当前位置: X-MOL 学术Supercond. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Screening current effect on the stress and strain distribution in REBCO high-field magnets: experimental verification and numerical analysis
Superconductor Science and Technology ( IF 3.6 ) Pub Date : 2020-03-18 , DOI: 10.1088/1361-6668/ab7c52
Yufan Yan 1 , Canjie Xin 2 , Mingzhi Guan 2 , Huajun Liu 3 , Yunfei Tan 4 , Timing Qu 1
Affiliation  

Besides screening-current-induced magnetic fields (SCIF), the shielding effect in high-Tc coated conductors also has an strong influence on its strain distribution in a coil winding, especially during high-field operations. To demonstrate this phenomenon, a special experimental setup was designed. With an LTS background magnet and a small HTS insert coil, we were able to carry out direct observations on the hoop strains of a 10-mm wide REBCO sample. Measured data was compared against numerical solutions solved by electromagnetic models based on T -A formulation and homogeneous mechanical models, showing good agreements. An analytical expression was proposed to estimate the maximum radial Lorentz force considering shielding effect. Using the developed numerical models, we further studied the potential effects of two of the mostly investigated methods, which were formerly introduced to reduce SCIF, including multi-filamentary conductors and current sweep reversal (CSR) approach.

中文翻译:

屏蔽电流对 REBCO 高场磁体应力应变分布的影响:实验验证和数值分析

除了屏蔽电流感应磁场 (SCIF),高 Tc 涂层导体的屏蔽效应也对其在线圈绕组中的应变分布有很大影响,尤其是在高场操作期间。为了证明这种现象,设计了一个特殊的实验装置。使用 LTS 背景磁铁和小型 HTS 插入线圈,我们能够对 10 毫米宽 REBCO 样品的环应变进行直接观察。将测量数据与基于 T-A 公式和均匀力学模型的电磁模型求解的数值解进行比较,显示出良好的一致性。提出了一个解析表达式来估计考虑屏蔽效应的最大径向洛伦兹力。使用开发的数值模型,
更新日期:2020-03-18
down
wechat
bug