关键词: 永磁同步电机, 径向电磁力, BP 神经网络, 不对称齿顶, 振动噪声

Abstract: The radial electromagnetic force with complex space-time distribution between the stator and rotor of the motor acts on the stator tooth top and causes the vibration and noise of the motor. Taking a high-speed motorized spindle motor as an example, the stator model of the motor was established by using the parametric modeling method. Torque ripple and average torque of the motor were preliminarily optimized by using the BP neural network intelligent algorithm and the finite element method. An optimized structure of asymmetrical tooth top was proposed to weaken the radial electromagnetic force with large amplitude of stator tooth top. The results show that the method can effectively reduce the electromagnetic vibration of permanent magnet synchronous motor.

Key words: permanent magnet synchronous motor, radial electromagnetic force, BP neural network, asymmetrical tooth top, vibration noise