A novel lossless passive snubber for soft-switching boost-type converters

Author

Fujiwara, Kenichiro ; Nomura, Hiroshi

Author_Institution

Dept. of Electr. Eng., Kochi Nat. Coll. of Technol., Japan

Volume

14

Issue

6

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

1065

Lastpage

1069

Abstract

A novel lossless passive snubber is proposed for soft switching boost-type converters. The proposed snubber does not use any auxiliary switches, but uses two identical snubber capacitors which are charged in parallel at turn off of the main switch and discharged in series at turn on automatically, and 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 both the turn-off losses and the electromagnetic interference (EMI) noise, which improves the converter performance. The experimental results of a 20 kHz 600 W 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; electromagnetic interference; losses; snubbers; switching circuits; 20 kHz; 600 W; DC-DC boost converter; EMI; capacitors charging; capacitors discharging; converter main switch; converter performance improvement; discharged energy recovery; electromagnetic interference; lossless passive snubber; single-phase AC-DC boost rectifier; snubber capacitors; soft-switching boost-type converters; turn-off losses reduction; zero-voltage switching; Analog-digital conversion; Capacitors; Electromagnetic interference; Magnetic losses; Noise reduction; Performance loss; Snubbers; Switches; Switching converters; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.803400

Filename

803400