The AC contactor saving and silent running circuit 1

Published:2012/9/18 1:36:00 Author:Ecco | Keyword: AC contactor, saving , silent running | From:SeekIC

In the circuit shown in figure, when the motor is starting, pressing the start button ST, AC contactor KM will pull in, then the KM auxiliary contacts are closed; releasing the ST, ST normally closed contact will restore the closed state, then the diode VD and KM coils are connected in parallel, and KM self-locking contact connects to the power supply through a capacitor C, KM turns to DC operation. Capacitor C plays buck role in the circuit and makes the AC are flows from top to bottom of coil in the positive and negative half-wave, and it changes AC contactor to DC operation. DC operating noise is minimal, so it is also called AC contactor silent running.



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