Vector Magnetic Circuit Based Equivalent Magnetic Network for Flux-Switching Permanent Magnet Machines

Abstract

Flux-switching permanent magnet (FSPM) machines hold considerable potential in automobile industry due to the simple rotor topology and relatively higher torque density. Extensive performance evaluation is critical to realize the commercialization of FSPM machines in the design stage, and employing a time-saving and store-efficient method is becoming more and more paramount. From this perspective, this paper proposes a vector magnetic circuit based equivalent magnetic network (VMC-EMN) method, where the eddy current effect in the iron core on the flux is taken into account by using a new magnetic component of magductance (or magnetic-inductance) for the first time. By introducing the magductance component, the proposed VMC-EMN method exhibits satisfactory accuracy and speed in assessing the electromagnetic performance of FSPM machines, particularly in terms of the torque and the eddy current loss. Moreover, two FSPM machines with different power levels are analyzed to illustrate the modeling and implementation processes of the proposed VMC-EMN method. Finite element analysis and experimental results are provided simultaneously to validate the effectiveness of the VMC-EMN method. The results obtained by traditional reluctance-based network are compared as well to highlight the superiority of the proposed method.