Method for attenuating vibrations of an electric machine

Abstract

The application discloses a motor vibration weakening method, the motor comprises a motor stator, a shell and a piezoelectric module, the motor stator is coaxially arranged with the shell, the outer circle radius of the motor stator is less than the radius of the shell, the piezoelectric module is arranged between the motor stator and the shell, the motor stator comprises a plurality of stator teeth, each stator tooth corresponds to a piezoelectric module; the method comprises the following steps: constructing the correlation between the voltage of the piezoelectric module and the force wave order corresponding to the second-order spatial force wave, obtaining a voltage order relationship; determining the second current vibration phase of the piezoelectric module based on the first current vibration phase of the motor stator; determining the current voltage of the piezoelectric module according to the second current vibration phase and the voltage order relationship; determining the target current of the piezoelectric module according to the current voltage, and controlling the input current of the piezoelectric module to be the target current. The motor vibration can be effectively avoided.

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