关键词: 槽口型永磁直线电机, 有限元分析, 多目标优化

Abstract: The magnetic gathering slot PMLM is a new type of linear motor with permanent magnet placed in the primary side slot, which is suitable for low speed and high thrust application. In the process of operation, the motor will inevitably produce large electromagnetic force fluctuations. A new bilateral structure was proposed. The working principle of the motor and the factors affecting the electromagnetic force fluctuations were analyzed, and the finite element method and analytical method were combined. The effects of silicon steel sheet thickness, secondary height, permanent magnet thickness, primary tooth width and secondary slot width on motor thrust magnitude, thrust and normal force fluctuation were
analyzed successively. Based on response surface method, the final motor optimization parameters were obtained to reduce thrust and normal force fluctuation and ensure large thrust as optimization objectives, and the motor characteristics before and after optimization were compared and analyzed.

Key words: slot permanent magnet linear motor( PMLM), finite element analysis, multi-objective optimization