Rotor skew pattern design and optimisation for cogging torque reduction

This study examines the effects of different rotor skew patterns on the cogging torque, the excitation torque ripple, the average torque, and the axial force in an interior permanent magnet synchronous motor. A genetic algorithm is used to minimise the cogging torque for different skew patterns based on analytical functions. The optimal design obtained is verified with finite element analysis. The results show that the linear skew patterns …