Current distribution measurement in YBCO thin film for a superconducting fault current limiter

✍ Scribed by Kenji Shimohata; Shoichi Yokoyama; Takashi Inaguchi; Shiro Nakamura; Yasuo Ozawa

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 413 KB
• Volume: 43
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(03)00048-1

✦ Synopsis

Current distribution in the superconducting film for a resistive fault current limiter is important, because it influences AC loss and a uniformity of S/N transition. The lateral current distribution of the film was reconstructed from the magnetic field distribution which is measured by multiple Hall probes. The following results were obtained. (1) Non-uniform current distribution in the superconducting film was observed when the current was less than 1.3 times of critical current (I c ). ( 2) The current in a superconducting film was uniform when the current was much higher than I c . The current can be considered uniform when the film works as a fault current limiter, because the S/N transition starts about twice of I c . (3) The validity of the measurement was verified by the comparison with the electric circuit simulation.