基于齿削角的PMaSynRM齿槽转矩抑制分析

Analysis of tooth slot torque suppression based on the tooth chamfering in PMaSynRM

本文针对永磁辅助同步磁阻电机在降低齿槽转矩方面的需求,推导了齿槽转矩、气隙磁密和气隙磁导的解析表达式,通过表达式分析了齿槽转矩产生的机理。随后以一台样机为研究对象,通过有限元仿真,研究了不同齿削角宽度对齿槽转矩的影响。结果表明,齿削角可以改善气隙磁导的分布情况,显著降低齿槽转矩。

This paper introduces the analytical expressions of cogging torque,air gap magnetic density and air gap permeability by derivation for the demand of permanent magnet assisted synchronous reluctance motor(PMaSynRM)in cogging torque reduction.The mechanism of slot torque generation is analyzed.Subsequently,the effect of different tooth chamfering widths on the tooth slot torque was studied by finite element simulation with a prototype machine.The results show that the tooth chamfering can improve the distribution of the air gap permeability and significantly reduce the slot torque.