ENERGY-SAVING CONTROL METHOD FOR CONTACTOR

Disclosed is an energy-saving control method for a contactor, including the following steps: connecting the contactor: after a control power supply is turned on, enabling an energy storage circuit to work to charge an energy storage capacitor, and meanwhile, enabling a coil of a contactor KM to generate an attractive magnetic force after receiving a pulse voltage signal, making an action mechanism of the contactor KM act; disconnecting the contactor: when the control power supply is turned off, discharging the energy storage capacitor of the energy storage circuit, so as to provide released electric energy to the coil of the contactor KM, where the released electric energy outputs a pulse with opposite polarity to a pull-in voltage of the coil of the contactor KM via a full-bridge drive control circuit, and the coil of the contactor KM generates a reverse magnetic force. According to the method provided by the present disclosure, a magnetic holding contactor completely replaces an energy-saving control module of the traditional ordinary contactor, and an ordinary non-magnetic holding contactor can achieve the opening and closing by single-line inching control, so as to solve the problem that the magnetic holding contactor cannot be controlled to open and close by single-line inching. Meanwhile, the power consumption of the coil of the contactor can be reduced by 98%, and the energy-saving effect is obvious.