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Basic characteristics of high‐ T c superconductor as a current‐limiting element
Author(s) -
Nakamura Koichi,
Ito Yasukazu,
Kawashima Takao
Publication year - 1992
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391120508
Subject(s) - superconductivity , current limiting , schematic , current (fluid) , limiting , critical current , materials science , high temperature superconductivity , condensed matter physics , limiting current , electrical engineering , analytical chemistry (journal) , physics , thermodynamics , chemistry , electrode , mechanical engineering , engineering , electrochemistry , chromatography , quantum mechanics
This paper shows the basic characteristics of a current‐limiting element for the power system using y ‐type high‐ T c superconductor. (1) A YBa 2 Cu 3 O x ‐type superconductor was produced. Its size was 4.7 × 1.5 × 47 mm. (2) Current I and voltage V were measured under the low temperature of 50 to 100 K. (3) The flow resistance and the resistance of the element were defined and evaluated from the I ‐ V characteristics obtained under the conditions of lower temperature than the critical value T c , and larger current density than the critical value J c . (4) The resistance value change due to temperature rise also was evaluated under the larger current than the critical current. (5) A schematic calculation was tried for practical use in some system condition.