Abstract: The hybrid excited segmental rotor flux switching permanent magnet（HESRFSPM）machine based

on eccentric pole was proposed. Under the condition of constant air gap area，the segmental rotor structure based on eccentric pole can reduce 2，4，10 radial air gap flux density space harmonic amplitudes by comparing air gap flux density space harmonic amplitudes. Hence，the structure can suppress torque ripple of HESRFSPM machine and reduce cogging torque under the premise of keeping the average output torque unchanged. The cogging torque，harmonics of back EMF and harmonic torque of HESRFSPM machine with different eccentric distances were

compared，and the eccentric rotor pole structure which can mostly suppress torque ripple was obtained. The prototype machine was also manufactured. Finally，the experimental results indicate that under the premise of keeping the average output torque unchanged，the torque ripple of HESRFSPM machine based on eccentric pole can be reduced by 5.14%，2.89% and 1.42% respectively at the flux weakened state，permanent magnet state and flux enhanced state.

      Key words: flux switching machine；eccentric pole；torque ripple