Multilevel modular switched-capacitor resonant converter with voltage regulation

2017 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2017-03-26 DOI:10.1109/APEC.2017.7930677

Yanchao Li, B. Curuvija, X. Lyu, Dong Cao

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引用次数: 46

Abstract

This paper presents a novel modular multilevel switched-capacitor based resonant converter (MMSCRC) to achieve dc-dc power conversion function. In comparison to existing multilevel modular switched-capacitor circuits, the proposed switched-capacitor resonant converter (SCRC) possess voltage regulation capability. Its modular structure accomplishes voltage conversion function and proposed closed-loop phase-shift control regulates the output voltage. Meanwhile, zero-voltage switching (ZVS) operation can be accomplished. By increasing switching frequency of wide bandgap device and reducing inductance in the circuit, magnetic components can be minimized. Hence, high power density and high efficiency of the proposed converter can be achieved. This paper includes circuit operation, steady-state characteristics as well as in-depth analysis for ZVS operation. Simulation results are provided to verify the operation principle of the proposed MMSCRC. A 600W lab prototype with 6:1 conversion ratio has been built. Experimental result are also provided to validate the theoretical analysis.

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具有电压调节的多电平模块化开关电容谐振变换器

提出了一种新型的模块化多电平开关电容谐振变换器(MMSCRC)，实现了直流-直流功率转换功能。与现有的多电平模块化开关电容电路相比，所提出的开关电容谐振变换器(SCRC)具有稳压能力。其模块化结构实现了电压转换功能，并提出了闭环移相控制来调节输出电压。同时实现零电压开关(ZVS)操作。通过提高宽禁带器件的开关频率和减小电路中的电感，可以使磁性元件最小化。因此，可以实现高功率密度和高效率的变换器。本文包括电路运行、稳态特性以及对ZVS运行的深入分析。仿真结果验证了所提出的MMSCRC的工作原理。一个600W的实验室原型，6:1的转换比已经建成。实验结果验证了理论分析的正确性。

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2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

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