Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1999-02-11
2000-02-22
Berhane, Adolf Deneke
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
363 60, G05F 1613
Patent
active
060284188
ABSTRACT:
A boost converter includes a novel active snubber which reduces losses caused by the reverse-recovery characteristic of the boost rectifier. The active snubber includes a snubber inductor, a ground-referenced referenced auxiliary switch, and a snubber rectifier. The losses are reduced by inserting the snubber inductor in series with the boost switch and the boost rectifier, so as to control the rate of change (di/dt) of the boost rectifier current during the rectifier's turn-off. A proper operation of the proposed circuit requires overlapping gate drives of the main and the auxiliary switches. The component voltage and current stresses in the proposed circuit are similar to those in the conventional, "hard-switched" boost converter.
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Jang Yungtaek
Jovanovic Milan M.
Berhane Adolf Deneke
Delta Electronics , Inc.
Kwok Edward C.
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