Method For Noise Reduction During Operation Of An Electric Motor, And Motor Control Device For Controlling The Operation Of An Electric Motor Involving Noise Reduction

A motor control device for controlling the operation of an electric motor using a noise reduction method, the device comprising:

• a control circuit to control an actual value of a control variable setting a rotary drive of the electric motor to a corresponding setpoint value;
• a sensor to determine an instantaneous rotational frequency of the electric motor from a signal representative of a rotational position and/or a rotational speed of the electric motors;
• a filter device to filter a frequency component from the rotation signal, the frequency of which corresponds to the instantaneous rotational frequency of the electric motor multiplied by a specified factor greater than 1 and lying within a specified acoustic frequency range;
• and
• a correction signal generating device to generate a correction signal based on the interference signal and to feed this correction signal into the control loop so an amplitude of the interference signal is reduced.