Journal ArticleDOI
Numerical solution of critical state in superconductivity by finite element software
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In this paper, a numerical method is proposed to analyse the electromagnetic behavior of systems including high-temperature superconductors (HTSCs) in time-varying external fields and superconducting cables carrying AC transport current.Abstract:
A numerical method is proposed to analyse the electromagnetic behaviour of systems including high-temperature superconductors (HTSCs) in time-varying external fields and superconducting cables carrying AC transport current. The E–J constitutive law together with an H-formulation is used to calculate the current distribution and electromagnetic fields in HTSCs, and the magnetization of HTSCs; then the forces in the interaction between the electromagnet and the superconductor and the AC loss of the superconducting cable can be obtained. This numerical method is based on solving the partial differential equations time dependently and is adapted to the commercial finite element software Comsol Multiphysics 3.2. The advantage of this method is to make the modelling of the superconductivity simple, flexible and extendable.read more
Citations
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Journal ArticleDOI
Computation of Losses in HTS Under the Action of Varying Magnetic Fields and Currents
TL;DR: This paper presents a literature review of the methods for computing ac losses in HTS tapes, wires, and devices and provides an estimation of the losses occurring in a variety of power applications.
Journal ArticleDOI
Calculation of alternating current losses in stacks and coils made of second generation high temperature superconducting tapes for large scale applications
Victor M. R. Zermeno,Asger Bech Abrahamsen,Nenad Mijatovic,Bogi Bech Jensen,Mads Peter Sørensen +4 more
TL;DR: In this article, a homogenization method to model a stack of second generation High Temperature Superconducting tapes under AC applied transport current or magnetic field has been obtained, where the idea is to find an anisotropic bulk equivalent for the stack such that the geometrical layout of the internal alternating structures of insulating, metallic, superconducting, and substrate layers is washed out while keeping the overall electromagnetic behavior of the original stack.
Journal ArticleDOI
Calculation of AC losses in stacks and coils made of second generation high temperature superconducting tapes for large scale applications
Victor M. R. Zermeno,Asger Bech Abrahamsen,Nenad Mijatovic,Bogi Bech Jensen,Mads P. Soerensen +4 more
TL;DR: In this paper, a homogenization method to model a stack of second generation (2G) HTS tapes under AC applied transport current or magnetic field has been obtained, where the idea is to find an anisotropic bulk equivalent for the stack, such that the geometrical layout of the internal alternating structures of insulating, metallic, superconducting and substrate layers is "washed" out while keeping the overall electromagnetic behavior of the original stack.
Journal ArticleDOI
An efficient 3D finite element method model based on the T–A formulation for superconducting coated conductors
TL;DR: In this article, an efficient 3D finite element method numerical model for superconducting coated conductors is proposed, which is based on the T-A formulation and can be used to tackle 3D computational challenges for supercondors with high aspect ratios.
Journal ArticleDOI
Modelling of bulk superconductor magnetization
TL;DR: In this paper, the authors present a topical review of the current state of the art in modelling the magnetization of bulk superconductors, including both (RE)BCO (where RE?=?rare earth or Y) and MgB2 materials.
References
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Numerical modelings of superconducting wires for AC loss calculations
TL;DR: In this paper, a series of numerical models of superconducting tapes based on the finite element method has been developed to estimate their AC loss, and the current distribution in a short piece of a single tape exposed to AC magnetic field is also calculated.