Oerlikon Graziano is attending the EVS30 congress in Stuttgart, from October 9-11, 2017.
The congress is one of the most important at the European level dedicated to EV technologies. Following the motto "Industrialization and market - the sustainable path to electromobility", the conference will highlight the latest research projects, technological advances, market development strategies and innovative business models for electromobility concepts.
Oerlikon Graziano will present a technical speech on October 9 under the session Electric Powertrains, innovations and developments, about its latest multispeed transmissions for electric drives, 2SED and 4SED.
The original assumption for electric vehicles and electric drivelines was to use a single-speed transmission, relying on the torque spread of the electric motor to provide adequate performance under all operating conditions. Though simple to execute, this arrangement cannot achieve the best vehicle efficiency because, for much of the time, the traction motor is operating at loads and speeds that do not yield optimum efficiency. The Oerlikon Graziano paper will show how an increase in transmission technology can reduce energy consumption and improve performance, and describe two multi-speed concepts which can even maintain or indeed reduce the overall electric powertrain cost and weight.
