Torque Performance Enhancement for Hybrid PM Motor Considering Magnet Characteristic Difference and Variation

In this article, for the hybrid permanent magnet (HPM) motor using multipermanent magnet (PM) materials as excitation sources, considering the characteristic difference and coupling effect between magnet materials, a preliminary design of the hybrid PMs is presented to improve the PM utilization and the superposition rate of torque components. Besides, according to the magnet characteristic variation under different operation conditions of the motor, a multiobjective variable condition weighted optimization design method is carried out to further improve the torque performance, efficiency, and anti-demagnetization capability of the HPM motor.