High-speed concepts are increasingly being used for in electrified powertrains, which contribute to a weight reduction by employing very high power densities. As a result of the high input speeds, new challenges arise in terms of efficiency, load-carrying capacity and NVH behaviour, which are under the leadership of the Gear Research Centre (FZG) of the Technical University (TU) of Munich being investigated within the scope of the Speed2E joint research project. The project results will support the developers of BEV-powertrains meeting these challenges.
INTRODUCTION
A high-speed, electrically driven powertrain with input speeds of up to 30,000 rpm has been developed as part of the Speed2E joint research project, which is sponsored by the Federal Ministry for Economic Affairs and Energy (BMWi) and supported by the Power Transmission Engineering Association (FVA). Alongside the consortium leader FZG a number of institutes at the Technical University of Darmstadt and the Leibniz University Hannover, as well as Magna subsidiary Getrag GmbH & Cie KG and Lenze SE are partners in this project. A novel powertrain layout has been developed in context of the Speed2E project, based on two electric machines and one transmission with two parallel sub-transmissions, of which one is shiftable [1, 2]. The topology of the prototype has been intentionally designed with a high functionality to provide comprehensive testing capabilities in terms of efficiency, lubrication and vibration behaviour at high operating speeds. Passing the final phase of the three-year project, experimental investigations are currently being conducted on FZG’s universal test rig.
POWERTRAIN CONCEPT
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