Rotor construction in an asynchronous electric machine.

摘要

The rotor construction (2) comprises substantially adjacent to the stator (1) of the asynchronous electric machine an electrically conductive conductor construction (6) associated with a rotor shaft (4). A coating layer (7) consisting of ferromagnetic particulate matter of an electric conductivity lower than that of the conductor construction is placed on the surface of the rotor shaft (4). The coating layer (7) comprises an electrically insulating coating on the surface of a part of the ferromagnetic matter. The conductor construction (6) is substantially associated with the coating layer (7). Further there is an intermediate layer (9), having a lower yield point than that of the coating layer (7) between the coating layer and the shaft (2). <IMAGE>