基于YBCO高温超导线圈的新型无线供电悬浮系统电能传输特性研究  

Characterization of a New Wireless Power Supply Suspension System Based on YBCO High Temperature Superconducting Coil

作　　者：郑智强 翁廷坤 李卓[1,2] 申刘飞 黄守道 翟雨佳[1,2,3] Zheng Zhiqiang;Weng Tingkun;Li Zhuo;Shen Liufei;Huang Shoudao;Zhai Yujia(College of Electrical and Information Engineering Hunan University,Changsha 410082 China;State Key Laboratory of Offshore Wind Power Equipment and High-Efficient Utilization Wind Energy,Changsha 410082 China;Institute of Electrical Engineering China Academy of Sciences,Beijing 100190 China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]海上风力发电装备与风能高效利用全国重点实验室,长沙410082 [3]中国科学院电工研究所,北京100190

出　　处：《电工技术学报》2024年第17期5278-5288,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52177019);中国科学技术协会青年人才托举计划(2021QNRC001);湖南省创新平台与人才计划-湖湘青年英才(2021RC3058)资助项目。

摘　　要：近年来,以氧化钇钡铜(YBCO)为代表的第二代高温超涂层导体以其在20~77K温区下极高的载流能力以及优越的力学性能和电磁性能,被广泛应用于电力、医疗、交通、军事、能源等领域。该文设计并构造了一种基于YBCO高温超导线圈的小型充电悬浮系统,该系统可以同时实现无线充电和自稳定悬浮功能,可应用于为小型物体无线供电悬浮展示。通过理论推导和有限元仿真分析发现,将低电阻、高载流密度的高温超导线圈引入无线充电系统中,可使系统的输出功率和输出效率都有显著的提高,最大分别提高了3倍和2.6倍,在低频段提升效果尤为明显。此外,实验表明该系统在10 mm悬浮高度范围内可以保持稳定悬浮和负载电压的高效输出,解决了现有电磁悬浮和电动悬浮技术中需要设计特定磁路结构和安装内置电池或电源而导致装置复杂及持续供电时间较短等问题,为超导无线电能传输技术的应用开辟了新方向。In recent years,the second-generation high temperature superconducting(HTS)coated conductor,particularly Yttrium Barium Copper Oxide(YBCO),has been widely applied in fields including electric power,medicine,transportation,military,and energy.This is due to its high current-carrying capacity and superior mechanical and electromagnetic properties within the 20~77 K temperature range.A compact charging suspension system based on the HTS coil is designed,which can simultaneously realize wireless charging and self-stabilized suspension,and can be applied to wireless power supply suspension exhibition for small objects.This innovative system solves the issues of complex devices and limited continuous power supply time caused by the need todesign a specific magnetic circuit structure and install a built-in battery or power supply in the existing electromagnetic levitation and electrodynamic suspension technology.Through theoretical derivation and finite element analysis,it demonstrates that introducing the HTS coil with low resistance and high current density into the wireless power transfer(WPT)system can significantly enhance the output power and efficiency of the system,with a maximum increase of 3 times and 2.6 times,respectively.Specifically,the output power growth rate of the HTS-Cu WPT system increases from 54%to 199%,and the output efficiency growth rate increases from 88%to 162%,compared to studies done on the transmission performance of the Cu-Cu WPT system and the HTS-Cu WPT system at different suspension heights.Furthermore,the study compared the properties of copper and HTS coils,finding that the AC resistance of the HTS coil consistently remains lower than that of the copper coil under identical conditions.As the system frequency decreases,the disparity in the quality factor Q between the copper and HTS coils widens,suggesting that incorporating an HTS coil in the low-frequency range significantly enhances the transmission performance of the WPT system.Additionally,the frequency characteristics of the load

关 键 词：高温超导线圈 无线电能传输 有限元仿真 传输性能 超导磁悬浮 

分 类 号：TM12[电气工程—电工理论与新技术]