When an efficient air compressor impeller is matched to the Rotrex traction drive, overall adiabatic compression efficiency (combined mechanical and isentropic processes) can exceed 70% and even higher values have been achieved on a regular basis, even for the smallest trims.

The combination of superior efficiency and near-zero air contamination means that the Rotrex traction drive compressor lends itself perfectly to the strict requirements for fuel cell air supply, an application for which another advocate is the extremely low NVH levels emitted by the patented Rotrex traction drive, which operates at an average mechanical efficiency of approximately 98%. 

Rotrex is currently developing a new integrated product specifically targeting the electric drive and control of the Rotrex traction drive supercharger, the Rotrex E-Charger.
 
Furthermore, Rotrex is developing an ultra compact next-gen air compressor, the Rotrex C8, scheduled for launch in 2010. The C8 will be specifically intended for large scale manufacturing for hybrid and fuel cell applications, where efficient air compression at pressure ratios above 1.5 (boost levels above 0.5 bar) is required, and where conformation to tight space constraints, high efficiency levels and cost efficiency is of paramount importance.