Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1996-11-15
1998-07-07
Berhane, Adolf
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 21, H02H 7122, H02M 3335
Patent
active
057778620
ABSTRACT:
A voltage source, a transformer and a switching controller are coupled for switched mode generation of a regulated output supply voltage. A switching circuit responsive to an on/off signal turns the power supply on and off by establishing a conductive condition in a conductive path. A fault detector establishes a non conductive condition in a part of the conduction path responsive to an overload condition. A delay circuit establishes a conductive condition in an auxiliary conduction path for a period of time after the power supply is turned on. The auxiliary conduction path becomes non-conductive when the fault detector establishes a conductive condition in the part of the conduction path. The part of the conduction path remains conductive absent an overload condition. A latch arrangement including the delay circuit maintains the non conductive condition in the auxiliary conduction path until the power supply is turned off.
REFERENCES:
patent: 4177389 (1979-12-01), Schott
patent: 4546423 (1985-10-01), Seki
patent: 4685020 (1987-08-01), Driscoll et al.
patent: 5055703 (1991-10-01), Schorwalk
patent: 5122726 (1992-06-01), Elliott et al.
George John Barrett
Williams Kevin Michael
Berhane Adolf
Laks Joseph J.
Metelski Marion P.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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