Multiphase Control for Robust and Complete Soft-charging Operation of Dual Inductor Hybrid Converter

2019 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2019-03-17 DOI:10.1109/APEC.2019.8721951

Tianshi Xie, R. Das, Gab-Su Seo, D. Maksimović, Hanh-Phuc Le

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引用次数: 14

Abstract

This paper presents a new Multiphase Dual Inductor Hybrid (MP-DIH) Converter for application in data center and telecommunication systems. The converter is based on addition of two output filter inductors to a Dickson switched-capacitor converter. The inductors are operated in multiple phases that are non-overlapped and evenly distributed over one switching cycle, completely soft-charging all flying capacitors even in the presence of practical capacitor mismatches and voltage ripples. In this converter operation, each branch of the switched-capacitor network is activated individually in one charging phase, and two interleaved inductors are employed to softly charge and discharge the capacitors to achieve high efficiency without any complex capacitor sizing or split phase operation. To verify the topology and its soft-charging advantages, a 48V-to-1.8V 20W experimental converter prototype is constructed. The converter achieves 92.4% peak efficiency for 40V-to-1.8V conversion and 92.1% peak efficiency for 48V-to-1.8V conversion at 4A load, and with 20% capacitance variations.

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双电感混合变换器鲁棒完全软充电的多相控制

本文介绍了一种适用于数据中心和通信系统的新型多相双电感混合转换器(MP-DIH)。该变换器是基于在Dickson开关电容器变换器上增加两个输出滤波器电感。电感器在一个开关周期内以不重叠且均匀分布的多相工作，即使在实际电容器不匹配和电压波动存在的情况下，也可以完全对所有飞行电容器进行软充电。在这种变换器运行中，开关电容器网络的每个支路在一个充电相位单独激活，并使用两个交错的电感器对电容器进行软充放电，以实现高效率，而无需复杂的电容器尺寸或分相操作。为了验证该拓扑结构及其软充电优势，构建了48v -1.8 v 20W变换器实验样机。该变换器在4A负载下40v -1.8 v转换峰值效率为92.4%，48v -1.8 v转换峰值效率为92.1%，电容变化率为20%。

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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2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

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