| 摘要 |
PURPOSE:To prevent the failure of starting due to an incorrect timing of starting, by interrupting the starting while a magnet rotor is rotating. CONSTITUTION:In case amagnet rotor 5 is rotating though current feeding is stopped to an armature winding 4, the counter-electromotive voltage generates in the armature winding 4. On that account, the signal of relative position of the magnet rotor 5 is generated in the output of a counter-electromotive voltage detection circuit 6. An input change detection circuit 11 outputs an H-level signal when the output of the counter-electromotive voltage detection circuit 6 is generated. When the output of an input change detection circuit 11 is at H-level, a starting circuit 10 is controlled so as not to actuate the motor. |
