Highlights 2022

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This power module is made from sintered silver, ceramic plates and 1200V SiC power components. The innovative aspects include the use of sintered silver for the fabrication of power tracks, and its double-sided architecture with direct cooling on the ceramic substrates.
Involved persons: Nicolas Botter, Yvan Avenas, Jean-Michel Missiaen (SIMAP), Didier Bouvard (SIMAP) and Rabih Khazaka (SAFRAN TECH).

G2Elab, in collaboration with the social and solidarity company Nanoé, deployed a DC micro-grid with decentralized production and storage in Ambohimena, a rural village in northern Madagascar. A bidirectional DC-DC converter was developed in the laboratory in order to control power exchanges and ensure the effective operation of the microgrid.
Involved persons: This work, realized in collaboration between Nanoé and G2Elab involved Lucas RICHARD (PhD candidate), Marie-Cécile ALVAREZ (MCF-GINP), David FREY (MCF-UGA) and Bertrand RAISON (PU UGA)

In this PhD, focus was made on identifying the optimal conditions to develop circularity of componants and subparts of power converters in the perspective of reuse scenario. The indicator of residual value has been developed based on digital twins to follow the mission profile followed by the converter with a specific focus on power converter arrays. This research work was part of ANR project VIVAE.
Involved persons: Boubackr Rahmani, Maud Rio (G-SCOP), Yves Lembeye et Jean Christophe Crébier.

Design and characterization of the first PCA (Power Converter Array) without need of common mode current (CMC) filter. It is based on the well known CMC cancellation. This time the internal current recycling is applied at the level of a multi-cell converter, physically organized and controlled in an original way to reduce needs of conducted EMI filtering.  
Involved persons: Glauber de Freitas Lima, Fabien Ngadigimana, Yves Lembeye et Jean Christophe Crébier

A nanoporous copper deposit is electrochemically made on a copper substrate. A copper foam acting as a heat sink is then thermocompressed onto this deposit (applying a pressure of 8 MPa, at 300°C, for 30 minutes). This eliminates the need for soldering, a regular source of failure in power electronics assemblies.
Involved persons: Goulven Janod, Lucas Chachay (SIMAP), Jonathan Schoenleber (UTINAM) , Yvan Avenas, Didier Bouvard (SIMAP), Rémi Daudain (SIMAP), Jean-Michel Missiaen (SIMAP), Marie-Pierre Gigandet (UTINAM), Jean-Yves Hihn (UTINAM), Rabih Khazaka (SAFRAN)

A test bench was developed to characterize two-phase immersion cooling of modular power converters.
Involved persons: Clément Hugon, Sébastien Flury, Yvan Avenas, Samuel Siedel (SIMAP)