关键词: 电动汽车, 轮毂电机, 高转矩密度, 电磁设计

Abstract: According to the requirement of high torque density and strong heat dissipation of in-wheel motor for the distributed drive electric vehicles, a in-wheel motor was designed. The electromagnetic design scheme of the in-wheel motor was expounded. The motor’s performance parameters of no load and load were obtained by finite element modeling and simulation. The mechanical structure design and heat dissipation analysis were carried out, and a forced heat dissipation method was proposed to effectively reduce the temperature rise of the motor. A prototype was developed and experiments were conducted. The test results show that, the performance of in-wheel motor was consistent with the theoretical calculations and met the design requirements. The in-wheel motor has the characteristics of high torque density and good heat dissipation performance. The correctness of the design scheme and the feasibility of the method were verified.

Key words: electric vehicle, in-wheel motor, high torque density, electromagnetic design