Modélisation 3D par la MEF et couplage circuit du procédé d'aimantation impulsionnel d'un ensemble de pastilles supraconductrices massives

Abstract : A superconductor can induce currents when exposed to a variation of an external magnetic field, created for example by a pulsed current flowing through a coil. As these induced currents circulate indefinitely, a trapped magnetic field is generated, which is the remaining magnetic field produced by the superconductor alone when the applied magnetic field has disappeared. This process is called Pulse Field Magnetization (PFM). In this article, we are interested in the modeling of the PFM of an array of several High Temperature Superconducting (HTS) pellets. A 3D model has been developed, based on the Finite Element Method (FEM), and coupled with an external electrical circuit. In this model, A and H formulations are coupled using appropriate boundary conditions to take advantage of each other in specific regions. The presented results are the current density during the magnetization process and the trapped magnetic field trapped in the HTS. These results highlight the need to model such a problem in 3D.
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Jakub Kapek, Kévin Berger, Jean Lévêque. Modélisation 3D par la MEF et couplage circuit du procédé d'aimantation impulsionnel d'un ensemble de pastilles supraconductrices massives. Jeunes Chercheurs en Génie Électrique (JCGE'2019) - SEEDS, Jun 2019, Saint-Pierre d'Oléron, France. p. 7, id. 269999, 6 p. ⟨hal-02296187⟩

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