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    • 4. 发明授权
    • Energy-saving controller for three-phase induction motors
    • 三相异步电动机节能控制器
    • US08217618B2
    • 2012-07-10
    • US12379394
    • 2009-02-20
    • Ka Wai Eric ChengXiangdang Xue
    • Ka Wai Eric ChengXiangdang Xue
    • H02P3/18
    • H02P23/02H02P27/16
    • The present invention relates to an energy-saving system for three-phase induction motors and is based on the principle of variable voltage control at constant speed. It is composed of a microprocessor, exampling circuit, sensing circuit, acquiring circuit, firing circuit, and AC to AC converter. The system is to automatically adjust the voltage to the induction motor with the variation in the motor load, in order to obtain high operating power factor and efficiency. The system will result in considerable energy-savings when a three-phase induction motor runs under constant light-load or variable-load with low duty ratio.
    • 本发明涉及一种用于三相感应电动机的节能系统,其基于恒定速度可变电压控制的原理。 它由微处理器,采样电路,感测电路,采集电路,点火电路和交流转换器组成。 该系统是随着电动机负载的变化自动调节感应电动机的电压,以获得高的工作功率因数和效率。 当三相感应电机在恒定的轻负载或低负载下的可变负载下运行时,该系统将节省相当的能量。