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An analysis of bidirectional superposed dual active bridge DC-DC converter with synchronous rectifier


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Title: An analysis of bidirectional superposed dual active bridge DC-DC converter with synchronous rectifier
Authors: Hirose, Toshiro / Kimura, Takayuki / Harada, Kosuke / Matsuo, Hirofumi
Issue Date: Nov-2010
Publisher: IEEE
Citation: TENCON 2010, pp.1241-1246; 2010
Abstract: This paper describes the principles and characteristics of a novel bidirectional superposed dual active bridge DC-DC converter with synchronous rectifier, which has a mechanism formed from two bridge-type converters that are linked through superposition in additive polarity in series. Conventionally, for an isolated dual active bridge DC-DC converter, the rated voltage of its switching elements is decided according to the DC power source voltage and load current. Therefore, as the voltage and current specifications of a DC-DC converter become higher, physical size becomes larger, conduction and switching losses increase and power efficiency reduces. To solve this problem, the authors devised the proposed DC-DC converter capable of lowering the rated voltage of switching elements, by means of sharing DC power source voltage and load current between two converters. Further, the capacity of the high frequency transformer becomes small, making the DC-DC converter more efficient and smaller. We designed and constructed a lkW DC-DC converter prototype, and conducted performance evaluation testing. As a result, a conversion efficiency of 98.2% at a rated output of lkW was obtained. A detailed analysis of power flow was also carried out, to identify the characteristics of the converter developed.
Description: 2010 IEEE Region 10 Conference (TENCON 2010) : Fukuoka, 2010.11.21-2010.11.24
Keywords: Bidirectional DC-DC converter / Superposed dual active bridge / Synchronous rectifier / ZCS-ZVS
URI: http://hdl.handle.net/10069/25087
ISBN: 978-1-4244-6889-8
DOI: 10.1109/TENCON.2010.5686356
Rights: ©2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Type: Conference Paper
Text Version: author
Appears in Collections:Conference Paper

Citable URI : http://hdl.handle.net/10069/25087

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