Buck+半桥LLC倍压谐振两级式DC/DC变换器  

Two-Stage DC/DC Converter Combined of Buck and Half-Bridge LLC Voltage-Multiplying Resonance

作　　者：张晋玮 周东方 李建兵[1] 郑阳勇 

机构地区：[1]信息工程大学信息系统工程学院 [2]65165部队

出　　处：《信息工程大学学报》2012年第6期682-687,717,共7页Journal of Information Engineering University

基　　金：国家科技重大专项资助项目(2009ZX01008-003)

摘　　要：针对微波功率模块(MPM)集成电源应用,提出了一种新型的基于定频控制的Buck+半桥LLC倍压谐振两级式DC/DC变换器。阐述了两级式变换器的拓扑结构,分析了后级半桥LLC倍压谐振变换器的特性和工作原理,给出了优化设计方法。最后,制作了一台功率400W输出的样机,进行了仿真和实验验证,样机的满载效率达到了96%。This paper presents a novel frequency-fixed two-stage DC/DC converter combined of Buck and half-bridge LLC voltage-multiplying resonance,which is applied to the MPM Integrated Power Conditioner. The topology configuration of the two-stage converter is introduced. The charac- teristics and operating principle of the end stage half-bridge LLC voltage-multiplying resonant con- verter are analyzed. Then, an optimal design methodology is proposed. Finally, a 400 W prototype is built for simulation and verification, and the full load efficiency reaches 96%.

关 键 词：定频控制 BUCK 半桥LLC 倍压 两级式变换器 

分 类 号：TM46[电气工程—电器]