Numerical Simulation and Experiment of AC Loss in Quasi-Isotropic Superconducting Strand

With the development of REBCO coated conductor (CC), the high temperature superconducting (HTS) strand with high current capacity and quasi-isotropic performance is expected to have a wide application. However, the alternating current (AC) loss is one of the major obstacles. This paper aims to study...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2020-06, Vol.30 (4), p.1-5
Main Authors: Pi, Wei, Meng, Yiran, Liu, Ziqiu, Ma, Shuwen, Wang, Tengyan, Shi, Qingmei, Dong, Jin, Wang, Yinshun
Format: Article
Language:English
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AC loss
Alternating current
Computer simulation
Conductors
Copper
Critical current density (superconductivity)
Current measurement
Experiments
FEM
Finite element method
four-probe method
High temperature
High-temperature superconductors
Liquid nitrogen
Lock in amplifiers
Loss measurement
Magnetic fields
Mathematical model
Mathematical models
quasi-isotropic strand
Simulation
Superconducting tapes
Superconductivity
Three dimensional models
Transport
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Summary:With the development of REBCO coated conductor (CC), the high temperature superconducting (HTS) strand with high current capacity and quasi-isotropic performance is expected to have a wide application. However, the alternating current (AC) loss is one of the major obstacles. This paper aims to study the AC loss of the quasi-isotropic strand stacked by the second generation (2G) HTS tapes and copper tapes at 77 K. In order to fully understand AC loss characteristics of the stacked-tape conductor, an efficient 3D finite element method (FEM) model based on T-A formulation was adopted in this simulation. The transport AC loss was measured by four-probe method using SR-830 lock-in amplifier at liquid nitrogen (LN 2 ) bath. Moreover, the amplitude and frequency of transport current were also varied in this experiment. The simulation results are consistent with the experiment which is helpful for studying the AC loss of the quasi-isotropic strand.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2020.2976059