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高温超导体在需要高磁场的环境中变得越来越有吸引力,其相较于低温超导体有更高的临界磁场上限.在现今高温超导研究领域,高温超导带材以及线圈之间大多都需要焊接,而焊接电阻的存在严重影响了高温超导体工作时的稳定性与持续性.本文针对两种不同规格的第二代高温超导带材YBCO,在同种焊锡下设计不同的焊接长度进行实验,对实验的结果进行分段分析,根据实验结果,得到不同焊接长度下第二代高温超导带材YBCO的焊接电阻分布,利用最小二乘法拟合出焊接电阻-焊接长度的分布函数.提出了一个新的指标Rd用以表征焊接电阻随焊接长度的变化趋势,并且用黄金分割法求出随着焊接长度的增加,焊接电阻变化率的分布情况.进一步得出了各种焊接电阻变化率条件下的最优焊接长度.着重分析了两种规格的高温超导带材YBCO分别在不同的焊接长度条件下的焊接电阻变化情况,最终得到不同规格高温超导带材YBCO分别的最优焊接长度选择方案.
High-temperature superconductors become more attractive in environments that require high magnetic fields and have higher upper critical magnetic fields than low-temperature superconductors.In the field of high-temperature superconductivity, most HTS tapes and coils Both need to be soldered, and the existence of soldering resistance has seriously affected the stability and continuity of high-temperature superconductor working.This paper aims at two different specifications of the second generation of high temperature superconducting tape YBCO, under the same kind of solder design different welding length According to the experimental results, the welding resistance distribution of the second generation high temperature superconducting tape YBCO under different welding lengths was obtained. The distribution function of welding resistance-welding length was fitted by the least square method A new index Rd is proposed to characterize the trend of welding resistance with the welding length, and the golden section method is used to find out the distribution of the rate of change of the welding resistance with the increase of welding length.Furthermore, the welding resistance The optimal welding length under the condition of rate of change.The paper mainly analyzes the welding electricity of YBCO of two kinds of high temperature superconducting tapes under different welding length conditions Changes, different specifications finally obtained YBCO HTS tapes are optimal welding length options.