Demonstration of the stress-minimized force-balanced coil concept for SMES
Demonstration of the stress-minimized force-balanced coil concept for SMES
复制标题
演示 SMES 的应力最小化力平衡线圈概念
DOI：
10.1109/tasc.2003.812924
复制
发表时间：
2003
影响因子：
1.8
通讯作者：
R. Shimada
中科院分区：
文献类型：
--
作者：
S. Nomura;H. Tsutsui;N. Watanabe;C. Suzuki;S. Kajita;Y. Ohata;T. Takaku;E. Koizumi;S. Tsuji;R. Shimada
超导磁储能系统中的强磁场和线圈电流引起的强电磁力是一个严重的问题。针对这一问题，我们提出了力平衡线圈（Force-BalancedCoil，FBC）的概念。基于维里定理，FBC可以通过选择最佳的极向匝数来最小化能量存储的结构要求。我们设计并制作了一个小型的实验装置，它是由内、外螺旋线圈组成的相互相反的环形方向缠绕NbTi超导体。通过选择内外线圈电流的最佳电流比，可以改变器件中工作应力的分布。从实验结果中，我们证明了FBC概念的有效性。
Strong electromagnetic force caused by high magnetic field and coil current is a serious problem in SMES systems. In facing this problem, we proposed the concept of Force-Balanced Coil (FBC) which is a helically wound toroidal coil. Based on the virial theorem, the FBC can minimize structure requirements for energy storage by selecting an optimal number of poloidal turns. We designed and fabricated a small experimental device which is composed of inner and outer helical coils mutually wound in opposite toroidal directions using NbTi superconductors. The distribution of the working stresses in this device can be changed by selecting the optimal current ratios between inner and outer coil currents. From the experimental results, we demonstrated the validity of the FBC concept.