Topology survey for GaN-based high voltage step-down single-input multi-output DC-DC converter systems

K. George, S. Ang
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引用次数: 6

Abstract

In this work, several dc-dc converter topologies are examined for GaN-based, single-input, multi-output, large step-down applications; namely 200V∼400V dc distribution systems in modern defense, aeronautical, and datacenter industries. Many critical loads in these larger systems are supplied by 48V, 24V, 12V, or lower voltage sources, requiring a significant step-down of the main dc bus voltage. Due to these large conversion ratios, multi-stage schemes will be considered along with single-stage, multi-output converters. A discussion following analysis of each converter and an update on their current state-of-the-art will shed light on those converters that stand to benefit the most from GaN technology, along with a recommendation for a modular, GaN-based, power electronic building block for such DC-DC conversion applications with preference given to those topologies that lend themselves to modularity, high efficiency, and reduced size.
基于氮化镓的高压降压单输入多输出DC-DC变换器系统拓扑研究
在这项工作中,研究了几种基于氮化镓的,单输入,多输出,大降压应用的dc-dc转换器拓扑;即现代国防、航空和数据中心工业中的200V ~ 400V直流配电系统。这些大型系统中的许多关键负载由48V, 24V, 12V或更低的电压源提供,需要主直流母线电压的显著降压。由于这些大的转换比率,多级方案将与单级多输出转换器一起考虑。对每个转换器进行分析后的讨论以及对其当前最新技术的更新将揭示那些从GaN技术中受益最大的转换器,以及针对此类DC-DC转换应用的模块化,基于GaN的电力电子构建块的建议,优先考虑那些具有模块化,高效率和缩小尺寸的拓扑结构。
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