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。
Aiming at the low efficiency of conventional PFC（Power Factor Correction） converter due to its lowfrequency 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.
出处
《电力自动化设备》
EI
CSCD
北大核心
2014年第4期72-77,共6页
Electric Power Automation Equipment
基金
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)~~
关键词
无桥
SEPIC
功率因数校正
变换器
整流桥
bridgeless
SEPIC
power factor correction
electric converters
rectifier bridge
