Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1985-11-04
1987-09-15
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 64, 307 65, 363 41, H02J 900
Patent
active
046941940
ABSTRACT:
A pulsed power supply having a filter output and a battery backup includes electronic apparatus to sense when the AC source is failing. When the pulsed supply output has the same pulses as that which would be produced by the battery, the supply switches to battery backup mode. As the AC source returns, the supply switches to AC supply mode when the AC is at a level where the pulses produced by the supply would be the same as are actually being produced by the battery backup.
REFERENCES:
patent: 3660750 (1972-05-01), Businelli
patent: 3959711 (1976-05-01), Greenhalgh
patent: 4354223 (1982-10-01), Turnbull
patent: 4475047 (1984-10-01), Ebert, Jr.
Centofanti Ermand
Hansel Allen
Natarajan Thiagarajan
Blum Richard K.
Concurrent Computer Corporation
Grimes Edwin T.
Masselle Frances L.
Murphy Thomas P.
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