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Modélisation multi-physique d'un système électrique de puissance embarqué pour la simulation, le prototypage numérique et la commande

Abstract : The quality of the electrical energy supplied in aeronautical systems depends on the complexity of the electrical system used. The two quantities (voltage, current) generally suer from a lot of disturbances due to the impedance of the electric grid and circulation of the perturbations non-linear loads variation. In the on-board grid of an helicopter, the proliferation of electrical disturbances can lead to malfunctions, degradations and overheating of the devices. The Power Factor Correction (PFC) is designed to avoid unwanted eects, harmonics and disturbances. This type of system, consisting of an AC / DC converter connected to another DC / DC converter, uses high frequency components and switches. The choice of Silicon Carbide MOSFETs (SiC MOSFETs) ensures a good quality of energy and reduces the power-to-weight ratio for embedded systems. The contribution of this work is the multiphysical modeling of power SiC MOSFET component which is proposed to simulate and design a global control for dierent electrical power converters. We propose a more precise electro-thermal nonlinear model for SiC MOSFETs. This model takes into account electrothermal couplings and will make controls more robust. It has been validated by the comparing simulation to the characteristics of the datasheet. To implement and validate the proposed models and perform the prototyping of AC-DC and DC-DC converters, we used Psim, PSpice and Saber softwares. This work was carried out in an FUI project for the design of reliable embedded power sources in helicopters system.
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Submitted on : Monday, February 17, 2020 - 5:10:08 PM
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Khaled Frifita. Modélisation multi-physique d'un système électrique de puissance embarqué pour la simulation, le prototypage numérique et la commande. Automatique / Robotique. AMU - Aix Marseille Université, 2019. Français. ⟨tel-02481926⟩

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