Schaeffler to Unveil Efficient Electric Powertrain at IAA Mobility
The automotive and industrial supplier Schaeffler is presenting innovative components and systems at the IAA Mobility 2021 under the motto “On Track to Sustainable Mobility”: In addition to efficient bearing and damper solutions for hybrid transmissions, the company is presenting new releases in the form of an 800-volt power electronics system and a highly integrated thermal management system.
As a new release, Schaeffler is presenting an in-house 800-volt power electronics system for electric axle applications in high-performance vehicles. The scalable solution enables continuous outputs of up to 330 kW and short-term peak outputs of up to 500 kW. The achievable power density of up to 70 kW per liter denotes small housing dimensions and consequently advantages in integration. Power electronics make a decisive contribution, alongside the motor, to powertrain efficiency. Schaeffler has opted to use the latest silicon carbide wide bandgap technology in the 800-volt on-board power supply, which will significantly reduce power losses compared with conventional silicon IGBT technology and enable efficiencies of over 99 percent in defined load ranges. As a result, the overall range of electric vehicles will be noticeably increased. Furthermore, the charging speeds achievable with the 800-volt voltage class are considerably higher than those achieved with the 400-volt voltage class that has been widely used to date. An in-house motor control solution is also used, which enables various modulation processes and variable switching frequencies.
At the IAA, Schaeffler will use its 3-in-1 electric axle, which combines the electric motor, transmission, and power electronics in one system, to demonstrate how performance electronics blend into the overall system. Signal processing and control of the drive is performed by proprietary Schaeffler software. Featuring a transmission with excellent torque density, the performance electric axle from Schaeffler makes a convincing case and is characterized, above all, by its compact dimensions, high performance density, high system efficiency, and excellent acoustic behavior. Thanks to a modular structure, the system can meet different usage requirements and can be used for various vehicle platforms.