| 摘要 |
PROBLEM TO BE SOLVED: To reduce the rotary irregularities of a motor by switching a phase according to a phase-switching timing signal from a phase-switching timing signal generation means and driving a motor, based on a PWM clock that is generated from a PWM signal generating means. SOLUTION: A driver 102 for driving a motor switches a phase according to a phase-switching timing signal from a phase-switching timing signal generation part 101 and drives a motor 103, based on a PWM clock that is generated from a PWM signal generation part 104. At this time, a PWM clock that is generated from the PWM signal generation part 104 is synchronized with a phase-switch timing by a synchronization means 105, thus making equal the number of PWM drive pulses in each phase and also making equal the time from the phase-switch timing to a first drive pulse in each phase and hence improving the accuracy and stability of the rotary speed control of the motor. |
