计及间隔的组合磁极无刷直流电机优化设计

本文提出一种永磁磁极间隔和组合磁极相结合的新型永磁无刷直流电机转子磁极结构,利用多块不等磁能积的永磁体替代每极的单块永磁体,在降低稀土永磁材料用量的同时,改善相绕组反电动势波形。本文针对四极无刷直流电机,依据主副磁极的位置形状和剩磁强度比例,以空载反电动势正弦化程度为优化目标,采用田口法对选定的优化参数进行正交试验。评估各个参数对优化目标的权重比例,从而选定优化设计方案,通过有限元仿真结果验证了该优化方法可有效提高电机性能。

Optimization Design of BLDC Motor Based on Modular Pole with Several Parts

In order to reduce the harmonic content of the Back-EMF,an novel rotor of BLDC motor model with modular pole and magnet segmentation which has several parts instead of one part per pole is presented.Base on the permanent magnet shape and materials,the sinusoidal degress of back-EMF and the amplitude of back-EMF were set as optimal objects.Then,the Taguchi method was introduced into the optimization of this model.By analyzing the effect of this BLDC motor's performance caused by the variable of the optimal parameters,the optimal scheme was deduced.The results of the FEA verified the optimal performance of this model.