多模式切换运行的拓扑变换型多谐振软开关直流变换器及参数设计方法

doi:10.19595/j.cnki.1000-6753.tces.181428

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摘要提出一种可支持多模式切换运行的拓扑变换型多谐振软开关直流变换器。该变换器通过引入辅助开关管来改变多谐振腔单元的结构,进而在不同应用场合下表现出自适应的谐振特性。其中,含双变压器的多谐振结构用来满足高电压增益的需求,而五元件多谐振结构则工作在额定点处以保证高效率转换。此外,通过对变换器谐振频率点和峰值增益点位置的合理设计,变换器获得了在狭窄开关频率范围内实现宽电压增益范围和高转换效率的优点。最后,为了验证所提变换器的性能和参数设计方法的有效性,搭建一台额定功率为500W的样机进行了实验验证。当输入电压从80~600V变化时,变换器的输出电压保持400V恒定不变,其最高变换效率达到97.93%。

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	韩富强
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	杨良
	孟准

关键词 ：多运行模式, 拓扑变换型, 多谐振, 软开关, 高电压增益, 高转换效率

Abstract：A topology-morphing multi-resonant soft-switching DC-DC converter is proposed in this paper. Auxiliary switches are adopted to control the equivalent resonant tank, and the adaptive resonant characteristics can be exhibited in different situations. The dual-transformer multi-resonant circuit is employed to meet the requirement of high voltage gain, and a five-element resonant tank is utilized at the rated state for high conversion efficiency. In addition, the placement of various resonant frequency points and peak voltage gains are reasonably designed in this paper. Therefore, wide voltage gain range and high efficiency are both guaranteed within a relatively narrow frequency range. To verify the performances of the proposed converter and the feasibility of the parameter design method, a 500W prototype is built in the laboratory. The input voltage varies from 80V to 600V, and the output voltage keeps constant at 400V. The highest efficiency is 97.93% for experimental tests.

Key words： Multi-mode operation topology-morphing multi-resonant soft-switching high voltage gain high conversion efficiency

收稿日期: 2018-08-30 出版日期: 2019-11-28

PACS:

TM46

基金资助: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）” 项目资助

通讯作者: 王议锋男,1981年生,博士,副教授,研究方向为先进电力电子技术在电网中的应用。E-mail: wayif@tju.edu.cn

作者简介: 韩富强男,1992年生,博士研究生,研究方向为谐振型软开关直流变换器。E-mail: fqhanyz@foxmail.com

引用本文:

韩富强, 王议锋, 陈梦颖, 杨良, 孟准. 多模式切换运行的拓扑变换型多谐振软开关直流变换器及参数设计方法[J]. 电工技术学报, 2019, 34(22): 4728-4738. Han Fuqiang, Wang Yifeng, Chen Mengying, Yang Liang, Meng Zhun. A Topology-Morphing Multi-Resonant Soft-Switching DC-DC Converter with Parameter Design Method for Multi-Mode Operation. Transactions of China Electrotechnical Society, 2019, 34(22): 4728-4738.

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