Method of forming electrical machine care from E-laminations
First Claim
1. The method of forming an annular core for an electrical machine component consisting of the steps of stacking a plurality of plate-like E-laminations in aligned relation with each lamination including a web and three legs perpendicular to one edge thereof and opposed parallel flat side surfaces, bending the E-laminations by exerting force on the outer legs while maintaining pressure on the flat surfaces thereof to prevent lateral deflection and deforming the web into arcuate configuration conforming to the curvature of the core being formed, rigidly securing a plurality of the bent and deformed stacks of E-laminations in end-to-end relation to form an annular core, assembling coil windings on the poles formed by the legs of the assembled E-laminations, and encapsulating the coil windings and E-laminations in potting material, said step of rigidly securing the stacks of E-laminations in end-to-end relation including the step of welding backing plates interiorly of the curved edges of the webs of the stacked E-laminations thereby providing a rigid annular core, assembling a central hub with spokes extending therefrom rigidly secured to the backing plates to provide a bearing support for the core.
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Accused Products
Abstract
The use of E-shaped transformer laminations in rotating electrical machinery in which the E-laminations are modified and assembled in a stacked manner and fixedly secured in rigid relationship to form a stator or rotor core receiving appropriate windings encapsulated by hardenable material to produce a stator or rotor for rotating electrical machinery at a relatively low cost with maximum engineering flexibility, lightweight construction and efficient operation. One utility of the novel use is in the construction of low speed alternators such as a wind-driven assembly for producing electrical energy.
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Citations
6 Claims
- 1. The method of forming an annular core for an electrical machine component consisting of the steps of stacking a plurality of plate-like E-laminations in aligned relation with each lamination including a web and three legs perpendicular to one edge thereof and opposed parallel flat side surfaces, bending the E-laminations by exerting force on the outer legs while maintaining pressure on the flat surfaces thereof to prevent lateral deflection and deforming the web into arcuate configuration conforming to the curvature of the core being formed, rigidly securing a plurality of the bent and deformed stacks of E-laminations in end-to-end relation to form an annular core, assembling coil windings on the poles formed by the legs of the assembled E-laminations, and encapsulating the coil windings and E-laminations in potting material, said step of rigidly securing the stacks of E-laminations in end-to-end relation including the step of welding backing plates interiorly of the curved edges of the webs of the stacked E-laminations thereby providing a rigid annular core, assembling a central hub with spokes extending therefrom rigidly secured to the backing plates to provide a bearing support for the core.
- 5. The method of forming an annular core for an electrical machine component consisting of the steps of stacking a plurality of plate-like E-laminations in aligned relation with each lamination including a web and three legs perpendicular to one edge thereof and opposed parallel flat side surfaces, bending the E-laminations by exerting force on the outer legs while maintaining pressure on the flat surfaces thereof to prevent lateral deflection and deforming the web into arcuate configuration conforming to the curvature of the core being formed, and rigidly securing a plurality of the bent and deformed stacks of E-laminations in end-to-end relation to form an annular core, said step of rigidly securing the stacks of E-laminations in end-to-end relation including the step of rigidly securing backing plates along the curved edges of the webs of the stacked E-laminations in bridging relation to the joint between adjacent end-to-end stacks thereby providing a rigid annular core.
Specification