Patent ID: 9331612
Filing Date: 2016-05-03
CPC Classification: B62D,H02P

Claim Text:
1. A motor control apparatus comprising: an inverter circuit comprising: a single current detector that detects a current of the motor flowing through the inverter circuit; a duty calculator that calculates duties of PWM signals for turning the switching elements ON or OFF on the basis of a deviation between a current value of the current detected by the current detector and a target current value; a PWM signal generator that generates a plurality of PWM signals corresponding to a plurality of PWM cycles for respective phases within one control cycle comprising the plurality of PWM cycles on the basis of the duties calculated by the duty calculator, and outputs the PWM signals to the switching elements respectively; and a phase shift unit that shifts the phases of the PWM signals generated by the PWM signal generator gradually within one control cycle, wherein the PWM signal generator generates and outputs PWM signals comprising calculated duties after the duty calculator calculates the duties of the PWM signals in the respective phases before the phase shift unit starts phase shifting.