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Caractérisations physicochimique et magnétique de rubans nanocristallins à haute perméabilité et étude de leur intégration en électronique de puissance

Abstract : Nanocrystalline alloys are recent magnetic materials and the behavioural laws described and used for the elaboration process are not established for industrially high performances alloys. After a short talk on nanocrystalline specificity, and on the basis of industrial account about their performance decreases due to packaging constraints, we focused on the analysis and comprehension of magnetization mechanism. The magnetoelastic effects are pointed out and the discrimination of the various sources of anisotropy are then put forward. The outcome of manufacturing process and the high dynamic performances of nanocrystalline alloys suggest them as first-rate materials in power electronics applications. The magnetic high frequency characterizations of these materials are of great interest for power designer to optimize magnetic components size/cost, as well as for manufacturers to provide a feedback to elaboration process (compositions and heat treatments). In this context, we propose here to develop a high frequency characterization of FeCuNbSiB, assuming losses prediction and hysteresis loop calculation based on a Loss Surface model (LS) and an optimization procedure to evaluate global performances of the materials in power electronics design framework.
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https://tel.archives-ouvertes.fr/tel-00740409
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Submitted on : Wednesday, October 10, 2012 - 10:35:06 AM
Last modification on : Friday, March 25, 2022 - 11:08:40 AM
Long-term archiving on: : Friday, January 11, 2013 - 3:40:26 AM

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  • HAL Id : tel-00740409, version 1

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UGA | CNRS | UJF | G2ELAB

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Hervé Chazal. Caractérisations physicochimique et magnétique de rubans nanocristallins à haute perméabilité et étude de leur intégration en électronique de puissance. Energie électrique. Université Joseph-Fourier - Grenoble I, 2004. Français. ⟨tel-00740409⟩

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