Patent ID: 9263976
Filing Date: 2016-02-16
CPC Classification: B62D,H02P

Claim Text:
1. A motor control apparatus comprising: an inverter circuit including a switching element for driving a motor by turning ON/OFF the switching element; a PWM signal generation unit that generates a PWM signal for turning ON/OFF the switching element; a carrier signal generation unit that generates a carrier signal necessary for generating the PWM signal; a physical quantity detection unit that detects a predetermined physical quantity of the motor, which is generated with drive of the motor; a command value calculation unit that calculates a command value with respect to the physical quantity of the motor; a plurality of duty calculation units, each of which compares a value of the physical quantity detected by the physical quantity detection unit with the command value calculated in the command value calculation unit and calculates a duty of the PWM signal based on a deviation between the value of the physical quantity and the command value, wherein the plurality of duty calculation units perform the duty calculations in time division; and a duty setting unit that performs setting of the duty based on the duty calculated by the plurality of duty calculation units, wherein the duty setting unit maintains a present duty until new duty is input from any one of the plurality of duty calculation units, and updates the duty from the present duty to the new duty when the new duty is input from any one of the plurality of duty calculation units, and wherein the PWM signal generation unit generates the PWM signal based on the duty set by the duty setting unit and the carrier signal generated by the carrier signal generation unit.