| 摘要 |
PURPOSE:To prevent a motor from starting in the reverse direction by fixing a rotor at the prescribed position at the starting time of the motor and then starting the motor. CONSTITUTION:The rotated state of a rotor 11 is detected by a comparator 14 with the induced voltage generated at the stator windings 15, 16, 17 of nonenergized state by the rotation of the rotor 11 during the operation of a motor. Energizing timing to stator windings 15, 16, 17 is controlling by a timer process on the basis of the input of a controller 10 in the rotated state. The prescribed stator windings 15, 16, 17 are energized for the prescribed time at the starting time of the motor, the rotor 11 is fixed to the prescribed position, and started. Thus, the start of the motor can be stably performed irrespective of the stopping position of the rotor. |
