Siemens Aktiengesellschaft

Jens Kurth

Klaus Büttner

Norbert Wöhner

Michael Müller

The invention relates to a squirrel-cage rotor for an asynchronous machine. In order to increase the electrical efficiency for a cage rotor composed of two materials, the cage rotor comprises a rotor core () having grooves (), end rings () of a first material that are cast onto the rotor core on the end face, and conductors () that are arranged in the grooves and that are made of a second material that has an electric conductivity that is higher than the electric conductivity of the first material, wherein the conductors () comprise a coating () made of a coating material on the surface of the conductors, wherein the coating adjoins the second material of the conductors () by means of a first alloy layer () made of the second material and the coating material and adjoins the cast first material by means of a second alloy layer (); made of the first material and the coating material.

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Unsleben, Germany

Jens Kurth