D.C. relay with power reducing function

Details D.C. relay with power reducing function D.C. relay with power reducing function

1987-09-23

1991-08-13

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

219 1055B, 361187, H01H 4700

Patent

active

050400894

ABSTRACT:
A relay including an internal power reducing mechanism for automatically reducing the relay's power consumption without the need for any periphral power reducing circuits. The relay includes a pair of relay contacts for alternately opening and closing an elctromagnetic coil for generating a magnetic force, a switch member and at least one coil terminal for controlling the resistance of, and thus the current level in, the electromagnetic coil, after the relay is energized. To reduce the power consumption of the relay, in response to the magnetic force of the electromagnetic coil, the movable contact plate simultaneously moves one of the relay contacts with respect to the other and the switch member with respect to the coil terminal. By this movement of the movable contact plate, the pair of relay contacts are closed and an additional electromagnetic coil or a resistor is connected in series with the electromagnetic coil, thus increasing the effective electrical resistance of the electromagnetic coil. As the result, a holding current level is less than a driving current level needed to initialize an energized state.

REFERENCES:
patent: 4039903 (1987-08-01), Russell
patent: 4160283 (1979-07-01), Adams
patent: 4295111 (1981-10-01), Wang
patent: 4609965 (1986-09-01), Baker
patent: 4754362 (1988-06-01), Beller
patent: 4803589 (1989-02-01), Kimpel

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