Analytical Modeling of a Flux Switching Permanent Magnet Machines

Flux Switching Permanent Magnet machines have attracted considerable attention due to their simple and robust structure, easy heat dissipation, high torque densities and suitability for high-speed operations. To enhance these proprieties, we present in this paper an analytical model for prediction of the magnetic field for a 3 phase, 12 stator slots and 10 rotor tooth (12/10) flux switching permanent magnet machine. The proposed model is based on an two dimensional analytical solution of Maxwell equations in low permeability regions using the variable separation method. The global quantities can be derived from the local magnetic field expression. The computation provides exact results in relatively short resolution times. Finally, the accuracy of the model is validated by comparing the analytical results with those obtained with a finite element analysis.