DC BRUSHLESS MOTOR SET AND METHOD OF DRIVING THE SAME

PROBLEM TO BE SOLVED: To reduce noise and vibration by changing a energized wave form in steps with a simple logic circuit and by decreasing torque ripples, when energized. SOLUTION: With this method, a DC brushless motor is driven, which is provided with a rotor 11 comprising a drive magnet 12, a stator 21, a revolution detector 31 that detects the rotational position of the drive magnet 12, a stepped control magnet 13 attached to the rotor, and a step detector 32 that detects the rotational position of the stepped control magnet 13. In this case, when stoppage of conduction is shifted to a start and the end of conduction is shifted to a stop for a conducting period, the rotational positions of the drive magnet 12 and stepped control magnet 13 are detected. Moreover, the conducting polarity and conducting voltage are set in steps, so as to energize the stator in response to each combination of the detected data of the rotational positions.