Wireless Power Transformation for Data Centers and Medium Voltage Applications
Wireless Power Transformation for Data Centers and Medium Voltage Applications
复制标题
数据中心和中压应用的无线电源转型
DOI：
10.1109/apec39645.2020.9124538
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
P. Ohodnicki
中科院分区：
文献类型：
--
作者：
Guangqi Zhu;Birger Pahl;Zelin Xu;S. Samanta;Isaac Wong;S. Bhattacharya;R. Beddingfield;P. Ohodnicki
无线电力传输 (WPT) 技术已在各种应用中得到广泛探索，包括电动汽车 (EV) 和手机充电。人们对 WPT 在商业或工业应用以及配电方面的使用关注较少。隔离的无线电源链路可以实现触摸安全界面，无需通电触点，从而消除任何电弧闪光或触电危险。例如，这一概念可以在数据中心内实现安全的中压配电，消除使用大型母线和电缆的低压配电，并将大于 1kV 的电压直接引入机架。开发了一种低损耗、高电压传输比无线电源链路和高效中压电源转换器的设计方法。使用 10kW 设计实例对所提出的设计方法进行了评估，并通过有限元分析 (FEA) 和实验测试进行了验证。 WPT变压器采用平面磁结构开发。提出了 U 形铁氧体结构，通过为磁通量提供低磁阻耦合路径来改善互耦合。开发了一种高效电源转换器，可在宽负载范围内以 1kV 输入维持输出电压 (48V)。分析了功率传输效率和损耗分布。
Wireless power transfer (WPT) techniques have been widely explored for various applications including for electric vehicle (EV) and mobile phone charging. Less attention has been paid to the use of WPT for commercial or industrial applications and for power distribution. An isolated wireless power link can enable a touch safe interface without electrically energized contacts eliminating any arc flash or electrocution hazard. This concept can for example enable safe medium voltage distribution inside data centers eliminating low voltage distribution with its large bus bars and cables and bring voltages larger than 1kV directly to the rack. A design methodology is developed for a low loss, high voltage-transfer-ratio wireless power link and a high efficiency medium voltage power converter. The proposed design methodology is evaluated using a 10kW design example and verified by finite element analysis (FEA) and experimental tests. The WPT transformer is developed with a planar magnetics structure. A U-shape ferrite configuration is proposed to improve mutual coupling by providing a low magnetic reluctance coupling path for the magnetic flux. A high efficiency power converter is developed to maintain the output voltage (48V) with a 1kV input over a wide load range. The power transfer efficiency and loss distribution are analyzed.