AC loss calculation in high-temperature superconductor wires and windings with analytical and numerical models: Influence of J$_{c}$(B) dependence

Grilli, Francesco; Abraham, Sunny; Brambilla, Roberto

Abstract:

Too high loss levels can severely limit the efficiency and the safe operation of several high-temperature superconductor (HTS) AC applications. A reliable estimation of AC losses, which includes the observed field-dependence of the superconductor's critical current density on the magnetic field, is therefore paramount. In this contribution, we use numerical simulations to evaluate the AC losses of HTS coated conductors in a variety of working scenarios: individual wires carrying AC transport current and/or subjected to AC magnetic fields, and wire assemblies like stacks and arrays carrying AC transport current. Numerical results are compared to the corresponding analytical models and to experimental results. This work presents some general guidelines regarding the extent to which the dependence of the critical current density J$_{c}$ on the magnetic flux density B modifies the AC loss characteristics with respect to a constant-J$_{c}$ model based on the superconductor's self-field critical current.

 Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP) Publikationstyp Proceedingsbeitrag Publikationsjahr 2021 Sprache Englisch Identifikator ISSN: 1742-6588 KITopen-ID: 1000136803 HGF-Programm 38.05.03 (POF IV, LK 01) High Temperature Superconductivity Erschienen in 33rd International Symposium on Superconductivity (ISS2020), 1-3 December 2020, Tsukuba, Japan Veranstaltung 33rd International Symposium on Superconductivity (ISS 2020), Ibaraki, Japan, 01.12.2020 – 03.12.2020 Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd) Seiten Art.-Nr.: 012038 Serie Journal of Physics: Conference Series ; 1975 Nachgewiesen in DimensionsScopus
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