Analytical Modeling and Cogging Torque Weakening of Permanent Magnet In-Wheel Motor for Electric Vehicles

被引：0
|
作者：
Yang J. [1 ]
Deng Z. [2 ,3 ]
Zhou Y. [1 ]
Zhang H. [3 ]
Tan T. [3 ]
机构：
[1] College of Mechanical Engineering, Chongqing University, Chongqing
[2] State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing
[3] School of Automotive Engineering, Chongqing University, Chongqing
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2018年 / 52卷 / 01期
关键词：
Analytical model; Auxiliary slots; Cogging torque weakening; Permanent magnet in-wheel motor;
D O I：
10.7652/xjtuxb201801013
中图分类号：
学科分类号：
摘要：
To improve the efficiency of design and optimization of permanent magnet motors and avoid lengthy finite element modeling and computing time, an analytical model of surface-mounted permanent magnet motor with auxiliary slots is built. The Laplace equations or Poisson equations are established in each subdomain with the vector magnetic bit as a function in the two-dimensional polar coordinates, and the vector magnetic bit expression of each subdomain is solved according to the separation variable method. The relevant harmonic coefficients are obtained using the boundary conditions of each subdomain. The air gap flux density, cogging torque, flux linkage and back-electromotive force(EMF) of the model are deduced under no-load condition, then the air gap flux density, cogging torque, flux linkage and EMF of a 32-pole-48-slot external rotor in-wheel permanent magnet motor used for electric vehicles are calculated under no-load condition. The accuracy and validity of the analytical model are verified by finite element method and cogging torque experiment. In addition, the cogging torque of the in-wheel motor is optimized on the basis of this analytical model, and is consequently reduced by 37.2%. © 2018, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
引用
收藏
页码：84 / 91and114
相关论文
共 15 条
  • [1] Cheng M., Sun L., Buja G., Et al., Advanced electrical machines and machine-based systems for electric and hybrid vehicles, Energies, 8, 9, pp. 9541-9564, (2015)
  • [2] Schmidt S., Krocker K., Lunig M., Et al., An analysis of the cogging torque of a DC motor and a new technique of reducing the cogging torque, Electrical Engineering in Japan, 103, 5, pp. 113-120, (1983)
  • [3] Kobayashi K., Goto M., A brushless DC motor of a new structure with reduced torque fluctuation, Electrical Engineering in Japan, 105, 3, pp. 104-112, (1985)
  • [4] Guo S., Zhou L., Analytical solution of magnetic field in surface-inset permanent magnet machines, Proceedings of the CSEE, 35, 3, pp. 710-718, (2015)
  • [5] Li C., Zhang Y., Jing L., Researches on an exact analytical method of Halbach-array permanent-magnet motors with semi-closed slots, Proceedings of the CSEE, 33, 33, pp. 85-94, (2013)
  • [6] Wang X., Jia X., Optimization for the slot opening to reduce cogging torque in high-power BLDC in electric vehicles, Transactions of China Electrotechnical Society, 28, 6, pp. 40-45, (2013)
  • [7] Hao L., Lin M., Xu D., Et al., Cogging torque reduction in axial field flux-switching permanent magnet machines, Transactions of China Electrotechnical Society, 30, 2, pp. 21-26, (2015)
  • [8] Huang K., Li H., Zhou Y., Method research for reducing the cogging force by auxiliary slots, Electric Machines and Control, 18, 3, pp. 54-59, (2014)
  • [9] Chen Z., Xia C., Wang H., Modeling for open circuit magnetic field prediction in slotted surface-mounted permanent-magnet machine, Transactions of China Electrotechnical Society, 29, 5, pp. 9-16, (2014)
  • [10] Zhou Y., Li H., Zhou S., Et al., Analytical method for calculating air-gap magnetic field of brushless DC motor accounting for slots, Proceedings of the CSEE, 34, pp. 182-188, (2014)
12