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Modélisation électronique et électromagnétique d'un transformateur haute fréquence à circuit magnétique en fonte

Abstract : This report begins by a digest concerning the représentation by équivalent circuits and the expérimental characterization of wound electronic components. Then, focus is on low power efliciency and/or weak coupling transformer : équivalent circuits and expérimental characterization are adapted to such components. As a second step, équivalent circuit of the component under test is experimentally established. Thanks to PSPICE software, the simuiated behavior of the electronic circuit in which this component is used, is compared to measurements. The benefit that results from the use of an appropriate model for each wound component is highlighted. Subsequently, we pay attention to the calculation of the transformer équivalent circuit éléments from technological data. First, focus is on stray capacitances. Thanks to both an analytical study and an electrostatic simulation, carried out with FLUX2D software, the way the winding mode influences stray capacitance values is carefully analyzed. Practical winding rules, intended to decrease thèse capacitances, are justified and successfully applied to industrial prototypes. Magnetic core simulation is worked out, thanks to FLUX2D software. Loss calculation require the introduction of a complex penneabiiity. Then, some validity limits of standard characterization methods are discussed. Finally, an original expérimental method, intended to measure, at each frequency, resistivity and complex permeability of a Hnear conductive magnetic material, is proposed and validated. This method is then extended to composite materials (ferrite).
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https://tel.archives-ouvertes.fr/tel-00599667
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Submitted on : Friday, June 10, 2011 - 3:21:03 PM
Last modification on : Thursday, November 19, 2020 - 1:00:29 PM
Long-term archiving on: : Sunday, September 11, 2011 - 2:25:08 AM

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  • HAL Id : tel-00599667, version 1

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François Blache. Modélisation électronique et électromagnétique d'un transformateur haute fréquence à circuit magnétique en fonte. Sciences de l'ingénieur [physics]. Institut National Polytechnique de Grenoble - INPG, 1995. Français. ⟨tel-00599667⟩

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