Analysis of PM Vernier machine prototypes aimed at a direct drive operating of EV

Permanent magnet Vernier machines are well known for direct drive applications involving high torque and low speed operations. They have been studied in the case of in-wheel applications for electric vehicle but not as a direct drive single-motor configuration. In this paper, an inner rotor permanent magnet Vernier machine (PMVM) is designed and sized from a commercially available vehicle specification. Using 2D finite element model (FE), the performance of the machine is analyzed in terms of back emf, electromagnetic torque and power factor. Then, to improve the performance, four other prototypes of similar characteristics with distributed and concentrated windings are designed and studied. Their performances are compared with the ones of the initial machine.