Analysis and Optimization of Equivalent Magnetic Circuit Model for a Hybrid Axial Field Flux-Switching Permanent Magnet Machine

Abstract

The hybrid axial field flux-switching permanent magnet machine (HAFFSPMM) is a novel hybrid excitation machine with the advantages of symmetric back-EMF waveform and high torque density. In this paper, the original nonlinear equivalent magnetic circuit (EMC) model of the HAFFSPMM is established, which exhibits that the no-load flux linkage and back-EMF calculated by the original model agree well with the results obtained through finite element method (FEM). Considering the end leakage of the permanent magnets (PMs), the EMC model is optimized. The analysis result shows that the optimized results coincide better with the FEM calculations. The flux regulation capability is analyzed by the optimized model, which further verifies the accuracy of the EMC model.