Stator support structure with stamped end plates

An internal spool shaped non-magnetic support structure of an inductor type dynamoelectric machine, said structure serving to support and accurately position a plurality of stationary, generally U-shaped, longitudinally extending armature elements, circumferentially distributed about a central longitudinal axis, each U-shaped armature element comprising a winding bearing base portion extending parallel to said longitudinal axis with a leg extending from each end of said base portion in a radially inward direction, said support structure comprising:

• a central cylindrical tube concentric with said axis;
• and
• a laminate annular end plate located at each end of said tube and extending radially outward relative to said longitudinal axis, each end plate having substantially parallel axially inner and outer surfaces extending between radially inner and outer edges, each end plate possessing a rabbet along the radially inner edge near the axially inner surface configured to mate with a corresponding end of said tube, a plurality of spaced apart recessed landings circumferentially distributed about the outer edge and configured to receive and position the base portions of the armature elements, and a plurality of through cut axially extending cooling ports spaced along the inner edge of the plate, each of said cooling ports extending in a radial direction beyond an exterior surface of said central tube so that cooling fluid can be admitted through said cooling ports to the exterior of said tube.

An internal spool shaped non-magnetic support structure of an inductor type dynamoelectric machine, said structure serving to support and accurately position a plurality of stationery, generally U-shaped, longitudinally extending armature elements, circumferentially distributed about a central longitudinal axis, each U-shaped armature element comprising a winding bearing base portion extending parallel to said longitudinal axis with a leg extending from each end of said base portion in a radially inward direction, said support structure comprising

• a central cylindrical tube concentric with said axis;
• and
• an annular end plate comprising a single stamping located at each end of said tube and extending radially outward relative to said longitudinal axis, each end plate having substantially parallel axially inner and outer surfaces extending between radially inner and outer edges, each end plate possessing:
• a plurality of spaced apart recessed landings circumferentially distributed about the outer edge and configured to receive and position the base portions of the armature elements, a first plurality of spaced tabs bent out of a plane containing said end plate and extending away from the axially outer surface of said plate for receiving and positioning legs of said armature elements between adjacent ones of said tabs, and a second plurality of spaced tabs bent out of said plane and extending inwardly from the axially inner surface of said plate, said second plurality of tabs being radially positioned to provide a press fit about an exterior surface of an end of said central tube.