Transient over-voltage protection circuit

Details Transient over-voltage protection circuit Transient over-voltage protection circuit

1982-10-28

1984-07-10

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

361 56, 361 91, 361111, 361194, 322 28, H02H 706

Patent

active

044596316

ABSTRACT:
A transient over-voltage suppressor circuit for a motor vehicle power supply system that includes a diode-rectified alternating current generator. The suppressor circuit comprises a dual coil relay, a Zener diode and a small resistor having a positive temperature coefficient of resistance. The Zener diode and relay coils are connected across the output terminals of a bridge rectifier connected to the generator and when a transient over-voltage occurs the contacts of the relay are closed. When the relay contacts close they connect the resistor and one of the relay coils across the output terminals of the bridge rectifier. The relay contacts open when the resistance of the resistor increases to a predetermined value.

REFERENCES:
patent: 2767309 (1956-10-01), Schaner
patent: 3314001 (1967-04-01), Brockman
patent: 3332006 (1967-07-01), Worrell et al.
patent: 3454860 (1969-07-01), Burkett et al.
patent: 3488560 (1970-01-01), Konopa
patent: 3789269 (1974-01-01), Holm et al.
patent: 3943408 (1976-03-01), Jakobs et al.
patent: 4334256 (1982-06-01), Mings

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