Comparative Study of Axial Flux Vernier Machine with SMC Cores for Electric Vehicle Application

Two high performance axial flux Vernier machines (AFVM) with soft magnetic composite (SMC) cores and one of that with silicon steel cores were proposed for electric vehicle application and quantitatively studied in this paper. By using 3D finite element method (FEM), the torque ability and power factor of above three machines have been optimized, and then the main performance are compared. With the combination of spoke magnet rotor structure and 3-D stator structure, the proposed AFVM1 can own the benefit of highest power factor when compared with other machines, and AFVM2 with double rotor configuration and 3D stator structure can have much higher torque ability comparing with the AFVM with silicon steel cores. It can be seen that with the adoption of SMC material the performance of traditional AFVM has been improved greatly.