TY - JOUR
T1 - A full-range formulation for dynamic loss of high-temperature superconductor coated conductors
AU - Zhang, Hongye
AU - Chen, Hongyi
AU - Jiang, Zhenan
AU - Yang, Tianhui
AU - Xin, Ying
AU - Mueller, Markus
AU - Li, Quan
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Dynamic loss is significant for evaluating the performance of type-II high-temperature superconductor (HTS) coated conductors (CC), especially when used in electric machines. Although analytical expressions of dynamic loss have been proposed and verified for HTS CCs exposed to low external magnetic fields with a low current load rate, the non-linearity of dynamic loss at high current load ratios and simultaneous high magnetic fields is still unclear and cannot be predicted by the existing analytical equations. This paper proposes a completely new formulation to characterize the non-linearity of dynamic loss taking into account the Jc(B) dependence of CCs, which can be used for full ranges of both magnetic fields and current load ratios. The proposed analytical formulas have been verified by a T-formulation based numerical model and experiments. This paper comprehensively demonstrates the variation of dynamic loss and provides a meaningful reference of loss controlling for HTS CCs, which is vital for HTS machine windings to avoid quench.
AB - Dynamic loss is significant for evaluating the performance of type-II high-temperature superconductor (HTS) coated conductors (CC), especially when used in electric machines. Although analytical expressions of dynamic loss have been proposed and verified for HTS CCs exposed to low external magnetic fields with a low current load rate, the non-linearity of dynamic loss at high current load ratios and simultaneous high magnetic fields is still unclear and cannot be predicted by the existing analytical equations. This paper proposes a completely new formulation to characterize the non-linearity of dynamic loss taking into account the Jc(B) dependence of CCs, which can be used for full ranges of both magnetic fields and current load ratios. The proposed analytical formulas have been verified by a T-formulation based numerical model and experiments. This paper comprehensively demonstrates the variation of dynamic loss and provides a meaningful reference of loss controlling for HTS CCs, which is vital for HTS machine windings to avoid quench.
UR - https://doi.org/10.1088/1361-6668/ab7b0d
U2 - 10.1088/1361-6668/ab7b0d
DO - 10.1088/1361-6668/ab7b0d
M3 - Letter
SN - 0953-2048
VL - 33
SP - 1
EP - 7
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 5
M1 - 05LT01
ER -