A Boundary-Mode Forward-Flyback Converter With an Efficient Active LC Snubber Circuit

Author

Lin Chen ; Haibing Hu ; Qian Zhang ; Amirahmadi, Ahmadreza ; Batarseh, Issa

Author_Institution

Florida Power Electron. Center (FPEC), Univ. of Central Florida, Orlando, FL, USA

Volume

29

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

2944

Lastpage

2958

Abstract

This paper describes a boundary-mode forward-flyback converter (BMFFC) with zero-voltage switching that is able to process power efficiently. The theoretical analysis and operating principle of the BMFFC are presented in detail. A nondissipative LC snubber that recycles energy to the input source is employed in order to suppress the voltage spike caused by the leakage inductance of the transformer. The relatively large snubber capacitor also significantly reduces turn-off loss. Following a detailed design procedure, a 200 W prototype with a 25-50 V dc input and 230 V dc output was constructed and tested in order to evaluate the performance of the BMFFC.

Keywords

snubbers; switching convertors; zero voltage switching; BMFFC; boundary-mode forward-flyback converter; efficient-active LC snubber circuit; nondissipative LC snubber; power 200 W; snubber capacitor; theoretical analysis; transformer leakage inductance; turn-off loss reduction; voltage 230 V; voltage 25 V to 50 V; voltage spike suppression; zero-voltage switching; Capacitors; Inductors; MOSFET; Magnetic resonance; Snubbers; Switches; Topology; Boundary mode; LC circuit; forward-flyback;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2013.2272661

Filename

6558480