Isolated SEPIC DC-DC Converter With Ripple-Free Input Current and Lossless Snubber

被引：44

作者：

Lee, Sin-Woo ^{[1
]}

Do, Hyun-Lark ^{[1
]}

机构：

[1] Seoul Natl Univ Sci & Technol, Dept Elect & Informat Engn, Seoul 139743, South Korea

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2018年 / 65卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Electrical isolation; lossless snubber; ripple-free current; single-ended primary-inductor converter (SEPIC); POWER-FACTOR RECTIFIER; BOOST CONVERTER; STEADY-STATE;

D O I：

10.1109/TIE.2017.2733440

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper proposes an isolated single-ended primary-inductor converter (SEPIC) dc-dc converter with ripple-free input current and lossless snubber. The proposed converter is based on a conventional isolated SEPIC converter to enable electrical isolation and high voltage gain using a coupled inductor. The input current ripple is significantly reduced by utilizing an auxiliary circuit that also functions as a lossless snubber circuit with an additional diode. Moreover, the maximum switch voltage stress is clamped to a low voltage by the snubber circuit. Therefore, a low voltage rating mosfet that has low R-DS(on) can be utilized as a main switch device. Hence, the total power efficiency is improved. Experimental results from a 100 W prototype, which are presented to verify the theoretic analysis and performance of the proposed converter.

引用

页码：1254 / 1262

页数：9

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