Method and apparatus to reduce operating noise of dynamo electri

Details Method and apparatus to reduce operating noise of dynamo electri Method and apparatus to reduce operating noise of dynamo electri

1986-04-04

1987-08-18

Hall, Carl E.

Electrical generator or motor structure

Dynamoelectric

Rotary

29596, 29609, 228190, 310 51, 310216, 310217, H02K 1502

Patent

active

046879609

ABSTRACT:
To counteract magnetic forces arising in the operation of a dynamo electric machine, and more particularly a vehicular, especially automotive three-phase alternator, causing, in operation, noise due to shifting of laminations under the influence of magnetic forces, the stator laminations are connected together at a circumferential edge, preferably the outer circumference, by a welding seam or track applied by laser welding. More than one seam or track may be provided, the welding seams or tracks extending in undulating or zig-zag form from one end face of the stack to the other in a criss-cross or mesh pattern.

REFERENCES:
patent: 2845555 (1958-07-01), Carpenter et al.
patent: 3330031 (1967-07-01), Rediger et al.

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