Dynamo-electric flywheel energy store - has rotor shaft with desired point of fracture which lies outside rotor bearings

摘要

The flywheel energy store is arranged in an evacuated housing and includes a flywheel rotor. Permanent magnets are fixed to the rotor concentrically to a symmetric axis. A stator is concentric within the rotor to the symmetric axis on a rotor shaft. Windings are positioned opposite the permanent magnets according to whether the electric dynamo flywheel store is to be driven as a motor or as a generator. The rotor shaft (32) has a desired point of fracture (57) which lies outside the bearings (29,30,33,34,59,60) of the rotor (3). ADVANTAGE - Is safer with respect to damage due to e.g. corrosion of rotor bearings.