US3683220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for an electrical machine
Assignee: Individual
•
Filing: 1971-01-08
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Granted: 1972-08-08
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Expires: 1991-01-08
Abstract
Abstract The present invention relates to electrical machines, and more specifically to rotors with dampers for turbo-alternators. The invention resides in that in an electrical-machine rotor the dampers are made of a high-conductance material, electrically connected to the rotor core, have teeth of the same shape as the teeth on the rotor core and located in radial annular grooves which are deeper than the slots for the field winding.
Inventors
- 👤 Boris Leonidovich Konovalov
- 👤 Vasily Semenovich Kildishev
- 👤 Vadim Borisovich Kaplunov
- 👤 Vladimir Ivanovich Tokarev
- 👤 Boris Volkovich Spivak
- 👤 Boris Ilich Byaly
- 👤 Alexandr Abramovic Chigirinsky
- 👤 Evgeny Khaimovich Glider
- 👤 Oleg Borisovich Gradov
- 👤 David Bentsionovich Karpman
- 👤 Pavel Yakovlevich Kartashevsky
- 👤 Ivan Yakovlevich Cheremisov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:44
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/12; H02K3/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
An electrical-machine rotor, particularly for a turboalternator or the like, comprising: a core having slots, said core further having annular grooves in the end face portion thereof; a field winding located in the slots of said core; annular dampers made of a high-conDuctance material and having cut-outs in the form of slots, said dampers being located in said annular grooves; said damper being formed of a plurality of segments wedge-shaped in transverse cross-section and widening in the direction towards the inner diameter thereof, and locking wedges retaining said segments against the walls of said groove while electrically interconnecting said segments.
Claim 2
Dependent Claim
100 words
An electrical-machine rotor, particularly for a turboalternator or the like, comprising: a core having slots, said core further having annular grooves in the end face portion thereof; a field winding located in the slots of said core; annular dampers made of a high-conDuctance material and having cut-outs in the form of slots, said dampers being located in said annular grooves; said damper being formed of a plurality of segments wedge-shaped in transverse cross-section and widening in the direction towards the inner diameter thereof, and locking wedges retaining said segments against the walls of said groove while electrically interconnecting said segments.
Claim 3
Dependent Claim
104 words
An electrical-machine rotor, particularly for a turbo-alternator or the like, comprising: a core having slots; a field winding located in the slots of said core; annular dampers made of a high-conductance material and having cut-outs in the form of the slots of the rotor core to accommodate the field winding, an annular slot receiving said dampers, said dampers being electrically associated with the rotor core, said annular groove for the damper being formed by the end face of the rotor core, and a ring permanently mounted on the rotor shaft and having teeth of the same shape as the teeth of the rotor core.
Claim 4
Dependent Claim
104 words
An electrical-machine rotor, particularly for a turbo-alternator or the like, comprising: a core having slots; a field winding located in the slots of said core; annular dampers made of a high-conductance material and having cut-outs in the form of the slots of the rotor core to accommodate the field winding, an annular slot receiving said dampers, said dampers being electrically associated with the rotor core, said annular groove for the damper being formed by the end face of the rotor core, and a ring permanently mounted on the rotor shaft and having teeth of the same shape as the teeth of the rotor core.
Claim 5
Dependent Claim
18 words
An electrical-machine rotor as claimed in claim 2, wherein the annular groove for said damper has unparallel walls.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |