| 摘要 |
PROBLEM TO BE SOLVED: To suppress vibration and noise of a motor by suppressing generation of a kickback phenomenon at energization switching for changing a direction of a coil current of the motor.SOLUTION: An H bridge circuit 2 comprises: a series circuit of switch elements Q1 and Q2; and a series circuit of switch elements Q3 and Q4 connected in parallel to the series circuit of switch elements Q1 and Q2. The H bridge circuit 2 controls the driving of a motor 20. A method executes: a step of turning off the switch elements Q2 and Q3; a step of turning on or PWM-controlling the switch element Q1, and turning on the switch element Q4; a step of PWM-controlling the switch element Q1; a step of turning off the switch element Q1; a step of repeating a first kickback suppression time period in which the switch element Q2 is turned on and the switch element Q4 is turned off, and a second kickback suppression time period in which the switch element Q2 is turned off and the switch element Q4 is turned on, a predetermined the number of times; and a step of turning on the switch element Q2 and turning on or PWM-controlling the switch element Q3. |
