Analysis of Dual-Inductor Hybrid Converters for Extreme Conversion Ratios
Analysis of Dual-Inductor Hybrid Converters for Extreme Conversion Ratios
复制标题
极端转换比的双电感混合转换器分析
DOI：
10.1109/jestpe.2020.2985116
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发表时间：
2020
影响因子：
5.5
通讯作者：
Le, Hanh-Phuc
中科院分区：
文献类型：
--
作者：
Das, Ratul;Seo, Gab-Su;Le, Hanh-Phuc
本文提出了一种双电感混合（DIH）转换器，能够高效的非隔离DC-DC转换，具有极大的电压转换比。该变换器拓扑结构结合了开关电容网络和两个交错电感，支持简单的占空比控制以实现输出调节。为了实现所有飞跨电容器的完全软充电，提出并验证了一种优化电容器尺寸的方法。详细分析了两个电感电流，揭示了一种新的和简单的方法来调制它们，其对输出调节和效率的影响，并在实验中证明。采用转换器拓扑结构和设计方法，实现了DIH转换器原型，并在广泛的工作电压范围内进行了测量，从48 V输入提供1-2 V输出，从150 V输入提供1-5 V输出，输出电流高达20 A。该转换器在48 V至2 V/7 A转换时的峰值效率为94.3%，在150 V至5 V/18 A转换时的峰值效率为93.7%。
This article presents a dual-inductor hybrid (DIH) converter that is capable of efficient nonisolated dc–dc conversions with extremely large voltage conversion ratios. The converter topology combines a switched-capacitor network and two interleaved inductors, which supports simple duty-cycle control for output regulation. In order to achieve complete soft charging for all flying capacitors, a method to optimally size the capacitors has been proposed and verified. Detailed analysis of the two inductor currents revealing a new and simple method to modulate them and its impacts on output regulation and efficiency are also provided and demonstrated in experiments. Employing the converter topology and design methods, a DIH converter prototype is implemented and measured for a wide range of operating voltages, providing a 1–2-V output from a 48-V input and a 1–5-V output from a 150-V input with output currents up to 20 A. The converter achieves 94.3% peak efficiency at 48 V-to-2 V/7 A conversion and 93.7% at 150 V-to-5 V/18 A conversion.