A loss-less passive snubber for soft-switching boost-type converters

Author

Nomura, Hiroshi ; Fujiwara, Kenichiro

Author_Institution

Kochi Nat. Coll. of Technol., Japan

Volume

2

fYear

1997

fDate

3-6 Aug 1997

Firstpage

793

Abstract

A novel loss-less passive snubber is proposed for the soft-switching boost-type converters. The proposed snubber does not use any auxiliary switches, but uses two snubber capacitors which are charged in parallel and discharged in series automatically. The discharged energy is recovered effectively (more than 95% recovery) into the output capacitor. Thus the snubber provides zero-voltage switching for the converter main switch reducing the turn-off losses and improves the converter efficiency. The experimental results of a 20 kHz DC-DC boost converter and a single-phase AC-DC boost rectifier with the new snubber are presented

Keywords

AC-DC power convertors; DC-DC power convertors; capacitors; losses; rectifying circuits; snubbers; switching circuits; 20 kHz; DC-DC boost converter; capacitors series discharge; converter efficiency improvement; converter main switch; discharged energy recovery; loss-less passive snubber; output capacitor; parallel charged capacitors; single-phase AC-DC boost rectifier; snubber capacitors; soft-switching boost-type converters; turn-off losses reduction; zero-voltage switching; Capacitors; Circuits; Fault location; Inductors; Insulated gate bipolar transistors; Semiconductor diodes; Snubbers; Switches; Switching converters; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference - Nagaoka 1997., Proceedings of the

Conference_Location

Nagaoka

Print_ISBN

0-7803-3823-5

Type

conf

DOI

10.1109/PCCON.1997.638323

Filename

638323