A zero-voltage switching, physically flexible multilevel GaN DC-DC converter
A zero-voltage switching, physically flexible multilevel GaN DC-DC converter
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零电压开关、物理灵活的多级 GaN DC-DC 转换器
DOI：
10.1109/ecce.2017.8096615
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
R. Pilawa
中科院分区：
文献类型：
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作者：
Derek Chou;Y. Lei;R. Pilawa
提高电源转换器的功率密度对于系统集成有很多好处。随着系统尺寸不断缩小，热管理、重量、安装位置的一致性以及转换器的占地面积等方面都成为关键因素。飞电容多电平 (FCML) 转换器拓扑很受关注，因为它具有有助于高功率密度的特性。这项工作提出了一种准方波 (QSW) 零电压开关 (ZVS) 多电平 DC-DC 转换器。 ZVS 大大降低了开关损耗，并使转换器能够高频运行。在柔性聚酰亚胺基板电路板上构建了硬件原型。实验结果表明，峰值效率高于98.5%，有效开关频率高达3 MHz，输出功率为250 W。
Improving the power density of a power converter has many benefits for systems integration. Aspects such as thermal management, weight, conformation to mounting locations, and the footprint of the converter all become critical factors as systems continue to scale down in size. The flying-capacitor multilevel (FCML) converter topology is of interest because it has characteristics which contribute to high power density. This work presents a quasi-square-wave (QSW) zero-voltage switching (ZVS) multilevel DC-DC converter. ZVS greatly reduces switching losses and enables high frequency operation of the converter. A hardware prototype is implemented, built on a flexible polyimide substrate circuit board. Experimental results show a peak efficiency above 98.5%, an effective switching frequency of up to 3 MHz, and a power output of 250 W.