A 6-level Flying Capacitor Multi-level Converter for Single Phase Buck-type Power Factor Correction

Enver Candan, Andrew Stillwell, Nathan C. Brooks, Rose A. Abramson, J. Strydom, R. Pilawa-Podgurski
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引用次数: 15

Abstract

This work investigates behavior of flying capacitor multi-level (FCML) converters in single phase buck-type power factor correction (PFC) applications. Recent developments in FCML converters using GaN transistors are leveraged to improve power density of a single-phase 240 VRMS ac to direct 48 V dc conversion stage in data center power delivery applications. Here, we experimentally demonstrate this concept by using a digitally controlled 6-level FCML converter. The experimental prototype achieves 163 W/in3 by box volume excluding heat sink and twice-line frequency energy buffer. A key contribution of this work is experimental exploration of flying capacitor natural balancing of an FCML buck converter in a single-phase ac-dc conversion where the flying capacitor voltages must swing at 120 Hz.
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一种用于单相降压型功率因数校正的6电平飞容多级变换器
本文研究了飞电容多级(FCML)变换器在单相降压型功率因数校正(PFC)应用中的性能。利用GaN晶体管的FCML转换器的最新发展来提高数据中心供电应用中单相240 VRMS交流到直接48 V直流转换阶段的功率密度。在这里,我们通过使用数字控制的6级FCML转换器实验证明了这一概念。实验样机的箱体体积达到163 W/in3,不包括散热器和双线频能量缓冲器。这项工作的一个关键贡献是实验探索在单相交直流转换中FCML降压变换器的飞行电容器自然平衡,其中飞行电容器电压必须在120 Hz下摆动。
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An Integrated Regulated Resonant Switched-Capacitor DC-DC Converter For PoL Applications A manifold microchannel heat sink for ultra-high power density liquid-cooled converters Ultra-High Power Density Magnetic-less DC/DC Converter Utilizing GaN Transistors A High-Efficiency Super-Junction MOSFET based Inverter-Leg Configuration using a Dual-Mode Switching Technique A 6-level Flying Capacitor Multi-level Converter for Single Phase Buck-type Power Factor Correction
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