Active control method for low-frequency vibration noise of variable-frequency power supply alternating-current motor

The invention discloses a low-frequency vibration noise active control method for a variable-frequency power supply alternating-current motor, and the method comprises the steps: enabling a target examination point vibration noise signal of the alternating-current motor and an electric characteristic spectrum signal of the motor to serve as the input of a self-adaptive filter; and the output is superposed to the reference quantity of the motor electric signal as a compensation value and participates in closed-loop driving control of the alternating-current motor. According to the method, the low-frequency vibration noise of the AC motor can be adaptively and actively controlled, so that the vibration noise amplitude of each characteristic line spectrum at the low-frequency band of the motor reaches the minimum value, the convergence speed is high, and the stability is high. 本发明公开了一种变频供电交流电机的低频振动噪声主动控制方法，将交流电机目标考核点振动噪声信号和电机电特征频谱信号共同作为自适应滤波器的输入，其输出作为补偿值叠加至电机电信号的参考量中并参与交流电机的闭环驱动控制。该方法可对交流电机的低频振动噪声进行自适应主动控制，使电机低频