Stator of dynamo-electric machine

DETAILED DESCRIPTION The object of the present invention is therefore to provide a stator of a dynamo-electric machine whereby a winding can be wound in alignment outside the stator with high density, the end part of the winding occupies less space, a joint part of pole-tooth units which could decrease the efficiency of the motor becomes unnecessary and also resin molding, used to secure rigidity, is not required.
The stator is designed with a divided structure so that even a press plant of a small size will serve a large-size core for the stator.
In accomplishing these and other objects, according to one aspect of the present invention, there is provided a stator of a dynamo-electric machine comprising core pieces obtained by laminating iron plates divided in a circumferential direction per pole-tooth unit and having projecting and recessed engaging parts at their dividing faces, and then welding the iron plates by laser at their inner and outer peripheries.
A winding part is formed around each pole-tooth unit of the core pieces, wherein a predetermined number of the core pieces are bonded into a shape of a loop with the projecting and recessed engaging parts engaged with each other and rigidly welded in outer peripheries of bonding faces by laser at a laminating direction.