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 |
| Issue number | 2 |
| Early online date | 5 Oct 2016 |
| DOIs | |
| Publication status | Published - 28 Feb 2017 |
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Keywords
- AC current
- charging/discharging test
- NI coil
- quench
- turn-to-turn characteristic resistance
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An experimental investigation of the transient response of HTS non-insulation coil. / Zhang, Zhenyu; Kim, Chul Han; Kim, Jin Geun; Kvitkovic, Jozef; Pamidi, Sastry; Zhang, Min; Li, Jianwei; Yuan, Weijia.
In: Journal of Superconductivity and Novel Magnetism, Vol. 30, No. 2, 28.02.2017, p. 387-393.Research output: Contribution to journal › Article
TY - JOUR
T1 - An experimental investigation of the transient response of HTS non-insulation coil
AU - Zhang, Zhenyu
AU - Kim, Chul Han
AU - Kim, Jin Geun
AU - Kvitkovic, Jozef
AU - Pamidi, Sastry
AU - Zhang, Min
AU - Li, Jianwei
AU - Yuan, Weijia
PY - 2017/2/28
Y1 - 2017/2/28
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.
KW - AC current
KW - charging/discharging test
KW - NI coil
KW - quench
KW - turn-to-turn characteristic resistance
UR - http://www.scopus.com/inward/record.url?scp=84990855014&partnerID=8YFLogxK
UR - https://researchportal.bath.ac.uk/en/publications/an-experimental-investigation-of-the-transient-response-of-hts-no
UR - https://link.springer.com/journal/10948
U2 - 10.1007/s10948-016-3824-4
DO - 10.1007/s10948-016-3824-4
M3 - Article
VL - 30
SP - 387
EP - 393
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
IS - 2
ER -