The motion control by electrical drives affects all areas of life. Often, this happens unnoticeably and automatically and is taken for granted by the users. Variable speed drives are state of the art even for home appliances. More sophisticated drives can be found in elevators, paper and steel mills, or rail vehicles, to name just a few examples. In total, 65% of the electric energy produced in Germany is used by electrical drives in the end. Furthermore, electrical drives become more and more important in mobile systems such as ships and road vehicles. It seems that the time is even ripe for pure electric vehicles.