Development and assessment of simplified analytical method for current distribution among REBa2Cu3Oy parallel conductors in armature windings for fully superconducting rotating machines
Development and assessment of simplified analytical method for current distribution among REBa2Cu3Oy parallel conductors in armature windings for fully superconducting rotating machines
复制标题
全超导旋转电机电枢绕组中 REBa2Cu3Oy 并联导体电流分布简化分析方法的开发和评估
DOI：
10.1088/1361-6668/acca4f
复制
发表时间：
2023
影响因子：
3.6
通讯作者：
M. Iwakuma
中科院分区：
文献类型：
--
作者：
S. Miura;A. Kobun;Y. Masuda;H. Miyazaki;A. Kawagoe;H. Sasa;K. Yoshida;S. Sato;M. Iwakuma
采用REBa 2 Cu 3 O y （REBCO， RE=稀土元素或y）超导电枢和磁场线圈的全超导旋转电机，由于其高输出功率密度（kW kg−1），对于飞机应用特别有趣。为了实现超导线圈的大电流能力，我们提出了一种转置多股并联导体的布线设计。在并联导体设计中，除了两端外，REBCO导线彼此绝缘，并在绕组过程中调换，通过消除导线之间的互连磁通来实现均匀的电流分布。本文基于圆柱坐标系下的拉普拉斯方程，提出了一种考虑电感的简化解析方法，粗略计算了电枢线圈条件下多股线圈的电流分布。通过对双股并联线圈的电流分布测量，验证了分析方法的有效性。因此，在实验线圈条件下，分析方法的误差约为10%。为了建立更准确的分析方法，还需要进行一些改进。
Fully superconducting rotating machines employing REBa 2 Cu 3 O y (REBCO, RE= rare earth elements or Y) superconducting armature and field coils, are particularly interesting for aircraft applications, owing to their high output power density (kW kg− 1). To achieve high current capability in superconducting coils, we have proposed a cabling design for transposed multi-strand parallel conductors. In the parallel conductor design, the REBCO strands are insulated from each other, except for both terminal ends, and transposed during the winding process to achieve uniform current distribution by cancellation of interlinkage magnetic flux between the strands. In this study, a simplified analytical method considering inductances was developed based on Laplace's equation in cylindrical coordinates to roughly calculate the current distributions of multi-strands under armature coil conditions. The validity of the analytical method was investigated through current distribution measurements of the sample coils wound with two-strand parallel conductors. Consequently, the analytical method was validated with approximately 10% deviation under the experimental coil conditions. To establish a more accurate analysis method, certain improvements are needed.