基于磁场重构法的轴向磁通轮毂电机建模研究  

Research on the Modeling of Axial Flux In-wheel Motor Based on Magnetic Field Reconstruction Method

作　　者：李涛[1] 张幽彤[1] 梁玉秀 杨业 艾强 Li Tao;Zhang Youtong;Liang Yuxiu;Yang Ye;Ai Qiang(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081)

机构地区：[1]北京理工大学机械与车辆学院

出　　处：《汽车工程》2020年第1期81-87,93,共8页Automotive Engineering

摘　　要：轴向磁通轮毂电机具有功率密度大、效率高、轴向长度短等优点,但其特殊的三维结构使采用解析法或有限元法进行电磁设计时很难兼顾快速性与准确性。为减少计算量的同时提高计算结果的准确性,本文中以一台带非晶合金定子齿的无磁轭轴向磁通轮毂电机的详细设计为例,综合三维磁场重构法和麦克斯韦应力张量法,给出了轴向磁通轮毂电机气隙磁密的计算模型,推导了单侧转子轴向电磁力和电磁转矩的计算式,分析了定子磁链以及反电动势波形。通过三维瞬态有限元分析对三维磁场重构法的计算值进行了验证,结果表明,三维磁场重构法在减少计算时间的同时,具有较好的精度。The axial flux of the in-wheel motor has the advantages of high power density, high efficiency and short axial length. However, its special 3 D structure makes it difficult to concurrently achieve both rapidity and accuracy in electromagnetic design by analytical method or finite element method. In order to reduce the computation efforts while improving the accuracy of results, taking the detailed design of a yokeless axial flux in-wheel motor with amorphous alloy stator tooth as an example, the calculation model of its air-gap flux density is given by combining 3 D magnetic field reconstruction method with Maxwell stress tensor method. The calculation formulas for the axial electromagnetic force of lateral rotor and electromagnetic torque are derived, and the waveform of stator magnetic linkage and back electromotive force are analyzed. The results of 3 D field reconstruction method are verified by 3-D transient finite element analysis. The results show that 3 D field reconstruction method has good accuracy with less calculation time.

关 键 词：轴向磁通电机 轮毂电机 磁场重构法 麦克斯韦应力张量法 

分 类 号：TM30[电气工程—电机]