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Title: 2-D numerical model for estimation of ac losses in high-{Tc} superconducting tapes

Abstract

A two-dimensional numerical diffusion model which estimates self-field ac losses in High-Tc Superconducting (HTS) tapes is developed. The HTS tape is simulated as a nonlinear conductor whose equivalent resistivity is derived from a power law E-J characteristic. Results of various field quantities and ac losses for a range of currents are presented. It has been shown that for current densities less than the critical value the loss mechanism is mainly hysteretic, as defined by the critical state model. However, as the current approaches its critical value, the tape enters a resistive regime, characterized by flux creep/flow, where the critical state model is no more valid.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Plymouth, Devon (GB)
OSTI Identifier:
20000848
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 66 PHYSICS; MATHEMATICAL MODELS; TWO-DIMENSIONAL CALCULATIONS; AC LOSSES; SUPERCONDUCTING COMPOSITES; SILVER ALLOYS; HIGH-TC SUPERCONDUCTORS; CURRENT DENSITY; NUMERICAL ANALYSIS

Citation Formats

Tami, A., Mahdi, A.E., and Mapps, D. 2-D numerical model for estimation of ac losses in high-{Tc} superconducting tapes. United States: N. p., 1999. Web. doi:10.1109/20.800764.
Tami, A., Mahdi, A.E., & Mapps, D. 2-D numerical model for estimation of ac losses in high-{Tc} superconducting tapes. United States. doi:10.1109/20.800764.
Tami, A., Mahdi, A.E., and Mapps, D. Wed . "2-D numerical model for estimation of ac losses in high-{Tc} superconducting tapes". United States. doi:10.1109/20.800764.
@article{osti_20000848,
title = {2-D numerical model for estimation of ac losses in high-{Tc} superconducting tapes},
author = {Tami, A. and Mahdi, A.E. and Mapps, D.},
abstractNote = {A two-dimensional numerical diffusion model which estimates self-field ac losses in High-Tc Superconducting (HTS) tapes is developed. The HTS tape is simulated as a nonlinear conductor whose equivalent resistivity is derived from a power law E-J characteristic. Results of various field quantities and ac losses for a range of currents are presented. It has been shown that for current densities less than the critical value the loss mechanism is mainly hysteretic, as defined by the critical state model. However, as the current approaches its critical value, the tape enters a resistive regime, characterized by flux creep/flow, where the critical state model is no more valid.},
doi = {10.1109/20.800764},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}