一种具有平滑模式切换特征的拓扑变换型多谐振直流变换器

doi:10.19595/j.cnki.1000-6753.tces.L80645

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摘要提出一种拓扑变换型多谐振软开关直流变换器及其暂态平滑控制方法。首次通过引入辅助开关管,变换器可在三种工作模式间灵活切换,以实现在狭窄频率范围内快速宽范围调节电压增益的运行效果,获得在宽电压增益范围的高效率变换优势。同时,针对模式切换过程中存在的电压波动大等问题,所提暂态控制方法采用驱动信号渐变控制的方式,实现了各模式间的平滑切换,有效平抑切换过程中的电压波动。最后,对基于一台实验样机进行所提变换器拓扑和控制的有效性的相关验证,结果表明：变换器能够在较宽的输入电压范围（80~600V）内维持输出电压的稳定,实现了平滑切换,并且始终保持较高的变换效率（97.2%~98.2%）。通过采用所述暂态控制方法,两次切换过程中的暂态电压波动分别从38.4V降至10.8V,35.2V降至8.4V,实现了平滑模式过渡。

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	王议锋
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	李占纯

关键词 ：拓扑变换, 多谐振, 直流变换器, 暂态控制, 平滑切换

Abstract：In this paper, a topological transformation multi-resonant soft-switching DC-DC converter and its transient smoothing control method are proposed. By introducing auxiliary switches, the converter can flexibly adjust its structure among three operating modes to achieve a fast and wide range regulation of voltage gain in a narrow frequency range, and obtain the advantage of high efficient conversion in a wide range of voltage gain. At the same time, for the problem of large voltage fluctuations in the mode switching process, the proposed transient control method adopts the way of the driving signal gradient control to achieve smooth switching between the modes and effectively suppress the voltage fluctuation during the process of switching. Finally, the proposed converter topology is verified by an experimental prototype. It is demonstrated that the converter can maintain the stability of the output voltage in a wide input voltage range (80~600V), achieve a smooth switching, and always hold a higher conversion efficiency (97.2%~98.2%). Meanwhile, by adopting the transient control method, the transient voltage fluctuations during the two switching processes are reduced from 38.4V to 10.8V and 35.2V to 8.4V respectively, achieving a smooth mode transition.

Key words： Topological transformation multi-resonant DC-DC converter transient control smooth switching

收稿日期: 2018-07-09 出版日期: 2019-10-30

PACS:

TM46

通讯作者: 陈梦颖女,1993年生,硕士研究生,研究方向为谐振型软开关直流变换器。E-mail: cmying68@163.com

作者简介: 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

引用本文:

王议锋, 陈梦颖, 田栢苓, 杨良, 李占纯. 一种具有平滑模式切换特征的拓扑变换型多谐振直流变换器[J]. 电工技术学报, 2019, 34(20): 4283-4294. Wang Yifeng, Chen Mengying, Tian Bailing, Yang Liang, Li Zhanchun. A Topological-Transformation Multi-Resonant DC Converter with Smooth Mode Switching Characteristic. Transactions of China Electrotechnical Society, 2019, 34(20): 4283-4294.

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