Fast 2-D Analytical Model for Axial-Field Flux-Switching Bar-Permanent Magnet Motor

Abstract

This study introduces a novel hybrid modeling approach that combines magnetic equivalent circuit (MEC) and 2-D analytical methods. The proposed method involves placing PMs on the stator bore in two forms: virtual permanent magnets (VPMs) or virtual volume currents (VVCs). To account for the effect of rotor teeth, analytical modeling is completed using virtual surface currents (VSCs). This hybrid modeling approach enables the calculation of the air gap magnetic flux density for the first time in an axial-field flux-switching bar-permanent magnet (AFFSBPM) motor. Because of the stator’s inner PM and doubly salient nature, the 2-D analytical model for AFFSBPMs is more difficult to solve. Therefore, the proposed method accurately with fast 2-D analytical by The Laplace/Poisson equations are solved and boundary conditions are applied to calculate the tangential and vertical flux components of the flux density distribution in the air-gap AFFSBPM motor. The 3-D finite element method (FEM) is used to verify the proposed method and the findings obtained.