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With a generator integrated into the housing cover of the axlebox bearing, Schaeffler will be presenting a self-sufficient power supply system for freight cars at the 2016 InnoTrans. The generator produces around 200 watts that is available for supplying electricity, thus enabling additional functions.
Freight cars usually do not have any electrical equipment. However, state-of-the-art functions such as GPS or condition monitoring systems require electrification. But where is the electricity supposed to come from? With the axlebox generator, Schaeffler is presenting a self-sufficient power supply system that is flanged onto the axlebox and can be used as an alternative to power supply via the locomotive. The permanent magnet rotor is mounted on the end face of the axlebox axle and integrated into the housing cover of the disc motor generator. The wear-free generator supplies electric energy in a wide range of speeds from 35 to 180 km/h. At a speed of 100 km/h, the generator produces 90 W, and at 150 km/h it is already 200 W. The system can be added to freight cars already in use. The electrical system also includes a controller, consisting of a voltage regulator and rectifier, and a battery. The design of an axlebox generator for even higher output of up to 1,000 W is basically possible.
The axlebox generator enables a self-sufficient and highly reliable power supply for a wide range of functions, such as GPS, condition monitoring, lighting, brake assistant and activation of hinged doors on hopper cars. The project has attracted a lot of interest internationally. There are already plans for initial driving tests as part of a specific customer project with a customer.
