关键词: 永磁同步电动机, 结构优化, 齿槽转矩, 遗传算法

Abstract: PMSM has better dynamic response and higher power density. Due to the cogging torque, which is produced by the interreaction of permanent magnet and iron core, the output torque will fluctuate. The optimization of the cogging torque is extremely important. In order to reduce cogging torque, several parameters, which closely related to cogging torque, were selected and analyzed by analytical method. An improved genetic algorithm combined with finite element method was used to optimize cogging torque of PMSM. The results showed that compared with the original design, the cogging torque was greatly reduced by the algorithm and did not excessively influence the output torque.

Key words: permanent magnet synchronous motor (PMSM), structure optimization, cogging torque, genetic algorithm