The magnitude of vibration and noise is one of the indexes to measure the quality of household variable frequency air conditioning compressor. In order to solve the problem of high frequency noise of the household variable frequency air conditioning compressor, a permanent magnet synchronous motor with 6pole 9slot for household air conditioning compressor and its control system are used as the research objects. Based on the fieldcircuit coupling method, the harmonic current components and high frequency acoustic vibration response characteristics introduced by conventional space vector pulse width modulation (SVPWM) technology and its control strategy are studied. Firstly, the generation mechanism of high frequency noise source of permanent magnet motor is analyzed by analytic method. Secondly, the effect of current harmonics on the order and frequency characteristics of radial electromagnetic force wave is described in principle. Then, the fieldcircuit coupling model of permanent magnet motor is established, and the relationship between high frequency radial electromagnetic force wave frequency and switching frequency under different load conditions is analyzed in detail. Finally, the acoustic vibration characteristic test is used to verify the results. The results show that the fieldcircuit coupling model can consider the high frequency harmonic current caused by nonlinear factors such as motor body, control strategy and switching frequency, and relationship of the high frequency radial electromagnetic force wave frequency and the carrier frequency is obtained, which provides reference for high frequency noise prediction and vibration and noise reduction of permanent magnet motor.