L2EP Logo


Recherche, Développement et Innovation en Génie Electrique

Séminaire: C. Espanet

E2SD Master Unit
« Sustainable Development Applications »

Le professeur Christophe Espanet de l’université de Franche-Comté (France) et de Sonceboz Group (Suisse), donnera un séminaire le lundi 12 décembre 2016 de 16h30 à 17h45, dans la salle 216 du bâtiment P2, Cité Scientifique, Villeneuve d’Ascq.

Sustainable development and high speed motors for automotive applications


The increase of the rotating speed is a way to reduce the volume and the weight of electric machines, or, for the same volume, to increase the efficiency. Indeed, the rotating speed increase is generally linked to an increase of the energy conversion frequency, leading to a reduction of the active part volume and weight. The increase of rotating speed is also mandatory in several applications such as kinetic energy storage, air compressor for fuel-cell, air-compressor for e-charger, waste heat recovery…
In this context, this presentation will be divided in two parts. A first one will address the key issues of high speed electric machines: magnetic losses, bearings, power electronic, acoustic noise… In a second part, we will focus on the automotive applications of air compression, such as electric superchargers for thermal engine. Experiences of Sonceboz Group in collaboration with the University of Franche-Comte will be detailed to highlight the interest of such applications.

About the speaker:

espanetChristophe Espanet is currently Professor at the University of Franche-Comté, Belfort, France and, at the same time, Scientific Director of SONCEBOZ Group. He received the Ph.D. degree from the University of Franche-Comte (France) in 1999. His doctoral research dealt with the design and the optimization of PM in-wheel motors. From 1999 to 2007, he was an Associate Professor at the University of Franche-Comte in the Laboratory of Electrical Engineering and Systems (L2ES). He is now a Full Professor at the University of Franche-Comte. Finally, since 2014, he is also Scientific Director of SONCEBOZ Group (half time). His research interests include the modelling and the design of electrical systems and in particular electric machines. He has been Technical Chair of IEEE VPPC (Vehicle Power Propulsion Conference) in 2010 (Lille, France) and in 2014 (Coimbra, Portugal). From 2012 to 2014, he was appointed Associate Editor of IEEE transactions on Industry Applications.