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- Title
Single-stage QR AC-DC converter based on buck-boost and flyback circuits.
- Authors
Yijie Wang; Shu Zhang; Yueshi Guan; Xiaosheng Liu; Dianguo Xu
- Abstract
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.
- Subjects
AC DC transformers; ELECTRIC circuits; ELECTRIC power factor; ENERGY transfer; ELECTRIC power system reliability
- Publication
IET Power Electronics (Wiley-Blackwell), 2017, Vol 10, Issue 1, p103
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/iet-pel.2016.0264