Quench detection/protection of an HTS coil by AE signals

M. Yoneda; N. Nanato; D. Aoki; T. Kato; S. Murase

doi:10.1016/j.physc.2011.05.210

Quench detection/protection of an HTS coil by AE signals

M. Yoneda, N. Nanato, D. Aoki, T. Kato, S. Murase

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The normal zone propagation velocities in high T_c superconductors are slow at high operation temperature and therefore local and excessive temperature rise generates at quench occurrence, and then the superconductors are degraded or burned. Therefore it is essential to detect the temperature rise in high T_c superconducting (HTS) coils as soon as possible and protect them. The authors have presented a quench detection method for HTS coils by time-frequency visualization of AE signals and have shown its usefulness for a HTS coil with height and outer diameter of 40-50 mm. In this paper, the authors present a quench detection/protection system based on superior method in quench detection time to the previous method and show its usefulness for a larger HTS coil (height and outer diameter: 160-190 mm) than the previous coil.

Original language	English
Pages (from-to)	1432-1435
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	471
Issue number	21-22
DOIs	https://doi.org/10.1016/j.physc.2011.05.210
Publication status	Published - Nov 2011
Externally published	Yes

Keywords

Acoustic emission(AE)
Quench detection/protection

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2011.05.210

Cite this

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title = "Quench detection/protection of an HTS coil by AE signals",

abstract = "The normal zone propagation velocities in high Tc superconductors are slow at high operation temperature and therefore local and excessive temperature rise generates at quench occurrence, and then the superconductors are degraded or burned. Therefore it is essential to detect the temperature rise in high Tc superconducting (HTS) coils as soon as possible and protect them. The authors have presented a quench detection method for HTS coils by time-frequency visualization of AE signals and have shown its usefulness for a HTS coil with height and outer diameter of 40-50 mm. In this paper, the authors present a quench detection/protection system based on superior method in quench detection time to the previous method and show its usefulness for a larger HTS coil (height and outer diameter: 160-190 mm) than the previous coil.",

keywords = "Acoustic emission(AE), Quench detection/protection",

author = "M. Yoneda and N. Nanato and D. Aoki and T. Kato and S. Murase",

note = "Funding Information: This work was supported by JGC-S Scholarship Foundation, Power Academy and CASIO Science Promotion Foundation.",

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language = "English",

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journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Quench detection/protection of an HTS coil by AE signals

AU - Yoneda, M.

AU - Nanato, N.

AU - Aoki, D.

AU - Kato, T.

AU - Murase, S.

N1 - Funding Information: This work was supported by JGC-S Scholarship Foundation, Power Academy and CASIO Science Promotion Foundation.

PY - 2011/11

Y1 - 2011/11

N2 - The normal zone propagation velocities in high Tc superconductors are slow at high operation temperature and therefore local and excessive temperature rise generates at quench occurrence, and then the superconductors are degraded or burned. Therefore it is essential to detect the temperature rise in high Tc superconducting (HTS) coils as soon as possible and protect them. The authors have presented a quench detection method for HTS coils by time-frequency visualization of AE signals and have shown its usefulness for a HTS coil with height and outer diameter of 40-50 mm. In this paper, the authors present a quench detection/protection system based on superior method in quench detection time to the previous method and show its usefulness for a larger HTS coil (height and outer diameter: 160-190 mm) than the previous coil.

AB - The normal zone propagation velocities in high Tc superconductors are slow at high operation temperature and therefore local and excessive temperature rise generates at quench occurrence, and then the superconductors are degraded or burned. Therefore it is essential to detect the temperature rise in high Tc superconducting (HTS) coils as soon as possible and protect them. The authors have presented a quench detection method for HTS coils by time-frequency visualization of AE signals and have shown its usefulness for a HTS coil with height and outer diameter of 40-50 mm. In this paper, the authors present a quench detection/protection system based on superior method in quench detection time to the previous method and show its usefulness for a larger HTS coil (height and outer diameter: 160-190 mm) than the previous coil.

KW - Acoustic emission(AE)

KW - Quench detection/protection

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VL - 471

SP - 1432

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 21-22

ER -

Quench detection/protection of an HTS coil by AE signals

Abstract

Keywords

ASJC Scopus subject areas

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