基于转子齿偏移的四相横向磁通永磁电机齿槽转矩削弱方法  

Cogging Torque Reduction of Transverse Flux Permanent Magnet Motors by Shifting Rotor Teeth

作　　者：张昌锦 陈志辉[1] 梅庆枭 段津津 ZHANG Changjin;CHEN Zhihui;MEI Qingxiao;DUAN Jinjin(Nanjing University of Aeronautics and Astronautics, Nanjing 211100, Jiangsu Province, China)

机构地区：[1]南京航空航天大学自动化学院

出　　处：《中国电机工程学报》2018年第12期3680-3687,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51677090)~~

摘　　要：提出一种基于转子齿偏移的方法,有效削弱横向磁通永磁电机齿槽转矩。运用傅里叶级数分析了四相横向磁通永磁电机齿槽转矩的表达式,并以此为基础给出了转子齿偏移角度的计算公式。由于该电机结构特殊,单元结构中的两相耦合度高且漏磁系数较大,使得解析方法的计算结果存在误差。为了得到更精确的偏移角度,采用有限元方法对计算所得偏移角度进行修正仿真。此外,还研究了转子齿偏移之后对电机性能的影响,并得出结论：该优化方法能有效削弱齿槽转矩,显著减小电机转矩脉动。同时,结合横向磁通电机的特点,提出了增加齿宽的方法以解决电机优化过程带来的电机出力减小的问题。This paper proposed a method to minimize the cogging torque of a transverse flux permanent magnet motor（TFPMM） by shifting its rotor teeth. Fourier series analysis was utilized to analyze the expression of cogging torque, and then an analytic formula of the shifting angle was offered. However, due to the motor＇s special structure, the leakage flux and the fact that each phase of the motor was not completely decoupled, the result was just only approximate. To get the exact angle, the finite element method（FEM） was adopted to make modification. Finally, the impacts of the method was studied and it could be drawn a conclusion that the optimization method can significantly reduce the cogging torque and improve the torque ripple. And, in consideration of the structure of transverse flux motor, the problem of reducing the motor output torque caused by the optimization of the motor was solved by increasing the tooth width.

关 键 词：齿槽转矩 傅里叶级数 横向磁通永磁电机 有限元法 

分 类 号：TM351[电气工程—电机]