Alternating Over-Current Characteristics of HTSC Tape Using DFT

The quench characteristics of high-T C superconducting (HTSC) tape for alternating over-current applications have been investigated at various amplitudes of the over-current and its quench developments have been analysed by applying discrete Fourier transform (DFT) for the voltage and the current wa...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2006-06, Vol.16 (2), p.1063-1066
Main Authors: LIM, Sung-Hun, YIM, Seong-Woo, HWANG, Si-Dole, CHOI, Hyo-Sang, HAN, Byoung-Sung
Format: Article
Language:English
Subjects:
Alternating over-current application
Applied sciences
Circuits
Critical current
discrete Fourier transform (DFT)
Discrete Fourier transforms
Electric potential
Electrical engineering. Electrical power engineering
Electronics
Equations
Exact sciences and technology
Fourier transforms
Frequency
Materials
Mathematical analysis
Mathematical models
Power system dynamics
Power system protection
quench developments
Resonant frequency
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting cables
Superconducting devices
Superconducting tapes
Superconducting thin films
Superconductivity
Voltage
Waveforms
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Summary:The quench characteristics of high-T C superconducting (HTSC) tape for alternating over-current applications have been investigated at various amplitudes of the over-current and its quench developments have been analysed by applying discrete Fourier transform (DFT) for the voltage and the current waveforms of HTSC tape. Generally, the HTSC tape shows a broad superconducting and normal transition region above its critical current due to the metal sheath unlike HTSC thin film or HTSC bulk. Moreover, the voltage-current characteristics of HTSC tape are complicated because the quench and the recovery between the superconducting state and the normal state are repeated. In this paper, the alternating over-current experiments for the HTSC tape were performed to analyse its quench developments. The fundamental frequency components for the current and the voltage waveforms of the HTSC tape were abstracted by applying DFT. From those fundamental frequency components, the numerical formula for HTSC tape's resistance has been derived. By applying its numerical formula into circuit equation, the quench developments of HTSC tape dependent on alternating over-current have been estimated and the agreement with the experimental results has been found
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2005.864326