Electrical drive

Compared to internal combustion engines, electrical machines have the significant advantage that they can deliver their maximum torque from standstill and thus, an almost constant acceleration until nominal rotational speed can be achieved. This implies that at low speeds, which account for the biggest part in urban driving, a very dynamic handling can be experienced.

Furthermore, emissions play a major role concerning inner-city traffic. By using an electrical drive local emissions can be largely avoided (CO2, particulate matter) and the traffic-based noise pollution can be reduced significantly.

In the Visio.M project an asynchronous machine (ASM), which has exclusively been developed for this project, drives the vehicle. The ASM is characterized by a great robustness, durability and a high efficiency of cost. Additionally, the ASM features a high efficiency, especially when the design correlates with the driving cycleat high rotational speeds.

The electrical machine can be operated asdrive or generator. This means that at deceleration the kinetic energy of the vehicle can be converted to electrical energy and the battery can be recharged to increase the range of the vehicle (recuperation).

The cooling of the ASM is on the one hand ensured by a water-cooled body, on the other hand by an internal air cooling mounted on the rotor. This provides an optimal heat transport and therefore a maximum utilization of the installation space.