Dissertation > Excellent graduate degree dissertation topics show

Research on Torque Ripple Reduction Method of Permanent Magnet AC Servo Motor

Author: LiuWei
Tutor: TangRenYuanï¼›ChenLiXiang
School: Shenyang University of Technology
Course: Motor and electrical
Keywords: Permanent Magnet Motor Cogging Torque Auxiliary Slot Rotor Eccentricity
CLC: TM383.4
Type: Master's thesis
Year: 2010
Downloads: 275
Quote: 0
Read: Download Dissertation

Abstract


With the advancement of science and technology and the enhancement of the level of industrial modernization, the accuracy of servo control system have become increasingly demanding. Torque ripple is concerned as an important performance parameter in servo control system and it directly affect on control precision of servo system. Because of torque ripple, vibration is generated when low speed and noise is generated when high speed. At present, minimization techniques of torque ripple of servo motor are extensively concerned, and the method of reducing cogging torque is paid more attention. In this paper, minimization techniques of cogging torque of servo motor are researched, and the effects of auxiliary slot and rotor eccentricity on cogging torque are mainly researched.Firstly, by using Ansoft Maxwell, auxiliary slot on the top of stator teeth is researched to reduce cogging torque. Several permanent magnet motor models are founded, and waveforms of cogging torque are obtained with different sizes of auxiliary slots. By analyzing, the effects of the size of auxiliary slots on cogging torque are analyzed and the optimal size is obtained. Moreover, the effect of auxiliary slots on back-EMF is also analyzed.Secondly, the analytical expression of cogging torque is derived based on energy method with considering the size of auxiliary slots. The calculation program is written by using Matlab software, and then several motor models are calculated. The effects of the size of auxiliary slots on cogging torque are analyzed and the optimal size is determined. The conclusion obtained by analytical method is almost identical to the finite element method. Moreover, the scope of application of auxiliary slot on the top of stator teeth is obtained.Thirdly, by using the software of Ansoft Maxwell, the effects of rotor static eccentricity, rotor dynamic eccentricity and the position of minimum air-gap on cogging torque are analyzed.Finally, permanent magnet AC servo motor is designed, and auxiliary slot on the top of stator teeth is adopted to reduce cogging torque. The prototype is manufactured, and then the conclusions which are obtained by Finite element method and analytic method are verified by test. In addition, performance parameters of the prototype meet the design requirements well.

Related Dissertations

  1. Study on the Influence of Drive Strategies on the Loss in AC Permanent Magnet Motor,TM351
  2. Switching flux permanent magnet motor three-dimensional finite element analysis and experimental research,TM351
  3. Wound rotor self- start permanent magnet motor design and performance analysis,TM351
  4. Submersible screw pump direct-drive permanent magnet motor research,TM351
  5. Low speed and high torque transverse flux permanent magnet synchronous motor control system research,TM341
  6. Research on Fault Diagonisis System of Ship Generator Rotor,U672
  7. Flux reverse permanent magnet motor,TM351
  8. Investigations on Vibration Characteristics of PM Motors Based on Phase Tuning,TM351
  9. Study and Design on High-Reliability Eletro-Machanical Actuator,V249.1
  10. Double mechanical port permanent magnet motor design and analysis,TM351
  11. The Study of Parameters Calculation and Structural Optimization for High-Speed Slotless Permancent Magnet Brushless DC Motor,TM33
  12. Application Research on Directly Driven Permanent Magnet Generator in High-Altitude Wind Power,TM351
  13. Switching flux permanent magnet synchronous motor systematic experimental study,TM351
  14. FPGA-based control system of permanent magnet motor,TM351
  15. New Hybrid Permanent Magnet motor pumping unit and its drive system and the detection system,TM351
  16. Research on Detection and Control System for New Direct-drive Motors,TM306
  17. Research and Design of Double-Stator Permanent Magnet Synchronous In-Wheel Motor,TM341
  18. Research on Noise and Its Reduction for Permanent Magnet Brushless DC Motor,TM351
  19. Vibration Characteristics of Car Steering Pump Permanent Magnet Motor,TM351
  20. Research on a Novel Transverse Flux Permanent Magnet Motor,TM351
  21. Electromagnetic Design and Simulation of Double-stator Permanent Magnet Motor Drive for Electric Motorcycle,U483

CLC: > Industrial Technology > Electrotechnical > Motor > Micro-motor > Control of micro motor > Servo motor
© 2012 www.DissertationTopic.Net  Mobile