US4063122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor containing a field winding cooled to a low temperature
Assignee: Siemens AG
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Filing: 1975-04-10
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Granted: 1977-12-13
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Expires: 1995-04-10
Abstract
Abstract An improved rotor for an electric machine, particularly for a synchronous machine, comprising a field winding cooled to a low temperature in which the rotor includes a concentric, hollow, cylindrical support body having internal slots on its inside for accommodating the field winding so that the winding can be placed in the slots in a simple manner and the windings retained more securely therein.
Inventors
- 👤 Dieter Kullmann
- 👤 Lutz Intichar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877; Y10S505/878
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A rotor for an electric machine such as a synchronous machine containing a field winding which is cooled to a low temperature comprising: a. an inner cylinder made of a non-magnetic material; b. a hollow cylindrical support body made of a non-magnetic material containing on its inside a plurality of internal slots, said cylindrical support body concentrically surrounding and being in close contact with said inner cylinder; c. a plurality of field windings disposed in the slots of said support body; d. means at each end of said rotor defining a pressure tight space between said inner cylinder and said support body which spaces are in communication with said internal slots; and e. means for supplying a cooling medium to the space at one end of said rotor and means for removing cooling medium at low temperature from the space at the other end of said rotor whereby said cooling medium will be conducted from one end of said rotor to an other end of said rotor past said field windings.
Claim 2
Dependent Claim
171 words
A rotor for an electric machine such as a synchronous machine containing a field winding which is cooled to a low temperature comprising: a. an inner cylinder made of a non-magnetic material; b. a hollow cylindrical support body made of a non-magnetic material containing on its inside a plurality of internal slots, said cylindrical support body concentrically surrounding and being in close contact with said inner cylinder; c. a plurality of field windings disposed in the slots of said support body; d. means at each end of said rotor defining a pressure tight space between said inner cylinder and said support body which spaces are in communication with said internal slots; and e. means for supplying a cooling medium to the space at one end of said rotor and means for removing cooling medium at low temperature from the space at the other end of said rotor whereby said cooling medium will be conducted from one end of said rotor to an other end of said rotor past said field windings.
Claim 3
Dependent Claim
20 words
A rotor according to claim 1 wherein said support body comprises at least two partial shells of approximately equal size.
Claim 4
Dependent Claim
20 words
A rotor according to claim 1 wherein said field windings conductors which consist at least in part of superconductive material.
Claim 5
Dependent Claim
24 words
A rotor according to claim 1 and further including an outer concentric to said support body and coupled thereto in a force transmitting manner.
Claim 6
Dependent Claim
25 words
A rotor according to claim 1 and further including an outer cylinder concentric to said support body and coupled thereto in a force transmitting manner.
Claim 7
Dependent Claim
30 words
A rotor according to claim 1 wherein said internal slots on said support body are arranged on the inside thereof at a regular spacing and have an approximately rectangular cross-section.
Claim 8
Dependent Claim
44 words
A rotor according to claim 1 and further including an outer cylinder made of an non-magnetic material concentrically surrounding said support body and coupled thereto in a force transmitting manner and wherein said spaces are defined between said outer cylinder and said inner cylinder.
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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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |