A 2D hybrid analytical electromagnetic model of the dual-stator axial-field flux-switching permanent magnet motor

Abstract

The two-dimensional (2D) analytical model for the calculation of the components of the flux density distribution in the air gap in a dual-stator axial-field flux-switching permanent magnet (PM) motor (DSAFFSPM) is presented. The novelties of this study are deriving a 2D hybrid analytical model and replacing the rotor teeth with some surface currents for the calculation of air-gap magnetic flux density for the first time in the DSAFFSPM motor. The 2D analytical model for DSAFFSPMs is more challenging due to the doubly salient structure and inner PM of the stator. 1D analytical interior PMs are first transferred to the bore of the stator body using the magnetic equivalent circuit model (MEC). Next, the effects of the rotor teeth are taken into consideration by injecting virtual surface currents for 2D analytical model. Applying boundary conditions and solving the Laplace/Poisson equations, the vertical and tangential flux components of the flux density distribution in the air-gap DSAFFSPM motor are computed. The verification of the proposed method and the obtained results are validated by the 3D finite element method.