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Modèles de composants passifs et couplage électromagnétique pour filtres HF de puissance : optimisation du placement

Abstract : EMC filters are widely used in power electronic systems for electromagnetic interference suppression. They usually consist of a series of capacitors and inductors. At high frequencies, it is necessary to complete the model of component with parasitic elements. This work is devoted to the study of the influence of inter-component coupling on the performance of the EMC filter. A mathematical study was performed on an LC filter in type Γ. The latter allowed us to deduce a better behavior of the filter can be obtained when the magnetic coupling inter-component cancels the parasitic inductance of the capacitor (ESL = M). To achieve this goal, a methodology to optimize the locations of components has been developed based on their 3D models simplified. In this thesis, a metalized film capacitor is presented by a 3D model constituting a single volume conductor. The inductor with ferrite is modeled by taking into account the physical and geometrical properties. These models of capacitors and inductors have been studied in several configurations for different positions of the components. The results have shown their ability to predict both the intrinsic parameters (parasitic inductance ESL for the capacitor, inductance L for the inductor) and mutual inductance M inter-components. Finally, the optimization method was validated experimentally with an EMC filter type Γ (film capacitor and ferrite-rod inductor) built in a wiper motor
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An Zhou. Modèles de composants passifs et couplage électromagnétique pour filtres HF de puissance : optimisation du placement. Energie électrique. Université Claude Bernard - Lyon I, 2013. Français. ⟨NNT : 2013LYO10032⟩. ⟨tel-01176346⟩

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