Coil and coil driver control apparatus

Details Coil and coil driver control apparatus Coil and coil driver control apparatus

1983-01-05

1985-04-16

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361 93, H01H 4700

Patent

active

045119473

ABSTRACT:
Apparatus (10) for monitors and protects a plurality of contactor coils (14A-E) and coil drivers (16A-E) from damage owing to short circuits, and prevents the concurrent energization of more than a preselected number of the coils (14A-E). Included is a monitor (84) for sensing the total current flowing through the plurality of coils (14A-E) and supplying a variable current signal in response to a magnitude of the sensed total current, and a control (85) for receiving the variable current signal and controlling the energization of the coils (14A-E) in response to the magnitude of the current signal. By monitoring and controlling the energization of the plurality of coils (14A-E) damage due to excessive current flow through the coils (14A-E) is avoided and the number of concurrently energized coils (14A-E) is limited to the preselected number.

REFERENCES:
patent: 3466505 (1969-09-01), Anderson
patent: 3551773 (1970-12-01), Dannettell et al.
patent: 4059844 (1977-11-01), Stewart
patent: 4255775 (1981-03-01), Andrews

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