An Efficient Active LC Snubber for Forward Converters

Author

Jinno, Masahito ; Chen, Po-Yuan ; Lin, Kun-Chih

Author_Institution

Dept. of Electr. Eng., I-Shou Univ., Kaohsiung, Taiwan

Volume

24

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1522

Lastpage

1531

Abstract

An efficient active LC snubber for forward converters is proposed in this paper. The proposed active LC snubber can be used to reset transformer and suppress switching surge. Further, by storing surge energy in the proposed active LC snubber and then releasing it to the flyback auxiliary output, the converter can achieve high efficiency. For a forward converter with active LC snubber, 91.02%, the maximum output efficiency can be obtained. Because of the high performance on surge suppression and energy recovery, experimental results show that the output efficiency of this proposed converter is higher than that of active-clamped-based converters. Furthermore, for a synchronous rectification forward converter with this active LC snubber, the maximum output efficiency can be further raised to 94.72%.

Keywords

power convertors; rectifying circuits; snubbers; surges; transformers; active LC snubber; forward converter; switching surge suppression; synchronous rectification; transformer; Active inductors; Clamps; MOSFET circuits; Prototypes; Snubbers; Strontium; Surges; Switched-mode power supply; Switches; Timing; Active LC snubber; flyback auxiliary output; synchronous rectification;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2009.2014237

Filename

5073269