Dissertation > Excellent graduate degree dissertation topics show

The Research of BLDC Motor Control Used to Drive Photovoltaic Pumps

Author: YuePeng
Tutor: SunPeiShi
School: Hefei University of Technology
Course: Power Electronics and Power Drives
Keywords: photovoltaic pumps system BLDC motor virtual neutral point PIC 16F877 back EMF
CLC: TM33
Type: Master's thesis
Year: 2004
Downloads: 285
Quote: 1
Read: Download Dissertation

Abstract


The emphasis of this paper is the commutation control of sensorless BLDC motor, which is used to drive Photovoltaic Pumps.This paper uses "virtual neutral point method" to measure the "zero crossing", then the soft deal "zero crossing" to get the six key position to commutate. It elaborates on the 3-step start technique .I adopt the method which permits the BLDC motor to automatically search the best time to change its operation stage from a separately controlled synchronous one to a self controlled one using the back EMF as the commutation signal. This method prevents the stepping out and stopping problems in the changing procedure of the motor.The sensing for rotor flux position of BLDC motor is the key of commutation, so this paper expatiates on three different methods to sense rotor flux position and compares their advantage and disadvantage.The system uses the microchip PIC16F877 made by Microchip Co.Ltd as a control chip. It fulfills the capture of "zero crossing" point and the multifarious protective functions. It realize the approximately exact commutation of the motor and unmanned supervision of the system.At the end of this paper, I put forward a new back EMF sensing method which doesn’t require a virtual neutral point to realize The sensing for rotor flux position. It improves the performance of BLDC motor at low speed and at high speed and broaden its range of timing.

Related Dissertations

  1. Study and Design on a Control System of Sensorless Brushless DC Motor Based on DSP,TM33
  2. Implantable Left Ventricular Assist Pump Control System Development,TP273
  3. Research on Sensorles Brushless DC Motor Control System Based on TMS320F2812,TM33
  4. Study on the Control Strategy of Sensorless Brushless DC Motor,TM33
  5. Research on Sensorless Brushless Dc Motor Control Systembased ADSP-BF548,TM33
  6. Study of Al-Ca Alloy Prepared by Molten Salt Electrolysis Method,TG146.21
  7. A Direct Torque Control System Based on DSP for PMSM,TM341
  8. Research on the Control Problems of Quad-Rotor Aircraft,V249.1
  9. Design on Sensorless Control System for Brushless DC Motor,TM33
  10. Sensorless BLDC Motor Control System Based on dsPIC30F2010 MCU,TM33
  11. Research on Sensorless Control of Brushless DC Motors for Electric Vehicles,TM33
  12. Motor Drive System Design and Flight Attitude Simulation for Micro Unmanned Aerial Vehicle,TM33
  13. Design of Control System for Permanent Magnet Claw Pole Motor with Outer Rotor,TM351
  14. The Research of Sensoless Control Method of the BLDC Motors,TP212
  15. Starting Control of Sensorless Brushless DC Motor,TM33
  16. Study on DSP Control of BLDC Motor for Electric Vehicle,U469.72
  17. Research on Design Methods of Brushless DC Motor Used for the Automatic Door Control System,TM33
  18. Design and Implementation of Sensorless BLDC Motor Control System Based on DSP,TM33
  19. Design on Sensorless Control System for Brushless DC Motor,TM33
  20. The Research of the Electric Power Steering System Based on BLDC Motor,U463.444
  21. New permanent switch from the flux generator,TM31

CLC: > Industrial Technology > Electrotechnical > Motor > DC motor
© 2012 www.DissertationTopic.Net  Mobile