Quench in high-temperature superconducting motor field coils: Experimental results at 30 K

Stephen D. Umans; Boris A. Shoykhet; Joseph K. Zevchek; Christopher M. Rey; Robert C. Duckworth

doi:10.1109/TASC.2007.899971

Quench in high-temperature superconducting motor field coils: Experimental results at 30 K

Stephen D. Umans, Boris A. Shoykhet, Joseph K. Zevchek, Christopher M. Rey, Robert C. Duckworth

Fusion Technology

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3 Scopus citations

Abstract

The results of quench tests on high-temperature superconducting (HTS) motor coils conduction-cooled to 30 K are presented. In previous tests, the same coils were cooled by direct immersion in liquid nitrogen. In spite of both a significantly lower temperature and a different cooling mechanism, the 30 K tests confirm the previous results which showed that the quench process is characterized by a current level, referred to as the quench current, above which the cooling system cannot maintain the winding temperature. Currents in excess of this value will produce an unstable growth in winding temperature in a process commonly referred to as a coil quench.

Original language	English
Pages (from-to)	1561-1567
Number of pages	7
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899971
State	Published - Jun 2007

Funding

Manuscript received August 27, 2006. This work was funded in part by the U.S. Department of Energy through a Superconductivity Partnership Initiative program under cooperative agreement DE-FC36-93CH10580 with the Reliance Electric Company. S. D. Umans (e-mail: [email protected]).

Funders	Funder number
U.S. Department of Energy	DE-FC36-93CH10580

Keywords

HTS coils
HTS generators
HTS motors
HTS windings
High-temperature superconductors (HTS)
Quench
Quench protection

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10.1109/TASC.2007.899971

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title = "Quench in high-temperature superconducting motor field coils: Experimental results at 30 K",

abstract = "The results of quench tests on high-temperature superconducting (HTS) motor coils conduction-cooled to 30 K are presented. In previous tests, the same coils were cooled by direct immersion in liquid nitrogen. In spite of both a significantly lower temperature and a different cooling mechanism, the 30 K tests confirm the previous results which showed that the quench process is characterized by a current level, referred to as the quench current, above which the cooling system cannot maintain the winding temperature. Currents in excess of this value will produce an unstable growth in winding temperature in a process commonly referred to as a coil quench.",

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AU - Zevchek, Joseph K.

AU - Rey, Christopher M.

AU - Duckworth, Robert C.

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AB - The results of quench tests on high-temperature superconducting (HTS) motor coils conduction-cooled to 30 K are presented. In previous tests, the same coils were cooled by direct immersion in liquid nitrogen. In spite of both a significantly lower temperature and a different cooling mechanism, the 30 K tests confirm the previous results which showed that the quench process is characterized by a current level, referred to as the quench current, above which the cooling system cannot maintain the winding temperature. Currents in excess of this value will produce an unstable growth in winding temperature in a process commonly referred to as a coil quench.

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Quench in high-temperature superconducting motor field coils: Experimental results at 30 K

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