High Efficiency Mechanism Analysis of Resonant Switched-Capacitor Converter
High Efficiency Mechanism Analysis of Resonant Switched-Capacitor Converter
复制标题
谐振开关电容变换器的高效机理分析
DOI：
10.1109/access.2020.3042163
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发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Xinyong Xu
中科院分区：
文献类型：
--
作者：
Liangzong He;Xinyong Xu
开关电容（SC）变换器在实际应用中越来越受欢迎。谐振型开关电容变换器（RSCC）采用小电感作为电流整形器，具有充电电流平滑、电压和电流变化率小等优点。本文对谐振型开关电容变换器（RSCC）的效率机理进行了全面深入的分析。将任意RSCC分解为SRLC电路、CRLC电路和SRLC 2电路三个基本子电路，并分别与SCC的相应子电路进行了分析比较。然后可以导出RSCC的总体效率。此外，从另一个角度提出了一种新的输出阻抗计算方法，以揭示RSCC的高效机理。在此基础上，得出了RSCC的高效运行条件。最后，一个谐振桥模块化开关电容变换器（RBMSCC）的建议和建立的RSCC的扩展实施例，以实现高效率的操作。对谐振开关电容变换器的设计提出了一些有益的意见。
The switched-capacitor (SC) converters are gaining popularity in some practical use. Its resonant counterpart, with a small inductor as current shaper in the architecture, has the advantage of smoother charging current, smaller voltage and current variation ratio and so on. This paper presents a generic and thorough analysis of the efficiency mechanism of the resonant switched-capacitor converter (RSCC). It decomposes any RSCC into three basic sub-circuits of SRLC circuit, CRLC circuit and SRLC2 circuit, which are analyzed and compared with corresponding sub-circuits of SCC, respectively. Then the overall efficiency of a RSCC could be derived. Furthermore, a new calculation method of output impedance is developed in another perspective to reveal the high efficiency mechanism of RSCC. On this basis, the high efficiency operation condition for RSCC could be obtained. Finally, a resonant bridge modular switched-capacitor converter (RBMSCC) is proposed and built for example of extended implementation of RSCC to achieve high efficiency operation. Some useful comments for designing resonant switched-capacitor converters are suggested.
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