Title :
Magnetization distribution in a superconducting bulk by means of hysteretic material characteristic as constitutive law
Author :
Fabbri, Massimo ; Morandi, Antonio ; Ribani, Pier Luigi
Author_Institution :
Dept. of Electr. Eng., Univ. of Bologna, Italy
fDate :
5/1/2003 12:00:00 AM
Abstract :
A numerical model to calculate the distribution of the magnetization inside a superconducting (SC) bulk, when a time-varying magnetic field is applied, is presented. The model is based on an equivalent magnetic network derived from the magneto-quasistatic form of Maxwell equations and takes into account the SC properties by defining a hysteretic material characteristic. The dynamic electromagnetic behavior of a melt-processed ring-shaped Y-Ba-Cu-O bulk using the pulsed-field magnetization (PFM) process is investigated. The predicted results on the flux trapped in the YBCO bulk by PFM process are compared with the measured ones.
Keywords :
Maxwell equations; barium compounds; flux pinning; high-temperature superconductors; magnetic hysteresis; magnetisation; yttrium compounds; Maxwell equations; PFM; YBaCuO; constitutive law; dynamic electromagnetic behavior; equivalent magnetic network; flux trapping; hysteretic material characteristic; magnetization distribution; magneto-quasistatic form; melt-processed ring-shaped Y-Ba-Cu-O bulk; numerical model; pulsed-field magnetization; superconducting bulk; time-varying magnetic field; Magnetic fields; Magnetic flux; Magnetic hysteresis; Magnetic materials; Magnetization; Maxwell equations; Numerical models; Superconducting magnets; Superconducting materials; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.810551
