Distributed Drive Technology

Audi e-tron

The structural characteristics of the central double electric mechanism type are similar to the centralized motor drive configuration, and the two drive motors and two reducers are arranged on the frame in opposition, and are connected to the wheels through a long half-shaft to drive the wheels on both sides independently. Its unsprung mass is small, the manufacturing technology is mature, and the application and installation are convenient, but the transmission system still needs universal joints and transmission half shafts, and occupies a certain amount of chassis space, resulting in limited interior design space, generally used in high-performance cars or trucks.


A typical application is the Audi R8 e-tron drive system, where the maximum speed of two permanent magnet synchronous motors exceeds 12,500 rpm, corresponding to a vehicle speed of more than 250 km/h. The motor drive housing integrates a single row of planetary gears as a reduction mechanism, the torque of a single motor 410Nm is amplified by the planetary gear set with a transmission ratio of 6:1 6 times, and the advantage of independent drive of the left and right wheels is that the speed difference between the wheels, the power distribution can be adjusted arbitrarily, through the reasonable distribution of torque, it can assist the steering of the vehicle, which is much larger than the torque distribution adjustment range between the wheels on the traditional vehicle, as long as the control program is perfect enough, Then the sporty character of the car will be far superior to that of a conventionally powered rear-drive car.


Post time: Sep-11-2023