In order to analyze and study the electromagnetic noise caused by the permanent magnet synchronous motor radial electro-magnetic force wave acting on the stator teeth,an electromagnetic noise simulation model based on field-circuit coupling is estab-lished,and the electromagnetic noise is solved and optimized based on this model.First,the field-circuit coupling model is used to solve the radial electromagnetic force wave of the motor as the load excitation of the motor vibration and noise simulation;then the modal superposition method and the boundary element method are used to simulate the electromagnetic noise of the motor,and the A-weighted sound pressure level results are compared with the experimental data.A comparative analysis is carried out;finally,the opti-mal parameters of the auxiliary slot are determined based on the response surface method,and two arc-shaped auxiliary slots are opened on the outside of the rotor based on this parameter to optimize the electromagnetic noise of the motor.Experimental and simula-tion results show that the electromagnetic noise simulation model based on field-circuit coupling can more accurately simulate the high-frequency noise of the motor,and the reasonable selection of auxiliary slot parameters can significantly improve the electromag-netic noise of the motor,which reduces the A-weighted sound pressure level by more than 3dB.
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