AC Fail-detect and battery switchover circuit for multi-bus powe

Details AC Fail-detect and battery switchover circuit for multi-bus powe AC Fail-detect and battery switchover circuit for multi-bus powe

1981-02-05

1982-08-03

Gellner, Michael L.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307130, H02J 906

Patent

active

043429220

ABSTRACT:
A power supply having reliable means to detect the failure of an AC power source and to provide an AC fail signal in response thereto includes error-free switchover circuitry to supply emergency power from a standby battery. The power supply comprises a comparator circuit, a Schmitt trigger-inverter circuit, and a feedback circuit which provides positive regeneration to ensure error-free battery switching under AC power fail or restore conditions.

REFERENCES:
patent: 4225792 (1980-09-01), Fahey
patent: 4234920 (1980-11-01), Van Ness et al.

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