Study on the Single-Stage Forward-Flyback PFC Converter With QR Control
Study on the Single-Stage Forward-Flyback PFC Converter With QR Control
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带QR控制的单级正向反激式PFC变换器的研究
DOI：
10.1109/tpel.2015.2404859
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发表时间：
2016
影响因子：
6.7
通讯作者：
Lu Qiang
中科院分区：
文献类型：
--
作者：
Xie Xiaogao;Li Jiangsong;Peng Kunsheng;Zhao Chen;Lu Qiang
研究了准谐振控制的单级前反激功率因数校正变换器。该变换器通过一个公共变压器将反激变换器和正激变换器合并。当输入电压低于反射输出电压时，只有反激子变换器工作，而在其余区域，反激子变换器和正激子变换器都工作以共享输出功率。消除了传统正激变换器交流输入电流存在的死区，实现了高功率因数。研究了两种不同的QR控制方案。对这两种QR控制方式进行了详细的分析、优化设计考虑和比较。最后，建立了两个120w的LED驱动器实验样机，验证了理论分析。
The single-stage forward-flyback power factor correction converter with quasi-resonant (QR) control is studied in this paper. This converter merges flyback converter and forward converter through a common transformer. Only the flyback subconverter works when the input voltage is lower than the reflected output voltage while both the flyback subconverter and the forward subconverter operate to share the output power in the rest region. The dead zones which exist in the ac input current of traditional forward converter are eliminated and high power factor can be achieved. Two different QR control schemes have been studied. Detailed analysis, optimal design considerations, and comparison for these two QR control modes are provided. Finally, two 120 W experimental prototypes for LED driver were built up to verify the theoretical analysis.