IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0739174
(2000-12-18)
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발명자
/ 주소 |
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
13 인용 특허 :
29 |
초록
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An interlocked stack of laminations for rotors wherein each lamination includes a centrally located, circular indentation. The indentation provides corresponding projections and depressions in the laminas which may be interlocked by engagement of a projection in one lamina with an adjacent depressio
An interlocked stack of laminations for rotors wherein each lamination includes a centrally located, circular indentation. The indentation provides corresponding projections and depressions in the laminas which may be interlocked by engagement of a projection in one lamina with an adjacent depression in an adjacent lamina.
대표청구항
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What is claimed is: 1. A lamination stack, comprising: a plurality of circular laminas stacked about a central stack axis, each said lamina having a plurality of circumferentially disposed openings and a generally circular indentation, each said indentation having a central axis substantially coaxi
What is claimed is: 1. A lamination stack, comprising: a plurality of circular laminas stacked about a central stack axis, each said lamina having a plurality of circumferentially disposed openings and a generally circular indentation, each said indentation having a central axis substantially coaxial with said central stack axis, each said indentation defining a projection on one surface of each said lamina and a depression on the other surface of each said lamina wherein said projections engage adjacent said depressions and thereby interlock said plurality of laminas in a stack. 2. The lamination stack of claim 1, wherein said laminas are formed out of a stock material having a thickness and said indentations extend from the surface of each said lamina about a distance of about half the thickness of the stock material. 3. The lamination stack of claim 1, wherein said openings are angularly displaced and arranged so as to form a plurality of conductor slots. 4. The lamination stack of claim 3, wherein said conductor slots are skewed relative to said common stack axis, whereby said stack of interlocked laminas define conductor slots having a desired skew angle. 5. The lamination stack of claim 3, wherein said conductor slots include first and second portions, said first portion being skewed in a first direction relative to said common stack axis, said second portion being skewed in a second direction relative to said common stack axis to thereby form herringbone shaped conductor slots. 6. A lamination stack, comprising: a plurality of circular laminas stacked together about a central stack axis, each said lamina having a plurality of circumferentially disposed openings and a centrally located, generally circular indentation, each said indentation having a central axis substantially coaxial with said central stack axis, each said indentation defining a projection on one surface of each said lamina and a depression on the other surface of each said lamina, adjacent ones of said laminas being connected by one of said projections engaging an adjacent one of said depressions; and said stack formed by the process of forming said laminas in a stock material, blanking the laminas from the stock material, automatically rotating at least one of the laminas by an angle sufficient to form slots defined by said openings in the stacked laminas, said slots being disposed at a desired skew angle relative to said central axis, and interlocking said indentations so that the projection of one of the laminas extends into the depression of the other lamina. 7. The lamination stack of claim 6, wherein said slots are formed by rotating said at least one of said laminas in one direction for a first portion of said laminas and rotating at least one other said lamina in the other direction for a second portion of said laminas to thereby form herringbone shaped slots. 8. The lamination stack of claim 6, wherein each said lamina includes a plurality of n slots, and each said lamina is automatically rotated relative to said stack of laminas by about 360/n째 to compensate for thickness variations in said stock material. 9. The lamination stack of claim 6, wherein each said lamina includes a plurality of n slots, and each said lamina is automatically rotated relative to said stack of laminas by a multiple of about 360/n째 to compensate for thickness variations in said stock material. 10. The lamination stack of claim 6, wherein said indentations extend below the surface of each said lamina a distance of about half the thickness of the stock material. 11. An interlocked lamination stack, comprising: at least first and second circular laminas, each said lamina having a plurality of openings disposed about an outer periphery thereof and a centrally located, generally circular indentation defining a projection on one surface of each said lamina and a depression on another surface of each said lamina opposite said one surface, said stack having a central stack axis, said projection of said first lamina engaging said depression of said second lamina to interlock said first and second laminas in a stack. 12. The lamination stack of claim 11, wherein said first and second laminas are stacked together, and each said indentation includes a central axis substantially coaxial with said central stack axis. 13. The lamination stack of claim 12, wherein said openings are angularly displaced and arranged so as to form a plurality of conductor slots, said conductor slots skewed relative to said central stack axis. 14. The lamination stack of claim 11, wherein said laminas are formed out of a stock material having a thickness and said indentations extend below the surface of each said lamina a distance of about half the thickness of the stock material. 15. A lamination stack comprising: a plurality of circular laminas stacked about a common stack axis, each said lamina having a plurality of circumferentially disposed openings and a single only indentation, each said indentation having a central axis substantially coaxial with said common stack axis, each said indentation defining a projection on one surface of each said lamina and a depression on the other surface of each said lamina wherein said projections engage adjacent said depressions and thereby interlock said plurality of laminas in a stack.
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