CLTLC多谐振变换器的磁集成方法  

Magnetic Integration Method for CLTLC Multi-Resonant Converter

作　　者：王议锋[1] 刘瑞欣 韩富强 孟准 Wang Yifeng;Liu Ruixin;Han Fuqiang;Meng Zhun(Key Laboratory of Smart Grid of Ministry of Education Tianjin University,Tianjin 300072 China;State Grid Nanjing Power Supply Company,Nanjing 210019 China;State Grid Tianjin Economic Research Institute,Tianjin 300171 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 [2]国网南京供电公司,南京210019 [3]国网天津市电力公司经济技术研究院,天津300171

出　　处：《电工技术学报》2022年第2期380-388,共9页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划“智能电网技术与装备”重点专项“中低压直流配用电系统关键技术及应用(2018YFB0904700)”资助项目。

摘　　要：基于印制电路板(PCB)绕组及平面变压器技术,提出一种仅包含单一磁件的磁集成设计方案,可有效解决多谐振变换器中磁性元件数量过多的问题,并将其成功应用到CLTLC多谐振变换器中。该变换器的所有磁性元件,包括两个谐振电感和两个高频变压器,都可集成到EIE型磁心结构中。为实现变压器励磁电感和漏感的解耦控制,利用矩阵变压器思想和绕组不均匀分布设计,在磁心的中柱引入一定气隙,可得到一种新型E型磁心结构。另外,基于该结构,建立变压器的磁阻模型,从数学角度对所提磁集成方案进行论证。同时,给出最终的磁集成设计方案。最后,建立一台额定功率为1kW的CLTLC多谐振变换器样机,并进行了相关实验。实验结果验证了所提磁集成设计方案的可行性和有效性,变换器的最大效率可达96.45%。On the basis of the printed circuit board(PCB)winding and planar transformer technology,a magnetic integration design scheme is proposed with only a single magnetic component.It solves the problem of the excessive number of magnetic components in the multi-resonant converter,and is successfully applied to the CLTLC multi-resonant converter.All the magnetic components of the converter,including two resonant inductors and two high-frequency transformers,can be integrated into the EIE core structure.In this regard,with the matrix transformer concept and uneven winding distribution,a novel E-type core can be obtained by introducing an air gap to the center core leg.Thus,the decoupling control of magnetizing inductance and leakage inductance of the transformer can be realized.In addition,according to the proposed structure,the reluctance model of the transformer is established.Then the magnetic integration scheme is further demonstrated from the mathematical aspect.The final magnetic integration design is also discussed.In the end,a 1 kW CLTLC prototype is built and relevant experiments are carried out.The experimental results verify the feasibility and effectiveness of the proposed scheme.The peak efficiency of the converter can reach 96.45%.

关 键 词：PCB绕组 平面变压器 不均匀分布绕组 谐振型直流变换器 高转换效率 

分 类 号：TM46[电气工程—电器]