Rotor having balance weights

Claim 2

A rotor for use in an induction type dynamoelectric machine comprising a magnetizable core having a plurality of conductor slots; slot conductors of nonmagnetic electrically conducting material cast in the slots; at least one end conductor having at least one weight mounting means for receiving a balance weight, the end conductor interconnecting at least some of the slot conductors; and a balance weight; the weight mounting means being a stud having an enlarged portion with the enlarged portion cast into the at least one end conductor, said enlarged portion being embedded in the at least one end conductor to firmly anchor the weight mounting means therein; and the balance weight being positioned on the stud and being secured thereto so that the balance weight fixedly becomes part of the rotor.

Claim 3

The rotor of claim 1 wherein the stud includes means for facilitating the insertion of the weight mounting means in a mold prior to casting the end conductor; said means for facilitating including a tool receiving portion.

Claim 4

The rotor of claim 1 wherein the balance weight is welded to the weight mounting means.

Claim 5

A cast squirrel cage rotor for a dynamoelectric machine, said rotor comprising: at least one stud having a first end thereof embedded in an end ring of the rotor, said stud having a portion that extends beyond the end ring; at least one weight securely attached to the portion of the stud that extends beyond the end ring; and said stud including anchor means embedded in the end ring to ensure that the stud and at least one weight remain assembled together.

Claim 6

A cast squirrel cage rotor for a dynamoelectric machine, said rotor comprising: at least one stud having a first end thereof embedded in an end ring of the rotor, said stud having a portion that extends beyond the end ring; at least one weight securely attached to the portion of the stud that extends beyond the end ring; and said stud including anchor means embedded in the end ring to ensure that the stud and at least one weight remain assembled together.

Claim 7

A cast squirrel cage rotor for a dynamoelectric machine, aid rotor comprising: first means for mounting at least one weight cast into an end ring of the rotor so that a portion of the first means extends beyond the end ring, at least one weight securely attached to the portion of the first means that extends beyond the end ring, and second means located on the first means and embedded in the end ring to ensure that the first means and the at least one weight remain assembled together during normal conditions; said first means comprising a stud having a first portion embedded in the end ring and a second portion extending from the end ring, and said second means comprising a headed portion of the stud; the at least one weight being securely attached to the second portion of the stud between the end of the stud and the end ring.

Claim 8

A cast squirrel cage rotor for a dynamoelectric machine, aid rotor comprising: first means for mounting at least one weight cast into an end ring of the rotor so that a portion of the first means extends beyond the end ring, at least one weight securely attached to the portion of the first means that extends beyond the end ring, and second means located on the first means and embedded in the end ring to ensure that the first means and the at least one weight remain assembled together during normal conditions; said first means comprising a stud having a first portion embedded in the end ring and a second portion extending from the end ring, and said second means comprising a headed portion of the stud; the at least one weight being securely attached to the second portion of the stud between the end of the stud and the end ring.

Claim 9

An improved rotor for use in a dynamoelectric machine including a stack of laminations having a plurality of conductor slots, conductors of nonmagnetic electrically conducting material cast in the slots and interconnected at each end of the stack by cast annular end rings of the same material as the conductors to form a cast squirrel cage winding wherein the improvement comprises: at least one stud partially embedded in at least one of the cast end rings, the stud having a first diameter and having a length greater than the first diameter, one end of the stud being of a greater diameter than the first diameter, and wherein the end of greater diameter is embedded in the cast end ring to prevent any rotational forces of the rotor from dislodging the stud; and a plurality of thin flat weights having at least one stud accommodating hole therein positioned on the at least one stud, the at least one stud being welded to a top one of the plurality of weights and thereby fixedly retaining the weights on the at least one stud.

Claim 10

An improved rotor for use in a dynamoelectric machine including a stack of laminations having a plurality of conductor slots, conductors of nonmagnetic electrically conducting material cast in the slots and interconnected at each end of the stack by cast annular end rings of the same material as the conductors to form a cast squirrel cage winding wherein the improvement comprises: at least one stud partially embedded in at least one of the cast end rings, the stud having a first diameter and having a length greater than the first diameter, one end of the stud being of a greater diameter than the first diameter, and wherein the end of greater diameter is embedded in the cast end ring to prevent any rotational forces of the rotor from dislodging the stud; and a plurality of thin flat weights having at least one stud accommodating hole therein positioned on the at least one stud, the at least one stud being welded to a top one of the plurality of weights and thereby fixedly retaining the weights on the at least one stud.