Patent ID: 8791618

Claim:
A squirrel-cage rotor for an induction motor, comprising: a rotor core having a plurality of slots formed therein; a plurality of conductor bars inserted into the slots respectively and made of copper or copper alloy; two conductor end rings joined to the plurality of conductor bars on both end faces of the rotor core and made of copper or copper alloy; and two reinforcing-member end rings attached to at least one of the conductor end rings, sandwiching the conductor end ring therebetween and made of stainless steel having a specific strength greater than that of either copper or copper alloy, wherein the conductor end ring and the reinforcing-member end rings are joined to each other by means of brazing; and wherein the plurality of conductor bars are arranged so as to extend through the conductor end rings and the reinforcing-member end rings; and wherein one of the two reinforcing-member end rings makes contact with the rotor core.