Patent ID: 9584049
Date: 2017-02-28
CPC Classifications: H02P

Claim:
1. A motor driving control method for controlling rotation of a motor by controlling an H-bridge circuit having: a first series circuit that includes first and second switching elements that are connected between a DC power source and a ground; a second series circuit that includes third and fourth switching elements, the second series circuit being connected in parallel to the first series circuit; and a motor coil of the motor which is connected between a connection node of the first switching element and the second switching element and a connection node of the third switching element and the fourth switching element, wherein the method comprising: a first step of, during a first energization control period, turning off each of the second and third switching elements, turning on or performing PWM control on the first switching element, and turning on the fourth switching element; a second step of, during a PWM control period after the first energization control period, performing PWM control on the first switching element with a predetermined on-duty for a predetermined number of times; a third step of, during a regeneration control period after the PWM control period, turning off the first switching element; a fourth step of, during a kickback suppression period after the regeneration control period, repeating for a predetermined number of times a first kickback suppression period and a second kickback suppression period, the second switching element being turned on and the fourth switching element being turned off during the first kickback suppression period, and the second switching element being turned off and the fourth switching element being turned on during the second kickback suppression period; and a fifth step of, during a second energization control period after the kickback suppression period, turning on the second switching element and turning on or performing PWM control on the third switching element.