Scientific direction Development of key enabling technologies
Transfer of knowledge to industry

PhD : selection by topics

Technological challenges >> Energy efficiency for smart buildings, electrical mobility and industrial processes
2 proposition(s).

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DC/DC converter based on piezoelectric material

Département Systèmes (LETI)

Laboratoire Electronique Energie et Puissance

01-10-2020

SL-DRT-21-0277

ghislain.despesse@cea.fr

Energy efficiency for smart buildings, electrical mobility and industrial processes (.pdf)

The aim of this thesis is to design high-efficiency power converters based on resonating piezoelectric transducers. A large part of the work is to develop the electrical cycle able to energetically maintain the piezoelectric resonator in resonance and ensure zero-voltage switching, for electrical energy transfer from the source to the piezoelectric resonator or from the piezoelectric resonator to the output, in order to minimize the losses. An electronic power management circuit will be designed to enable this ideal energetic cycle. This electronic circuit will include several regulation loops to ensure the system stability and regulate the electrical output power. Finally, a study of the piezoelectric transducer size reduction will be done in view of a MEMS (Micro Electro Mechanical System) integration.

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High-effiency power hub for energy transition

Département Systèmes (LETI)

Laboratoire Electronique Energie et Puissance

01-10-2021

SL-DRT-21-0609

sebastien.carcouet@cea.fr

Energy efficiency for smart buildings, electrical mobility and industrial processes (.pdf)

This subject addresses the scientific developments needed to design a power hub allowing, in a single stage of power electronics, to manage all the household energy flows: photovoltaic supply (...) , storage including the battery of electric vehicles (V2G), connection to the network (smart grid), etc. Previous works at CEA have already dealt with advanced high-efficiency high-frequency converter topologies, in particular using GaN components. We propose to go further, by studying the coupling of various energy sources and receivers using a single-stage converter. The design of the converter and control policies will be carried out using a Model Based Design approach, involving numerical simulation and design tools in the same integrated development environment. The study will end with the implementation of control laws on a prototype elaborated in the laboratory.

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