Magnetic Circuit Analysis of the Low-Cost in-Wheel Switching Flux Motor for HEV Applications

This paper presents the design and analysis of Permanent Magnet Switching Flux Motor (PMSFM) for hybrid electrical vehicle application. The design is intended to obtain a cost effective, efficient motor with small flux leakage, low cogging torque, and high power to mass ratio. For this reason, two configurations of the motor - with inner and outer rotor - are proposed. The performance characteristics of the two models are compared in terms of the electromagnetic torque, cogging torque, and back EMF using 3-D Finite Element Analysis (FEA). To further validate the proposed design, the performance of the motor has been verified by experimental measurements on the single phase motor prototype.