基于极弧系数和分段斜极选择的五相永磁电机齿槽转矩削弱方法研究  

The Method for Reducing Cogging Torque by Suitable Selection of the Pole-arc Coefficient and Rotor Step Skewing in Five-phase Permanent Magnet Motor

作　　者：高蒙真 杨向宇[1] 蒋思远 田兵 赵世伟[1] 曹江华[1] 张紫凡 GAO Mengzhen;YANG Xiangyu;JIANG Siyuan;TIAN Bing;ZHAO Shiwei;CAO Jianghua;ZHANG Zifan(School of Electric Power Engineering,South China University of Technology,Guangzhou 510641,Guangdong Province,China;College of Automation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu Province,China)

机构地区：[1]华南理工大学电力学院,广东省广州市510641 [2]南京航空航天大学自动化学院,江苏省南京市211106

出　　处：《中国电机工程学报》2023年第22期8922-8934,共13页Proceedings of the CSEE

基　　金：江苏省创新创业博士项目(JSSCBS20210175)。

摘　　要：齿槽转矩的削弱是优化电机性能和提高系统稳定性的基础。为了削弱五相永磁同步电机(five-phase permanent magnet motor,FPPMM)的齿槽转矩,该文提出一种多参数复合的转子结构优化设计方法。基于能量法和傅里叶分解,推导能明确表达齿槽转矩与极弧系数和分段斜极关系的齿槽转矩表达式。在此基础上,提出最佳极弧系数的预测模型,给出不同转子磁极分段数下最佳斜极角度的确定方法。采用曲面响应法,建立极弧系数、转子磁极分段数和斜极角度与多个优化目标之间的数学模型,求解数学模型得到复合极弧系数、转子磁极分段数和斜极角度的最优转子结构参数组合。基于优化前后电机结构参数建立有限元模型,对比优化前后电机的空载气隙磁密、空载反电势和齿槽转矩等性能参数。最后,基于优选参数制造样机并进行试验,验证上述理论分析的正确性和优化设计的有效性。The reduction of cogging torque is the basis of optimizing motor performance and improving system stability.To minimize the cogging torque of the five-phase permanent magnet motor,this paper proposed a multi-parameter compound optimization method based on the rotor structure.The energy method and Fourier expansion is utilized to deduce the cogging torque expression,in which relationship between the cogging torque,the pole-arc coefficient and rotor step skewing are revealed.Then,the prediction model of optimal pole-arc coefficient is offered,and the method to determine the optimal skewing angle corresponding to different permanent magnet segments is given.Furthermore,the response surface method is adopted to establish the mathematical models between the pole-arc coefficient,rotor step skewing and optimization objectives.The optimal rotor structure parameters are obtained by solving the mathematic models.Based on the structural parameters of the motor before and after optimization,finite-element models are established.Where after,some performance parameters of the initial and optimal motors are compared,which include no-load air-gap flux density,no-load back electromotive force(EFM)and cogging torque.Finally,a prototype is manufactured based on the optimal parameters,and the experimental research is carried out to verify the correctness of theoretical analysis and the effectiveness of optimization design.

关 键 词：五相永磁电机 齿槽转矩 分段斜极 极弧系数 响应曲面法 

分 类 号：TM352[电气工程—电机]