Analysis of the Influence of the Shape and Distribution of Permanent Magnets on the Torque Ripple of Surface Mounted Permanent Magnet Motors

With the improvement of energy saving and emission reduction requirements, the performance requirements of permanent magnet motors are getting higher and higher. Reducing torque ripple is an unavoidable problem for permanent magnet motors. Normally, the permanent magnets of permanent magnet motors are used in the axial direction. Permanent magnets of the same shape. In order to reduce torque pulsation, adopt different pole arc coefficients (Embrace), eccentricity (Offset) and pole width (pole width) combined magnetic poles in the axial direction of permanent magnet motors. The parametric simulation module uses the zooming algorithm to find the optimal combination, and finally achieves the goal of reducing torque ripple. The simulation results show that the optimization method can significantly reduce torque ripple.