A Novel Integrated Buck–Flyback Nonisolated PFC Converter With High Power Factor
A Novel Integrated Buck–Flyback Nonisolated PFC Converter With High Power Factor
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DOI：
10.1109/tie.2012.2232256
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发表时间：
2013-12
影响因子：
7.7
通讯作者：
Xiaogao Xie;Chen Zhao;Q. Lu;Shirong Liu
中科院分区：
文献类型：
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作者：
Xiaogao Xie;Chen Zhao;Q. Lu;Shirong Liu
提出了一种新型的集成降压-反激非隔离功率因数校正变换器。这种新型变换器是降压变换器和反激变换器的内在集成，根据输入电压是否高于输出电压而工作在反激模式或降压模式。该方法消除了传统Buck PFC变换器中交流输入电流的死区。因此，所提出的集成降压反激式非隔离PFC变换器可以在通用交流输入范围内实现高PF，其输入电流谐波可以很容易地满足IEC 61000 -3-2 C类限制。与传统的降压变换器相比，所提出的变换器的效率没有明显恶化。详细的理论分析和优化设计考虑。一个100 W的原型建立，以验证所提出的集成降压反激非隔离PFC变换器的理论分析。
A novel integrated buck-flyback nonisolated power factor (PF) correction (PFC) converter is proposed in this paper. This new converter is an inherent integration of a buck converter and a flyback converter, which operates in either flyback mode or buck mode according to whether the input voltage is lower or higher than the output voltage. In this way, the dead zones of ac input current in traditional buck PFC converter are eliminated. Therefore, the proposed integrated buck-flyback nonisolated PFC converter can achieve high PF under universal ac input range, and its input current harmonics can easily meet the IEC61000-3-2 Class C limits. The efficiency of the proposed converter is not deteriorated obviously compared to the conventional buck converter. Detailed theoretical analysis and optimal design considerations are presented. A 100-W prototype was built up to verify the theoretical analysis of the proposed integrated buck-flyback nonisolated PFC converter.