Flux shield for dynamoelectric machines

Claim 2

In a dynamoelectric machine of the type including a stator core comprising a plurality of laminations held in assembled relation by a number of circumferentially spaced, axially extending keybars secured at each opposite end to a respective end flange; an improved flux shield assembly at each end of the dynamoelectric machine, wherein the improVement comprises: a. a non-magnetic, annular flux shield of high electrical conductivity spaced from but adjacent to a respective end flange on a side further removed from the stator core; b. fastening means securing each flux shield to its respective end flange; and, c. means in combination with said fastening means for electrically insulating each flux shield from its respective end flange.

Claim 3

In a dynamoelectric machine of the type including a stator core comprising a plurality of laminations held in assembled relation by a number of circumferentially spaced, axially extending keybars secured at each opposite end to a respective end flange; an improved flux shield assembly at each end of the dynamoelectric machine, wherein the improvement comprises: a. a non-magnetic, annular flux shield of high electrical conductivity spaced from but adjacent to a respective end flange on a side further removed from the stator core; b. fastening means securing each flux shield to its respective end flange; c. means in combination with said fastening means for electrically insulating each flux shield from its respective end flange; and, d. means for electrically connecting each flux shield to its respective end flange through a single ground connection between said end flange and said flux shield, said ground connection including a resistor.

Claim 4

In a dynamoelectric machine of the type including a stator core comprising a plurality of laminations held in assembled relation by a number of circumferentially spaced, axially extending keybars secured at each opposite end to a respective end flange; an improved flux shield assembly at each end of the dynamoelectric machine, wherein the improvement comprises: a. a non-magnetic, annular flux shield of high electrical conductivity spaced from but adjacent to a respective end flange on a side further removed from the stator core; b. fastening means securing each flux shield to its respective end flange; c. means in combination with said fastening means for electrically insulating each flux shield from its respective end flange; and, d. means for electrically connecting each flux shield to its respective end flange through a single ground connection between said end flange and said flux shield, said ground connection including a resistor.

Claim 5

The improvement as defined in claim 1 wherein said fastening means comprises a plurality of bolts extending through each flux shield and engaging its respective end flange and wherein said means for electrically insulating each respective flux shield comprises an electrically insulating sleeve on each of said bolts and further comprises washers of electrically insulating material interposed between each flux shield and its respective end flange and between each flux shield and the head of each of said bolts.

Claim 6

The improvement of claim 1 further including means for electrically connecting said flux shield to said end flange at one point to provide a ground connection between said end flange and said flux shield, said ground connection including a resistor.

Claim 7

The improvement of claim 4 wherein said means for electrically connecting said flux shield to said end flange to provide a ground connection includes: a. means for mounting said resistor on said end flange, b. a member of electrically conducting material mounted on said flux shield, and c. one terminal of said resistor being connected in electrically conducting relationship with said end flange and the other terminal of said resistor being electrically connected to said member.