Study on the Quench Current of YBCO Thin Film FCL

We present the result of a theoretical analysis on the quench current of YBCO thin films for the superconducting resistive fault current limiter. Generally, a transport current exceeds a critical current without quenching and the quench current is usually more than 1.5 times of the critical current....

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2007-06, Vol.17 (2), p.1795-1798
Main Authors: Kaiho, K., Yamasaki, H., Arai, K., Furuse, M., Manabe, T.-A., Sohma, M.
Format: Article
Language:English
Subjects:
Applied sciences
Conduction cooling
Connection and protection apparatus
COPPER OXIDE
Critical current
Critical current (superconductivity)
CURRENT DENSITY
current limiter
Current limiters
Design. Technologies. Operation analysis. Testing
ELECTRICAL CONDUCTIVITY
Electrical engineering. Electrical power engineering
Electronics
Exact sciences and technology
Fault current limiters
Fault currents
High temperature superconductors
Integrated circuits
LIQUID NITROGEN
MATHEMATICAL ANALYSIS
quench current
Quenching
QUENCHING MECHANISMS
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Substrates
Superconducting thin films
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THIN FILMS
Transistors
Voltage
YBCO
YBCO superconductors
Yttrium barium copper oxide
YTTRIUM OXIDE
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Summary:We present the result of a theoretical analysis on the quench current of YBCO thin films for the superconducting resistive fault current limiter. Generally, a transport current exceeds a critical current without quenching and the quench current is usually more than 1.5 times of the critical current. The quench current is calculated theoretically by considering the effects of a small temperature rise DeltaT p . The temperature rise produces the Joule heat increase because the critical current density decreases by the temperature rise. If this Joule heat can not be removed completely by the heat transmission (hDeltaT p ) from the superconductor surface to liquid nitrogen, the superconductor quenches. It is shown that the theoretically calculated quench currents accord with the experimental results.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2007.898965