公开(公告)号：US6163129A

公开(公告)日：2000-12-19

申请号：US266549

申请日：1999-03-11

申请人： Charles T. Younger ,  Guy A. Moore ,  Peter J. Unsworth

发明人： Charles T. Younger ,  Guy A. Moore ,  Peter J. Unsworth

IPC分类号： H02P1/28 ,  H02P1/26 ,  H02P3/18 ,  H02P23/00 ,  H02P27/02 ,  H02P7/36

CPC分类号： H02P3/18 ,  H02P1/26 ,  H02P27/02

摘要： A method for controlling the starting, stopping and operation of an AC motor is provided. Each winding of the AC motor is interconnected to an AC source by a thyristor switch and a bypass contactor for providing voltage and current to the AC motor. The method includes a steps of sequently firing a pair of tyristor switches to bring the AC motor to full operating speed. Once at operating speed, the bypass contactors are closed. Upon detection of a voltage drop across a thyristor switch, the thyristor switch is fired immediately to transfer motor current from the bypass contactor to the thyristor switch in order to maintain voltage and current to the AC motor.

摘要翻译： 提供一种用于控制AC电动机的启动，停止和操作的方法。 AC电动机的每个绕组通过晶闸管开关和用于向AC电动机提供电压和电流的旁路接触器与AC电源互连。 该方法包括随后点燃一对可控硅开关以使AC电动机达到完全运行速度的步骤。 一旦处于运行速度，旁路接触器关闭。 当检测到晶闸管开关上的电压降时，晶闸管开关立即被激发，以将电动机电流从旁路接触器传递到晶闸管开关，以保持对电动机的电压和电流。