Patent ID: 8963394
Filing Date: 2015-02-24
Classification: B22D,H02K

Abstract:
1. A cage rotor for an asynchronous machine, said cage rotor comprising: a laminated rotor core having grooves; and operating bars arranged in the grooves and resting directly on the laminated rotor core at an inner groove base, as seen in a radial direction of the cage rotor, wherein each of the operating bars has a partial sheathing which sheathes only an outer part of the operating bar as seen in the radial direction of the cage rotor to thereby increase a height of the operating bar so that the operating bar extends farther in a direction of a rotor diameter outwards into the groove, wherein the partial sheathing is cast from a metal melt, and a material of said operating bar has a specific conductivity value which is higher than a specific conductivity value of a material of the partial sheathing cast from the metal melt.