PhD Student in Materials and Applications

SL-DRT-19-0630

RESEARCH FIELD

Materials and applications

ABSTRACT

In just a few years, power electronics has become an essential technology that has spread throughout the world of electrical engineering. By 2030, nearly 80% of the electrical energy should pass through a stage controlled by power electronics. The current challenge of the developments is focused on increasing switching frequencies to improve converter efficiencies. Operating frequencies can now reach values above MHz and energy densities targeted will be 5 to 10 times larger than those of silicon-based components. Important issues exist since the analysis of a full converter shows that the non-optimized performance of passive components operating at very high switching velocities constitutes a so-called critical barrier. Significant efforts are required to develop passive magnetic components whose efficiency (low losses), high working switching frequency and sizing control (downscaling and thermal management) are optimized. Stereolithography (SLA) appears to be an interesting additive manufacturing technique to overcome the dimensional issues discussed here. This technology offers the possibility of designing complex parts. The main SLA bottleneck for ferrite concerns the interaction between “UV light and charged resin”. Ferrite absorbs UV radiation and inhibits the photopolymerization reaction at high charge rate (>45%vol) that is the charge rate necessary to obtain a dense sintered material. A functionalization of the ferrite becomes necessary to obtain a crosslinkable resin.

LOCATION

Département des Technologies des NanoMatériaux (LITEN)

Laboratoire Matériaux Avancés et mise en forme

Grenoble

CONTACT PERSON

SOUPREMANIEN Ulrich

CEA

DRT/DTNM//LMA

CEA/LITEN/DTNM/SA3D/LMCM, 17 Rue des Martyrs, 38054 Grenoble Cedex 9

Phone number: 0438783151

Email: ulrich.soupremanien@cea.fr

START DATE

Start date on 01-10-2019

THESIS SUPERVISOR

BELLEVILLE Philippe

CEA

DAM/DMAT/SR2C/

CEA/Le RipaultBP 1637260 Monts

Phone number: 02 47 34 40 00

Email: philippe.belleville@cea.fr

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