Method for triggering parallel relays and circuit for carrying o

Details Method for triggering parallel relays and circuit for carrying o Method for triggering parallel relays and circuit for carrying o

1994-09-28

1996-09-03

Fleming, Fritz M.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361 154, H01H 4704

Patent

active

055529542

ABSTRACT:
A method for triggering a plurality of relay exciter coils connected parallel to a common voltage source includes turning each of the coils on and off with relay switching means associated with the coils, and triggering the respective coils to be turned on after reaching a response state thereof with a common clock generator having a given clock ratio, through the relay switching means, for establishing a steady state of a holding current being reduced relative to the response state. The method further includes turning off the coils with a common OFF-switch, keeping the respective relay switching means closed for those coils being intended to continue to be operated in the steady state of the holding current, for establishing a response current rising within a short time within the associated coil, and triggering the coil again with the clock generator having the given clock ratio after a predetermined period of time. A circuit for carrying out the method includes diodes each being connected parallel to a respective one of the coils. Each diode is connected in the blocking direction through a common Zener diode connected in series in the blocking direction to the voltage source. The common OFF-switch is connected parallel to the Zener diode.

REFERENCES:
patent: 5107391 (1992-04-01), Siepmann
patent: 5317475 (1994-05-01), Siepmann

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