| 引用本文: | 马红波,郑 聪,余文松,郭育华.单开关管无桥SEPIC PFC变换器[J].电力自动化设备,2014,34(4): |
| MA Hongbo,ZHENG Cong,ＹＵ Ｗensong,GUO Yuhua.Single-switch bridgeless SEPIC PFC converter[J].Electric Power Automation Equipment,2014,34(4): |
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| 摘要: |
| 针对传统功率因数校正（PFC）变换器因低频整流桥而效率不高的问题以及Boost PFC变换器拓扑的本质缺陷，提出了一种可升降压的新型无桥SEPIC PFC变换器拓扑。该变换器不但保留了SEPIC拓扑可磁集成、易于隔离等优点，而且相较于现有的无桥SEPIC PFC电路，仅需要一个开关管，因此具有更高的效率和更低的成本。以连续导电模式（CCM）为例详细分析了变换器的工作原理及其参数设计。PSIM的仿真结果和基于UC3854 控制芯片的100 W样机实验结果，均验证了所提拓扑的正确性和有效性。 |
| 关键词: 无桥 SEPIC 功率因数校正 变换器 整流桥 |
| DOI： |
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| 基金项目:国家自然科学基金面上项目（51177138）；铁道部科技研究开发计划重点项目（2012J012-D） |
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| Single-switch bridgeless SEPIC PFC converter |
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MA Hongbo1, ZHENG Cong2, ＹＵ Ｗensong2, GUO Yuhua1
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1.School of Electrical Engineering，Southwest Jiaotong University，Chengdu 610031，China;2.Future Energy Electronic Center（FEEC），Virginia Polytechnic Institute and State University，
Blacksburg 24060，USA
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| Abstract: |
| Aiming at the low efficiency of conventional PFC（Power Factor Correction） converter due to its low-frequency rectifier bridge and the innate topological defect of Boost PFC converter，a novel single-switch bridgeless topology of SEPIC（Single-Ended Primary Inductance Converter） PFC converter is proposed，which，compared with the present bridgeless SEPIC PFC converter，preserves all favorable features of conventional SEPIC topology，such as magnetic aggregation and easy isolation，and needs only one switch，resulting in higher efficiency and lower cost. With the continuous conduction mode as an example，its operational principle and parameter design are analyzed in detail. The results of simulation with PSIM and the results of experiment with a 100 W prototype based on UC3854 validate the correctness and effectiveness of the proposed topology. |
| Key words: bridgeless SEPIC power factor correction electric converters rectifier bridge |
