Brushless Motor without a Shaft-Mounted Position Sensor. Tsunehiro Endo Fumio Tajima Member Member. Summary
|
|
- Agatha Moody
- 5 years ago
- Views:
Transcription
1 Paper UDC : : : Brushless Motor without a Shaft-Mounted Position Sensor By Tsunehiro Endo Fumio Tajima Member Member Kenichi Iizuka Member Summary Hideo Uzuhashi Non-member A brushless motor with a microcomputer-based speed control system, but without a shaft-mounted position sensor, is described. The motor terminal voltages are used to obtain rotor position information. Speed control in the system is carried out through chopper control of the inverter itself, much as in chopper-fed DC motors. Various processes, including the speed control process, are controlled by developing the appropriate software. The limits of position sensing under a motor load are also described. 1. Introduction Brushless motors are superior to inverter-fed induction motors in regard to their noise and efficiency and, therefore, they have recently begun to be used in variable speed drive systems. However, brushless motors need such rotor position sensors as shaft encorders, Hall effect transducers, etc., in order to obtain necessary rotor position information. A position sensor is usually mounted on the motor shaft, but this tends to reduce a system's overall ruggedness. If motor terminal voltages are used to supply rotor position information, the shaft-mounted position sensor can be eliminated(1). As is well known, brushless motors are generally similar to DC motors in regard to their speed control properties. Accordingly, the PWM inverter that is usually used in the speed control system of induction motors can also be used in the speed control system of brushless motors. This paper presents a brushless motor control system, which includes a voltage source inverter, in which motor terminal voltages are used to obtain position sensor signals and speed control is performed by an inverter chopper. The following items are described in Tsunehiro Endo, Fumio Tajinaa, Kenichi Iizuka, & Hideo Uzuhashi are with Hitachi, Ltd. Manuscript received Aug. 12, 1983, revised Sept. 8, this paper. (1) The hardware and software structures of the brushiess motor control system. (2) A method of controlling the inverter output voltage. (3) A method of detecting rotor position using motor terminal voltages and a position sensing limit for the motor load. (4) Experimental results. 2. Description of the Control System 2.1 Hardware structure A brushless motor control system without a shaftmounted position sensor is shown in Figs. I and 2. The brushless motor consists of a synchronous motor with permanent magnet excitation, an inverter with a voltage source and 120 K conduction, a rectifier, a position sensor circuit in which position sensor signals are obtained from term inat'voltages, a control circuit, and a drive circuit. The inverter itself has an output voltage control function for adjusting motor speed. The control circuit consists of a microcomputer and a custom LSI 1/0 processing unit which processes input/output data for the inverter and operates as a peripheral circuit of the microcomputer"', as shown in Fig. 2. The development of appropriate software allows various processes, including speed control, to be
2 Fig. 2. Block diagram of control circuit. carried out with the above mentioned 2.2 Structure of software hardware. Fig. 3 shows a block diagram of the software for the brushless motor control system. In the figure, IRQ and SWI are entrances for different programs started respectively by interrupt request signals from the I/O processing unit. to the microcomputer and by a software interrupt instruction. The software consists of an operating system, which manages different programs, and various tasks required to operate the brushless motor. The operating system is composed of a restart process, IRQ controller, task dispatcher, etc. Four processes are controlled by the IRQ controller, examples of which are a process which interrupts motor operations or suppresses an instantaneous motor current while motor operations continue thus protecting the inverter from excessive motor current and a process which performs a periodic operation to obtain motor speed from position sensor signals. The processes that protect the inverter from destruction by an over voltage or over current are performed by over-voltage and over-load tasks. In the speed control task, the inverter output voltage is determined by the motor speed obtained from the operating system and a speed command from a command reading task. One of the remarkable features of this brushless motor control system is the motor start task which allows the inverter to be operated as a separatelycontrolled inverter until the motor reaches a speed at which position sensor signals become available, as shown in Fig. 4. During the motor start task operation, the inverter drive signals are generated in the microcomputer although there are also position sensor Fig. 4. Operation pattern at motor start. signals. The frequency of these drive signals is accelerated by degrees. In other words, the time during 60 electrical degrees is calculated for a desired inverter output frequency, and the inverter current path modes are changed whenever the calculated time, which is shortened by degrees, elapses. When the position sensor signals become available, the microcomputer changes the inverter operation to selfcontrolled if the inverter current path mode of the position sensor signals coincides with this mode or the next one of the drive signals generated in the microcomputer. The drive signals are decided according to the position sensor signals during the inverter
3 self-controlled operation. 3. Speed Control Method 3.1 General considerations The characteristics of brushless motors are similar to those of DC motors. Accordingly, the speed of a brushless motor can be controlled by adjusting motor terminal voltages. In the present control system, terminal voltages are adjusted by operating the inverter in the same manner as a PWM inverter in induction motors. The equivalent circuit for the brushless motor during one. of six current path modes (60 electrical degrees) is shown in Fig. 5. Two transistors are placed between the motor terminals and the DC power supply. Motor terminal voltage can be adjusted by operating either transistor as a chopper with the other one in the on-state, as in chopper-fed DC motors. In order to prevent interruptions in motor current during periods of 120 electrical degrees, the transistor located opposite the chopper action transistor (either transistor shown by the broken line in Fig. 5) is switched on and off during two current path modes. This complementary switching methed facilitates speed control over a wide range of motor loads. 3.2 Actual control method Variovs chopper control methods are possible, depending on which of the six transistors in the inverter is the chopper. In the present control system a transistor acts as a chopper only during the latter half of the transistor's 120 electrical degrees conduction period. Fig. 6 shows signals and waveforms obtained for the terminal voltage and the motor current, where the terminal voltage is equal to the transistor collectoremitter voltage on the minus arm side. Drive signals for the inverter (Fig. 6 (c) ) are generated by the I/O LSI according to position sensor signals and a chopper signal. Speed control is accomplished by regulating a chopper signal duty factor. The duty factor is determined by writing duty factor data for one of the many registers in the I/O LSI in software. The motor current waveform, for the case in which chopper signal off-time is longer than the interval represented by the motor winding's time constant and the motor voltage, and drive signal and terminal voltage waveforms are shown in Fig. 7. In the above case, when chopper signal off-time is relatively long, (a) drive signals for A+ and A-, (b) motor current for phase A, (c) teminal voltage for phase A. Fig. 7. Waveforms for the case in which a chopper signal's off-time is relatively long. motor current flows alternately in positive and negative directions even during 120 electrical degrees periods, because of the effect of the complementary switching method described above. 4. Position Detection 4.1 Relation between phase voltage and commutation In order to obtain an average motor torque that is as high as possible, the commutation leading angle must be nearly zero. That is, commutation should occur at the instant when two of three motor phase voltages are equal. On the one hand, such a commutation event is equal to zero crossings of the integrated motor phase voltages. For example, in the case of the phases of the B+ and B- transistors in the inverter at turn-on, va is equal to vb and vc integrated is equal to zero, where va, vb and vc are the voltage of the A,B and C phases, respectively. If the motor phase voltages are then obtained from the terminal voltages and integrated, it becomes possible to detect rotor position. 4.2 Phase voltage detection An additional center for phase voltage detection is made available by connecting three resistances on
4 Fig. 8. Circuits and waveforms illustrating method of detecting phase voltage. (a) without chopping, (b) with chopping, (c) chopper signal. Fig. 9. Terminal voltage waveforms. lines led from the motor terminals in a start-shaped configuration as shown in Fig, 8 ( a) 3. If the system is symmetrical, the two centers of resistance and the motor windings will have the same potential. The voltages corresponding to the motor phase voltages are obtained by comparing the terminal voltages with the voltage at the center of the star-shaped configuration of resistors. These corresponding voltages contain phase voltages and motor winding impedance drops. The phase relationships between the terminal voltage V and the center voltage Vm are illustrated by the waveforms shown in Fig. 8 ( b), in which no chopping occurrs. The waveform imposed on terminal voltages by a voltage source inverter are nearly trapezoidal in shape and contain no visible evidence of motor voltages. The only information required for detecting rotor position is the zerocrossing information contained in the phase voltages. No amplitude information is necessary. As explained below, the necessary information can be obtained without interference from the above mentioned motor winding impedance drops. The equivalent circuit for the current flow period during which the transistors C+ and B- are in the on-state (mode (I) in Fig. 8(b)) is shown in Fig. 8 (c). The following equations can be obtained from the figure. voltage Va and the center voltage Vm is equal to the phase voltage va. That is, the phase voltage can be obtained uninfluenced by the motor winding impedance drops. Assuming that the three phase voltages va, t b and vc are balanced and that the winding impedances are equal to each other, the terminal voltage is equal to one half the DC voltage Ed in the phase in which the terminal voltage V is equal to the center voltage Vm. This also applies to mode (II) in Fig. 8(b), and to modes (I) and (H) with chopping when there is no motor current flowing in those modes. Therefore, position sensor signals are obtained by phase-shifting the signal generated in a comparison of the terminal and center voltages in modes (I) and (II), by 90 electrical degrees, as shown in Fig. 8(b). Fig. 9 shows the terminal voltage waveforms in detail, including the impedance drops. 4.3 Position sensor circuit In order to obtain position sensor signals, it is necessary to phase-shift the phase voltages obtained from the teminal voltages by 90 electrical degrees as indicated above. However, the terminal voltages contain many transistor commutation and chopper caused transients. Consequently, it is better first to phase-shift and filter the terminal voltage in order to attenuate these transients. A block diagram of the proposed position sensor circuit is shown in Fig. 10. The position sensor circuit consists of simple high-and low-pass filters, resistors connected in a star-shaped configuration, and comparators. Fig. 11 shows the waveforms characteristic of the voltages present at selected points in the position sensor circuit when there is no chopper control. The high-pass filters attenuate the DC components in the terminal voltages and the low-pass filters attenuate the transients and shift the terminal voltage back by 90 electrical degrees. The center voltage Vnf that
5
6 Fig. 14. Overlap angle and motor current at instant of commutation versus commutation leading angle. angle depends on the motor winding time constant, the motor current at the instant of commutation and the commutation leading angle(1). Fig. 14 shows the relation between the overlap angle p and the motor current at the instant of commutation Iao and the commutation leading angle S for a given motor load and speed(4). As shown in the figure, for a commutation leadig angle smaller than about 25 electrical degrees, the overlap angle p and the motor current at the instant of commutation Iuo decrease as the size of the commutation leading angle increases. Consequently, even if the fundamental components of the terminal voltages are shifted forward by the commutation transients, the overlap angle tends to decrease and the commutation leading angle does not continue to increase indefinitely. But for a commutation leading angle larger than about 25 electrical degrees, the overlap angle p and the motor current I,oo increase as the size of the commutation leading angle increases. As a result, a positive feedback loop is produced and the size of the commutation leading angle continues to increase until, finally, the motor stops. In order to extend the upper limit of the motor load, either comparators with a hysteresis function or six low-pass filters can be used. 5. Experimental Results The experimental setup used a brushless motor with a rated output of 1.2 kw. An 8 bit microcomputer based on the 6802 and the I/O LSI are responsible for system control functions. The filtered terminal voltage, motor current and motor speed immediately after motor start with a motor load of 130% are shown in Fig. 15. In this example, when the motor speed has reached 250 rpm, (a) position sensor signals, (b) filtered terminal voltage, (c) motor speed, (d) motor current. Fig. 15. Motor start characteristics. Fig. 16. Speed versus torque. inverter operation is changed from separately-to selfcontrolled. The maximum value of the motor current is limited during separately-controlled operation. Fig. 16 shows the speed/torque characteristics for various duty factors. The broken lines represent the characteristics in the case without complementary chopping, where the motor speed increases sharply as torque decreases. Fig. 17 shows the waveforms characteristic of the voltages present at selected points in the position sensor circuit and the motor current waveform in the case where the duty factor equals 0.5. The voltage waveform for the differential between the filtered terminal and center voltages is shown in Fig. 17(c).
7 (a) terminal voltage: 50 V/div, (b) filtered terminal voltage: 0.2 V/div, (c) differential between filtered terminal and center voltage : 0.2V/div, (d) motor current: 5A/div, horizontal: 2ms/div. Fig. 17. Wave forms. results shown in Fig Conclusion (a) when additional coils are connected, (b) when no additional coils are connected. Fig. 18. Relation between commutation leading angle and limit of detecting position. Fig. 18 shows results for examinations of the relation between the commutation leading angle and the position sensing limit. In the figure, variations in the commutation leading angle and the overlap angle are shown plotted against motor torque. The (a) curves plot the case for additional coils intentionally connected in series to the motor windings for the purpose of understanding exactly the position sensing limit phenomenon. As is evident them the motor stops when the commutation leading angle reached a size of about 25 electrical degrees. This confirms the calculated A brushless motor control system in which terminal voltages are used to detect rotor position has been developed. All the system control functions were assumed by a microcomputer and I/O LSI. A chopper control method was adopted in the, inverter to control motor speed. A complementary switching method facilitated speed control over a wide range of motor loads. The position sensor circuit consisted of only filters and comparators and was therefore, very simple. In the proposed position sensor circuit, the commutation leading angle increased in size as the motor load increases. It was found that motor speed could not be controlled when the commutaton leading angle was larger than about 25 electrical degrees. References (1) H. Le-Huy, A..Jakubowicz & R. Perret: "A self-controlled synchronous motor drive using terminal voltage system," IEEE Trans. Industr. Applic., IA-18, 46 (1982) (2) S. Morinage :"Microprocessor control system with I/O processing unit LSI for motor drive pwm inverter," in Conf. Rec IEEE Ind. Applic. Soc, Annu. Meeting, p (3) P. Ferrais, A. Vagati, & F. Villata: "P. M brushless motor drives:- a self-commutation system without rotor-position sensors," Proc, of the Ninth Annual Symp. on Incremental Motion Control Systems and Devices, p. 305 (1980) (4) S. Miyairi & Y. Tsunehiro: "The Analysis of a Commutatorless Motor as a DC Motor and its Characteristics" J. IEE of Japan (in Japanese), 85, 1585 (1965)
A Review: Sensorless Control of Brushless DC Motor
A Review: Sensorless Control of Brushless DC Motor Neha Gupta, M.Tech Student, Department of Electrical Engineering, Madan Mohan Malaviya Engineering College, Gorakhpur 273010 (U.P), India Dr.A.K. Pandey,
More informationIN MANY industrial applications, ac machines are preferable
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 46, NO. 1, FEBRUARY 1999 111 Automatic IM Parameter Measurement Under Sensorless Field-Oriented Control Yih-Neng Lin and Chern-Lin Chen, Member, IEEE Abstract
More informationLow-Cost Sensorless Control of Brushless dc Motors with Improved Speed Range
Low-Cost Sensorless Control of Brushless dc Motors with Improved Speed Range Gui-Jia Su and John W. McKeever Oak Ridge National Laboratory National Transportation Resrch Center 26 Cherahala Blvd. Knoxville,
More informationCHAPTER-III MODELING AND IMPLEMENTATION OF PMBLDC MOTOR DRIVE
CHAPTER-III MODELING AND IMPLEMENTATION OF PMBLDC MOTOR DRIVE 3.1 GENERAL The PMBLDC motors used in low power applications (up to 5kW) are fed from a single-phase AC source through a diode bridge rectifier
More informationVolume 1, Number 1, 2015 Pages Jordan Journal of Electrical Engineering ISSN (Print): , ISSN (Online):
JJEE Volume, Number, 2 Pages 3-24 Jordan Journal of Electrical Engineering ISSN (Print): 249-96, ISSN (Online): 249-969 Analysis of Brushless DC Motor with Trapezoidal Back EMF using MATLAB Taha A. Hussein
More informationANALYSIS OF POWER QUALITY IMPROVEMENT OF BLDC MOTOR DRIVE USING CUK CONVERTER OPERATING IN DISCONTINUOUS CONDUCTION MODE
ANALYSIS OF POWER QUALITY IMPROVEMENT OF BLDC MOTOR DRIVE USING CUK CONVERTER OPERATING IN DISCONTINUOUS CONDUCTION MODE Bhushan P. Mokal 1, Dr. K. Vadirajacharya 2 1,2 Department of Electrical Engineering,Dr.
More informationNovel SRM Drive Systems Using Variable DC-Link Voltage
Novel SRM Drive Systems Using Variable DC-Link Voltage 1 JPE 11-3-1 Novel SRM Drive Systems Using Variable DC-Link Voltage Do-Hyun Jang Dept. of Electrical Engineering, Hoseo University, Asan, Korea Abstract
More informationA Novel Control Method for Input Output Harmonic Elimination of the PWM Boost Type Rectifier Under Unbalanced Operating Conditions
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 16, NO. 5, SEPTEMBER 2001 603 A Novel Control Method for Input Output Harmonic Elimination of the PWM Boost Type Rectifier Under Unbalanced Operating Conditions
More informationCourseware Sample F0
Electric Power / Controls Courseware Sample 85822-F0 A ELECTRIC POWER / CONTROLS COURSEWARE SAMPLE by the Staff of Lab-Volt Ltd. Copyright 2009 Lab-Volt Ltd. All rights reserved. No part of this publication
More informationSPEED CONTROL OF SENSORLESS BLDC MOTOR WITH FIELD ORIENTED CONTROL
ISSN: 2349-2503 SPEED CONTROL OF SENSORLESS BLDC MOTOR WITH FIELD ORIENTED CONTROL JMuthupandi 1 DCitharthan 2 MVaratharaj 3 1 (UG Scholar/EEE department/ Christ the king engg college/ Coimbatore/India/
More informationBECAUSE OF their low cost and high reliability, many
824 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 45, NO. 5, OCTOBER 1998 Sensorless Field Orientation Control of Induction Machines Based on a Mutual MRAS Scheme Li Zhen, Member, IEEE, and Longya
More informationCURRENT FOLLOWER APPROACH BASED PI AND FUZZY LOGIC CONTROLLERS FOR BLDC MOTOR DRIVE SYSTEM FED FROM CUK CONVERTER
CURRENT FOLLOWER APPROACH BASED PI AND FUZZY LOGIC CONTROLLERS FOR BLDC MOTOR DRIVE SYSTEM FED FROM CUK CONVERTER N. Mohanraj and R. Sankaran Shanmugha Arts, Science, Technology and Research Academy University,
More informationHARDWARE IMPLEMENTATION OF DIGITAL SIGNAL CONTROLLER FOR THREE PHASE VECTOR CONTROLLED INDUCTION MOTOR
HARDWARE IMPLEMENTATION OF DIGITAL SIGNAL CONTROLLER FOR THREE PHASE VECTOR CONTROLLED INDUCTION MOTOR SOHEIR M. A. ALLAHON, AHMED A. ABOUMOBARKA, MAGD A. KOUTB, H. MOUSA Engineer,Faculty of Electronic
More informationControlling of Permanent Magnet Brushless DC Motor using Instrumentation Technique
Scientific Journal of Impact Factor(SJIF): 3.134 International Journal of Advance Engineering and Research Development Volume 2,Issue 1, January -2015 e-issn(o): 2348-4470 p-issn(p): 2348-6406 Controlling
More informationSpeed control of sensorless BLDC motor with two side chopping PWM
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 2320-3331, Volume 6, Issue 3 (May. - Jun. 2013), PP 16-20 Speed control of sensorless BLDC motor with two side
More informationSIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BLDC MOTOR BASED ON A COMMON DC SIGNAL
SIMULATION AND IMPLEMENTATION OF CURRENT CONTROL OF BLDC MOTOR BASED ON A COMMON DC SIGNAL J.Karthikeyan* Dr.R.Dhanasekaran** * Research Scholar, Anna University, Coimbatore ** Research Supervisor, Anna
More informationCHAPTER 4 FUZZY BASED DYNAMIC PWM CONTROL
47 CHAPTER 4 FUZZY BASED DYNAMIC PWM CONTROL 4.1 INTRODUCTION Passive filters are used to minimize the harmonic components present in the stator voltage and current of the BLDC motor. Based on the design,
More informationStep vs. Servo Selecting the Best
Step vs. Servo Selecting the Best Dan Jones Over the many years, there have been many technical papers and articles about which motor is the best. The short and sweet answer is let s talk about the application.
More informationPerformance Enhancement of Sensorless Control of Z-Source Inverter Fed BLDC Motor
IJSTE - International Journal of Science Technology & Engineering Volume 1 Issue 11 May 2015 ISSN (online): 2349-784X Performance Enhancement of Sensorless Control of Z-Source Inverter Fed BLDC Motor K.
More informationMODELLING AND SIMULATION OF DIODE CLAMP MULTILEVEL INVERTER FED THREE PHASE INDUCTION MOTOR FOR CMV ANALYSIS USING FILTER
MODELLING AND SIMULATION OF DIODE CLAMP MULTILEVEL INVERTER FED THREE PHASE INDUCTION MOTOR FOR CMV ANALYSIS USING FILTER Akash A. Chandekar 1, R.K.Dhatrak 2 Dr.Z.J..Khan 3 M.Tech Student, Department of
More informationPage ENSC387 - Introduction to Electro-Mechanical Sensors and Actuators: Simon Fraser University Engineering Science
Motor Driver and Feedback Control: The feedback control system of a dc motor typically consists of a microcontroller, which provides drive commands (rotation and direction) to the driver. The driver is
More informationA COMPARISON STUDY OF THE COMMUTATION METHODS FOR THE THREE-PHASE PERMANENT MAGNET BRUSHLESS DC MOTOR
A COMPARISON STUDY OF THE COMMUTATION METHODS FOR THE THREE-PHASE PERMANENT MAGNET BRUSHLESS DC MOTOR Shiyoung Lee, Ph.D. Pennsylvania State University Berks Campus Room 120 Luerssen Building, Tulpehocken
More informationDesign of A Closed Loop Speed Control For BLDC Motor
International Refereed Journal of Engineering and Science (IRJES) ISSN (Online) 2319-183X, (Print) 2319-1821 Volume 3, Issue 11 (November 214), PP.17-111 Design of A Closed Loop Speed Control For BLDC
More informationConventional Paper-II-2011 Part-1A
Conventional Paper-II-2011 Part-1A 1(a) (b) (c) (d) (e) (f) (g) (h) The purpose of providing dummy coils in the armature of a DC machine is to: (A) Increase voltage induced (B) Decrease the armature resistance
More informationFuzzy Logic Based Speed Control of BLDC Motor
Fuzzy Logic Based Speed Control of BLDC Motor Mahesh Sutar #1, Ashish Zanjade *2, Pankaj Salunkhe #3 # EXTC Department, Mumbai University. 1 Sutarmahesh4@gmail.com 2 Zanjade_aa@rediffmail.com 3 pasalunkhe@gmail.com
More informationRenewable Energy Based Interleaved Boost Converter
Renewable Energy Based Interleaved Boost Converter Pradeepakumara V 1, Nagabhushan patil 2 PG Scholar 1, Professor 2 Department of EEE Poojya Doddappa Appa College of Engineering, Kalaburagi, Karnataka,
More informationADVANCED ROTOR POSITION DETECTION TECHNIQUE FOR SENSORLESS BLDC MOTOR CONTROL
International Journal of Soft Computing and Engineering (IJSCE) ISSN: 3137, Volume, Issue-1, March 1 ADVANCED ROTOR POSITION DETECTION TECHNIQUE FOR SENSORLESS BLDC MOTOR CONTROL S.JOSHUWA, E.SATHISHKUMAR,
More informationImplementation and position control performance of a position-sensorless IPM motor drive system based on magnetic saliency
Engineering Electrical Engineering fields Okayama University Year 1998 Implementation and position control performance of a position-sensorless IPM motor drive system based on magnetic saliency Satoshi
More informationRCL filter to suppress motor terminal overvoltage in PWM inverter fed Permanent Magnet synchronous motor with long cable leads
RCL filter to suppress motor terminal overvoltage in PWM inverter fed Permanent Magnet synchronous motor with long cable leads M.B.RATHNAPRIYA1 A.JAGADEESWARAN2 M.E scholar, Department of EEE Sona College
More informationEfficiency Optimized Brushless DC Motor Drive. based on Input Current Harmonic Elimination
Efficiency Optimized Brushless DC Motor Drive based on Input Current Harmonic Elimination International Journal of Power Electronics and Drive System (IJPEDS) Vol. 6, No. 4, December 2015, pp. 869~875
More informationBLDC TORQUE RIPPLE MINIMIZATION USING MODIFIED STAIRCASE PWM
BLDC TORQUE RIPPLE MINIMIZATION USING MODIFIED STAIRCASE PWM M. Senthil Raja and B. Geethalakshmi Pondicherry Engineering College, Pondicherry, India E-Mail: muthappa.senthil@yahoo.com ABSTRACT This paper
More informationCHAPTER 2 STATE SPACE MODEL OF BLDC MOTOR
29 CHAPTER 2 STATE SPACE MODEL OF BLDC MOTOR 2.1 INTRODUCTION Modelling and simulation have been an essential part of control system. The importance of modelling and simulation is increasing with the combination
More informationPOWER FACTOR IMPROVEMENT USING CURRENT SOURCE RECTIFIER WITH BATTERY CHARGING CAPABILITY IN REGENERATIVE MODE OF SRM
POWER FACTOR IMPROVEMENT USING CURRENT SOURCE RECTIFIER WITH BATTERY CHARGING CAPABILITY IN REGENERATIVE MODE OF SRM M.Rajesh 1, M.Sunil Kumar 2 1 P.G.Student, 2 Asst.Prof, Dept.of Eee, D.V.R & Dr.H.S
More informationDesign of double loop-locked system for brush-less DC motor based on DSP
International Conference on Advanced Electronic Science and Technology (AEST 2016) Design of double loop-locked system for brush-less DC motor based on DSP Yunhong Zheng 1, a 2, Ziqiang Hua and Li Ma 3
More informationISSN Vol.05,Issue.01, January-2017, Pages:
WWW.IJITECH.ORG ISSN 2321-8665 Vol.05,Issue.01, January-2017, Pages:0028-0032 Digital Control Strategy for Four Quadrant Operation of Three Phase BLDC Motor with Load Variations MD. HAFEEZUDDIN 1, KUMARASWAMY
More informationSimulation and Implementation of FPGA based three phase BLDC drive for Electric Vehicles
Volume 118 No. 16 2018, 815-829 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu ijpam.eu Simulation and Implementation of FPGA based three phase BLDC drive
More informationSensorless control of BLDC motor based on Hysteresis comparator with PI control for speed regulation
Sensorless control of BLDC motor based on Hysteresis comparator with PI control for speed regulation Thirumoni.T 1,Femi.R 2 PG Student 1, Assistant Professor 2, Department of Electrical and Electronics
More information3. What is the difference between Switched Reluctance motor and variable reluctance stepper motor?(may12)
EE6703 SPECIAL ELECTRICAL MACHINES UNIT III SWITCHED RELUCTANCE MOTOR PART A 1. What is switched reluctance motor? The switched reluctance motor is a doubly salient, singly excited motor. This means that
More informationModeling and Analysis of Common-Mode Voltages Generated in Medium Voltage PWM-CSI Drives
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 18, NO. 3, MAY 2003 873 Modeling and Analysis of Common-Mode Voltages Generated in Medium Voltage PWM-CSI Drives José Rodríguez, Senior Member, IEEE, Luis Morán,
More informationFuzzy Logic Controller Based Direct Torque Control of PMBLDC Motor
Fuzzy Logic Controller Based Direct Torque Control of PMBLDC Motor Madasamy P 1, Ramadas K 2, Nagapriya S 3 1, 2, 3 Department of Electrical and Electronics Engineering, Alagappa Chettiar College of Engineering
More informationAnalysis of an Economical BLDC Drive System
Analysis of an Economical BLDC Drive System Maria Shaju 1, Ginnes.K.John. 2 M.Tech Student, Dept. of Electrical and Electronics Engineering, Rajagiri School of Engineering and Technology, Kochi, India
More informationSharmila Kumari.M, Sumathi.V, Vivekanandan S, Shobana S
International Journal of Scientific & Engineering Research, Volume 5, Issue 4, April-2014 388 PERFORMANCE IMPROVEMENT OF BLDC MOTOR USING FUZZY LOGIC CONTROLLER Sharmila Kumari.M, Sumathi.V, Vivekanandan
More informationImpact of PWM Control Frequency onto Efficiency of a 1 kw Permanent Magnet Synchronous Motor
http://dx.doi.org/10.5755/j01.eie.22.6.17216 ELEKTRONIKA IR ELEKTROTECHNIKA, ISSN 1392-1215, VOL. 22, NO. 6, 2016 Impact of PWM Control Frequency onto Efficiency of a 1 kw Permanent Magnet Synchronous
More informationTRACK VOLTAGE APPROACH USING CONVENTIONAL PI AND FUZZY LOGIC CONTROLLER FOR PERFORMANCE COMPARISON OF BLDC MOTOR DRIVE SYSTEM FED BY CUK CONVERTER
International Journal of Mechanical Engineering and Technology (IJMET) Volume 9, Issue 12, December 2018, pp. 778 786, Article ID: IJMET_09_12_078 Available online at http://www.ia aeme.com/ijmet/issues.asp?jtype=ijmet&vtype=
More informationDynamic Response of Wound Rotor Induction Generator for. Wind Energy Application
Dynamic Response of Wound Rotor Induction Generator for Wind Energy Application Saurabh Gupta Kishor Thakre Gaurav Gupta Research scholar Research scholar Research Scholar UIT-RGPV BHOPAL UIT-RGPV BHOPAL
More informationSimulation of Sensorless Digital Control of BLDC Motor Based on Zero Cross Detection
Simulation of Sensorless Digital Control of BLDC Motor Based on Zero Cross Detection S.P. Ajitha 1, S. Bagavathy 2, Dr. P. Maruthu Pandi 3 1 PG Scholar, Department of Power Electronics and Drives, Sri
More informationMSK4310 Demonstration
MSK4310 Demonstration The MSK4310 3 Phase DC Brushless Speed Controller hybrid is a complete closed loop velocity mode controller for driving a brushless motor. It requires no external velocity feedback
More informationSPEED CONTROL OF INDUCTION MOTOR WITHOUT SPEED SENSOR AT LOW SPEED OPERATIONS
SPEED CONTROL OF INDUCTION MOTOR WITHOUT SPEED SENSOR AT LOW SPEED OPERATIONS Akshay Prasad Dubey and Saravana Kumar R. School of Electrical Engineering, VIT University, Vellore, Tamil Nadu, India E-Mail:
More informationModeling and Simulation Analysis of Eleven Phase Brushless DC Motor
Modeling and Simulation Analysis of Eleven Phase Brushless DC Motor Priyanka C P 1,Sija Gopinathan 2, Anish Gopinath 3 M. Tech Student, Department of EEE, Mar Athanasius College of Engineering, Kothamangalam,
More informationMeasurement and reduction of EMI radiated by a PWM inverter-fed AC motor drive system
Engineering Electrical Engineering fields Okayama University Year 1997 Measurement and reduction of EMI radiated by a PWM inverter-fed AC motor drive system Satoshi Ogasawara Okayama University Hirofumi
More informationCHAPTER 6 CURRENT REGULATED PWM SCHEME BASED FOUR- SWITCH THREE-PHASE BRUSHLESS DC MOTOR DRIVE
125 CHAPTER 6 CURRENT REGULATED PWM SCHEME BASED FOUR- SWITCH THREE-PHASE BRUSHLESS DC MOTOR DRIVE 6.1 INTRODUCTION Permanent magnet motors with trapezoidal back EMF and sinusoidal back EMF have several
More informationAn Adjustable-Speed PFC Bridgeless Single Switch SEPIC Converter-Fed BLDC Motor
An Adjustable-Speed PFC Bridgeless Single Switch SEPIC Converter-Fed BLDC Motor Tintu Rani Joy M. Tech Scholar St. Joseph college of Engineering and technology Palai Shiny K George, Assistant Professor
More informationSpeed Control Of Transformer Cooler Control By Using PWM
Speed Control Of Transformer Cooler Control By Using PWM Bhushan Rakhonde 1, Santosh V. Shinde 2, Swapnil R. Unhone 3 1 (assistant professor,department Electrical Egg.(E&P), Des s Coet / S.G.B.A.University,
More informationUNIT-III STATOR SIDE CONTROLLED INDUCTION MOTOR DRIVE
UNIT-III STATOR SIDE CONTROLLED INDUCTION MOTOR DRIVE 3.1 STATOR VOLTAGE CONTROL The induction motor 'speed can be controlled by varying the stator voltage. This method of speed control is known as stator
More informationA Double ZVS-PWM Active-Clamping Forward Converter: Analysis, Design, and Experimentation
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 16, NO. 6, NOVEMBER 2001 745 A Double ZVS-PWM Active-Clamping Forward Converter: Analysis, Design, and Experimentation René Torrico-Bascopé, Member, IEEE, and
More informationFOR the last decade, many research efforts have been made
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 19, NO. 6, NOVEMBER 2004 1601 A Novel Approach for Sensorless Control of PM Machines Down to Zero Speed Without Signal Injection or Special PWM Technique Chuanyang
More informationNew 24-Pulse Diode Rectifier Systems for Utility Interface of High-Power AC Motor Drives
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 33, NO. 2, MARCH/APRIL 1997 531 New 24-Pulse Diode Rectifier Systems for Utility Interface of High-Power AC Motor Drives Sewan Choi, Member, IEEE, Bang
More informationInductance Based Sensorless Control of Switched Reluctance Motor
I J C T A, 9(16), 2016, pp. 8135-8142 International Science Press Inductance Based Sensorless Control of Switched Reluctance Motor Pradeep Vishnuram*, Siva T.**, Sridhar R.* and Narayanamoorthi R.* ABSTRACT
More informationSimulation And Comparison Of Space Vector Pulse Width Modulation For Three Phase Voltage Source Inverter
Simulation And Comparison Of Space Vector Pulse Width Modulation For Three Phase Voltage Source Inverter Associate Prof. S. Vasudevamurthy Department of Electrical and Electronics Dr. Ambedkar Institute
More informationPE Electrical Machine / Power Electronics. Power Electronics Training System. ufeatures. } List of Experiments
Electrical Machine / Power Electronics PE-5000 Power Electronics Training System The PE-5000 Power Electronics Training System consists of 28 experimental modules, a three-phase squirrel cage motor, load,
More informationCHAPTER 6 THREE-LEVEL INVERTER WITH LC FILTER
97 CHAPTER 6 THREE-LEVEL INVERTER WITH LC FILTER 6.1 INTRODUCTION Multi level inverters are proven to be an ideal technique for improving the voltage and current profile to closely match with the sinusoidal
More informationA NEW C-DUMP CONVERTER WITH POWER FACTOR CORRECTION FEATURE FOR BLDC DRIVE
International Journal of Electrical and Electronics Engineering Research (IJEEER) ISSN 2250-155X Vol. 3, Issue 3, Aug 2013, 59-70 TJPRC Pvt. Ltd. A NEW C-DUMP CONVERTER WITH POWER FACTOR CORRECTION FEATURE
More informationIEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 14, NO. 3, MAY A Sliding Mode Current Control Scheme for PWM Brushless DC Motor Drives
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 14, NO. 3, MAY 1999 541 A Sliding Mode Current Control Scheme for PWM Brushless DC Motor Drives Jessen Chen and Pei-Chong Tang Abstract This paper proposes
More informationSascha Stegen School of Electrical Engineering, Griffith University, Australia
Sascha Stegen School of Electrical Engineering, Griffith University, Australia Electrical Machines and Drives Motors Generators Power Electronics and Drives Open-loop inverter-fed General arrangement of
More informationStudy on DC-DC Converters for a Pfc BLDC Motor Drive
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 2320-3331, PP 81-88 www.iosrjournals.org Study on DC-DC Converters for a Pfc BLDC Motor Drive Baiju Antony 1,
More informationADVANCED CONTROL TECHNIQUES IN VARIABLE SPEED STAND ALONE WIND TURBINE SYSTEM
ADVANCED CONTROL TECHNIQUES IN VARIABLE SPEED STAND ALONE WIND TURBINE SYSTEM V. Sharmila Deve and S. Karthiga Department of Electrical and Electronics Engineering Kumaraguru College of Technology, Coimbatore,
More informationElectrical Motor Power Measurement & Analysis
Electrical Motor Power Measurement & Analysis Understand the basics to drive greater efficiency Test&Measurement Energy is one of the highest cost items in a plant or facility, and motors often consume
More informationLow Cost Power Converter with Improved Performance for Switched Reluctance Motor Drives
ISSN (Online) : 2319-8753 ISSN (Print) : 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology Volume 3, Special Issue 3, March 2014 2014 International Conference
More informationDesign and Implementation of PID Controller for a two Quadrant Chopper Fed DC Motor Drive
Research Article International Journal of Current Engineering and Technology ISSN 0 0 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijcet Design and Implementation of PID Controller
More informationIT HAS LONG been recognized that bearing damage can be
1042 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 34, NO. 5, SEPTEMBER/OCTOBER 1998 Bearing Currents and Shaft Voltages of an Induction Motor Under Hard- and Soft-Switching Inverter Excitation Shaotang
More informationFuzzy logic control implementation in sensorless PM drive systems
Philadelphia University, Jordan From the SelectedWorks of Philadelphia University, Jordan Summer April 2, 2010 Fuzzy logic control implementation in sensorless PM drive systems Philadelphia University,
More informationSimulation of MRAC based speed control of brushless DC motor with low-resolution hall-effect sensors
Simulation of MRAC based speed control of brushless DC motor with low-resolution hall-effect sensors G.SUNIL 1, B.RAJASEKHAR 2 M.E Scholar (Control Systems), EEE, ANITS College, Visakhapatnam, India 1
More informationPFC CUK CONVERTER FOR BLDC MOTOR DRIVES
PFC CUK CONVERTER FOR BLDC MOTOR DRIVES N.GEETHANJALI* DR.M.RAVINDRA** PG SCHOLAR*ASSISTANT PROFESSOR** ANU BOSE INSTITUTE OF TECHNOLOGY,K.S.P ROAD, NEW PALONCHA, ABSTRACT: BHADRADRI KOTHAGUDEM(DIST) The
More informationImproved direct torque control of induction motor with dither injection
Sādhanā Vol. 33, Part 5, October 2008, pp. 551 564. Printed in India Improved direct torque control of induction motor with dither injection R K BEHERA andspdas Department of Electrical Engineering, Indian
More informationA Simple Sensor-less Vector Control System for Variable
Paper A Simple Sensor-less Vector Control System for Variable Speed Induction Motor Drives Student Member Hasan Zidan (Kyushu Institute of Technology) Non-member Shuichi Fujii (Kyushu Institute of Technology)
More informationControl of buck-boost chopper type AC voltage regulator
International Journal of Research in Advanced Engineering and Technology ISSN: 2455-0876; Impact Factor: RJIF 5.44 www.engineeringresearchjournal.com Volume 2; Issue 3; May 2016; Page No. 52-56 Control
More informationVECTOR CONTROL SCHEME FOR INDUCTION MOTOR WITH DIFFERENT CONTROLLERS FOR NEGLECTING THE END EFFECTS IN HEV APPLICATIONS
VECTOR CONTROL SCHEME FOR INDUCTION MOTOR WITH DIFFERENT CONTROLLERS FOR NEGLECTING THE END EFFECTS IN HEV APPLICATIONS M.LAKSHMISWARUPA 1, G.TULASIRAMDAS 2 & P.V.RAJGOPAL 3 1 Malla Reddy Engineering College,
More informationServoStep technology
What means "ServoStep" "ServoStep" in Ever Elettronica's strategy resumes seven keypoints for quality and performances in motion control applications: Stepping motors Fast Forward Feed Full Digital Drive
More informationCost Effective Control of Permanent Magnet Brushless Dc Motor Drive
Cost Effective Control of Permanent Magnet Brushless Dc Motor Drive N.Muraly #1 #1 Lecturer, Department of Electrical and Electronics Engineering, Karaikal Polytechnic College, Karaikal, India. Abstract-
More informationReduction of Torque Ripple in Trapezoidal PMSM using Multilevel Inverter
Reduction of Torque Ripple in Trapezoidal PMSM using Multilevel Inverter R.Ravichandran 1, S.Sivaranjani 2 P.G Student [PSE], Dept. of EEE, V.S.B. Engineering College, Karur, Tamilnadu, India 1 Assistant
More informationApplying POWERSYS and SIMULINK to Modeling Switched Reluctance Motor
Tamkang Journal of Science and Engineering, Vol. 12, No. 4, pp. 429 438 (2009) 429 Applying POWERSYS and SIMULINK to Modeling Switched Reluctance Motor K. I. Hwu Institute of Electrical Engineering, National
More informationReduction of Harmonics and Torque Ripples of BLDC Motor by Cascaded H-Bridge Multi Level Inverter Using Current and Speed Control Techniques
Reduction of Harmonics and Torque Ripples of BLDC Motor by Cascaded H-Bridge Multi Level Inverter Using Current and Speed Control Techniques A. Sneha M.Tech. Student Scholar Department of Electrical &
More informationL E C T U R E R, E L E C T R I C A L A N D M I C R O E L E C T R O N I C E N G I N E E R I N G
P R O F. S L A C K L E C T U R E R, E L E C T R I C A L A N D M I C R O E L E C T R O N I C E N G I N E E R I N G G B S E E E @ R I T. E D U B L D I N G 9, O F F I C E 0 9-3 1 8 9 ( 5 8 5 ) 4 7 5-5 1 0
More informationCHAPTER 2 D-Q AXES FLUX MEASUREMENT IN SYNCHRONOUS MACHINES
22 CHAPTER 2 D-Q AXES FLUX MEASUREMENT IN SYNCHRONOUS MACHINES 2.1 INTRODUCTION For the accurate analysis of synchronous machines using the two axis frame models, the d-axis and q-axis magnetic characteristics
More informationExtraction of Extreme Power and Standardize of Voltage and Frequency under Varying Wind Conditions
Extraction of Extreme Power and Standardize of Voltage and Frequency under Varying Wind Conditions V. Karthikeyan 1 1 Department of ECE, SVSCE, Coimbatore, Tamilnadu, India, Karthick77keyan@gmail.com `
More informationAnalysis of Voltage Source Inverters using Space Vector PWM for Induction Motor Drive
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676 Volume 2, Issue 6 (Sep-Oct. 2012), PP 14-19 Analysis of Voltage Source Inverters using Space Vector PWM for Induction
More informationUpgrading from Stepper to Servo
Upgrading from Stepper to Servo Switching to Servos Provides Benefits, Here s How to Reduce the Cost and Challenges Byline: Scott Carlberg, Motion Product Marketing Manager, Yaskawa America, Inc. The customers
More informationEXTRACTING MORE POWER FROM THE LUNDELL CAR ALTERNATOR. D.M. Whaley, W.L. Soong and N. Ertugrul University of Adelaide Adelaide, Australia
Australasian Universities Power Engineering Conference (AUPEC ) -9 September, Brisbane, Australia EXTRACTING MORE POWER FROM THE LUNDELL CAR ALTERNATOR D.M. Whaley, W.L. Soong and N. Ertugrul University
More informationAbstract In this paper, a new three-phase, five-level inverter topology with a single-dc source is presented. The proposed topology is obtained by
, Student Member, IEEE, Student Member, IEEE, Fellow, IEEE, Member, IEEE, Fellow, IEEE Abstract In this paper, a new three-phase, five-level inverter topology with a single-dc source is presented. The
More informationRECENTLY, the harmonics current in a power grid can
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 23, NO. 2, MARCH 2008 715 A Novel Three-Phase PFC Rectifier Using a Harmonic Current Injection Method Jun-Ichi Itoh, Member, IEEE, and Itsuki Ashida Abstract
More informationMAGNETIC LEVITATION SUSPENSION CONTROL SYSTEM FOR REACTION WHEEL
IMPACT: International Journal of Research in Engineering & Technology (IMPACT: IJRET) ISSN 2321-8843 Vol. 1, Issue 4, Sep 2013, 1-6 Impact Journals MAGNETIC LEVITATION SUSPENSION CONTROL SYSTEM FOR REACTION
More informationPower Factor Improvement Using Current Source Rectifier with Battery Charging Capability in Regenerative Mode of Switched Reluctance Motor Drives
Power Factor Improvement Using Current ource Rectifier with Battery Charging Capability in Regenerative Mode of witched Reluctance Motor Drives A. Rashidi*, M. M. Namazi*, A. Bayat* and.m. aghaiannejad*
More informationA Practical Guide to Free Energy Devices
A Practical Guide to Free Energy Devices Part PatD14: Last updated: 25th February 2006 Author: Patrick J. Kelly This patent application shows the details of a device which it is claimed, can produce sufficient
More informationGlasgow eprints Service
Gallegos-Lopez, G. and Kjaer, P.C. and Miller, T.J.E. (1998) A new sensorless method for switched reluctance motor drives. IEEE Transactions on Industry Applications 34(4):pp. 832-840. http://eprints.gla.ac.uk/archive/00002838/
More informationSensors and Sensing Motors, Encoders and Motor Control
Sensors and Sensing Motors, Encoders and Motor Control Todor Stoyanov Mobile Robotics and Olfaction Lab Center for Applied Autonomous Sensor Systems Örebro University, Sweden todor.stoyanov@oru.se 13.11.2014
More informationStudy on Voltage Controller of Self-Excited Induction Generator Using Controlled Shunt Capacitor, SVC Magnetic Energy Recovery Switch
Study on Voltage Controller of Self-Excited Induction Generator Using Controlled Shunt Capacitor, SVC Magnetic Energy Recovery Switch Abstract F.D. Wijaya, T. Isobe, R. Shimada Tokyo Institute of Technology,
More informationWhere: (J LM ) is the load inertia referred to the motor shaft. 8.0 CONSIDERATIONS FOR THE CONTROL OF DC MICROMOTORS. 8.
Where: (J LM ) is the load inertia referred to the motor shaft. 8.0 CONSIDERATIONS FOR THE CONTROL OF DC MICROMOTORS 8.1 General Comments Due to its inherent qualities the Escap micromotor is very suitable
More informationControl of Electric Machine Drive Systems
Control of Electric Machine Drive Systems Seung-Ki Sul IEEE 1 PRESS к SERIES I 0N POWER ENGINEERING Mohamed E. El-Hawary, Series Editor IEEE PRESS WILEY A JOHN WILEY & SONS, INC., PUBLICATION Contents
More informationLARGE ac-drive applications have resulted in various
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 13, NO. 4, JULY 1998 617 Symmetric GTO and Snubber Component Characterization in PWM Current-Source Inverters Steven C. Rizzo, Member, IEEE, Bin Wu, Member,
More informationIEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 23, NO. 6, NOVEMBER
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 23, NO. 6, NOVEMBER 2008 3079 A Novel Position Sensorless Control of a Four-Switch, Brushless DC Motor Drive Without Phase Shifter Abolfazl Halvaei Niasar,
More information