Analytical Investigation and Topology Evolution of Rotor Salient Pole Reluctance in the Flux–switching Permanent Magnet Machine

Optimizing the rotor is a key issue in improving the torque performance of flux-switching permanent magnet (FSPM) machine. This paper investigates the contribution of rotor to cogging torque in a 12/10 FSPM machine using the general airgap field modulation theory (GAFMT). Then, two rotor configurations are proposed to reduce useless modulation orders theoretically. The multi-objective programming (MOP) is implemented for further optimizations and their effectiveness is verified through finite element analysis (FEA) results.