Thermische Integration von elektrischen Hochdrehzahlmaschinen in EDUs

Autoren

M. Schröder, K. Herold, C. Monissen, A. Krings, G. Hellenbroich, J. Brächter, F. Klute, T. Flecke, I. Steinberg - FEV Europe GmbH

Zusammenfassung

Electric drive units (EDUs) consist of three main parts, which are inverter, electric machine and gear-set. Current research and development activities in the field of electric vehicle propulsion have a strong focus on increasing the efficiency and/or the power density. This is primarily driven by the need to reduce battery costs and meet customer expectations for improved driving range.

The electric machine is the main loss contributor in EDUs. Optimization of the electric machine's efficiency is a key for increasing the driving range of electric vehicles. Although there is a growing share of electric machines without permanent magnets visible, still a great share of new electric vehicles is equipped with permanent magnet synchronous machines (PMSMs). This is due to the high efficiency in a wide operating area, as well as the highest power density in comparison to other machine topologies like induction machines or externally excited synchronous machines. However, it is observable that the rare earth content of the used permanent magnets, is tried to be reduced or minimized.

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