US3860744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated conductor bar structure for stator winding of high-voltage dynamo-electric machine
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1973-06-13
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Granted: 1975-01-14
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Expires: 1993-06-13
Abstract
Abstract A conductor bar structure for forming the stator winding of a high-voltage dynamo-electric machine comprises at least one stack of bar type bare conductors which have an elongated rectangular transverse profile and which is enclosed within a sheath of insulating material. To facilitate penetration of an impregnating resin into the stacked conductor bar structure longitudinally extending flow channels are provided between the narrow sides of the conductor bars and the insulating sheath. These channels can be established by profiling the narrow sides of the conductor bars such as in a concave or convex manner of a combination of both, or by use of conductor bars having dissimilar widths. One or more of the conductor bars may also be made in tubular form and provided with longitudinally spaced apertures through the narrow side thereof facing the insulating sheath for introduction of the impregnating resin.
Inventors
- 👤 Roland H Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:04
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/34
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
In a conductor bar structure for forming the stator winding of a high-voltage dynamo-electric machine which comprises at least one stack of contiguous bar type bare conductors, each conductor of the stack having an elongated essentially rectangular cross-section and which is enclosed within a sheath of insulating material, the improvement wherein the narrow sides of said conductor bars profiled to establish longitudinally extending flow channels between the narrow sides of said conductor bars and the surface of said insulating sheath to facilitate penetration of an impregnating resin.
Claim 2
Dependent Claim
87 words
In a conductor bar structure for forming the stator winding of a high-voltage dynamo-electric machine which comprises at least one stack of contiguous bar type bare conductors, each conductor of the stack having an elongated essentially rectangular cross-section and which is enclosed within a sheath of insulating material, the improvement wherein the narrow sides of said conductor bars profiled to establish longitudinally extending flow channels between the narrow sides of said conductor bars and the surface of said insulating sheath to facilitate penetration of an impregnating resin.
Claim 3
Dependent Claim
21 words
A conductor bar structure as defined in claim 1 wherein the narrow sides of said conductor bars have a convex profile.
Claim 4
Dependent Claim
21 words
A conductor bar structure as defined in claim 1 wherein the narrow sides of said conductor bars have a concave profile.
Claim 5
Dependent Claim
55 words
A conductor bar structure as defined in claim 1 which comprises two stacks of bars arranged in side-by-side relation with an insulation barrier therebetween, and wherein said longitudinally extending channels between the narrow sides of said conductor bars and said insulating sheath are established by profiling the opposite narrow sides of each said conductor bar.
Claim 6
Dependent Claim
22 words
A conductor bar structure as defined in claim 4 wherein the opposite narrow sides of said conductor bar have a convex profile.
Claim 7
Dependent Claim
45 words
A conductor bar structure as defined in claim 4 wherein the opposite narrow sides of some of said conductor bars have a convex profile and wherein the opposite narrow sides of other conductor bars disposed adjacent bars with the convex profile have a concave profile.
Claim 8
Dependent Claim
36 words
A conductor bar structure as defined in claim 6 wherein each conductor bar in the stack having opposite narrow sides profiled concavely is located between two other conductor bars whose opposite narrow sides are profiled convexly.
Claim 9
Dependent Claim
85 words
In a conductor bar structure for forming the stator winding of a high-voltage dynamo-electric machine which comprises at least one stack of contiguous bar type bare conductors, each conductor of the stack having an elongated essentially rectangular cross-section and which is enclosed within a sheath of insulating material, the improvement wherein longitudinally extending channels between the narrow sides of said conductor bars and the surface of said insulating sheath are established by conductor bars having dissimilar widths thereby to facilitate penetration of an impregnating resin.
Claim 10
Dependent Claim
85 words
In a conductor bar structure for forming the stator winding of a high-voltage dynamo-electric machine which comprises at least one stack of contiguous bar type bare conductors, each conductor of the stack having an elongated essentially rectangular cross-section and which is enclosed within a sheath of insulating material, the improvement wherein longitudinally extending channels between the narrow sides of said conductor bars and the surface of said insulating sheath are established by conductor bars having dissimilar widths thereby to facilitate penetration of an impregnating resin.
Claim 11
Dependent Claim
19 words
A conductor bar structure as defined in claim 8 Wherein conductor bars of different width alternate in the stack.
Claim 12
Dependent Claim
101 words
A conductor bar structure as defined in claim 8 which comprises two stacks of bars arranged in side-by-side relation with an insulation barrier therebetween, and wherein said longitudinally extending channels between the narrow sides of said conductor bars and said insulating sheath are established by conductor bars of dissimilar width in each stack, the narrower bars being located between the wider bars and having one narrow side thereof in contact with said insulation barrier, said wider bars likewise having one narrow side thereof in contact with said insulation barrier and the opposite narrow side thereof in contact with said insulating sheath.
Claim 13
Dependent Claim
22 words
A conductor bar structure as defined in claim 10 wherein the narrow sides of all of said conductor bars are profiled convexly.
Claim 14
Dependent Claim
37 words
A conductor bar structure as defined in claim 1 wherein at least some conductor bars are tubular and provided with longitudinally spaced apertures extending through the narrow side thereof facing the inner surface of said insulating sheath.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |