Analysis and Reduction of Cogging Torque for Flux-Switching Permanent Magnet Machines

In this article, a new modeling approach is proposed to investigate cogging torque and the corresponding reduction techniques of flux-switching permanent magnet (FSPM) machines. First, based on the superposition of each single rotor tooth, an analytical expression of cogging torque in FSPM machines is derived and confirmed by the finite-element analysis (FEA). Then, three feasible techniques, i.e....