| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller for brushless motor, capable of improving the precision of rotational speed control and stabilizing the driving control and rotational speed control of a motor at low-speed rotation. SOLUTION: This controller for brushless motor, including three sensors 11 to 13 detecting the rotational position of a rotor rotated by energization of a stator coil, is provided with multivibrators 20 to 22 occurring at the rise or fall time of the detected signals of the respective sensors 11 to 13, while the rotor is making one turn, an F/V converter 24 which F/V converts pulses outputted from the multivibrators 20 to 22 and outputting rotational speed signals, and a drive pulse modulator 27 comparing the rotational speed signals with a predetermined reference signal and performing rotational speed control. |
