Analytical and empirical studies on the characteristic resistances of no-insulation GdBCO racetrack pancake coil under various operating currents

K. L. Kim; Y. H. Choi; D. G. Yang; D. H. Kang; J. H. Kim; H. M. Kim; H. G. Lee

doi:10.1016/j.cap.2014.10.029

Analytical and empirical studies on the characteristic resistances of no-insulation GdBCO racetrack pancake coil under various operating currents

K. L. Kim, Y. H. Choi, D. G. Yang, D. H. Kang, J. H. Kim, H. M. Kim, H. G. Lee

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

24 Citations (Scopus)

Abstract

This paper presents the effects of the Lorentz force on the electrical behaviors of the no-insulation (NI) GdBCO racetrack pancake (RP) coil without turn-to-turn insulation by performing charging/discharging and sudden-discharging tests. The simulation results of the 2-dimensional finite element method showed that the Lorentz forces were generated towards the center of the winding pack consisting of 60-turn GdBCO CCs, which could enhanced the turn-to-turn contact within the RP coil. The charging/discharging test results indicated that the characteristic resistance (R_c) of the NI RP coil decreased with increasing operating current, which was caused by an increase of the Lorentz force. Further, the results of the sudden-discharging tests exhibited that the Lorentz force was dissipated instantly during the sudden-discharge of the coil, since the operating current immediately decreased to zero. Overall, this study clearly demonstrated that the Lorentz force induced by the operating current exerts the electrical behaviors of an NI RP coil.

Original language	English
Pages (from-to)	8-13
Number of pages	6
Journal	Current Applied Physics
Volume	15
Issue number	1
DOIs	https://doi.org/10.1016/j.cap.2014.10.029
Publication status	Published - 2015 Jan

Bibliographical note

Publisher Copyright:
© 2014 Elsevier B.V.

Keywords

Characteristic resistance
Finite element method
Lorentz force
No-insulation
Pancake coil
Racetrack

ASJC Scopus subject areas

General Materials Science
General Physics and Astronomy

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10.1016/j.cap.2014.10.029

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@article{1783a8e0bf824569a499d90b17b75a58,

title = "Analytical and empirical studies on the characteristic resistances of no-insulation GdBCO racetrack pancake coil under various operating currents",

abstract = "This paper presents the effects of the Lorentz force on the electrical behaviors of the no-insulation (NI) GdBCO racetrack pancake (RP) coil without turn-to-turn insulation by performing charging/discharging and sudden-discharging tests. The simulation results of the 2-dimensional finite element method showed that the Lorentz forces were generated towards the center of the winding pack consisting of 60-turn GdBCO CCs, which could enhanced the turn-to-turn contact within the RP coil. The charging/discharging test results indicated that the characteristic resistance (Rc) of the NI RP coil decreased with increasing operating current, which was caused by an increase of the Lorentz force. Further, the results of the sudden-discharging tests exhibited that the Lorentz force was dissipated instantly during the sudden-discharge of the coil, since the operating current immediately decreased to zero. Overall, this study clearly demonstrated that the Lorentz force induced by the operating current exerts the electrical behaviors of an NI RP coil.",

keywords = "Characteristic resistance, Finite element method, Lorentz force, No-insulation, Pancake coil, Racetrack",

author = "Kim, {K. L.} and Choi, {Y. H.} and Yang, {D. G.} and Kang, {D. H.} and Kim, {J. H.} and Kim, {H. M.} and Lee, {H. G.}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jan,

doi = "10.1016/j.cap.2014.10.029",

language = "English",

volume = "15",

pages = "8--13",

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T1 - Analytical and empirical studies on the characteristic resistances of no-insulation GdBCO racetrack pancake coil under various operating currents

AU - Kim, K. L.

AU - Choi, Y. H.

AU - Yang, D. G.

AU - Kang, D. H.

AU - Kim, J. H.

AU - Kim, H. M.

AU - Lee, H. G.

PY - 2015/1

Y1 - 2015/1

N2 - This paper presents the effects of the Lorentz force on the electrical behaviors of the no-insulation (NI) GdBCO racetrack pancake (RP) coil without turn-to-turn insulation by performing charging/discharging and sudden-discharging tests. The simulation results of the 2-dimensional finite element method showed that the Lorentz forces were generated towards the center of the winding pack consisting of 60-turn GdBCO CCs, which could enhanced the turn-to-turn contact within the RP coil. The charging/discharging test results indicated that the characteristic resistance (Rc) of the NI RP coil decreased with increasing operating current, which was caused by an increase of the Lorentz force. Further, the results of the sudden-discharging tests exhibited that the Lorentz force was dissipated instantly during the sudden-discharge of the coil, since the operating current immediately decreased to zero. Overall, this study clearly demonstrated that the Lorentz force induced by the operating current exerts the electrical behaviors of an NI RP coil.

AB - This paper presents the effects of the Lorentz force on the electrical behaviors of the no-insulation (NI) GdBCO racetrack pancake (RP) coil without turn-to-turn insulation by performing charging/discharging and sudden-discharging tests. The simulation results of the 2-dimensional finite element method showed that the Lorentz forces were generated towards the center of the winding pack consisting of 60-turn GdBCO CCs, which could enhanced the turn-to-turn contact within the RP coil. The charging/discharging test results indicated that the characteristic resistance (Rc) of the NI RP coil decreased with increasing operating current, which was caused by an increase of the Lorentz force. Further, the results of the sudden-discharging tests exhibited that the Lorentz force was dissipated instantly during the sudden-discharge of the coil, since the operating current immediately decreased to zero. Overall, this study clearly demonstrated that the Lorentz force induced by the operating current exerts the electrical behaviors of an NI RP coil.

KW - Characteristic resistance

KW - Finite element method

KW - Lorentz force

KW - No-insulation

KW - Pancake coil

KW - Racetrack

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Analytical and empirical studies on the characteristic resistances of no-insulation GdBCO racetrack pancake coil under various operating currents

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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