Electrical transmission or interconnection systems – Plural supply circuits or sources – One source floats across or compensates for other source
Patent
1996-03-11
1998-09-22
Gaffin, Jeffrey A.
Electrical transmission or interconnection systems
Plural supply circuits or sources
One source floats across or compensates for other source
307125, 307139, H02J 110, H01H 4700
Patent
active
058118896
ABSTRACT:
A circuit used in combination with a redundant power supply system to electrically disconnect its failed power supplies. The circuit comprises a power FET, a rectifier and filter circuit, a start-up circuit and a shut-down circuit. The rectifier and filter circuit rectifies an input AC waveform and subsequently filters a resultant DC voltage which is subsequently used to supply an output voltage at an output terminal connected to the power FET. In parallel with the rectifier and filter circuit, the start-up circuit is coupled to a gate of the power FET to ramp the voltage supplied to that gate slowly turning on the power FET. Coupled in parallel with the start-up circuit, the shut-down circuit conducts voltage from the gate thereby turning-off the power FET to preclude current from other power supplies of the redundant power supply system to pass current to its failed power supply.
REFERENCES:
patent: 4617473 (1986-10-01), Bingham
patent: 4621311 (1986-11-01), O'Brien
patent: 4638175 (1987-01-01), Bradford et al.
patent: 5162663 (1992-11-01), Combs et al.
patent: 5504411 (1996-04-01), McCaleb et al.
Gaffin Jeffrey A.
Intel Corporation
Kaplan Jonathan S.
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