Claims
- 1. A stator core for supporting an electrical coil and channeling magnetic flux therefrom comprising:
- a plurality of groups of circumferentially abutting flat elements extending radially outwardly from a common centerline axis to collectively define a radially inner bore and a radially outer perimeter; and
- a plurality of wedges interposed between said groups, each wedge having a radially inner edge, and a radially outer edge being thicker than said inner edge, with said outer edges abutting adjacent ones of said groups to provide a continuous path around said perimeter.
- 2. A core according to claim 1 wherein each of said elements has a constant thickness, and each of said groups has a constant thickness.
- 3. A core according to claim 2 wherein each of said wedges is configured to separate said groups to form an acute angle between adjacent ones of said groups from said bore to said perimeter.
- 4. A core according to claim 3 wherein said groups and interposed wedges are configured in a plurality of arcuate sectors, with said elements and wedges of each sector being fixedly joined together.
- 5. A core according to claim 4 wherein thickness of said wedges increases continuously and linearly from said inner edge to said outer edge.
- 6. A core according to claim 5 wherein said wedge is substantially solid.
- 7. A core according to claim 5 wherein said wedge is key-shaped with a generally square back adjacent said inner edge and an elongate shank extending therefrom to said outer edge, said wedge shank having a hollow and recessed central portion.
- 8. A core according to claim 4 wherein said wedge comprises:
- a sole plate extending from said inner edge to said outer edge; and
- a heel block fixedly joined to said sole plate at said outer edge, said heel block being thicker than said sole plate.
- 9. A core according to claim 8 wherein said sole plate is key-shaped with a generally square back adjacent said inner edge, and an elongate shank extending therefrom to said outer edge, and said heel block is fixedly joined to said shank at said outer edge and is coextensive therewith.
- 10. A core according to claim 9 wherein said heel block is tapered and has a decreasing thickness from said outer edge toward said inner edge.
- 11. A core according to claim 10 wherein said back is completely tapered and has an increasing thickness from said inner edge toward said outer edge.
- 12. A core according to claim 10 wherein said sole plate is sheet metal having a constant thickness, and said back includes a pair of cantilevered leaf springs extending from said back toward said heel block on opposite sides of said shank in abutting contact with adjacent one of said groups.
- 13. A core according to claim 4 wherein said laminations and said wedges have radially inner and outer holes adjacent said inner and outer edges, respectively; and further comprising a pair of tie rods, each extending through respective ones of said inner and outer holes to fixedly join together said laminations and said wedges in each of said sectors.
- 14. A core according to claim 13 further comprising an alignment ring disposed coaxially in said bore, and a plurality of bolts extending radially outwardly through said ring and threadingly into said sectors for fixedly joining said sectors to said ring.
Parent Case Info
The present invention is a continuation-in-part of application Ser. No. 07/836,475, filed Feb. 18, 1992 now U.S. Pat. No. 5,195,231, by A. W. Fanning et al, entitled "Method For Producing Inner Stators For Electromagnetic Pumps."
Government Interests
The U.S. Government has rights in this invention in accordance with Contract No. DOE DE-AC03-89SF17445 awarded by the Department of Energy.
US Referenced Citations (5)
Continuation in Parts (1)
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Number |
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Parent |
836475 |
Feb 1992 |
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