Abstract
This paper presents a fully three-dimensional (3D) electromagnetic nonlinearmodel for superconducting cable samples. The model is characterized by a timedomain integral formulation of Maxwell’s equations in the magneto-quasistaticlimit coupled to a nonlinear characteristic of conductors. In order to accountfor the subcable wrapping, contact resistances among adjacent conductors andstrand coating, infinitely thin resistive barriers are accounted for in the model.The model is fed through an externally applied magnetic field as well as by anexternal feeding circuitry, which interacts with the integral 3D model by means ofvoltage- and current-driven electrodes. The model is discretized using the edgeelements and, in particular, a suitable linear combination of them are used as basisand test functions, to account for the presence of the electrodes as well as formultiply connected conducting domains. The model is applied to the analysis of anITER full-size CICC sample. Key surface parameters are identified from availabletransverse resistance measurements. The analysis presented here, compared to theexperimental results, shows the consistency of the model with the experiments.
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