LLC resonant converter utilizing a step-gap transformer structure for holdup time improvement

被引：2

作者：

Lin, Jing-Yuan ^{[1
]}

Lee, Sih-Yi ^{[1
]}

Yueh, Hsuan-Yu ^{[1
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Elect & Comp Engn, 43,Sect 4,Keelung Rd, Taipei, Taiwan

来源：

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS | 2018年 / 46卷 / 12期

关键词：

holdup time; LLC resonant converter; step-gap transformer;

D O I：

10.1002/cta.2562

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter presents a current-controlled variable magnetizing inductance of transformer for further improving the holdup time on half-bridge LLC converter. When the input voltage is failed, the magnetizing inductance of transformer can be decreased sharply; therefore, the LLC converter holdup time can be improved without adding additional auxiliary circuit. The mathematic model between magnetizing inductance and step-gap structure of transformer is proposed, and the benefit effects using this step-gap structure of transformer have been verified in this letter. Finally, a 180-W, LLC converter utilizing step-gap structure of transformer has been achieved, and detailed analysis and design of the proposed step-gap structure are described.

引用

页码：2545 / 2553

页数：9

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