公开(公告)号：US4533857A

公开(公告)日：1985-08-06

申请号：US413394

申请日：1982-08-31

申请人： Ten-Ho Chang ,  Shin-Yih Wang

发明人： Ten-Ho Chang ,  Shin-Yih Wang

IPC分类号： H02J3/18 ,  H02P27/02 ,  H02P5/16 ,  H02P5/40

CPC分类号： H02P27/026 ,  H02J3/1892

摘要： An electrical energy saving device for motors comprises in combination a principal circuit system and an associated control circuit system. The principal circuit system includes an input power source, a transducer unit, a load, and a triggering device. The control circuit system includes a signal amplifying unit, a feedback unit, a working-point adjusting and indicating unit, a rectifying and filtering unit, a photoelectric coupling unit, an overload protecting unit, and a delay protecting unit. The control circuit system can automatically detect the load state of the motor and develop a signal through the system to adjust the working-point voltage for enabling the triggering device of the principal circuit system to automatically adjust the firing angle so that the proper magnitude of the input voltage and current are effectively provided to the motor in accordance with its different load states. This operation results in electrical energy being economically consumed and the power factor of the system being effectively controlled.

摘要翻译： 用于电动机的电能节能装置包括主电路系统和相关联的控制电路系统。 主电路系统包括输入电源，换能器单元，负载和触发装置。 控制电路系统包括信号放大单元，反馈单元，工作点调整和指示单元，整流滤波单元，光电耦合单元，过载保护单元和延迟保护单元。 控制电路系统可以自动检测电机的负载状态，并通过系统产生信号，调整工作点电压，使主电路系统的触发装置自动调节触发角， 输入电压和电流根据其不同的负载状态有效地提供给电动机。 该操作导致电能被经济地消耗，并且系统的功率因数得到有效控制。