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This paper presents design optimization studies on high torque and high power density hybrid excitation flux switching motor (HEFSM) as a candidate for traction drives in hybrid electric vehicles (HEVs). Firstly, the construction and the basic working principle of the selected HEFSM are overviewed. Then, under some design restrictions and specifications for the target HEV drives, the initial performances of the selected HEFSM are evaluated based on 2D-FEA. As the initial motor fails to achieve the target performances, design parameters are set and treated by using deterministic optimization approach. After several cycles of iteration, the target torque and power of 333Nm and 123kW respectively, are achieved with much higher power density when compared with existing interior permanent magnet synchronous motor (IPMSM) used in HEV

Design Optimization Studies on High Torque and High Power Density Hybrid Excitation Flux Switching Motor for HEV