Method to eliminate even harmonics in flux-switching permanent magnet machines

This paper presents an analytical method to realize even order harmonic elimination in flux-switching permanent magnet machines. The proposed method enables the calculation of total offset angle of flux linkages, taking into account an offset angle of stator slot and rotor poles. The 6-slot, 12-slot, and dual structure flux-switching permanent magnet machines are analyzed using the proposed method which is verified by finite element analysis. The advantage of the proposed method is that it clearly explains the reason for different winding configurations of even and odd number of rotor poles flux-switching permanent magnet machines.