A novel ZCZVT forward converter with synchronous rectification

Author

Sung-Pei Yang ; Jong-Lick Lin ; Shin-Ju Chen

Author_Institution

Dept. of Eng. Sci., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

21

Issue

4

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

912

Lastpage

922

Abstract

A novel zero-current-zero-voltage transition (ZCZVT) forward converter with synchronous rectification (SR) is presented in this paper. The proposed converter is operating at 300kHz and processes the features of both zero-voltage transition (ZVT) at turn on and zero-current transition (ZCT) at turn off for the main switch. The auxiliary switch also achieves zero-current switching (ZCS). The flux of transformer can be reset without tertiary winding. The steady-state analysis and design considerations are investigated in detail in this work. Moreover, a self-driven synchronous rectification is also added to the ZCZVT forward converter to reduce the conduction losses of the output rectifier. For 48-V input and 12-V 100-W output, a prototype of the proposed converter for 300-kHz switching is built to verify the theoretical analysis. Finally, the power losses are well estimated. The overall efficiency of the proposed converter is achieved at 89% at full load.

Keywords

design engineering; losses; rectification; switching convertors; transformers; zero current switching; zero voltage switching; 100 W; 12 V; 300 kHz; 48 V; 89 percent; ZCZVT forward converter; auxiliary switch; output rectifier; power losses; steady-state analysis; synchronous rectification; transformer flux; zero-current switching; zero-current-zero-voltage transition forward converter; Forward contracts; Prototypes; Pulse width modulation; Pulse width modulation converters; Rectifiers; Strontium; Switches; Switching converters; Zero current switching; Zero voltage switching; Forward converter; soft switching; synchronous rectification (SR); zero-current and zero-voltage transition (ZCZVT) forward converter;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2006.876879

Filename

1650291