Radio based control of a linear motor for the NBP railway system

In the course of the NBP (Neue Bahntechnik Paderborn) project a testing plant is used for investigations on autonomous railway vehicles (shuttles) driven by linear motors. At the testing plant the linear motors are of the doubly-fed long-stator type which is used to transfer energy to the shuttles. In accordance with the two parts of the linear motor being distributed to the vehicles and the track the drive control hardware consists of different units which are distributed to stationary plants and moving shuttles. Communication between these control units cannot be performed but by radio transmission which is a demanding task because strong realtime requirements of drive control must be fulfilled.