基于永磁极间偏移的磁齿轮电机齿槽转矩削弱研究  

Research on Cogging Torque Reduction of Magnetic Gear Motor Based on Permanent Magnet Inter-polar Deflection

作　　者：刘玫 项子旋[1] 王腾光 朱孝勇[1] LIU Mei;XIANG Zixuan;WANG Tengguang;ZHU Xiaoyong(School of Electrical and Information Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《微电机》2021年第12期10-15,共6页Micromotors

基　　金：国家自然科学基金项目(51877099,51937006);中国博士后科学基金特别资助项目(2020T130256)。

摘　　要：本文将一种“极间偏移”的设计理念融入至磁齿轮电机的转子永磁拓扑设计之中,形成一类极间偏移式永磁转子,旨在实现对磁齿轮电机齿槽转矩的有效削弱。为了充分挖掘磁齿轮电机的齿槽转矩特性,文章从永磁体不同极间偏移形式的角度出发,提出了两种拓扑结构。相关研究立足于“磁场调制”的研究视角,在分析电机磁动势和磁导特性的基础上,针对电机的齿槽转矩进行了推导。经过定性分析,确定和选取了极间偏移角作为削弱电机齿槽转矩的关键参数,并且对其进行优化设计。通过对极间偏移角的合理设计,改变了磁齿轮电机的永磁磁动势特性,很大程度上促进了电机齿槽转矩的削弱。基于有限元计算,仿真分析了电机的齿槽转矩特性、空载反电势、输出转矩等性能。理论分析与研究结果验证了永磁体极间偏移式磁齿轮电机对齿槽转矩削弱设计的有效性。In this paper,the design concept of inter-polar deflection was incorporated into the permanent magnet(PM)rotor topology of magnetic gear motor(MGM)to form a type of inter-polar deflected PM rotor,which aimed to effectively reduce the MGM cogging torque.To fully explore the cogging torque characteristics of the MGM,two PM rotor topologies were proposed from the perspective of different PM inter-polar deflected forms.Based on the magnetic-field modulation theory,the analytical expressions of the MGM cogging torque were derived from the magnetomotive force-permeance characteristic.Through the qualitative analysis,inter-polar deflection angles were identified and selected as the key parameter to reduce cogging torque,and then optimal design was performed.With reasonable design of the inter-polar deflection angle,the PM magnetomotive force characteristics of MGM were improved,which greatly contributed to cogging torque reduction.The cogging torque characteristics,back electromotive force,and output torque of MGMs were simulated and analyzed by the finite element method.Theoretical analysis and research results verified the effectiveness of PM inter-polar deflected MGM for cogging torque reduction design.

关 键 词：齿槽转矩 极间偏移角 磁齿轮电机 磁场调制 

分 类 号：TM351[电气工程—电机]