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US3591819A
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US
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Multiple-pole rotating electrical machines
Assignee: Individual
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Filing: 1969-03-05
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Granted: 1971-07-06
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Expires: 1989-03-05
Abstract
Abstract The poles of a multiple-pole rotating electrical machine take the form of discrete elements which can be so moved along the length of coil channels bounded by the poles that all the poles together form a pole ring in which at least every other pole is identical. The winding for a pole ring of this kind is embodied by one or more meandering continuous coils. To form the pole ring, a prefabricated winding comprising one or more meandering continuous coils is inserted into a channel bounded by one set of poles after which a further set of poles are pushed axially into contact with the first set to form a pole ring. These meandering coils can be used in axial split-casing motors. The meandering coils are produced in an apparatus having arms which move radially towards a center and which have at their ends grippers rotatable through 90*. As a final feature, annular lamination groups used in rotating electrical machines are produced from coiled metal strips.
Inventors
- 👤 Nikolaus Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:35
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/04; H02K15/044; H02K15/047; H02K15/048; H02K15/0485; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/141; H02K1/146; H02K1/148; H02K1/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
229 words
A multiple-pole rotary electrical machine having a rotor part and a stator part with an airgap therebetween wherein at least one part comprises a soft iron core having poles extending toward said airgap and a winding extending axially of said core; the improvement comprising in that each pole is a separate unit adapted to be joined with an adjacent unit by being pushed together axially with respect to the core whereby all of the units together form a pole ring in which every other pole is identical and in that the axial length of said winding does not exceed the axial length of said units when said units are pushed together to form a pole ring, where each said pole comprises two groups of a plurality of rectangular laminations with each lamination being curved into a horseshoe shape and where the laminations of one group are curved in one direction and the laminations of the other group are curved in an opposite direction, wherein one end of one group of laminations is adjacent an end of the other group of laminations to form a pole shoe wherein all of the laminations extend axially of the core and where the ends of a group of laminations opposite from the ends forming a pole shoe are overlapped to join with overlapped ends of a group of laminations of an adjacent pole.
Claim 2
Dependent Claim
229 words
A multiple-pole rotary electrical machine having a rotor part and a stator part with an airgap therebetween wherein at least one part comprises a soft iron core having poles extending toward said airgap and a winding extending axially of said core; the improvement comprising in that each pole is a separate unit adapted to be joined with an adjacent unit by being pushed together axially with respect to the core whereby all of the units together form a pole ring in which every other pole is identical and in that the axial length of said winding does not exceed the axial length of said units when said units are pushed together to form a pole ring, where each said pole comprises two groups of a plurality of rectangular laminations with each lamination being curved into a horseshoe shape and where the laminations of one group are curved in one direction and the laminations of the other group are curved in an opposite direction, wherein one end of one group of laminations is adjacent an end of the other group of laminations to form a pole shoe wherein all of the laminations extend axially of the core and where the ends of a group of laminations opposite from the ends forming a pole shoe are overlapped to join with overlapped ends of a group of laminations of an adjacent pole.
Claim 3
Dependent Claim
57 words
A multiple pole rotary electrical machine according to claim 1 in which the overlapped ends are staggered relative to one another whereby when one pole is joined with an adjacent pole, the staggered ends of a group of laminations of one pole will engage with the staggered ends of a group of laminations of an adjacent pole.
Claim 4
Dependent Claim
122 words
A multiple-pole rotary electrical machine having a rotor part and a stator part with an airgap therebetween wherein at least one part comprises a soft iron core having poles extending towards said air gap and a winding extending axially of the core; the improvement comprising in that each pole comprises a plurality of laminations forming a separate unit adapted to be joined with an adjacent unit by being pushed together axially with respect to the core whereby all of the units together form a pole ring in which every other pole is identical and in that the axial length of said winding is equal to the axial length of said units when said units are pushed together to form a pole ring.
Claim 5
Dependent Claim
122 words
A multiple-pole rotary electrical machine having a rotor part and a stator part with an airgap therebetween wherein at least one part comprises a soft iron core having poles extending towards said air gap and a winding extending axially of the core; the improvement comprising in that each pole comprises a plurality of laminations forming a separate unit adapted to be joined with an adjacent unit by being pushed together axially with respect to the core whereby all of the units together form a pole ring in which every other pole is identical and in that the axial length of said winding is equal to the axial length of said units when said units are pushed together to form a pole ring.
Claim 6
Dependent Claim
92 words
A multiple-pole rotary electrical machine according to claim 3 characterized in that each said pole comprises two groups of a plurality of rectangular laminations with each lamination being curved into a horseshoe shape and where the laminations of one group are curved in one direction and the laminations of the other group are curved in an opposite direction and wherein one end of one group of laminations is adjacent an end of the other group of laminations to form a pole shoe and wherein all the laminations extend axially of the core.
Claim 7
Dependent Claim
86 words
A multiple-pole rotary electrical machine according to claim 3 characterized in that each said pole comprises two groups of a plurality of rectangular laminations with each said lamination being curved into a horseshoe shape wherein one of the ends of the horseshoe of one group of laminations forms a half of a pole shoe and one of the ends of the horseshoe of the other group of laminations forms the other half of the pole shoe and wherein all the laminations extend axially of the core.
Claim 8
Dependent Claim
36 words
A multiple-pole rotary electrical machine according to claim 3 wherein said machine is a split field motor having a short circuit ring extending around some of the ends of the laminations which form the pole shoe.
Claim 9
Dependent Claim
44 words
A multiple-pole rotary electrical machine according to claim 3 wherein each said pole comprises a plurality of laminations extending in a radial direction with respect to said core with a portion of each lamination being punched out to form a part of a pole.
Claim 10
Dependent Claim
51 words
A multiple-pole rotary electrical machine according to claim 7 characterized in that said laminations are bent in an axial direction with respect to said core whereby recesses are formed on one axial end of a group of said laminations forming a pole into which a portion of a coil may fit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |