Système thermoélectrique pour la récupération d'énergie : modélisation électrique et continuité de service de la circuiterie électronique

Abstract : Thermal energy harevsting based on thermoelectric generators is used in many applications such as self-powered medical devices. The reliability and continuity of service of these systems are now major concerns. Furthermore, any failure in the controllable switch of the electronic interface circuitry can cause serious system malfunctions. Any undetected and uncompensated fault can endanger the entire system and interrupt the power supply to the load. Therefore, the implementation of an efficient and rapid fault compensation is imperative in order to ensure the continuity of service. In this research, we study the continuity of service of an electronic interface for TEG, based on a two-stage conversion cascaded Buck/Buck-Boost. A generic electrical modeling of the TEG model under different operating conditions and with taking into account all the thermal contact resistances is first presented. Next, an open-circuit fault compensation method of the controllable switch of one of the two DC-DC converters is also proposed. We present an original fault-tolerant DC-DC converter topology with no conventional hardware redundancy. This topology ensures the continuity of service of the energy recovery system in nominal mode. Theoretical studies were validated by simulation and experimental tests
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Saïma Siouane. Système thermoélectrique pour la récupération d'énergie : modélisation électrique et continuité de service de la circuiterie électronique. Micro et nanotechnologies/Microélectronique. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0201⟩. ⟨tel-01906188⟩

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