The rear engine
This is the primary motor of the e-tron and is slightly more powerful than the one at the front axle with 140kW and 314Nm of power and torque respectively. Again this can be boosted for 8 seconds to 165kW and 355Nm of max power and torque. Because of space constraints this motor is mounted coaxially on the rear axle.
Both the front and rear motor is supplied and controlled by its own power electronics module, which works together closely and extremely dynamically with the drive control unit. The power electronics modules read sensor data 10,000 times per second and the output current values for the electric motors. These two identical power electronics modules are positioned on the electric motors and are integrated into the thermal management system of the drive system. They take up little space, and each weighs only 8kg. One of the module’s main jobs is to convert the direct current from the battery into three-phase current. When the electric motor operates as a generator during recuperation, it converts the generated three-phase current into direct current and feeds it back to the battery.
Subframe/ rubber mount • Subframeame connection to body • First decoupling level Encapsulation of electric motor • Open pore PU foam & absorption ofmotor noise Motor mount / rubber mount • Motor connection to thesubframe • Second decoupling level Motor support madefrom aluminium