Patent US3777197A successfully refreshed from Google Patents.
US3777197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment assembly for stator windings
Assignee: English Electric Co Ltd
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Filing: 1973-01-03
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Granted: 1973-12-04
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Expires: 1993-01-03
Abstract
Abstract A dynamo electric machine which has a stator winding disposed in the rotor-stator air gap. The rotor winding comprises coils having straight axially extending side portions which are supported in trough members which have radially extending side walls the outer ends of which fit into slots in the stator core. The troughs may have cover plates also having side walls extending into the stator slots, and the troughs with the windings therein form a cylindrical structure in the air gap. This structure can be held in position closely adjacent the stator core by conformable packing or wedges associated with the side walls of the troughs and the stator slots.
Inventors
- 👤 T Preston
- 👤 A Reece
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:23
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/46; H02K3/47
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
107 words
A dynamo electric machine having a rotor core and a stator core separated by an annular rotor-stator air gap and including a stator winding comprising coils which have straight side portions, the straight side portions of the coils being disposed within the rotor-stator air gap supported in a plurality of axially extending trough members which have radially extending side walls the outer ends of which fit into axially extending slots provided in the stator core, the trough members with the straight coil side portions therein forming a cylindrical structure within the rotor-stator air gap adjacent the stator core and spaced from the surface of the rotor core.
Claim 2
Dependent Claim
107 words
A dynamo electric machine having a rotor core and a stator core separated by an annular rotor-stator air gap and including a stator winding comprising coils which have straight side portions, the straight side portions of the coils being disposed within the rotor-stator air gap supported in a plurality of axially extending trough members which have radially extending side walls the outer ends of which fit into axially extending slots provided in the stator core, the trough members with the straight coil side portions therein forming a cylindrical structure within the rotor-stator air gap adjacent the stator core and spaced from the surface of the rotor core.
Claim 3
Dependent Claim
35 words
A machine according to claim 1 in which each trough member includes a radially outer cover plate fitted over the straight coil sides, between the coil sides and the adjacent face of the stator core.
Claim 4
Dependent Claim
36 words
A machine according to claim 2 in which each cover plate includes radially extending side walls which fit within the side walls of the trough member and also extend into the slots in the stator core.
Claim 5
Dependent Claim
39 words
A machine according to claim 3 including an axially extending cap of channel section fitted over the ends of adjacent radially extending side walls, each channel section being a good fit within an associated slot in the stator core.
Claim 6
Dependent Claim
46 words
A machine according to claim 3 including an axially extending cap of channel section fitted over adjacent radially extending side walls for insertion into associated slots in the stator core with conformable packing members between the channel sections and the walls of the stator core slots.
Claim 7
Dependent Claim
31 words
A machine according to claim 1 wherein the width of the troughs is such that they can be assembled to form a substantially unbroken continuous cylindrical structure within the stator bore.
Claim 8
Dependent Claim
48 words
A machine according to claim 1 wherein the width of the troughs is such that when they are assembled into the stator bore a space is left between at least one pair of side walls of adjacent troughs, and including packing inserted into the or each such space.
Claim 9
Dependent Claim
13 words
A machine according to claim 7 in which the packing comprises tapered wedges.
Claim 10
Dependent Claim
74 words
A machine according to claim 2 in which one or more of the axially extending slots in the stator core are so shaped that at least part of the radially outer part of the slot is wider than the mouth of the slot, adjacent side walls extending into such slot having portions which extend circumferentially into the wider part of the slot so that said side walls can be keyed into the stator slots.
Claim 11
Dependent Claim
28 words
A machine according to claim 9 in which pairs of adjacent side walls are of generally overall dovetail shape and fit into slots of the same cross section.
Claim 12
Dependent Claim
25 words
A machine according to claim 2 in which the troughs and the cover plates are formed with ducts for the passage of a cooling medium.
Claim 13
Dependent Claim
60 words
A machine according to claim 2 in which the radially outer face of One or more of the cover plates is formed with radially extending ribs so that when the cover plates are in position ducts are provided between at least part of these plates and the inner face of the stator core for the passage of a cooling medium.
Claim 14
Dependent Claim
31 words
A machine according to claim 5 in which the conformable packing members used between troughs are so arranged as to leave axially extending ducts for the passage of a cooling medium.
Claim 15
Dependent Claim
26 words
A machine according to claim 7 in which the packing is so arranged as to leave axially extending ducts for the passage of a cooling medium.
Claim 16
Dependent Claim
17 words
A machine according to claim 1 in which the troughs are substantially all of the same width.
Claim 17
Dependent Claim
29 words
A machine according to claim 1 in which at least some of the troughs used to form the cylindrical structure are of different widths from others of the troughs.
Claim 18
Dependent Claim
66 words
A machine according to claim 1 in which troughs with the coil sides therein are arranged in a cylindrical structure in which the arcuate distance between one coil side and another, or between groups of coil sides differs around the circumference of the cylindrical structure whereby the complete stator winding can be arranged to give an armature reaction wave and generated e.m.f. of low harmonic contents.
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US2130843A
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |