TY - JOUR
T1 - A Numerical and Experimental Analysis of the Temperature Dependence of the n-Index for 2G HTS Tape Surrounding the 77 K Temperature Range
AU - Lee, Woo Seung
AU - Nam, Seokho
AU - Kim, Jinsub
AU - Lee, Jeyull
AU - Ko, Tae Kuk
N1 - Publisher Copyright:
© 2002-2011 IEEE.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015/6/1
Y1 - 2015/6/1
N2 - Most superconducting devices are designed for a fixed operating temperature range, however, temperature varia- tions are inevitable in some situations. For example, the temperature of a resistive-type superconducting fault current limiter becomes higher during fault cycle operation. Therefore, knowledge of the temperature dependence of the current-to-voltage characteristic is necessary for accurate simulation or design processes. This paper explores the temperature dependence of the n-index, which describes sharpness of superconductivity to normal transition, using a second-generation high-temperature superconducting tape sample under a liquid nitrogen surrounded environment. The voltage across the sample according to given current and temperature is measured by establishing a measurement system with a protection system. The average of the data from multiple measurements is calculated and compared with three different n-index models. Constant, inversely proportional, and modified inversely proportional models are analyzed. The modified inversely proportional model showed the least error when compared to the measurement data.
AB - Most superconducting devices are designed for a fixed operating temperature range, however, temperature varia- tions are inevitable in some situations. For example, the temperature of a resistive-type superconducting fault current limiter becomes higher during fault cycle operation. Therefore, knowledge of the temperature dependence of the current-to-voltage characteristic is necessary for accurate simulation or design processes. This paper explores the temperature dependence of the n-index, which describes sharpness of superconductivity to normal transition, using a second-generation high-temperature superconducting tape sample under a liquid nitrogen surrounded environment. The voltage across the sample according to given current and temperature is measured by establishing a measurement system with a protection system. The average of the data from multiple measurements is calculated and compared with three different n-index models. Constant, inversely proportional, and modified inversely proportional models are analyzed. The modified inversely proportional model showed the least error when compared to the measurement data.
UR - http://www.scopus.com/inward/record.url?scp=84961321211&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84961321211&partnerID=8YFLogxK
U2 - 10.1109/TASC.2015.2391052
DO - 10.1109/TASC.2015.2391052
M3 - Article
AN - SCOPUS:84961321211
VL - 25
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 7015572
ER -