Circuit for driving one or more electromagnetic relays which use

Details Circuit for driving one or more electromagnetic relays which use Circuit for driving one or more electromagnetic relays which use

1990-04-03

1992-04-21

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361161, 361166, 361194, 323265, 323907, H01H 4714

Patent

active

051073919

ABSTRACT:
A circuit arrangement for driving at least one electromagnetic relay provides that all of the excitation circuits can be connected to a constant voltage source in parallel relative to each other and jointly in series with the switching path of an electronic switch (FET). The electronic switch (FET) is switched through and blocked in impulsive manner whereby the pulse-duty factor is adjusted in a control unit depending on the operating voltage (U.sub.B) and the ambient temperature of the relay so that it does not fall below the minimum holding current required for the connected relays.

REFERENCES:
patent: 3748537 (1973-07-01), Vigini
patent: 3884318 (1975-05-01), Abel et al.
patent: 4410808 (1983-10-01), Woodhouse
Article entitled "Schaltungspraxis 2087 Elektronic 33" (1984) Okt., No. 20, pp. 117-118.

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