ELECTRIC MOTOR CONTROL DEVICE Russian patent published in 2011 - IPC H02P6/10 H02P21/00 H02P27/08 B60L9/16 

FIELD: electricity.

SUBSTANCE: in control device (100) for synchronous electric motor with constant magnets the asynchronous pulse mode is switched over to synchronous pulse mode in the situation when modulation coefficient becomes equal to or higher than the first specified value, or when output frequency of inverter (2) becomes equal to or higher than the second specified value. Synchronous pulse mode is switched over to asynchronous pulse mode in the situation when modulation coefficient becomes less than the first specified value, as well as output frequency of inverter (2) becomes less than the second specified value. When setting the second specified value so that the number of pulses included in half-period of the main sinusoid of output voltage of inverter (2) is equal to or higher than the pre-determined value, it is possible to prevent current oscillations and torque moment pulsations in electric motor.

EFFECT: providing stability of control by reducing current oscillations and torque moment pulsations and reducing noise and vibrations at control of electric motor.

13 cl, 7 dwg