Wednesday, June 26, 2013

1306.6006 (Roberto Brambilla et al.)

Integral Equations for Computing AC Losses of Radially and Polygonally
Arranged HTS Thin Tapes

Roberto Brambilla, Francesco Grilli, Luciano Martini
In this paper we derive the integral equations for radially and polygonally arranged high-temperature superconductor thin tapes and we solve them by finite-element method. The superconductor is modeled with a non-linear power law, which allows the possibility of considering the dependence of the parameters on the magnetic field or the position. The ac losses are computed for a variety of geometrical configurations and for various values of the transport current. Differences with respect to existing analytical models, which are developed in the framework of the critical state model and only for certain values of the transport current, are pointed out.
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