Exact Analytical Solution of Magnetic Field in Permanent Magnet In-Wheel Motor
Yang Dingwei1, Deng Zhaoxiang1, Zhang Heshan1, Yang Minglei2, Yu Feng1
1. School of Automotive Engineering Chongqing University Chongqing 400044 China; 2. School of Mechanical Engineering Chongqing University Chongqing 400044 China
Abstract：One exact analytical model method for considering the magnetic permeability of magnetically conductive material in a permanent magnetic motor was given by using harmonic modeling, and the electromagnetic performance of the motor was analyzed. In the two-dimensional polar coordinate, the motor was divided into four domains: the permanent magnet, the air gap, the stator tooth/slot and the stator tooth tip/slot opening. The Poisson and Laplace equations were established in each solution domain, and the harmonic coefficients in the general solution were obtained by the boundary conditions, and the analytical expression of vector magnetic potential in each domain was obtained. The electromagnetic performance of air gap magnetic flux density, no-load back EMF, output torque and so on were calculated. The correctness of this analytical model method was verified by comparison with the finite element method and experiment test results. The model was used to study the influence of the pole arc coefficient and slot opening width on the output torque.
杨定伟, 邓兆祥, 张河山, 杨明磊, 于锋. 永磁轮毂电机磁场解析建模[J]. 电工技术学报, 2019, 34(7): 1423-1433.
Yang Dingwei, Deng Zhaoxiang, Zhang Heshan, Yang Minglei, Yu Feng. Exact Analytical Solution of Magnetic Field in Permanent Magnet In-Wheel Motor. Transactions of China Electrotechnical Society, 2019, 34(7): 1423-1433.
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2019, Vol. 34 
