Investigation of HTS racetrack coil without turn-to-turn insulation for superconducting rotating machines

Young Gyun Kim; Seungyong Hahn; Kwang Lok Kim; Oh Jun Kwon; Haigun Lee

doi:10.1109/TASC.2011.2181931

Investigation of HTS racetrack coil without turn-to-turn insulation for superconducting rotating machines

Young Gyun Kim, Seungyong Hahn, Kwang Lok Kim, Oh Jun Kwon, Haigun Lee

Department of Materials Science and Engineering

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

95 Citations (Scopus)

Abstract

This paper reports a study of two HTS racetrack coils wound with GdBCO coated conductors, one without turn-to-turn insulation and the other with Nomex insulation. The coils were characterized by charge-discharge, over-current, and sudden discharge tests. Thermal and electrical characteristics of the GdBCO racetrack coil without insulation outperformed the insulated one. The test results confirmed that although the coil without insulation has a slow charging/discharging time constant, the no-insulation winding technique may enable a compact and protection-free racetrack-typed coil with enhanced mechanical integrity as well as better thermal and electrical stabilities.

Original language	English
Article number	5200604
Journal	IEEE Transactions on Applied Superconductivity
Volume	22
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2011.2181931
Publication status	Published - 2012

Keywords

No-insulation
protection-free
racetrack coil
superconducting rotating machine

ASJC Scopus subject areas

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

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Cite this

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title = "Investigation of HTS racetrack coil without turn-to-turn insulation for superconducting rotating machines",

abstract = "This paper reports a study of two HTS racetrack coils wound with GdBCO coated conductors, one without turn-to-turn insulation and the other with Nomex insulation. The coils were characterized by charge-discharge, over-current, and sudden discharge tests. Thermal and electrical characteristics of the GdBCO racetrack coil without insulation outperformed the insulated one. The test results confirmed that although the coil without insulation has a slow charging/discharging time constant, the no-insulation winding technique may enable a compact and protection-free racetrack-typed coil with enhanced mechanical integrity as well as better thermal and electrical stabilities.",

keywords = "No-insulation, protection-free, racetrack coil, superconducting rotating machine",

author = "Kim, {Young Gyun} and Seungyong Hahn and Kim, {Kwang Lok} and Kwon, {Oh Jun} and Haigun Lee",

note = "Funding Information: Manuscript received September 12, 2011; accepted December 06, 2011. Date of publication December 26, 2011; date of current version May 24, 2012. This work was supported by the Mid-Career Researcher Program through an NRF grant funded by the MEST (2009-0085369), and also by the International Collaborative R&D Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government Ministry of Knowledge Economy.",

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doi = "10.1109/TASC.2011.2181931",

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AU - Kim, Young Gyun

AU - Hahn, Seungyong

AU - Kim, Kwang Lok

AU - Kwon, Oh Jun

AU - Lee, Haigun

N1 - Funding Information: Manuscript received September 12, 2011; accepted December 06, 2011. Date of publication December 26, 2011; date of current version May 24, 2012. This work was supported by the Mid-Career Researcher Program through an NRF grant funded by the MEST (2009-0085369), and also by the International Collaborative R&D Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government Ministry of Knowledge Economy.

PY - 2012

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N2 - This paper reports a study of two HTS racetrack coils wound with GdBCO coated conductors, one without turn-to-turn insulation and the other with Nomex insulation. The coils were characterized by charge-discharge, over-current, and sudden discharge tests. Thermal and electrical characteristics of the GdBCO racetrack coil without insulation outperformed the insulated one. The test results confirmed that although the coil without insulation has a slow charging/discharging time constant, the no-insulation winding technique may enable a compact and protection-free racetrack-typed coil with enhanced mechanical integrity as well as better thermal and electrical stabilities.

AB - This paper reports a study of two HTS racetrack coils wound with GdBCO coated conductors, one without turn-to-turn insulation and the other with Nomex insulation. The coils were characterized by charge-discharge, over-current, and sudden discharge tests. Thermal and electrical characteristics of the GdBCO racetrack coil without insulation outperformed the insulated one. The test results confirmed that although the coil without insulation has a slow charging/discharging time constant, the no-insulation winding technique may enable a compact and protection-free racetrack-typed coil with enhanced mechanical integrity as well as better thermal and electrical stabilities.

KW - No-insulation

KW - protection-free

KW - racetrack coil

KW - superconducting rotating machine

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