Freight cars usually do not have any electrical equipment. However, state-of-the-art functions such as GPS or condition monitoring systems require electrification—usually supplied by the locomotive.

With the axlebox generator, Schaeffler is presenting a self-sufficient power supply system that 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.

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. Click to enlarge.

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 theoretically 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 interest internationally, the company says. There are already plans for initial driving tests as part of a specific customer project with a customer.