design process of the VSS. Krassowsky's optimization of a performance criterion was also applied. Both systems reverberate the integral of error between the designated reference and the measured value m-file of the controlled variable. The results confirm a significant reduction in response and settling times, and a weakening of the overshoot due to commutation between various structures of the VSS. This compels the system to enter into the sliding mode trajectory until it reaches a new operation point. The overall resulting system was hardly influenced by external disturbances in the controlled plant. It demonstrated a very quick response to reference changes, suggesting a superior reliability in tracking the input signal. VSCs were found to be influenced by different continuous structures which are commuted by a switching logic based on a subsystem that is government by a state variables linear combination known as sliding hyperplane. The VSS control law refers to the switching between 2 or more controllers, which separately could drive the plant to an unstable behaviour. However, when acting in an alternate manner, they can improve response time, settling time, and maximum overshoot. The phase trajectories of a plant under VSS control are referred to as sliding modes. Input signal tracking was found to be more accurate with VSC than with the proportional controller. It was concluded that the use of
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.
Diagnostics of DC and Induction Motors Based on the Analysis of Acoustic Signals
Directory of Open Access Journals (Sweden)
Glowacz A.
2014-10-01
Full Text Available In this paper, a non-invasive method of early fault diagnostics of electric motors was proposed. This method uses acoustic signals generated by electric motors. Essential features were extracted from acoustic signals of motors. A plan of study of acoustic signals of electric motors was proposed. Researches were carried out for faultless induction motor, induction motor with one faulty rotor bar, induction motor with two faulty rotor bars and flawless Direct Current, and Direct Current motor with shorted rotor coils. Researches were carried out for methods of signal processing: log area ratio coefficients, Multiple signal classification, Nearest Neighbor classifier and the Bayes classifier. A pattern creation process was carried out using 40 samples of sound. In the identification process 130 five-second test samples were used. The proposed approach will also reduce the costs of maintenance and the number of faulty motors in the industry.
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.
Ahmed Sabah Al-Araji
2014-01-01
In this paper, the speed control of the real DC motor is experimentally investigated using nonlinear PID neural network controller. As a simple and fast tuning algorithm, two optimization techniques are used; trial and error method and particle swarm optimization PSO algorithm in order to tune the nonlinear PID neural controller's parameters and to find best speed response of the DC motor. To save time in the real system, a Matlab simulation package is used to carry out these algorithms to tu...
Energy Technology Data Exchange (ETDEWEB)
Kasa, N.; Watanabe, H. [Tokyo Metropolitan Institute of Technology, Tokyo (Japan)
1998-02-01
For sensorless controlled salient-pole brushless DC motor drives, a new AC current injection method which estimates the position angle with d and q inductances was proposed. However, the estimated position angles include the errors which are casued by an unsymmetrical construction based on the mechanical or magnetic tolerance on the motor. It is difficult to correct the errors with hardwares like filters. An error correcting technique of an estimated position angle and rotating speed is proposed. The errors which are casued by the unsymmetrical construction appear as a modeling error of the motor periodically. Then, a neuro-like fuzzy technique can be applied to correct the error of the estimated position angle. When the motor is controlled at a commanded speed, the speed of the motor contains unexpected cyclic speed errors. The fuzzy model which estimates these errors is learned with a back propagation method which uses the cyclic errors as a teacher signal. Then, the system corrects the estimated position angles with the estimated errors. From the experimental results, the proposed sensorless control system could estimate more accurate position angle than conventional systems could. 18 refs., 12 figs., 1 tab.
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.
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.
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.
Energy Technology Data Exchange (ETDEWEB)
Tomita, M.; Doki, S.; Okuma, S. [Nagoya University, Nagoya (Japan); Yamaguchi, H. [The Aichi Electric Co. Ltd., Aichi (Japan)
1998-04-01
Sensorless starting and low speed drive of a cylindrical brushless DC motor with un-known load have been a difficult problem because an electromotive force does not arise enough at the starting and at low speeds and an inductance is constant irrespective of rotor position. In this paper, it is proposed to paste non-magnetic material and to measure a voltage of an opened phase to realize sensorless starting and low speed drives. The method is shown very feasible by experiments. 13 refs., 17 figs., 2 tabs.