摘要
针对磁钢磁化方式影响永磁电机空载气隙磁场性能的问题,建立了永磁电机空载气隙磁场的解析模型.通过对磁钢的两种充磁方式的分析,即径向充磁和两段式Halbach充磁,获得了永磁电机空载气隙磁密径向分量和切向分量的计算方法.选用一台1极12槽永磁有刷直流电机作为对象,利用解析模型计算了空载气隙磁密,通过与有限元仿真结果对比,验证了解析计算结果的正确性.在此基础上,计算了两种充磁方式下的空载气隙磁场径向磁密畸变率,结果显示:永磁有刷直流电机采用两段式Halbach充磁的畸变率明显低于径向充磁.同时,分析了极弧系数、磁钢厚度、极对数、槽口宽与径向磁密畸变率之间的关系,为永磁电机的初始设计提供了参考依据.
Based on the effects of magnetization of permanent magnet（PM）on the no-load air-gap magnetic field distribution,a PM motor analytical model of no-load air-gap magnetic field distribution was built.The method of radial and tangential flux density of no-load air-gap magnetic field were obtained by comparative analysis of two different magnetization manners,namely,radial magnetization and two-segment Halbach magnetization.A one-pole twelve-slot permanent magnetic DC motor was regarded as the object,and no-load air-gap magnetic field density was computed by using the analytical model.Compared with the results of FEA,the effectiveness of analytical model was confirmed.For this,the radial flux density distortion rate of no-load air-gap magnetic field under two different magnetization manners were calculated,and the results reveal that the radial flux density distortion rate of two-segment Halbach magnetization has an obvious low value than radial magnetization.The relations were analyzed between pole embrace ratio,magnet thickness,pole pairs,slot opening and radial flux density distortion rate,which provide bases for original design of PM motor.
出处
《湘潭大学自然科学学报》
CAS
北大核心
2015年第3期35-42,共8页
Natural Science Journal of Xiangtan University
基金
湖南省教育厅科学研究项目(11C0237)
关键词
磁化方式
解析模型
两段式Halbach充磁
空载气隙磁场
径向磁密畸变率
magnetization manners
analytical model
two-segment Halbach magnetization
no-load air-gap magnetic field
radial flux density distortion rate
