Patent ID: 11967915
Assignee: HITACHI ASTEMO, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A motor control device which controls a drive of an AC motor that is connected to a power converter which converts power from DC power to AC power, and driven with the AC power, comprising:
a carrier wave generation unit which generates a carrier wave;
a carrier frequency adjustment unit which adjusts a frequency of the carrier wave; and
a gate signal generation unit which performs pulse-width modulation on a voltage command according to a torque command using the carrier wave, thereby generating a gate signal for controlling an operation of the power converter,
wherein the carrier frequency adjustment unit adjusts the frequency of the carrier wave so as to change a phase difference of the voltage command and the carrier wave based on the torque command and a rotation speed of the AC motor.