Premium
Development of Nb‐Ti cable with ultrafine filament and high‐resistivity matrix for ac use
Author(s) -
Ohmatsu Kazuya,
Yumura Hiroyasu,
Takahashi KenIchi,
Sato KenIchi,
Ueda Takeshi,
Suganuma Yoshinobu
Publication year - 1997
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/(sici)1520-6416(19970730)120:2<8::aid-eej2>3.0.co;2-9
Subject(s) - electrical resistivity and conductivity , materials science , superconductivity , protein filament , quenching (fluorescence) , magnetic field , transformer , alternating current , composite material , electrical engineering , condensed matter physics , nuclear magnetic resonance , voltage , physics , engineering , quantum mechanics , fluorescence
Superconducting ac machines such as transformers and reactors are expected to have an important role in future electric power transport lines. In these machines, superconducting coils are wound with superconducting cables that have low ac loss, stable ac quenching current, and high normal resistivity. We have developed Nb‐Ti superconducting cables with ultrafine filaments and high‐resistivity matrix for these coils. One such cable is a double‐stranded round structure using 0.2‐mm strands with 0.14‐μm filaments and Cu‐30wt%Ni as a matrix material. The 50‐Hz quenching current without external magnetic field exceeds 1400 Arms. The ac loss is 15 kW/m 3 at a transverse external magnetic field of 0.5 T, 50 Hz, and the normal resistivity is 0.21 Ω/m at 0 T, 10 K. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 120(2): 8–18, 1997