A novel structure of axial flux permanent magnet synchronous machine with high torque density for electrical vehicle applications

Axial flux permanent magnet synchronous machine (AFPMSM) is a good candidate for electric vehicles (EVs) as in-wheel machine. Meanwhile, promoting the torque density of in-wheel AFPMSM is one of the most concerned issues in EV applications. This paper presents a novel structure of in-wheel AFPMSM with a higher torque density compared with the traditional structure and proposes a design method of the new structure by analyzing the material utilization rate (MUR) of yokes. The sizing equations of the new structure are also given in this paper. Simulation results are provided for validation.

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