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Communication Dans Un Congrès Année : 2016

Modelling of HTS bulk during Pulsed Field Magnetization within an iron core using analytical and integral methods

Résumé

In previous works, we have successfully developed some analytical tools for simulating the magnetic field distribution around a superconductor bulk pellet inside a coil. The superconductor was considered as a perfect diamagnetic material under zero-field cooling condition, i.e. the magnetic vector potential is nil inside the HTS bulk. In this paper, modelling of HTS bulk during Pulsed Field Magnetization (PFM) within an iron core is proposed. Since PFM is a widely used process for HTS bulk magnetization, it seems of great interest to develop fast simulation methods dedicated to such of application. A power law E(J) = Ec(J/Jc)^n, with a critical current density Jc(B) and an exponent n(B) is used to represent the behaviour of the superconducting material. The applied magnetic field that is created by the electromagnet formed by a coil wounded around the central leg of an iron core is calculated using analytical equations based on the resolution of Laplace’s and Poisson’s equations by using the separation of variables method. The magnetic vector potential, the magnetic field and the current density distributions are then computed by means of analytical and integral methods. The integral methods used to model the induced currents in the HTS bulk are based on the well-known “Brandt method” developed in 1998 for disks and cylinders in an axial magnetic field. The trapped magnetic field and other quantities such as losses are then compared with those obtained by finite element analysis. Further developments, including analytical modelling of temperature or adaptive mesh refinement in the superconductor can be also investigated in this paper.
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Dates et versions

hal-01301588 , version 1 (12-04-2016)

Identifiants

  • HAL Id : hal-01301588 , version 1

Citer

Kévin Berger, Hocine Menana, Thierry Lubin, Bruno Douine, Jean Lévêque. Modelling of HTS bulk during Pulsed Field Magnetization within an iron core using analytical and integral methods. 5th International Workshop on Numerical Modelling of High Temperature Superconductors, Jun 2016, Bologna, Italy. p. 48. ⟨hal-01301588⟩
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