升流速率对超导带材临界电流测试的影响

摘要

在高温超导带材的临界电流测试过程中, 电流的升流速度是影响测试效率的关键因素.因此, 对国内外厂商提供的高温超导带材的临界电流值、N值进行了测量和计算, 结合理论和实验对由感应电动势产生的基准电压进行了分析, 对比了不同的升流速率下高温超导带材临界电流测试的结果, 提出了恒定速率升流法测量高温超导带材临界电流的升流速率建议值.%The current sweep rate is an important parameter affecting the measurement efficiency of high temperature superconductor (HTS) tape, while measuring the value of critical current. Hence, we measured and calculated the critical current value and N value of HTS tapes provided by domestic and foreign manufacturers. Combined with theory and experiment, the reference voltage generated by induction electromotive force was analyzed. In this paper, the experimental results of different sweep rates on the critical current measurement of HTS tapes were compared. Meanwhile, a reference value of current sweep rate was put forward, measuring the critical current of the HTS tape by constant sweep rate method.