| 摘要 |
PURPOSE:To smoothly start a motor by reducing a phase control value by a thyristor during the starting operation of the motor or stopping the phase control. CONSTITUTION:A current sensor 1 detects a load start from a starting current, and a timer 2 connected with the sensor 1 receives the signal to control a trigger circuit 3 of a phase controller A. The trigger circuit 3 is controlled by minimizing the phase control time while counting for the prescribed time from the input of a detection signal from the sensor 1 or stopping the phase control. Thus, it can be smoothly started, and the rotation control or electricity-saving can be performed at normal operation time. |
