Patent ID: 9065364
Filing Date: 2015-06-23
Classification: B62D,H02P

Abstract:
1. A motor control device comprising: motor drive means for driving a motor; a PWM modulation unit that detects a motor current; and a controller to which a motor current detection value using motor current detection means is input and which outputs a drive signal to the motor drive means, wherein the controller includes power supply voltage detection means for detecting a power supply voltage, a power supply voltage drop determination means for determining power supply voltage drop, and the PWM modulation unit that supplies the motor current to the motor drive means using PWM modulation, wherein in order to control the motor drive means, the power supply voltage drop determination means determines whether or not the power supply voltage is a predetermined voltage drop determination value or less, sets the maximum value of a PWM duty ratio to a first specified value when the power supply voltage is the predetermined voltage drop determination value or more, and sets the maximum value of the PWM duty ratio to a second specified value which is smaller than the first specified value when the power supply voltage is the predetermined voltage drop determination value or less.