Improvement of Efficiency in Bidirectional DC-DC Converter with Dual Active Bridge Using GaN-HEMT

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-05-01 DOI:10.1541/ieejjia.22006373

Ryuji Yamada, Akihiro Hino, Keiji Wada

引用次数: 1

Abstract

A prototype bidirectional isolated DC-DC converter with an output of 3.6 kW, using GaN-HEMTs, employing a planar transformer and operating at a maximum frequency of 400 kHz, was developed and evaluated. Typical circuits for bidirectional isolated DC-DC converters are the LLC resonant converter and the dual active bridge (DAB), both of which have the disadvantage of low efficiency at light loads. In this paper, GaN-HEMTs were used as a rectifier device to reduce DAB losses with natural commutation under light loads, utilizing their no reverse recovery loss characteristics. Zero-voltage switching was achieved using the transformer excitation current as a lagging phase current on the input side. As a result of the efficiency comparison between the LLC resonant converter and DAB under the same components and input/output conditions, higher efficiency was obtained in DAB under most conditions. The maximum efficiency was 98.6%.

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利用GaN-HEMT提高双有源桥双向DC-DC变换器效率

开发并评估了一种输出3.6 kW的双向隔离DC-DC变换器原型，该变换器采用gan - hemt，采用平面变压器，最大工作频率为400 kHz。双向隔离型DC-DC变换器的典型电路是LLC谐振变换器和双有源电桥(DAB)，两者都存在轻负载时效率低的缺点。在本文中，gan - hemt被用作整流器件，利用其无反向恢复损耗的特性，在轻负载下通过自然换流来降低DAB损耗。零电压开关是利用变压器励磁电流作为输入端的滞后相电流实现的。在相同元件和输入输出条件下，对LLC谐振变换器和DAB的效率进行了比较，结果表明，在大多数条件下，DAB的效率更高。最高效率为98.6%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.