一种可变拓扑隔离型DC/DC变换器  

A Isolated DC/DC Converter with Variable Topology

作　　者：廖建军[1] 黄超[1] LIAO Jianjun;HUANG Chao(Sichuan Institute of Solid-State Circuits,China Electronics Technology Group Corp.,Chongqing 400060,China)

机构地区：[1]中国电子科技集团公司第二十四研究所,重庆400060

出　　处：《电工技术》2021年第8期31-33,159,共4页Electric Engineering

摘　　要：针对机载电子设备中输入供电电压范围较宽、输入/输出隔离的特点,提出了一种可变拓扑结构。为适应不同输入电压电路可自动切换拓扑,详细分析了降压和升压两种模式的工作原理,解决了宽范围输入隔离型稳压电源转换效率和系统稳定的问题。在此基础上,设计了一款16~50 V输入,12 V/300 W输出的DC/DC变换器,并对主要功率器件的电应力进行了计算分析。试验样机表明,该线路结构具有良好的宽输入电压范围适应性和较高的转换效率。According to the characteristics of wide input voltage range and isolation between input and output in airborne electronic equipment,a variable topology is proposed.In order to adapt to different input voltage,the circuit topology can be automatically switched.The working principle of the buck and boost modes are analyzed in detail,and the conversion efficiency and system stability of the wide-range input isolation power supply are solved.On this basis,a 16 V to 50 V input voltage and 12 V/300 W DC/DC converter is designed,and the electrical stress of the main power device is calculated and analyzed.The prototype shows that the structure has a good wide input voltage range adaptability and high conversion efficiency.

关 键 词：宽范围 可变拓扑 电流馈电 高效率 

分 类 号：TM402[电气工程—电器]