高增益对称双向LCLC谐振变换器的研究  

Research on High-gain Symmetric Bidirectional LCLC Resonant Converter

作　　者：杨玉岗 丁冰 赵荣理[1] 李岚[1] Yang Yugang;Ding Bing;Zhao Rongli;Li Lan(Taiyuan University of Technology,Taiyuan 030024)

机构地区：[1]太原理工大学电气与动力工程学院,太原030024

出　　处：《磁性元件与电源》2022年第4期166-176,共11页Components and Power

摘　　要：为了解决双向DC/DC变换器输入、输出电压范围过窄的问题,提出了一种高增益对称双向LCLC谐振变换器。提出的谐振变换器不是利用变压器的励磁电感参与谐振,而是在变压器的一次侧并联一个LC支路代替变压器励磁电感的作用,使得变换器在电感比比较大的情况下仍有较高的增益,这样就兼顾了LLC型谐振变换器在谐振点的高效率和宽的增益范围,且能保证一次侧和二次侧的软开关特性,能实现谐振变换器的对称双向运行。本文基于基波分析法建立了基波等效模型,推导出了变换器的增益公式,分析了谐振参数对直流增益特性的影响。最后搭建了一台100-200V/24-48V.500W的实验样机,实验结果验证了理论分析的正确性和所提出拓扑结构的可行性及有效性,样机的最大效率能达到96.3%。In order to solve the problem tha t the in put and outp ut voltage ranges of bidirectional DC/DC converter are too small,a high gain symmetric bidirectional LCLC resonant converter is proposed.The proposed resonant converter does not use the magnetizing inductor of transformer to participate in resonance.A parallel LC branch is added on the primary side of the transformer to participate in resonanee,so that the converter still has a large gain with a large inductor ratio.The balanee between high efficiency and large gain range at the resonance point is achieved.The proposed resonant converter can also ensure the soft switching both on the primary and secondary side,and can realize the symmetric bidirectional operation.In this paper,the fundamental wave equivalent model is established by the first harmonic approximation method,the gain formula is obtained,and the effect of resonant parameters on DC gain characteristics is analyzed.Finally,a bidirectional experimental prototype of 100-200V/24-48V 500W was built and the experimental results verify the correctness of theoretical analysis and the feasibility and effectiveness of the proposed topology.The peak efficiency of the prototype can achieve to 96.3%.

关 键 词：双向LCLC谐振变换器 并联LC支路 高增益 软开关 

分 类 号：TM4[电气工程—电器]