Patent ID: 6933647

Claim:
A squirrel-cage rotor for an asynchronous induction motor of greater power, comprising a rotor core made of massive steel and formed integrally with a rotor shaft, said rotor core having a surface formed with slots extending in axial direction and having parallel or substantially parallel slot walls; and conductor bars disposed in and soldered along their entire length into the slots in one-to-one correspondence such as to extend flush with the surface of the rotor core, wherein each of the conductor bars has a cross section conforming to a cross section of the corresponding slot and having opposite axial ends; and a short-circuit assembly having two short-circuit rings, one short-circuit ring short-circuiting the one of the opposite axial ends of the conductor bars, and the other short-circuit ring short-circuiting the other one of the opposite axial ends of the conductor bars by a material-interconnecting fit, wherein the rotor core has opposite ends, each said end of the rotor core and each said end of the conductor bars being conically tapered so that adjacent ends of the rotor core and the conductor bars define opposite tapered regions, wherein the short-circuit rings are conically tapered on the inside and soldered onto the tapered regions.