Analysis of the effect of asymmetric magnetic barrier on torque ripple of built-in permanent magnet synchronous motor.

In this paper, a 37kW built-in permanent magnet synchronous motor (PMSM) is used as the research object. The finite element model of the original motor with asymmetric barrier structure is established. The effect of asymmetric magnetic barrier structure on torque ripple of motor is compared and analyzed. The influence of the design method of asymmetric magnetic barrier on the motor is analyzed from the harmonic direction of the reverse electromotive force. The results show that the asymmetric magnetic barrier design method can effectively reduce the torque ripple of the motor and improve the power density without sacrificing the output torque of the motor.