优化极弧系数和磁极偏移对齿槽转矩影响的研究  

Minimisation of Cogging Torque in Permanent Magnet Machines-Influence of Optimal Magnet Pole-arc and Magnet Shifting

作　　者：王春梅[1] 王艾萌[1] 王慧[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003

出　　处：《微电机》2014年第10期1-5,共5页Micromotors

基　　金：河北省自然科学基金(E2012502018);中央高校基本科研业务费专项资金(13MS76)

摘　　要：研究优化极弧系数和磁极偏移对永磁电机齿槽转矩的影响,得出磁极偏移后齿槽转矩的表达式。并用有限元方法分析了一台6极电机的两种磁极偏移方法,得出最优极弧系数后,接着采用磁极偏移方法减小齿槽转矩,结果表明将这两种方法结合能极大地减小齿槽转矩。最后通过试验结果与有限元结果的对比分析,验证此方法的有效性,该方法能很好地削弱齿槽转矩。This paper studied the minimisation of cogging torque in permanent magnet machines-influence of optimal magnet pole-arc and magnet shifting. The expressions of the cogging torque for displacing one of the magnets were obtained. A 6-pole motor which could be shifted in two different ways was investigated with finite-element analysis. The results showed the cogging torque could be reduced significantly by magnet shifting which was employed after the optimal magnet pole-arc to pole-pitch ratio was selected. Finally,the comparisons between experimental results and the results of finite-element analysis verified the validity of this method which could weaken the cogging torque effectively.

关 键 词：永磁电机 齿槽转矩 最优极弧系数 磁极偏移 

分 类 号：TM351[电气工程—电机]