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.

Design and Experimental Validation of a New Outer Rotor Double PM Excited Flux Switching Generator for Direct Drive Wind Turbines

“…The armature winding electrical loading of the harmonic with ν -pole-pair is expressed in (7), in which m is the phase number, ph N is the phase turn number, k ων is the winding factor of ν th order, and max I is the maximum armature current value.…”

“…or PMs [7,8]. In the conventional topologies of FSPM machines, both the armature windings and the excitation system are located on the stator structure, and significant amounts of PMs are usually used in their structure [9,10].…”

Design and Optimization of the Dual-Stator Axial-Field Flux-Switching Permanent Magnet Motor with High-Torque Density and Low-cost

“…Different types of technology machines include axial and radial flux machines. Studies showed that axial flux machines (AFPM) have higher torque and power density (1)(2)(3), as well as efficiency (4-6). Axial field fluxswitching machines (AFFSPM) have limited torque density due to the location of PMs and coils, but still have higher torque and efficiency than radial flux machines and can reduce costs.…”