Sub-milliamp mechanical relay control

Details Sub-milliamp mechanical relay control Sub-milliamp mechanical relay control

1989-08-21

1992-02-18

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361205, 361210, 455 58, H01H 4732

Patent

active

RE0338257

ABSTRACT:
A relay driver circuit, suitable for controlling a bistable relay, includes [a storage device which is charged to a first voltage level by a low current flow voltage source.] a transformer which handles both an information signal and a control signal and a storage device. The control signal is provided by a low current low voltage source. A first switching circuit couples the storage device to the bistable relay when the first voltage level exceeds a predetermined value. The charge on the storage device is dumped into the relay and forces it into a first state (set). A second switching circuit is coupled to sense the voltage on the storage device and the voltage on the low voltage source. When the voltage on the low voltage source falls below the voltage on the storage device, current flows from the storage device and forces the relay into a second state (reset). The reset time is within 100 .mu.s.

REFERENCES:
patent: 3638075 (1972-01-01), Brown
patent: 3889161 (1975-06-01), Trush
patent: 3975666 (1976-08-01), Redding
patent: 4257081 (1981-03-01), Sauer et al.
patent: 4418374 (1983-11-01), Callan

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