标题： 直流特性测试的圆形环氧树脂浸渍高温超导（HTS）线圈 显示英文标题

标题： DC Characterization of a Circular, Epoxy-Impregnated High Temperature Superconducting (HTS) Coil

摘要： 直流（DC）特性测试对于高温超导（HTS）线圈在高温超导应用中的重要性，例如电动机、超导磁能存储（SMES）和变压器。在本文中，介绍了用于原型轴向磁场HTS电动机的圆形环氧树脂浸渍HTS线圈的直流特性测试。在测量过程中，线圈内部使用了多个电压抽头，以提供关于其直流行为随长度变化的更详细信息。基于实验结果，发现线圈中高温超导体的长度上存在非均匀区域，导致线圈的超导性能不理想。通过研究不同区域的电流-电压（I-V）曲线，发现HTS线圈的非均匀部分存在n值减小和临界电流的现象。 显示英文摘要

摘要： Direct current (DC) characterization of high temperature superconducting (HTS) coils is important for HTS applications, such as electric machines, superconducting magnetic energy storage (SMES) and transformers. In this paper, DC characterization of a circular, epoxy-impregnated HTS coil made from YBCO coated conductor for use as a prototype axial flux HTS electric machine is presented. Multiple voltage taps were utilized within the coil during measurement to help provide further detailed information on its DC behavior as a function of length. Based on the experimental results, there exist regions of non-uniformity along the length of superconductor in the coil, resulting in non-ideal superconducting properties of the coil. By studying the current-voltage (I-V) curves across different regions, it is found that a decreasing n-value and critical current exists in the non-uniform parts of the HTS coil.