A Study on the No Insulation Winding Method of the HTS Coil
A Study on the No Insulation Winding Method of the HTS Coil
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DOI：
10.1109/tasc.2011.2175892
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发表时间：
2012-06-01
影响因子：
1.8
通讯作者：
Ko, Tae Kuk
中科院分区：
文献类型：
--
作者：
Choi, Sukjin;Jo, Hyun Chul;Ko, Tae Kuk
本文报道了BSCCO和ReBCO高温超导（HTS）试验线圈的研究，层绕和双饼，有和没有匝间绝缘。在液氮浴中进行过电流测试，以比较测试线圈在77 K下的稳定性。观察到NI（无绝缘）线圈（BSCCO和ReBCO）的磁场饱和，这是由于在高于临界电流的工作电流下，局部失超中通过匝间触点的电流旁路。在NI ReBCO线圈中，在高于线圈临界电流的工作电流下发生全局失超，并且在线圈放电期间观察到失超恢复。实验结果表明，NI绕法可显著提高高温超导线圈的热稳定性。
This paper reports a study on BSCCO and ReBCO HTS (high temperature superconducting) test coils, layer-wound and double-pancake, with and without turn-to-turn insulation. Over current tests were performed in a bath of liquid nitrogen to compare stabilities of the test coils at 77 K. Saturation of magnetic fields from the NI (no insulation) coils, both BSCCO and ReBCO, was observed owing to current bypassing through turn-to-turn contacts in local quenches at operating currents higher than their critical currents. In the NI ReBCO coils, global quenches occurred at operating currents higher than the coil critical currents and quench recoveries were observed during discharge of the coils. The experimental results, obtained to date, demonstrate that the NI winding method enables remarkable improvement of thermal stability of the HTS coils.