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Enfouissement d’une alimentation isolée sous contraintes de température et d’isolation

Abstract : High temperature applications such as deep drilling, aeronautics or aerospace, lead to rework the isolated power supplies used for the control of the power elements. This work study the feasibility of an embedded converter with high static (10kV) and dynamic (<10 pF) insulation, able to work under high temperatures (> 250 ° C), in the ranges of dozens volts for the output voltage and several Watt of transmitted power. To avoid being constrained by a magnetic material Curie temperature of, we use a coreless transformer based DC/DC power supply. First of all, this thesis details the origin, the measurement and the estimation of the elements of the chosen transformer electric model. Then, to maximize the transferred power, we form a resonant structure by adding capacitors in parallel or in series with the transformer, then we develop a method to tune the whole. The comparison between the topologies leads us to choose a serial-serial compensation. Then we note that the technology chosen for capacitors, the static and dynamic insulation constraint can divide by more than two the power transmitted through a surface. Finally, we discuss how to rectify and regulate the output voltage without affecting the resonance or insulation provided, while minimizing the losses generated. A last part exhibit that with a suitable dissipation system and manufacturing process, it is possible to integrate the complete structure on silicon chips
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Submitted on : Friday, May 10, 2019 - 12:15:08 PM
Last modification on : Monday, September 13, 2021 - 2:44:04 PM
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  • HAL Id : tel-02125282, version 1


Yohan Wanderoild-Morand. Enfouissement d’une alimentation isolée sous contraintes de température et d’isolation. Electronique. Université de Lyon, 2018. Français. ⟨NNT : 2018LYSE1193⟩. ⟨tel-02125282⟩



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