Experimental and numerical study of a YBCO pancake coil with a magnetic substrate

Experimental and numerical study of a YBCO pancake coil with a magnetic substrate

A finite element model for a YBCO pancake coil with a magnetic substrate is developed in this paper. An axial symmetrical H formulation and the E-J power law are used to construct the model, with the magnetic substrate considered by introducing an extra time-dependent term in the formula. A pancake...

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Veröffentlicht in:Superconductor science & technology 2012-12, Vol.25 (12), p.125020
Hauptverfasser: Zhang, Min, Kvitkovic, J, Pamidi, S V, Coombs, T A
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Sprache:eng
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cuprates superconductors (high tc and insulating parent compounds)
Exact sciences and technology
Physics
Superconductivity
Y-based cuprates
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creator Zhang, Min
Kvitkovic, J
Pamidi, S V
Coombs, T A
description A finite element model for a YBCO pancake coil with a magnetic substrate is developed in this paper. An axial symmetrical H formulation and the E-J power law are used to construct the model, with the magnetic substrate considered by introducing an extra time-dependent term in the formula. A pancake coil is made and tested. The measurement of critical current and transport loss is compared to the model result, showing good consistency. The influence of magnetic substrate in the condition of AC and DC current is studied. The AC loss decreases without a magnetic substrate. It is observed that when the applied DC current approaches the critical current the coil turn loss profile changes completely in the presence of magnetic substrate due to the change of magnetic field distribution.
doi_str_mv 10.1088/0953-2048/25/12/125020
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cuprates superconductors (high tc and insulating parent compounds)
Exact sciences and technology
Physics
Superconductivity
Y-based cuprates
title Experimental and numerical study of a YBCO pancake coil with a magnetic substrate
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