Patent ID: 8193680

Claim:
A squirrel-cage rotor comprising: a rotor core provided with a plurality of circumferentially disposed slot holes opened in a rotational axis direction of the rotor; a pair of end rings disposed at opposite sides of the rotor core in the rotational axis direction of the rotor, each end ring being provided with a plurality of circumferentially disposed through holes opened corresponding to the plurality of circumferentially disposed slot holes; and a plurality of bar elements respectively inserted through the plurality of slot holes and the plurality of through holes, wherein opposite ends of each of the plurality of bar elements are joined to the pair of end rings by brazing, wherein each of the pair of end rings is prepared by laminating a plurality of sheet members, and wherein the plurality of bar elements and each end ring are brazed together through a brazing filler metal sandwiched between adjacent sheet members in advance, the brazing filler metal being adapted to melt and flow by a compressive force applied on both sides of the pair of end rings when the rotor is heated.