Vitesco Technologies develops new rotor without permanent magnets which works without rare earth minerals

Vitesco Technologies, an international supplier of modern drive technologies and electrification solutions, has developed a fully integrated electric axle drive platform (EMR4, Electronics Motor Reducer, which is being broadened by a new option to enable an even better life cycle assessment. This is the new rotor without permanent magnets that is now part of the platform development. 

The rotor forms the core of an externally excited synchronous machine (EESM), which works without rare earth minerals. This reduces the rotor costs, and it avoids the carbon footprint that comes with mining and processing the ores.

The company is exhibiting innovations for more sustainable and more efficient electric driving at the 44th Vienna Motor Symposium (April 27-28, 2023).

“Top results in the sustainability and efficiency of electric cars will be achieved, if the vehicle drive is optimally adjusted to the specific scenario. The externally excited rotor without permanent magnets is a particularly sustainable option for our customers. The higher the performance requirements to the drive, the more economically attractive EESM technology becomes,” said Thomas Stierle, division head of Vitesco Technologies’ Electrification Solutions.

 By applying a sophisticated winding principle, the innovative EESM rotor becomes an economically attractive option within the most recent drive platform. Especially, when high-performance requirements necessitate a big magnet mass in a PSM, EESM machines will be more affordable and more sustainable.