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

Zhang, M and Kvitkovic, J and Pamidi, SV and Coombs, TA (2012) Experimental and numerical study of a YBCO pancake coil with a magnetic substrate. Superconductor Science and Technology, 25. ISSN 0953-2048

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Abstract

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. © 2012 IOP Publishing Ltd.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:21
Last Modified: 08 Dec 2014 02:21
DOI: 10.1088/0953-2048/25/12/125020