US3633057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator having improved winding distribution
Assignee: General Electric Co
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Filing: 1970-07-21
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Granted: 1972-01-04
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Expires: 1990-07-21
Abstract
Abstract A stator includes a slotted magnetic core supporting first (e.g., main) and second e.g., auxiliary) windings. The main and auxiliary windings are each referred to as including at least first and second coil groups, whether the windings are wound in place, formed as a single coil group and then placed in the slots, formed as two or more groups prior to placement in the slots, or formed by any other suitable method. One of the auxiliary winding coil groups has at least the end turns thereof adjacent one of the core end faces disposed along a first portion of the core and extending along a preselected arcuate region of the core, and a second one of the auxiliary winding coil groups has at least the end turns thereof adjacent the same core end face disposed along the first portion of the core and within the preselected arcuate region. The main winding includes end turns adjacent the auxiliary winding end turns. Preferably, at least the greater part of the main winding end turns adjacent the same above-referred-to core end face extend in the same preselected arcuate region.
Inventors
- 👤 Chester A Smith
- 👤 William M Stoddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:50
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/12; H02K1/00; H02K1/06; H02K1/12; H02K1/16; H02K1/165; H02K17/00; H02K17/02; H02K17/04; H02K7/00; H02K7/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
303 words
For use in a single-phase alternating current motor; a core of magnetic material having a plurality of angularly spacedapart, coil-accommodating slots and a pair of end faces; at least two main coil groups arranged in a number of the slots defining at least two predetermined primary magnetic poles; said at least two main coil groups having an inductance and a resistance, with each of said at least two predetermined primary magnetic poles having a radial polar axis, and with the radial polar axes being angularly spaced apart around said core; and at least two auxiliary coil groups arranged in a number of said slots defining at least two secondary predetermined magnetic poles; said at least two auxiliary coil groups having a resistance greater than the resistance of said at least two main coil groups and having an inductance less than the inductance of said at least two main coil groups; each of the at least two secondary predetermined magnetic poles having a radial polar axis angularly spaced from the individual radial polar axes of the at least two main coil groups; said coil groups of the auxiliary winding including winding end turns; one of the coil groups of the auxiliary winding having at least the end turns thereof adjacent one of the core end faces disposed along a first portion of the core and extending along a preselected arcuate region of a first arcuate extent of the core, and a second one of the coil groups of the auxiliary winding having at least the end turns thereof adjacent said one of the core end faces disposed along said First portion of the core and disposed along a second arcuate extent within said preselected arcuate region, the first arcuate extent being greater than the second arcuate extent and being at least 180 electrical degrees.
Claim 2
Dependent Claim
303 words
For use in a single-phase alternating current motor; a core of magnetic material having a plurality of angularly spacedapart, coil-accommodating slots and a pair of end faces; at least two main coil groups arranged in a number of the slots defining at least two predetermined primary magnetic poles; said at least two main coil groups having an inductance and a resistance, with each of said at least two predetermined primary magnetic poles having a radial polar axis, and with the radial polar axes being angularly spaced apart around said core; and at least two auxiliary coil groups arranged in a number of said slots defining at least two secondary predetermined magnetic poles; said at least two auxiliary coil groups having a resistance greater than the resistance of said at least two main coil groups and having an inductance less than the inductance of said at least two main coil groups; each of the at least two secondary predetermined magnetic poles having a radial polar axis angularly spaced from the individual radial polar axes of the at least two main coil groups; said coil groups of the auxiliary winding including winding end turns; one of the coil groups of the auxiliary winding having at least the end turns thereof adjacent one of the core end faces disposed along a first portion of the core and extending along a preselected arcuate region of a first arcuate extent of the core, and a second one of the coil groups of the auxiliary winding having at least the end turns thereof adjacent said one of the core end faces disposed along said First portion of the core and disposed along a second arcuate extent within said preselected arcuate region, the first arcuate extent being greater than the second arcuate extent and being at least 180 electrical degrees.
Claim 3
Dependent Claim
22 words
The invention as set forth in claim 1 wherein said preselected arcuate region is not substantially greater than about 330 electrical degrees.
Claim 4
Dependent Claim
48 words
The invention as set forth in claim 1 wherein the at least two coil groups of the main winding include end turn portions disposed adjacent the end turns of the coil groups of the auxiliary winding, and the greater part of which extend in said preselected arcuate region.
Claim 5
Dependent Claim
319 words
For use in an alternating current motor; a core of magnetic material having a plurality of angularly spaced-apart, coil-accommodating slots; a first winding arranged in at least some of the slots and including at least two coil groups defining at least two spaced-apart predetermined magnetic poles each having a polar axis; said first winding having an inductance and a resistance; and a second winding including at least two coil groups arranged in at least some of said slots to define at least two other spaced-apart predetermined magnetic poles electrically displaced from the at least two predetermined magnetic poles of said first winding and each having a polar axis; said second winding having a resistance greater than the resistance of said first winding and having an inductance less than the inductance of said first winding; said coil groups of the second winding including end turns and having at least some side turn portions thereof disposed beyond two polar axes associated with the first winding that are next adjacent to one polar axis associated with the second winding, one of the coil groups of the second winding having at least the end turns thereof, which are arranged at one end of the core, disposed along a first portion of the core and extending along a preselected arcuate region of a first arcuate extent; a second one of the coil groups of the second winding having at least the end turns thereof, which are arranged at said one end of the core, disposed along said first portion of the core and disposed along a preselected arcuate region of a second arcuate extent within said preselected arcuate region; the first arcuate extent being greater than the second arcuate extent, with the first arcuate extent encompassing the one polar axis associated with the second winding and the two polar axes associated with the first winding that are next adjacent to the one polar axis.
Claim 6
Dependent Claim
319 words
For use in an alternating current motor; a core of magnetic material having a plurality of angularly spaced-apart, coil-accommodating slots; a first winding arranged in at least some of the slots and including at least two coil groups defining at least two spaced-apart predetermined magnetic poles each having a polar axis; said first winding having an inductance and a resistance; and a second winding including at least two coil groups arranged in at least some of said slots to define at least two other spaced-apart predetermined magnetic poles electrically displaced from the at least two predetermined magnetic poles of said first winding and each having a polar axis; said second winding having a resistance greater than the resistance of said first winding and having an inductance less than the inductance of said first winding; said coil groups of the second winding including end turns and having at least some side turn portions thereof disposed beyond two polar axes associated with the first winding that are next adjacent to one polar axis associated with the second winding, one of the coil groups of the second winding having at least the end turns thereof, which are arranged at one end of the core, disposed along a first portion of the core and extending along a preselected arcuate region of a first arcuate extent; a second one of the coil groups of the second winding having at least the end turns thereof, which are arranged at said one end of the core, disposed along said first portion of the core and disposed along a preselected arcuate region of a second arcuate extent within said preselected arcuate region; the first arcuate extent being greater than the second arcuate extent, with the first arcuate extent encompassing the one polar axis associated with the second winding and the two polar axes associated with the first winding that are next adjacent to the one polar axis.
Claim 7
Dependent Claim
22 words
The invention as set forth in claim 4 wherein said preselected arcuate region is not substantially greater than about 330 electrical degrees.
Claim 8
Dependent Claim
48 words
The invention as set forth in claim 4 wherein the at least two coil groups of the first winding include end turn portions disposed adjacent the end turns of the coil groups of the second winding, and the greater part of which extend in said preselected arcuate region.
Claim 9
Dependent Claim
43 words
The invention as set forth in claim 4 wherein the electrical displacement of each of the at least two other spaced-apart predetermined magnetic poles of the second winding with respect to each magnetic pole of the first winding is approximately 90 electrical degrees.
References Cited (Backward Citations)
US2399931A
Cited
US2485628A
Cited
US2498704A
Cited
US3235762A
Cited
US3421034A
Cited
US3421033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |