An Experimental Investigation of the Transient Response of HTS Non-insulation Coil

Zhenyu Zhang; Chul Han Kim; Jin Geun Kim; Jozef Kvitkovic; Sastry Pamidi; Min Zhang; Jianwei Li; Weijia Yuan

doi:10.1007/s10948-016-3824-4

An Experimental Investigation of the Transient Response of HTS Non-insulation Coil

Zhenyu Zhang, Chul Han Kim, Jin Geun Kim, Jozef Kvitkovic, Sastry Pamidi, Min Zhang, Jianwei Li, Weijia Yuan

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27 Citations (Scopus)

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Abstract

A single pancake coil without turn-to-turn insulation was tested in this paper to investigate the transient responses under different situations. We performed charging and discharging test, AC current test, and regional quench emulation test on the non-insulated (NI) coil. The experimental test results show a significant time delay for charging and discharging characteristics of NI coil and can be validated by a simple proposed equivalent electrical circuit. Under the AC operating current, the NI coil can bypass nearly all the AC current from the coil spiral path to the radial path such that it is not possible for NI coil to store or be affected by the AC magnet field. Additionally, while carrying AC current, the AC loss dissipation of NI coil is inversely proportional to the frequency of the AC operating current. When a regional quench occurs, the NI coil can bypass the current in the regional quench zone to avoid further temperature accumulated and protect the NI coil itself.

Original language	English
Pages (from-to)	387-393
Number of pages	7
Journal	Journal of Superconductivity and Novel Magnetism
Volume	30
DOIs	https://doi.org/10.1007/s10948-016-3824-4
Publication status	Published - 5 Oct 2016
Externally published	Yes

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title = "An Experimental Investigation of the Transient Response of HTS Non-insulation Coil",

abstract = "A single pancake coil without turn-to-turn insulation was tested in this paper to investigate the transient responses under different situations. We performed charging and discharging test, AC current test, and regional quench emulation test on the non-insulated (NI) coil. The experimental test results show a significant time delay for charging and discharging characteristics of NI coil and can be validated by a simple proposed equivalent electrical circuit. Under the AC operating current, the NI coil can bypass nearly all the AC current from the coil spiral path to the radial path such that it is not possible for NI coil to store or be affected by the AC magnet field. Additionally, while carrying AC current, the AC loss dissipation of NI coil is inversely proportional to the frequency of the AC operating current. When a regional quench occurs, the NI coil can bypass the current in the regional quench zone to avoid further temperature accumulated and protect the NI coil itself.",

author = "Zhenyu Zhang and Kim, {Chul Han} and Kim, {Jin Geun} and Jozef Kvitkovic and Sastry Pamidi and Min Zhang and Jianwei Li and Weijia Yuan",

note = "This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.",

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AU - Zhang, Zhenyu

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AU - Kvitkovic, Jozef

AU - Pamidi, Sastry

AU - Zhang, Min

AU - Li, Jianwei

AU - Yuan, Weijia

N1 - This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

PY - 2016/10/5

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N2 - A single pancake coil without turn-to-turn insulation was tested in this paper to investigate the transient responses under different situations. We performed charging and discharging test, AC current test, and regional quench emulation test on the non-insulated (NI) coil. The experimental test results show a significant time delay for charging and discharging characteristics of NI coil and can be validated by a simple proposed equivalent electrical circuit. Under the AC operating current, the NI coil can bypass nearly all the AC current from the coil spiral path to the radial path such that it is not possible for NI coil to store or be affected by the AC magnet field. Additionally, while carrying AC current, the AC loss dissipation of NI coil is inversely proportional to the frequency of the AC operating current. When a regional quench occurs, the NI coil can bypass the current in the regional quench zone to avoid further temperature accumulated and protect the NI coil itself.

AB - A single pancake coil without turn-to-turn insulation was tested in this paper to investigate the transient responses under different situations. We performed charging and discharging test, AC current test, and regional quench emulation test on the non-insulated (NI) coil. The experimental test results show a significant time delay for charging and discharging characteristics of NI coil and can be validated by a simple proposed equivalent electrical circuit. Under the AC operating current, the NI coil can bypass nearly all the AC current from the coil spiral path to the radial path such that it is not possible for NI coil to store or be affected by the AC magnet field. Additionally, while carrying AC current, the AC loss dissipation of NI coil is inversely proportional to the frequency of the AC operating current. When a regional quench occurs, the NI coil can bypass the current in the regional quench zone to avoid further temperature accumulated and protect the NI coil itself.

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JO - Journal of Superconductivity and Novel Magnetism

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An Experimental Investigation of the Transient Response of HTS Non-insulation Coil

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