TY - JOUR
T1 - A new analysis method for accurate supercurrent distribution inside high-temperature superconducting bulk
AU - Yanagawa, Tomohiro
AU - Kaneda, Kazufumi
AU - Ishiyama, Atsushi
AU - Noguchi, So
AU - Yamashita, Hideo
PY - 2006/4
Y1 - 2006/4
N2 - It is difficult to accurately simulate supercurrent in high-temperature superconducting bulk even by adopting the finite-element method. The equivalent electrical conductivity of high-temperature superconducting bulk, which has a strong nonlinearity according to the E- J power law, is introduced for the supercurrent analysis. However, the strong nonlinearity results in bad convergency of the nonlinear equation solvers, i.e., the Newton-Raphson (NR) method. Consequently, the unsuitable and/or undulating supercurrent is observed. Therefore, in this paper, the accuracy of the supercurrent analysis in the high-temperature superconducting bulk is discussed and a new method is proposed for the accurate high-temperature superconducting bulk simulation. Then, the method combined a line search with the NR method is adopted as a nonlinear equation solver, and the improvement of convergency and computation time are investigated.
AB - It is difficult to accurately simulate supercurrent in high-temperature superconducting bulk even by adopting the finite-element method. The equivalent electrical conductivity of high-temperature superconducting bulk, which has a strong nonlinearity according to the E- J power law, is introduced for the supercurrent analysis. However, the strong nonlinearity results in bad convergency of the nonlinear equation solvers, i.e., the Newton-Raphson (NR) method. Consequently, the unsuitable and/or undulating supercurrent is observed. Therefore, in this paper, the accuracy of the supercurrent analysis in the high-temperature superconducting bulk is discussed and a new method is proposed for the accurate high-temperature superconducting bulk simulation. Then, the method combined a line search with the NR method is adopted as a nonlinear equation solver, and the improvement of convergency and computation time are investigated.
KW - E-J power law
KW - High-temperature superconducting (HTS) bulk
KW - Nonlinear equation solver
KW - Supercurrent distribution
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U2 - 10.1109/TMAG.2006.871606
DO - 10.1109/TMAG.2006.871606
M3 - Article
AN - SCOPUS:33645145471
SN - 0018-9464
VL - 42
SP - 751
EP - 754
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 4
ER -