Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications
Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications
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DOI：
10.1088/1361-6668/aaebd8
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发表时间：
2018-11
影响因子：
3.6
通讯作者：
Yingda He;Yu Wang;Yanwen Hu;Wei-rong Chen;Zhongming Yan
中科院分区：
文献类型：
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作者：
Yingda He;Yu Wang;Yanwen Hu;Wei-rong Chen;Zhongming Yan
首次报道了超导体-绝缘体-超导体结构形式的高温超导（HTS）电极电容器（HTS电容器）。双面高温超导薄膜可能本质上适合高温超导电容器的原材料选择。在电极材料方面，高温超导薄膜的表面电阻比普通导体低得多，并且作为电介质，其基材通常比一些传统电容器的电介质层具有较大的介电常数，但损耗角正切较小。因此，可以制造基于双面HTS薄膜的高质量电容器。这种类型的 HTS 电容器可以在无线功率传输 (WPT) 技术中发挥作用，因为 WPT 效率取决于线圈和电容器的品质因数。已经进行了大量研究来优化带有 HTS 线圈的 WPT 系统。相比之下，我们开发了一种用于 WPT 应用的基于双面 YBCO 薄膜的 HTS 电容器，并研究了其对 WPT 系统的影响。结果发现，该HTS电容器可以提供高品质因数，提高WPT效率，并在77 K下与HTS线圈正常工作，避免了HTS线圈和普通电容器之间的困境。
A high-temperature superconducting (HTS) electrode capacitor (HTS capacitor) has been reported for the first time in the form of a superconductor–insulator–superconductor structure. Double-sided HTS thin film might be inherently suitable for the raw material choice of an HTS capacitor. In terms of electrode material, HTS thin film has a much lower surface resistance than normal conductors, and, as a dielectric medium, its substrate generally has a larger dielectric constant but a smaller loss tangent than the dielectric layers of some conventional capacitors. Thus, it is possible to fabricate a high-quality capacitor based on double-sided HTS thin film. This type of HTS capacitor could play a role in wireless power transfer (WPT) technology, since the WPT efficiency depends on the quality factors of both the coil and capacitor. Numerous studies have been performed to optimize the WPT system with HTS coil. In contrast, we develop an HTS capacitor based on double-sided YBCO film for WPT applications and investigate its effect on the WPT system. It is found that the HTS capacitor can provide a high quality factor, enhance WPT efficiency, and work normally with an HTS coil at 77 K, avoiding the dilemma between an HTS coil and a normal capacitor.