METHOD FOR ACTIVE SUPPRESSION OF ELECTRIC MOTOR MAGNETIC NOISE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC H02P27/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and can be used in electric motors powered by an inverter. Reducing the noise and vibration of the motor powered by the inverter is achieved by reducing the harmonics of the electromagnetic force generated by the interaction of higher harmonics with the fundamental harmonic of the rotating magnetic field in the air gap of the motor, for which an additional compensation signal is added to the main reference signal in the PWM generation unit. The noise suppression device includes a vibration sensor, a fast Fourier transform unit with a bandpass filter, an amplifier, a phase shift compensator, a compensation signal shaper, a magnetization current calculation unit, and a Hall sensor.

EFFECT: reduction of vibration and noise of the electric motor.

3 cl, 3 dwg