Isolated Bidirectional Full-Bridge DC–DC Converter With a Flyback Snubber

Author

Wu, Tsai-Fu ; Chen, Yung-Chu ; Yang, Jeng-Gung ; Kuo, Chia-Ling

Author_Institution

Dept. of Electr. Eng., Nat. Chung Cheng Univ., Min-Hsiung, Taiwan

Volume

25

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

1915

Lastpage

1922

Abstract

An isolated bidirectional full-bridge dc-dc converter with high conversion ratio, high output power, and soft start-up capability is proposed in this paper. The use of a capacitor, a diode, and a flyback converter can clamp the voltage spike caused by the current difference between the current-fed inductor and leakage inductance of the isolation transformer, and can reduce the current flowing through the active switches at the current-fed side. Operational principle of the proposed converter is first described, and then, the design equation is derived. A 1.5-kW prototype with low-side voltage of 48 V and high-side voltage of 360 V has been implemented, from which experimental results have verified its feasibility.

Keywords

DC-DC power convertors; snubbers; current-fed inductor; flyback snubber; isolated bidirectional full-bridge DC-DC converter; isolation transformer; leakage inductance; power 1.5 kW; voltage 360 V; voltage 48 V; Flyback converter; isolated full-bridge bidirectional converter; soft start-up;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2010.2043542

Filename

5419988