Electromagnetic analysis of a novel axial-field switched flux hybrid magnet memory machine

This paper proposes an axial field switched flux hybrid magnet memory machine (AF-SF-HMMM). Compared with conventional axial field permanent magnet (PM) machines having PMs in rotor side, the AF-SF-HMMM benefits from good heat dissipation and high rotor robustness power density. Meanwhile, because both high-energy-product neodymium-iron-boron (NdFeB) PM and low coercive force (LCF) PM materials are used simultaneously, the proposed machine can flexibly regulate air-gap flux without much sacrificing its high torque capability, which is particular suitable for electric vehicular applications. Based on 3-dimensional (3-D) finite element analysis (FEA), the electromagnetic performance of the machine is numerically investigated. It shows that the proposed machine features high torque density and well sinusoidal flux linkages and back electromotive force (EMF).