Single-stage QR AC-DC converter based on buck-boost and flyback circuits

被引：9

作者：

Wang, Yijie ^{[1
]}

Zhang, Shu ^{[1
]}

Guan, Yueshi ^{[1
]}

Liu, Xiaosheng ^{[1
]}

Xu, Dianguo ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Elect Engn & Automat, Harbin 150001, Heilongjiang, Peoples R China

来源：

IET POWER ELECTRONICS | 2017年 / 10卷 / 01期

关键词：

AC-DC power convertors; resonant power convertors; power factor; switching convertors; topology; circuit reliability; single-stage QR AC-DC converter; buck-boost circuit; flyback circuit; single-stage quasiresonant AC-DC converter; discontinuous conduction mode; high-input power factor; backstage flyback converter; energy transfer; QR switch mode; converter efficiency improvement; switch turn-on loss reduction; single-stage topology; cost reduction; system reliability improvement; design process; power; 50; W; STANDBY POWER; SUSTAIN POWER; LED DRIVER; VOLTAGE; SYSTEMS; DESIGN;

D O I：

10.1049/iet-pel.2016.0264

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：

In this study, a single-stage quasi-resonant (QR) AC-DC converter based on buck-boost and flyback circuits is proposed. The forestage buck-boost circuit works in discontinuous conduction mode to achieve a high-input power factor (PF), and the backstage flyback converter, working in QR mode, is responsible for energy transfer. The QR switch mode can improve the efficiency of the converter by decreasing the switch turn-on losses. The single-stage topology can reduce the cost and raise the reliability of the system. The detailed design process is described in this study, and a 50 W prototype was developed that has a maximum PF higher than 0.99 and a maximum efficiency of 90.91% in nominal working conditions.

引用

页码：103 / 111

页数：9

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