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eDrive

The Schaeffler eDrive Platform

Modular and Highly Integrated

I. Introduction

Figure 1 Powertrain concepts with an integrated electric drive

II. Modular Approach

Figure 2 Modular technology platform for electric drives

III. Platform Components

Figure 3 Application areas of concentrated and distributed winding, depending on the active length of the electric motor

Figure 4 Application areas of concentrated and distributed winding, depending on the active length of the electric motor

Figure 5 Calculated level of efficiency in an electric motor with wave winding for various operating points

Figure 6 Comparison of the stator and rotor losses for the electric motor in an electric axle application with wave and hairpin winding

Figure 7 Comparison of the stator and rotor temperatures at two operating points in an electric motor with wave and hairpin winding

Figure 8 Modular concept for power electronics, taking a hybrid module as an example

Figure 9 Power scaling through the size and number of IGTB semiconductors and the number of phases in the electric motor

Figure 10 Power electronics setup for an electric axle drive

Figure 11 Integration of the power electronics in a P2 hybrid module at the 48-volt level

Figure 12 Software architecture

Figure 13 Vibration reduction in a wheel-hub drive through targeted torque variation in the e-machine

Figure 14 Propagation of torque generation inaccuracies in a typical e-machine

VI. Summary and Outlook

Figure 15 Comparison of electric axle drives from 2011 and 2017

The digital version of the Schaeffler Symposium 2018 “Mobility for Tomorrow” conference transcript