An active-clamp push-pull converter for battery sourcing applications

Author

Hung, J.-C. ; Wu, T.-F. ; Tsai, J.-Z. ; Tsai, C.-T. ; Chen, Y.-M.

Author_Institution

Dept. of Electr. Eng., Nat. Chung Chen Univ., Ming-Hsiung

Volume

2

fYear

2005

fDate

6-10 March 2005

Firstpage

1186

Abstract

This paper presents an active-clamp push-pull converter for battery sourcing applications. A pair of auxiliary switches, resonant inductors and clamping capacitors are added to the primary-side of the transformer to clamp voltage spike and recycle the energy trapped in the leakage inductors. In the proposed active-clamp push-pull converter, since both main and auxiliary switches can be turned on with zero-voltage switching, switching loss can be reduced and conversion efficiency therefore can be improved significantly. Furthermore, the proposed converter can eliminate potential flux-imbalance problems existing in the conventional push-pull converter. In this study, a 1 kW active-clamp push-pull converter was implemented, from which experimental results have shown that efficiency improvement and surge suppression can be achieved effectively. It is relatively feasible for applications to battery sourcing converters

Keywords

cells (electric); losses; power capacitors; power transformers; surge protection; switching convertors; zero voltage switching; 1 kW; active-clamp push-pull converter; auxiliary switches; battery sourcing converters; clamping capacitors; energy trapping; flux-imbalance; leakage inductors; resonant inductors; surge suppression; switching loss; transformer; voltage spike; zero-voltage switching; Batteries; Capacitors; Clamps; Inductors; Recycling; Resonance; Switches; Switching converters; Switching loss; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE

Conference_Location

Austin, TX

Print_ISBN

0-7803-8975-1

Type

conf

DOI

10.1109/APEC.2005.1453151

Filename

1453151