基于可变电感的CLLC谐振变换器  

CLLC Resonant Converter Based on Variable Inductances

作　　者：陈兆岭[1] 陈成友 方伟光 葛绍志 CHEN Zhao-ing;CHEN Cheng-you;FANG Wei-guang;GE Shao-zhi(Jiangsu University,Zhenjiang 212013,China;不详)

机构地区：[1]江苏大学,电气信息工程学院,江苏镇江212013 [2]江苏雷特电机股份有限公司,江苏苏州215300

出　　处：《电力电子技术》2024年第5期108-111,137,共5页Power Electronics

基　　金：江苏省重点研发计划(BE2019009-2);江苏大学高级人才基金(1291140044)。

摘　　要：针对CLLC谐振变换器调频范围过宽带来的磁性元件设计困难问题,提出一种基于可变电感的CLLC谐振变换器及其控制策略。分析变换器的电压增益特性以及可变电感的工作原理,设计CLLC同步整流控制电路,采用调频加调感的控制方式完成闭环调节。搭建了CLLC原理样机并验证了所提方案,试验表明所提变换器在各极限工况下均可实现零电压开通(ZVS)并完成电压增益调节,在轻载时具有良好的降压特性,可在大幅缩减调频范围的同时,实现变换器的高效率运行。Aiming at the magnetic components design problem of CLLC resonant converter caused by its wider frequency modulation,a CLLC resonant converter based on variable inductances and its control strategy are proposed.The voltage gain characteristics of the converter and the operating principle of the variable inductance are analyzed,a CLLC synchronous rectification control circuit is designed,and a control method combined frequency modulation with inductance modulation is adopted for closed-loop regulation.A CLLC converter prototype is built to valid the proposed scheme.The experimental results show that the proposed converter can achieve zero voltage switch(ZVS)and voltage gain adjustment under various extreme operating conditions,and has good voltage reduction characteristics under light load.It can achieve efficient operation while its frequency modulation range is reduced significantly.

关 键 词：谐振变换器 可变电感 同步整流 

分 类 号：TM46[电气工程—电器]