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Switched Reluctance Motor Design for an EV Propulsion Application

This paper introduces a design methodology for a Switched Reluctance Motor (SRM) for an 80 kW Battery Electric Vehicle (BEV) propulsion application. The methodology aims to satisfy the high power density requirement targeted for an electric motor for a BEV application, while maintaining improved efficiency and torque quality. Iterative modeling effort has been employed for the design, including finite element analysis for the electromagnetic characteristics of the motor and dynamic modeling for performance analyses. The design approach starts with determining the motor geometry followed by sensitivity analysis for the motor performance considering various motor parameters. Then the SRM conduction angles are optimized with multi-objective genetic algorithm to improve the torque density and reduce torque ripple. The performance is further analyzed and compared to the target motor.