US6140719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature superconducting rotor for a synchronous machine
Assignee: American Superconductor Corp
•
Filing: 1999-02-17
•
Granted: 2000-10-31
•
Expires: 2019-02-17
Abstract
Abstract A high temperature superconducting rotor for a synchronous machine includes a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconducting field winding, and a thermal reserve concentrically arranged about the field winding support. The thermal reserve includes a thermally conductive material. The material is either electrically conductive, for example, aluminum, or electrically nonconductive, for example, ceramics such as beryllium oxide or alumina. The thermal reserve material includes segmentation in a direction normal to the rotor axis, along the rotor axis, neither, or both. The rotor includes a banding concentrically arranged about the thermal reserve. The banding includes an electrically conductive material, for example, steel, an electrically nonconductive material, for example, Kevlar, or both. The rotor includes an outer layer concentrically arranged about the thermal reserve. The outer layer includes a thermally nonconductive material.
Inventors
- 👤 Swarn S Kalsi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:07
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; F; F25; F25B; F25B2500/00; F25B2500/06; Y; Y02; Y02E; Y02E40/00; Y02E40/60
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
63 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support and thermally coupled to the field winding to maintain a temperature of the thermal reserve to within about 10 K of a temperature of the field winding.
Claim 2
Dependent Claim
63 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support and thermally coupled to the field winding to maintain a temperature of the thermal reserve to within about 10 K of a temperature of the field winding.
Claim 3
Dependent Claim
16 words
The rotor of claim 1 wherein the thermal reserve comprises a material that is thermally conductive.
Claim 4
Dependent Claim
16 words
The rotor of claim 2 wherein the thermal reserve comprises a material that is electrically nonconductive.
Claim 5
Dependent Claim
13 words
The rotor of claim 3 wherein the thermal reserve comprises a ceramic material.
Claim 6
Dependent Claim
11 words
The rotor of claim 3 wherein the thermal reserve comprises Alumina.
Claim 7
Dependent Claim
12 words
The rotor of claim 3 wherein the thermal reserve comprises Beryllium Oxide.
Claim 8
Dependent Claim
14 words
The rotor of claim 2 wherein the thermal reserve comprises an electrically conductive material.
Claim 9
Dependent Claim
22 words
The rotor of claim 7 wherein the electrically conductive material includes segmentation in a direction normal to the axis of the rotor.
Claim 10
Dependent Claim
21 words
The rotor of claim 7 wherein the electrically conductive material includes segmentation in a direction along the axis of the rotor.
Claim 11
Dependent Claim
19 words
The rotor of claim 7 wherein the electrically conductive material comprises aluminum shrunk fit over the field winding support.
Claim 12
Dependent Claim
15 words
The rotor of claim 1 further comprising a banding concentrically arranged about the thermal reserve.
Claim 13
Dependent Claim
13 words
The rotor of claim 11 wherein the banding comprises an electrically conductive material.
Claim 14
Dependent Claim
22 words
The rotor of claim 12 wherein the electrically conductive material includes segmentation in a direction normal to the axis of the rotor.
Claim 15
Dependent Claim
13 words
The rotor of claim 11 wherein the banding comprises an electrically nonconductive material.
Claim 16
Dependent Claim
10 words
The rotor of claim 14 wherein the banding comprises Kevlar.
Claim 17
Dependent Claim
11 words
The rotor of claim 14 wherein the banding comprises glass fiber.
Claim 18
Dependent Claim
24 words
The rotor of claim 1 further comprising an outer layer concentrically arranged about the thermal reserve, the outer layer comprising a thermally non-conductive material.
Claim 19
Dependent Claim
14 words
The rotor of claim 17 wherein the outer layer comprises an electrically nonconductive material.
Claim 20
Dependent Claim
14 words
The rotor of claim 17 wherein the outer layer comprises an electrically conductive material.
Claim 21
Dependent Claim
24 words
The rotor of claim 19 wherein the electrically conductive material is configured to prevent the flow of eddy currents within the electrically conductive material.
Claim 22
Dependent Claim
16 words
The rotor of claim 20 wherein the outer layer comprises multiple layers of aluminum coated mylar.
Claim 23
Dependent Claim
26 words
The rotor of claim 21 wherein the aluminum coating includes segments whereby electric current does not flow in a direction along the axis of the rotor.
Claim 24
Dependent Claim
15 words
The rotor of claim 17 further comprising a banding concentrically arranged about the outer layer.
Claim 25
Dependent Claim
15 words
The high temperature superconductor rotor of claim 1 wherein the thermal reserve defines cooling channels.
Claim 26
Dependent Claim
94 words
A machine comprising: a rotor, said rotor comprising a high temperature superconducting field winding, a field winding support concentrically arranged about the field winding for securing the field winding, the support being electrically isolated from the field winding, an AC flux shield concentrically arranged about the field winding, and a thermal reserve concentrically arranged about the AC flux shield and thermally coupled to the field winding to maintain a temperature of the thermal reserve to within about 10 K of a temperature of the field winding; and a stator concentrically arranged about the rotor.
Claim 27
Dependent Claim
94 words
A machine comprising: a rotor, said rotor comprising a high temperature superconducting field winding, a field winding support concentrically arranged about the field winding for securing the field winding, the support being electrically isolated from the field winding, an AC flux shield concentrically arranged about the field winding, and a thermal reserve concentrically arranged about the AC flux shield and thermally coupled to the field winding to maintain a temperature of the thermal reserve to within about 10 K of a temperature of the field winding; and a stator concentrically arranged about the rotor.
Claim 28
Dependent Claim
16 words
The machine of claim 25 further comprising a cryogenic refrigeration system thermally coupled to the rotor.
Claim 29
Dependent Claim
12 words
The machine of claim 25 wherein the thermal reserve defines cooling channels.
Claim 30
Independent Claim
50 words
A method of limiting the rate of increase in the temperature of a superconducting winding, comprising: concentrically arranging a thermal reserve about and in thermal contact with the superconducting winding, and maintaining a temperature of the thermal reserve to within about 10 K of a temperature of the field winding.
Claim 31
Independent Claim
50 words
A method of limiting the rate of increase in the temperature of a superconducting winding, comprising: concentrically arranging a thermal reserve about and in thermal contact with the superconducting winding, and maintaining a temperature of the thermal reserve to within about 10 K of a temperature of the field winding.
Claim 32
Dependent Claim
14 words
The method of claim 28 wherein the thermal reserve comprises a thermally conducting material.
Claim 33
Dependent Claim
18 words
The method of claim 29 further comprising: concentrically arranging a thermally nonconductive material about the thermally conductive material.
Claim 34
Dependent Claim
22 words
The method of claim 28 further comprising: configuring the thermal reserve to suppress electric eddy currents from flowing about the superconducting winding.
Claim 35
Dependent Claim
50 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including a ceramic material which is thermally conductive and electrically nonconductive.
Claim 36
Dependent Claim
50 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including a ceramic material which is thermally conductive and electrically nonconductive.
Claim 37
Dependent Claim
48 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including Alumina which is thermally conductive and electrically nonconductive.
Claim 38
Dependent Claim
48 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including Alumina which is thermally conductive and electrically nonconductive.
Claim 39
Dependent Claim
49 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including Beryllium Oxide which is thermally conductive and electrically nonconductive.
Claim 40
Dependent Claim
49 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including Beryllium Oxide which is thermally conductive and electrically nonconductive.
Claim 41
Dependent Claim
56 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including aluminum shrunk fit over the field winding support which is thermally conductive and an electrically conductive.
Claim 42
Dependent Claim
56 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including aluminum shrunk fit over the field winding support which is thermally conductive and an electrically conductive.
Claim 43
Dependent Claim
51 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, a thermal reserve concentrically arranged about the field winding support, and a banding concentrically arranged about the thermal reserve, the banding including an electrically nonconductive material.
Claim 44
Dependent Claim
51 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, a thermal reserve concentrically arranged about the field winding support, and a banding concentrically arranged about the thermal reserve, the banding including an electrically nonconductive material.
Claim 45
Dependent Claim
10 words
The rotor of claim 36 wherein the banding comprises Kevlar.
Claim 46
Dependent Claim
11 words
The rotor of claim 36 wherein the banding comprises glass fiber.
Claim 47
Dependent Claim
59 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, and an outer layer concentrically arranged about the thermal reserve, the outer layer including a material which is thermally nonconductive and electrically nonconductive.
Claim 48
Dependent Claim
59 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, and an outer layer concentrically arranged about the thermal reserve, the outer layer including a material which is thermally nonconductive and electrically nonconductive.
Claim 49
Dependent Claim
80 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, and an outer layer concentrically arranged about the thermal reserve, the outer layer including multiple layers of aluminum coated mylar which is thermally non-conductive and electrically conductive, the outer layer being configured to prevent the flow of eddy currents within the electrically conductive material.
Claim 50
Dependent Claim
80 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, and an outer layer concentrically arranged about the thermal reserve, the outer layer including multiple layers of aluminum coated mylar which is thermally non-conductive and electrically conductive, the outer layer being configured to prevent the flow of eddy currents within the electrically conductive material.
Claim 51
Dependent Claim
26 words
The rotor of claim 40 wherein the aluminum coating includes segments whereby electric current does not flow in a direction along the axis of the rotor.
Claim 52
Dependent Claim
62 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, an outer layer concentrically arranged about the thermal reserve, the outer layer including a thermally nonconductive material, and a banding concentrically arranged about the outer layer.
Claim 53
Dependent Claim
62 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, an outer layer concentrically arranged about the thermal reserve, the outer layer including a thermally nonconductive material, and a banding concentrically arranged about the outer layer.
Claim 54
Independent Claim
50 words
A method of limiting the rate of increase in the temperature of a superconducting winding, comprising: concentrically arranging a thermal reserve about and in thermal contact with the superconducting winding, the thermal reserve including a thermally conducting material, and concentrically arranging a thermally nonconductive material about the thermally conductive material.
Claim 55
Independent Claim
50 words
A method of limiting the rate of increase in the temperature of a superconducting winding, comprising: concentrically arranging a thermal reserve about and in thermal contact with the superconducting winding, the thermal reserve including a thermally conducting material, and concentrically arranging a thermally nonconductive material about the thermally conductive material.
Claim 56
Dependent Claim
61 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including an electrically conductive material divided into electrically isolated segments by segmentation in a direction normal to the axis of the rotor.
Claim 57
Dependent Claim
61 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including an electrically conductive material divided into electrically isolated segments by segmentation in a direction normal to the axis of the rotor.
Claim 58
Dependent Claim
60 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including an electrically conductive material divided into electrically isolated segments by segmentation in a direction along an axis of the rotor.
Claim 59
Dependent Claim
60 words
A high temperature superconducting rotor, comprising: a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconductor field winding, and a thermal reserve concentrically arranged about the field winding support, the thermal reserve including an electrically conductive material divided into electrically isolated segments by segmentation in a direction along an axis of the rotor.
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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) | 2003-10-31 | 2004-05-01 | 2004-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-31 | 2008-05-01 | 2008-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-31 | 2012-05-01 | 2012-10-31 | $7700.00 | Window Closed / Lapsed |