Rotor construction in an asynchronous electric machine

摘要

A rotor in an asynchronous electrical machine used in high speed applications, comprises an electrically conductive conductor surrounding a rotor shaft and located substantially adjacent to a stator of the asynchronous electrical machine, a coating layer made of a ferromagnetic particulate material having an electric conductivity substantially lower than that of the conductor, the coating layer being placed between the rotor shaft and the conductor and a metallic intermediate layer between the coating layer and rotor shaft, the metallic intermediate layer having yield point lower than that of the coating layer and the rotor shaft.