US3633056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator slot and winding arrangements
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, for use in an alternating current motor, includes a core having a plurality of angularly spaced slots. A distributed main winding is concentrically arranged in a plurality of the slots, with these slots encompassing a first arcuate region of the core, less than its circumference. End turns for the main winding are positioned adjacent an end face of the first arcuate region of the core. This provides a second arcuate region of at least one end face of the core free of the main winding. In a first embodiment, an auxiliary winding, displaced in phase from the main winding, is received in a plurality of the slots, including at least some slots in the second arcuate region. In the first embodiment, end turns of the auxiliary winding in the second arcuate region are disposed inwardly of the radially outermost edges of the slots in the second arcuate region along at least one end face of the core. In a second embodiment, the second arcuate region of one end face of the core is free of both the auxiliary winding and the main winding.
Inventors
- 👤 William R Hoffmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:47
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/12; H02K1/00; H02K1/06; H02K1/12; H02K1/16; H02K1/165; H02K7/00; H02K7/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
126 words
For use in an alternating current motor; a stator including: a. a core of magnetic material having a plurality of substantially angularly spaced apart, coil-accommodating slots; b. a distributed winding arranged in a plurality of said slots and including at least two coil groups defining at least two predetermined magnetic poles; c. each of said at least two predetermined magnetic poles having a radial polar axis, with said radial polar axes being substantially angularly spaced apart round said core; and d. said at least two coil groups being arranged generally concentrically about one of said radial polar axes to leave a preselected polar region of said core in the vicinity of the other of said radial polar axes free of said at least two coil groups.
Claim 2
Dependent Claim
126 words
For use in an alternating current motor; a stator including: a. a core of magnetic material having a plurality of substantially angularly spaced apart, coil-accommodating slots; b. a distributed winding arranged in a plurality of said slots and including at least two coil groups defining at least two predetermined magnetic poles; c. each of said at least two predetermined magnetic poles having a radial polar axis, with said radial polar axes being substantially angularly spaced apart round said core; and d. said at least two coil groups being arranged generally concentrically about one of said radial polar axes to leave a preselected polar region of said core in the vicinity of the other of said radial polar axes free of said at least two coil groups.
Claim 3
Dependent Claim
23 words
The invention as set forth in claim 1 wherein said preselected polar region has an arcuate length of at least 30 electrical degrees.
Claim 4
Dependent Claim
79 words
The invention as set forth in claim 1 wherein said stator also includes an auxiliary winding arranged in a plurality of said slots displaced in phase from said distributed winding; at least some of the coils of said auxiliary winding being received in slots formed in said preselected polar region of said core; the end turns associated with said last named coils being substantially disposed inwardly of the radially outermost edges of said slots in said preselected polar region.
Claim 5
Dependent Claim
92 words
For use in an alternating current motor; a stator including: a. a core of magnetic material having a plurality of substantially angularly spaced apart slots; b. a distributed winding concentrically arranged in a plurality of said slots; c. said plurality of slots encompassing a first arcuate region of said core, less than its circumference; and d. the end turns associated with said distributed winding being positioned adjacent an end face of said first arcuate region of said core whereby a second arcuate region of said core is provided free of said winding.
Claim 6
Dependent Claim
92 words
For use in an alternating current motor; a stator including: a. a core of magnetic material having a plurality of substantially angularly spaced apart slots; b. a distributed winding concentrically arranged in a plurality of said slots; c. said plurality of slots encompassing a first arcuate region of said core, less than its circumference; and d. the end turns associated with said distributed winding being positioned adjacent an end face of said first arcuate region of said core whereby a second arcuate region of said core is provided free of said winding.
Claim 7
Dependent Claim
24 words
The invention as set forth in claim 4 wherein said second arcuate region has an arcuate length of at least about 30 electrical degrees.
Claim 8
Dependent Claim
70 words
The invention as set forth in claim 4 wherein said stator also includes an auxiliary winding arranged in a plurality of said slots, including at least some slots in said second arcuate region of said core; end turns of said auxiliary winding in said second arcuate region of said core being substantially disposed inwardly of the radially outermost edges of the slots in said second arcuate region of said core.
Claim 9
Dependent Claim
172 words
For use in an alternating current motor; a stator including: a. a core of magnetic material compriSing a yoke and a rotor receiving bore; b. said bore having an axis extending longitudinally of said yoke; c. said yoke defining a plurality of angularly spaced-apart slots; d. a plurality of adjacent ones of said slots extending a shorter radial distance from said axis than other of said slots, said plurality of adjacent ones of said slots being disposed in one arcuate region of said core; e. distributed winding concentrically arranged in other of said slots; the end turns associated with said distributed winding being positioned adjacent an end face of said core in another arcuate region of said core defined by said other slots; and f. an auxiliary winding arranged in at least some of said slots, including said adjacent ones of said slots; and end turns associated with said auxiliary winding, in said one arcuate region, being substantially disposed inwardly of the radially outermost edges of said adjacent ones of said slots.
Claim 10
Dependent Claim
172 words
For use in an alternating current motor; a stator including: a. a core of magnetic material compriSing a yoke and a rotor receiving bore; b. said bore having an axis extending longitudinally of said yoke; c. said yoke defining a plurality of angularly spaced-apart slots; d. a plurality of adjacent ones of said slots extending a shorter radial distance from said axis than other of said slots, said plurality of adjacent ones of said slots being disposed in one arcuate region of said core; e. distributed winding concentrically arranged in other of said slots; the end turns associated with said distributed winding being positioned adjacent an end face of said core in another arcuate region of said core defined by said other slots; and f. an auxiliary winding arranged in at least some of said slots, including said adjacent ones of said slots; and end turns associated with said auxiliary winding, in said one arcuate region, being substantially disposed inwardly of the radially outermost edges of said adjacent ones of said slots.
Claim 11
Dependent Claim
61 words
The invention as set forth in claim 7 in which both some coils of said distributed winding and some coils of said distributed winding and some coils of said auxiliary winding are received in the same ones of said other of said slots; said coils of said auxiliary winding being placed therein radially inwardly of said coils of said distributed winding.
Claim 12
Dependent Claim
27 words
The invention as set forth in claim 7 wherein said one arcuate region of said core has an arcuate length of at least about 30 electrical degrees.
Claim 13
Dependent Claim
39 words
The invention as set forth in claim 7 wherein each of said adjacent ones of said slots have radial depth of no more than about 37 percent of the radial depth of said one arcuate region of said core.
Claim 14
Dependent Claim
120 words
For use in an alternating current motor; a core of magnetic material having a plurality of substantially angularly spaced-apart, coil-accommodating slots; a first distributed winding arranged in a plurality of said slots and including at least two coil groups defining at least two predetermined magnetic poles; each of said at least two predetermined magnetic poles having a radial polar axis, with the radial polar axes being substantially angularly spaced apart around said core; and said at least two coil groups being arranged generally concentrically about one of said radial polar axes to leave a preselected polar region of said core in the vicinity of the other of said radial polar axes generally free of said at least two coil groups.
Claim 15
Dependent Claim
120 words
For use in an alternating current motor; a core of magnetic material having a plurality of substantially angularly spaced-apart, coil-accommodating slots; a first distributed winding arranged in a plurality of said slots and including at least two coil groups defining at least two predetermined magnetic poles; each of said at least two predetermined magnetic poles having a radial polar axis, with the radial polar axes being substantially angularly spaced apart around said core; and said at least two coil groups being arranged generally concentrically about one of said radial polar axes to leave a preselected polar region of said core in the vicinity of the other of said radial polar axes generally free of said at least two coil groups.
Claim 16
Dependent Claim
23 words
The invention as set forth in claim 11 wherein said preselected polar region has an arcuate length of at least 30 electrical degrees.
Claim 17
Dependent Claim
89 words
The invention as set forth in claim 11 in which the magnetic core has an axis of revolution for a rotor and at least one of said coil-accommodating slots extends a shorter radial distance from the revolution axis than other of said coil-accommodating slots, said at least one slot being disposed generally in another preselected polar region of said core; said first distributed winding having end turns positioned adjacent at least one end face of said core and being extended across and angularly beyond said another preselected polar region.
Claim 18
Dependent Claim
72 words
The invention as set forth in claim 13 in which a second distributed winding is arranged in some of said slots, including said at least one slot; and end turns associated with said second distributed winding being disposed generally inwardly of the radially outer edge of said at least one slot to allow space adjacent the at least one end face of the core for end turns of the first distributed winding.
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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) | 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 |