Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (11): 73-78.doi: 10.16180/j.cnki.issn1007-7820.2020.11.014

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Effect of Slot Wedge Material on Electromagnetic Characteristics of PMLSM

LIU Zhuli,WANG Xudong,XU Xiaozhuo,JI Shengyang,FAN Lele   

  1. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China
  • Received:2020-08-05 Online:2020-11-15 Published:2020-11-27
  • Supported by:
    National Natural Science Foundation of China(U1504506);National Natural Science Foundation of China(51777060);Henan Province Science and Technology Research Project(162102210222);Henan Province Higher School Youth Key Teacher Training Program(2017GGJS051);HPU Youth Key Teacher Funding Program(GGJS2016-183);Henan Polytechnic University Doctoral Fund(B2018-30)


In order to improve the electromagnetic performance of permanent magnet linear synchronous motor and reduce the cogging force and thrust ripple, a solution of installing slot wedge at the slot of the motor is proposed in this paper. Different materials of slot wedge have different optimization effective for the motor. To obtain the best electromagnetic performance, fractional slot permanent magnet linear synchronous motor is taken as the research object, the influence of hard magnetic, soft magnetic and non-magnetic slot wedge on the air gap coefficient of the motor is calculated. Meanwhile, the air gap magnetic field, back electromotive force, cogging force and force ripple of three slot wedge materials are compared and analyzed by finite element method, and the degree of reducing thrust fluctuation under different loads is analyzed. The results show that the hard magnetic material can effectively reduce the cogging force and thrust fluctuation. Finally, the influence of hard magnetic materials on motor performance under different relative permeability is investigated, and the relative permeability value at the best performance of the motor is obtained, which provids a theoretical basis for further improvement of the motor performance.

Key words: permanent magnet linear synchronous motor, hard magnetic slot wedge, soft magnetic slot wedge, non-magnetic slot wedge, electromagnetic performance, finite element method

CLC Number: 

  • TP202