A family of high power density unregulated bus converters

被引：106

作者：

Ren, YC ^{[1
]}

Xu, M ^{[1
]}

Sun, JL ^{[1
]}

Lee, FC ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Ctr Power Elect Syst, Blacksburg, VA 24061 USA

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2005年 / 20卷 / 05期

基金：

美国国家科学基金会;

关键词：

body diode loss; bus converter; two-stage approach; zero-voltage zero-current-switching (ZVZCS);

D O I：

10.1109/TPEL.2005.854025

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 paper begins by reviewing current bus converters and exploring their limitations. Next, a family of inductor-less bus converters is proposed to overcome the limitations. In the new bus converters, magnetizing current is used to achieve zero-voltage-switching (ZVS) turn-on for all switches. The resonant concept is used to achieve nearly zero-current-switching (ZCS) turn-off for the primary switches and no body diode loss for the synchronous rectifiers (SRs). Meanwhile, the self-driven method can be easily applied to save drive loss of SRs. Based on these concepts, a full-bridge bus converter is built in the quarter-brick size to verify the analysis. The experimental results indicate that it can achieve 95.5% efficiency at 500-W, 12-V/45-A output. Compared with industry products, this topology can dramatically increase the power density. These concepts are also applied to nonisolated dc/dc converters. As an example, a resonant Buck converter is proposed and experimentally demonstrated.

引用

页码：1045 / 1054

页数：10

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