Electric motor having electrostatic shield arrangement
AssigneeReliance Electric Technologies, LLC
InventorSidney Bell
Life of this patent
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Abstract
An electromechanical machine includes a stator fixed with respect to a housing structure and a rotor fixed with respect to a driven shaft. The stator includes a magnetically permeable core having a plurality of parallel winding slots containing conductive windings. Coilheads are located at opposite axial ends of the magnetically permeable core where the windings turn to extend down a parallel winding slot. The motor is equipped with an electrostatic shield arrangement to reduce capacitive coupling between the stator and rotor during operation. The shield arrangement comprises a grounded conductive layer separated from the conductive windings of the stator by an insulative layer of cured resin material. Preferably, the conductive layer may be formed of a conductive paint.
Claims6
A method of manufacturing a stator for use in an electromechanical machine, said method comprising steps of:
- (a) providing a magnetically permeable core having conductive windings located in a plurality of parallel, axially extending winding slots, said stator further comprising first and second coilheads located at opposite axial ends of said magnetically permeable core;
- (b) applying an uncured resin material to said stator so as to be located over said conductive windings in said winding slots and inside surfaces of said coilheads in a sufficient amount to yield an insulative layer of predetermined thickness;
- (c) partially curing said resin material applied to said conductive windings;
- (d) applying a metallic material over said insulative layer to form a conductive layer in electrical communication with said magnetically permeable core, said conductive layer being located in said winding slots and on said inside surfaces of said coilheads;
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- (e) finish curing said resin material after said metallic material has been applied on said insulative layer.
Dependencies are inferred from the claim text.