Low-loss snubber for a power factor corrected boost converter

Details Low-loss snubber for a power factor corrected boost converter Low-loss snubber for a power factor corrected boost converter

1994-05-31

1996-08-27

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323282, G05F 156

Patent

active

055504582

ABSTRACT:
A boost converter includes a snubber with finite but limited losses to minimize active power switching losses and minimize turn-off losses of the boost diode without generating any additional circulating energy losses. An inductor is connected so as to slow turn off of the boost diode and minimize reverse recovery losses. This inductor additionally minimizes the turn-on switching losses of the active power switch of the converter by providing for zero-current turn-on. A series connection of a finite resistor and a second diode is connected in shunt with the inductor/boost diode connection to prevent excessive voltage ringing across the active power switch by clamping its voltage during turn-off. A third diode is connected to the junction of the inductor and boost diode to prevent the voltage across the boost diode from ringing during the on interval of the active power switch.

REFERENCES:
patent: 4346431 (1982-08-01), Steigerwald
patent: 4533986 (1985-08-01), Jones
patent: 5095261 (1992-03-01), Schoafs
patent: 5373195 (1994-12-01), De Doncker et al.
patent: 5432431 (1995-07-01), Vinciarelli et al.

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