A self-driven active clamp forward converter using the auxiliary winding of the power transformer

被引：44

作者：

Lim, BS ^{[1
]}

Kim, HJ

Chung, WS

机构：

[1] Dong Ah Elecomm Co, Yongin 449820, South Korea

[2] Hanyang Univ, Sch Elect Engn & Comp Sci, Ansan 425791, South Korea

[3] Chongju Univ, Dept Semicond Engn, Chonju 360764, South Korea

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2004年 / 51卷 / 10期

关键词：

active clamp forward converter; active clamp switch; auxiliary winding; dead time;

D O I：

10.1109/TCSII.2004.836039

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 study proposes a new self-driven active clamp forward converter eliminating the extra drive circuit for the active clamp switch. The converter used the auxiliary winding of the power transformer to drive the active clamp switch and a simple RC circuit to get the dead time between the two switches. The operation principle was presented and experimental results were used to verify theoretical predictions. A 100-W (5 V/20 A) prototype converter that only exhibited 1.5-turn winding number in the auxiliary winding was sufficient to drive the active clamp switch on the input of 50 V. Finally, the measured efficiency of the converter was presented and the maximum efficiency of 91 % was obtained.

引用

页码：549 / 551

页数：3