Study on Current Limiting Characteristics of YBCO Thin-Film Wire with Insulation Layer

When applying superconducting wire to power machines, an investigation needs to be carried out on thecharacteristics of wire phase changes in connection with the insulating layer. This study examined trends in theincrease of the wire’s resistance and the characteristics of its recovery from quenching by a current-applied cycleat temperatures of 90 K, 180 K, and 250 K. The procedure was conducted based on the thickness and presence (orabsence) of the insulating wire layers.To achieve this, YBCO thin-film wires with the same critical temperatures were prepared with copper and stainlesssteel stabilizing layers. At levels (-one, three, and five-), with superior performance, polyimide pressure-sensitiveadhesive tape was attached to the wires at a very low temperature. The eight prepared test samples were woundaround the linear frames. The wire’s voltage and current created from the phase change characteristics weremeasured at the wire’s prescribed temperature, using the four-point probe method. The wire’s resistance and recoverycharacteristics were examined for each cycle at temperatures of 90 K, 180 K, and 250 K.