| 摘要 |
PROBLEM TO BE SOLVED: To reduce vibration noise and at the same time to control a rotation speed without controlling a pulse width, by successively energizing each coil by a pulse with the maximum time width on activation, and by controlling the time width of a conduction pulse to each coil corresponding to speed and/or a torque value for intermittent conduction. SOLUTION: When an operator sets a desired speed at a speed command unit 1, a speed error amplifier 2 outputs a proper error signal to a control unit 3 based on a command signal being outputted from the speed command unit 1. The control unit 3 where the error signal is inputted outputs an optimum on/off signal to an output converter 4 while considering the position data of a rotor, detection speed data, detection torque data and the like being simultaneously inputted. At the output converter 4, current is energized to a stator coil at an optimum timing and conduction time, thus energizing a coil with the maximum time width on activation, controlling a conduction time width corresponding to a torque width for intermittent conduction, and controlling a rotation speed. |
