BEV Range Increase by Optimal Combination of 800 V E-Machine and Multispeed Transmission

To cope with increasing customer demands on vehicle range and efficiency, Valeo and Valeo Siemens eAutomotive Germany develop electrical drives from the beginning as a fully integrated system. This work presents the newest seamless multispeed and 800 V eAxle designed for SUV premium class vehicles. The paper depicts the architecture and technical advantages of the 250 kW eAxle system combining a multispeed transmission with an 800 V electrical permanent magnet machine and a SiC Inverter. Advantages in efficiency and resulting range increase on the WLTC cycle are highlighted. Throughout the work, a comparison with a single speed transmission and a 400 V round wire machine illustrates decisive factors and key enablers of the newly developed eAxle.