Method for the reduction and modulation of noise of an electric motor

A method for noise modulation of an electric motor, wherein the electric motor is a multiphase synchronous motor driven by means of a motor control unit using a vector regulation, the method including:

• obtaining actual values for rotated current components id and iq in an open-loop control system, wherein id corresponds to a magnetisation current and iq corresponds to a torque-forming current of the synchronous motor;
• comparing the actual values with predetermined reference variables;
• converting, in a duty cycle for a pulse-width modulation (PWM) generator, via a first controller and a first transformation stage, differences between the actual values and the reference variables into control variables in order to regulate the actual values (iq, id) to the reference,
• wherein the magnetisation current-forming current component (id) is adapted by means of an acoustic controller to a desired acoustic state depending on an acoustic state that was measured by a measuring device and was transmitted by means of a signal output to the motor control unit, wherein the dq-current target variables are converted via a second controller and a second transformation stage into physical control variables that are corrected with the physical control variables of the open-loop control system after the first transformation stage.

A method for noise modulation of an electric motor, wherein the electric motor is a multiphase synchronous motor driven by means of a motor control unit using a vector regulation, the method including:

• obtaining actual values for rotated current components id and iq in an open-loop control system, wherein id corresponds to a magnetisation current and iq corresponds to a torque-forming current of the synchronous motor;
• comparing the actual values with predetermined reference variables;
• converting, in a duty cycle for a pulse-width modulation (PWM) generator, via a first controller and a first transformation stage, differences between the actual values and the reference variables into control variables in order to regulate the actual values (iq, id) to the reference,
• wherein the magnetisation current-forming current component (id) is adapted by means of an acoustic controller to a desired acoustic state depending on an acoustic state that was measured by a measuring device and was transmitted by means of a signal output to the motor control unit, wherein at least one acoustic variable is converted in the acoustic controller into a higher-order dimension.