A study on cooling performances and over-current behaviors of GdBCO coils with respect to epoxy impregnation methods

Hyun Jin Shin; Kwang Lok Kim; Yoon Hyuck Choi; Young Gyun Kim; Byeong Soo Go; Minwon Park; Haigun Lee

doi:10.1109/TASC.2014.2372872

A study on cooling performances and over-current behaviors of GdBCO coils with respect to epoxy impregnation methods

Hyun Jin Shin^*
, Kwang Lok Kim
, Yoon Hyuck Choi
, Young Gyun Kim
, Byeong Soo Go
, Minwon Park
, Haigun Lee

^*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

The thermal and electrical stabilities of two epoxy-impregnated GdBCO coils, one wet-wound with epoxy resin every turn and the other impregnated with epoxy resin using vacuum pressure impregnation (VPI) after dry-winding, were evaluated through cool-down, over-current, and repetitive cooling tests. During the cool-down test, the VPI coil showed a more rapid cooling rate compared to the wet-wound coil. The VPI coil also exhibited better thermal and electrical stabilities in the over-current tests because the quench heat could easily be dissipated due to the absence of epoxy between turns. Moreover, in the repetitive cooling tests, the VPI coil exhibited reduced degradation in the superconducting property compared to the wet-wound coil due to lower vulnerability to the discrepancy of thermal contraction between the GdBCO tape and the epoxy resin.

Original language	English
Article number	6963284
Journal	IEEE Transactions on Applied Superconductivity
Volume	25
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2014.2372872
Publication status	Published - 2015 Jun 1

Bibliographical note

Publisher Copyright:
© 2002-2011 IEEE.

Keywords

Epoxy resin
GdBCO
thermal contraction
wet-winding

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2014.2372872

Cite this

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title = "A study on cooling performances and over-current behaviors of GdBCO coils with respect to epoxy impregnation methods",

abstract = "The thermal and electrical stabilities of two epoxy-impregnated GdBCO coils, one wet-wound with epoxy resin every turn and the other impregnated with epoxy resin using vacuum pressure impregnation (VPI) after dry-winding, were evaluated through cool-down, over-current, and repetitive cooling tests. During the cool-down test, the VPI coil showed a more rapid cooling rate compared to the wet-wound coil. The VPI coil also exhibited better thermal and electrical stabilities in the over-current tests because the quench heat could easily be dissipated due to the absence of epoxy between turns. Moreover, in the repetitive cooling tests, the VPI coil exhibited reduced degradation in the superconducting property compared to the wet-wound coil due to lower vulnerability to the discrepancy of thermal contraction between the GdBCO tape and the epoxy resin.",

keywords = "Epoxy resin, GdBCO, thermal contraction, wet-winding",

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AU - Shin, Hyun Jin

AU - Kim, Kwang Lok

AU - Choi, Yoon Hyuck

AU - Kim, Young Gyun

AU - Go, Byeong Soo

AU - Park, Minwon

AU - Lee, Haigun

PY - 2015/6/1

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N2 - The thermal and electrical stabilities of two epoxy-impregnated GdBCO coils, one wet-wound with epoxy resin every turn and the other impregnated with epoxy resin using vacuum pressure impregnation (VPI) after dry-winding, were evaluated through cool-down, over-current, and repetitive cooling tests. During the cool-down test, the VPI coil showed a more rapid cooling rate compared to the wet-wound coil. The VPI coil also exhibited better thermal and electrical stabilities in the over-current tests because the quench heat could easily be dissipated due to the absence of epoxy between turns. Moreover, in the repetitive cooling tests, the VPI coil exhibited reduced degradation in the superconducting property compared to the wet-wound coil due to lower vulnerability to the discrepancy of thermal contraction between the GdBCO tape and the epoxy resin.

AB - The thermal and electrical stabilities of two epoxy-impregnated GdBCO coils, one wet-wound with epoxy resin every turn and the other impregnated with epoxy resin using vacuum pressure impregnation (VPI) after dry-winding, were evaluated through cool-down, over-current, and repetitive cooling tests. During the cool-down test, the VPI coil showed a more rapid cooling rate compared to the wet-wound coil. The VPI coil also exhibited better thermal and electrical stabilities in the over-current tests because the quench heat could easily be dissipated due to the absence of epoxy between turns. Moreover, in the repetitive cooling tests, the VPI coil exhibited reduced degradation in the superconducting property compared to the wet-wound coil due to lower vulnerability to the discrepancy of thermal contraction between the GdBCO tape and the epoxy resin.

KW - Epoxy resin

KW - GdBCO

KW - thermal contraction

KW - wet-winding

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

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ER -

A study on cooling performances and over-current behaviors of GdBCO coils with respect to epoxy impregnation methods

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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