金属匝间高温超导无绝缘线圈充电特性研究

Charging characteristics of no-insulation HTS pancake coils with metal turn-to-turn layers

为了减少高温超导无绝缘线圈的充电延迟,采用金属材料作为线圈的匝间添加层。同时,利用有限元仿真软件COMSOL分别建立了普通无绝缘线圈和金属匝间无绝缘线圈的二维轴对称模型,对充电过程进行了仿真研究。仿真结果对比分析表明,具有金属匝间层的无绝缘线圈的充电延迟现象得到了明显改善,延迟时间由15 s缩短到了2 s。金属匝间层的引入,提高了无绝缘线圈的匝间接触电阻率,减少了充电时间的延迟,在需要快速响应的情形中,具有金属匝间层的无绝缘线圈或许会表现出更好的性能。

In this paper,metal turn-to-turn layers were used to reduce the charging delay of no-insulation(NI)HTS pancake coils.Meanwhile,two-dimensional axisymmetric finite element models(FEM)of common insulated HTS coils and no-insulation HTS coils with metal turn-to-turn layers were established by COMSOL,and the charging process of the two coils were simulated.The simulation results show that the charging delay of the NI HTS coils with metal turn-to-turn layers is significantly improved,reduced from 15 s to 2 s.Metal turn-to-turn layers improve the contact resistance of NI HTS coils and reduce the charging delay.In cases where rapid response is required,NI HTS coils may perform better.