Eagle Power Technologies was created to develop the next generation of motors. Superconductors have no electrical resistance and therefore, greater efficiency. This efficiency is garnered by a very high magnetic field that is not possible in a conventional machine. Thus, the generator can be made smaller with a far greater power density. However, the slip rings and brushes in a conventional generator are wear items and can limit the electricity generated.
Eagle Power has a plan. New technology fresh from NCSU is available.