非隔离模块化DC/DC转换器系列

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) Pub Date : 2016-05-22 DOI:10.1109/IPEMC.2016.7512370

Hongcheng You, X. Cai

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引用次数: 15

摘要

本文提出了一种非隔离模块化dc/dc变换器(MDCC)，该变换器将传统dc/dc变换器中的互补开关(降压、升压、cuk等)替换为2链子模块(简称互补链)和一个电感。为了实现子模块电容器的电压平衡，提出了链式二级步进工作模式。介绍了一种由降压变换器衍生而来的降压型模块化多电平变换器(buck - mdcc)的工作原理。该变换器适用于高压直流转换，因为通过级联更多的子模块可以大大降低子模块开关的压差。此外，变换器的dν/dt可以通过步进2电平调制来控制。与采用正弦波调制的mdcc现有技术相比，该变换器还具有交流循环电流更小、子模块电容要求更低的优点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A family of un-isolated modular DC/DC converters

A family of un-isolated modular dc/dc converters (MDCC) are presented by replacing the complementary switches in classical dc/dc converters (buck, boost, cuk, etc) with 2 chains of submodules (abbreviated as complementary chain-links) and an inductor. A stepped 2-level operating mode of chain-links is proposed to achieve the voltage balance of the submodule capacitors. A buck type modular multilevel converter (Buck-MDCC) derived from buck converter is presented to illustrate the operation principle. The proposed converters are suitable for high voltage dc conversion due to the voltage press of submodule switches can be dramatically reduced by cascading more submodules. Moreover, the dν/dt of the converters can be controlled with stepped 2-level modulation. The proposed converter also offers the merits of lower ac circulating current and lower submodule capacitance requirement compared with prior arts of MDCCs, where the sine-wave modulation is adopted.

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来源期刊

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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