基于GaN FET的1 MHz多路CLLC双向直流变换器  

1 MHz Bidirectional Multi-CLLC DC-DC Converter with GaN FET

作　　者：侯宇琦 王萍[1] 王议锋[1] 陈博[1] HOU Yuqi;WANG Ping;WANG Yifeng;CHEN Bo(Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电气传动》2021年第18期14-22,共9页Electric Drive

基　　金：国家重点研发计划项目(2018YFB0904700)。

摘　　要：基于双向CLLC拓扑提出了一种采用氮化镓场效应晶体管(GaN FET)和平面磁集成技术的1 MHz半桥型高增益Multi-CLLC谐振变换器。该拓扑具有双向高增益特性和较高的功率密度,适用于分布式储能系统。分析了该变换器的工作原理、拓扑特点和参数设计方法。采用了平面磁集成技术,并提出了绕线及漏感分布改进方法。实验室研制了400 W样机,用于验证理论分析和参数设计的正确性,样机实现了最高92%的工作效率。Based on bidirectional CLLC topology,a novel high conversion ratio 1 MHz half-bridge resonant DC-DC converter was proposed.By using gallium nitride field effect transistor(GaN FET)and integrated planar magnetics,the new converter not only maintained the good characteristic of CLLC for a high gain feature,but also harvested high power density,which is very suitable for distributed power energy storage system.The operating principles were given.Meanwhile,operational features and parameter design method were discussed.Also,the improved winding and leakage inductance distribution methods of integrated planar magnetics were elaborated.Finally,a 400 W prototype was established to verify the correctness of theoretical analysis and parameter design.And,its highest efficiency reaches 92%.

关 键 词：双向直流变换器 高频 CLLC谐振 GAN器件 宽禁带半导体材料 

分 类 号：TM46[电气工程—电器]