Energizing and quick deenergizing circuit for electromagnetic co

Details Energizing and quick deenergizing circuit for electromagnetic co Energizing and quick deenergizing circuit for electromagnetic co

1979-06-20

1981-06-16

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Including means for using, or compensating for, the induced...

361 13, 361 91, H01H 4732

Patent

active

042741220

ABSTRACT:
An improved circuit for energizing and quickly deenergizing the DC operating winding of an electromagnetic relay or contactor from sources of AC supply. It employs a full wave rectifier bridge, a transistor for initiating and maintaining the energization of the relay or contactor control winding when AC is supplied to the bridge, and a zener diode connected in parallel with the main conducting path of the transistor to facilitate quick deenergization of the control winding when the AC supply to the bridge is interrupted.

REFERENCES:
patent: 3340407 (1967-09-01), Sinclair
patent: 3378762 (1968-04-01), Parker
patent: 3470892 (1969-10-01), Barker
patent: 3594614 (1971-07-01), Halbeck
patent: 3737736 (1973-06-01), Stampfli
patent: 4114184 (1978-09-01), Stampfli

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