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Caractérisation et modélisation des pertes magnétiques d'une machine asynchrone fonctionnant en charge

Abstract : The significant consumption of the world's energy supplies as well as the current awareness of ecological problems leads the manufacturers to increase the efficiency of electromechanical systems. The study undertaken in this report concerns the calculation of magnetic losses in electrical machines. Magnetic losses are not well known although they represent an important part of the power balance. With this intention, we cleverly instrumented an induction machine both magnetically and thermally. This enabled us to locate and study the evolution of flux densities inside the machine, for different operating conditions. For this purpose, a test bench enabling us to act on various parameters (voltage, frequency, torque) was set up. At the same time, a refined numerical modeling of the system is carried out with the finite element Flux2D software. It integrates electric and mechanical phenomena: voltage supply, squirrel-cage, end effects, conductor temperature, rotor motion. The magnetic distribution obtained is then compared to (and validated by) the instrumentation results. A model of dynamic hysteresis calculation, based on the knowledge of induction and of its time derivative, is then applied to each element of the grid. This model, developed in collaboration with the GIRTOM and CEDRAT company, allows a faithful representation of the static and dynamic magnetic phenomena of the sheets. Validated with simple geometries under various wave forms, it is here applied to the complex case of a rotating machine. The results obtained, with and without load, confirm its performances with respect to the models currently used in industry.
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https://tel.archives-ouvertes.fr/tel-00408127
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Submitted on : Wednesday, July 29, 2009 - 9:06:07 AM
Last modification on : Thursday, November 19, 2020 - 1:00:06 PM
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  • HAL Id : tel-00408127, version 1

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Alban Marino. Caractérisation et modélisation des pertes magnétiques d'une machine asynchrone fonctionnant en charge. Sciences de l'ingénieur [physics]. Institut National Polytechnique de Grenoble - INPG, 2003. Français. ⟨tel-00408127⟩

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