Patent ID: 7919895

Claim:
An asynchronous machine, comprising: a stator; and a squirrel-cage rotor having a shaft, a laminate stack mounted on the shaft and having an axial end, a solid end plate positioned on the axial end of the laminate stack, a rotor bar located in the laminate stack and having a thickened portion of enlarged cross section received in an opening of the end plate at a distance to a laminate-stack distal end surface of the end plate, and a short-circuiting ring disposed in spaced-apart relation to the shaft and in electric conductive connection with the thickened portion of the rotor bar within the opening of the end plate, said short-circuiting ring being supported by a peripheral projection of the end plate said peripheral projection of the end plate at least partially embracing the short-circuiting ring in a formfitting manner, wherein the end plate is made of a material having a strength which is higher than a strength of the rotor bar and the short-circuiting ring, and wherein a transition between the thickened portion of the rotor bar and the short-circuiting ring is in the form of a rounded portion with a transition radius.