Analysis and Design of a High Gain DC/DC Converter With Function Decoupling

被引：0
|
作者：
Lü X. [1 ]
Luo Q. [1 ]
Chen S. [1 ]
Zhou L. [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Shapingba District, Chongqing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 03期
基金：
中国国家自然科学基金;
关键词：
DC/DC converter; High efficiency; High gain ratio; LLC resonant converter;
D O I：
10.13334/j.0258-8013.pcsee.180306
中图分类号：
学科分类号：
摘要：
The traditional Boost converter has some disadvantages such as real gain limitation, large device stress and low conversion efficiency. It is difficult to realize high efficiency and high gain DC/DC conversion. Therefore, a decoupled high gain converter consisting of a DCX and an auxiliary converter was proposed, in which the DCX mainly realizes fixed gain conversion function with high efficiency, while the auxiliary converter mainly realizes the output voltage regulation function. In this paper, the different combinations of the combined high gain converters were compared and analyzed first, and the structure of the function-decoupled high-gain converter was confirmed. Then the topology selection and control strategy of DCX and auxiliary converter were discussed. On this basis, the optimal design method of circuit parameters was proposed, especially the parameter design of DCX was described in detail. Finally, an experimental prototype with an output of 400W was built based on the circuit parameters determined. The experimental results verified the correctness of the theoretical analysis. The maximum conversion efficiency of the experiment was 94.1%. © 2020 Chin. Soc. for Elec. Eng.
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页码：920 / 931
页数：11
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