关键词: 永磁同步电机, 齿槽转矩, 极弧系数, 有限元

Abstract: A method was proposed to optimize the cogging torque of the motor by designing the motor pole arc coefficient. By deriving the cogging torque analysis formula, it was concluded that for the motor with fixed slots and poles, there was a fixed pole arc coefficient so that the motor cogging torque was zero or approximately zero. By simulating the arc coefficient and cogging torque of the motor with different rotor outer circle shapes and different magnet thicknesses, it was concluded that the pole arc coefficient was the key factor affecting the motor cogging torque, and for 12-slot 10-pole motors, when the pole arc coefficient was equal to or close to 0.6 or 0.8, the motor cogging torque was the smallest.

Key words: permanent magnet synchronous motor, cogging torque, pole arc coefficient, finite element