Contactless DC Connector Based on GaN LLC Converter for Next-Generation Data Centers
Contactless DC Connector Based on GaN LLC Converter for Next-Generation Data Centers
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DOI：
10.1109/tia.2014.2387481
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发表时间：
2015-01
影响因子：
4.4
通讯作者：
Y. Hayashi;H. Toyoda;T. Ise;A. Matsumoto
中科院分区：
文献类型：
--
作者：
Y. Hayashi;H. Toyoda;T. Ise;A. Matsumoto
一种感应耦合非接触式直流连接器已被提出用于数据中心的下一代380 V直流配电系统。采用氮化镓（GaN）功率晶体管的LLC谐振DC-DC变换器拓扑实现了短距离高效非接触电能传输。一个1.2千瓦的384- 192-V连接器的原型已经制造和超过95%的转换效率与8.1 W/cm 3的功率密度已被实验证实在1000 kHz的操作。考虑到GaN功率器件的特性和Transformer磁芯材料的特性，已经进行了设计考虑，并且还示出了实现10.0 W/cm 3的潜力。非接触式直流连接器将隔离式直流-直流转换器的功能集成到连接器中，以节省空间，并且由于电感耦合，直流电流可以在没有电弧的情况下切断。所提出的连接器有助于实现高效、节省空间和可靠的未来380 V直流配电系统。
An inductively coupled contactless dc connector has been proposed for the next-generation 380-V dc distribution system in data centers. A LLC resonant dc-dc converter topology with gallium nitride (GaN) power transistors has been applied to realize the short-distance highly efficient contactless power transfer. A prototype of a 1.2-kW 384- to 192-V connector has been fabricated and the conversion efficiency of over 95% with the power density of 8.1 W/cm3 has been confirmed experimentally under 1000-kHz operation. The design consideration has been carried out and the potential to achieve 10.0 W/cm3 has been also shown taking the feature of the GaN power device and the characteristics of the magnetic core material for the transformer into account. The contactless dc connector integrates the functioning of an isolated dc-dc converter into a connector for space saving, and the dc current can be cut off without arc because of the inductive coupling. The proposed connector contributes to realizing a highly efficient, space saving, and reliable future 380-V dc distribution system.