US4987674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a dynamoelectric machine with superconducting magnet rotor
Assignee: Honeywell International Inc
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Filing: 1989-09-01
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Granted: 1991-01-29
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Expires: 2009-09-01
Abstract
Abstract A dynamoelectric machine having a superconducting magnet rotor and a method of magnetizing the superconducting magnet rotor. The superconducting magnet rotor provides a very strong magnetic field, potentially exceeding the field strength of high energy product permanent magnets.
Inventors
- 👤 Joseph Denk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:00
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/47; H02K11/00; H02K11/01; H02K11/014; H02K11/0141; H02K15/00; H02K15/02; H02K15/03; 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; Y10S505/917; Y10S505/924; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T29/49014
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A method of magnetizing a superconducting rotor for a dynamoelectric machine comprising the steps of: providing a rotor assembly having a superconductor contained within a non-magnetic, high strength retaining sleeve; installing said rotor assembly within said stator assembly whereby said stator winding is disposed about said rotor assembly; securing said rotor assembly with respect to said stator assembly in a fixed angular position; energizing one of said stator windings with a direct current to produce a magnetic field permeating said rotor assembly; cooling said rotor assembly including said superconductor to a temperature below the critical temperature of said superconductor simultaneously with said energizing step to freeze said magnetic field therein; de-energizing said stator winding; and releasing the angular position of said rotor assembly with respect to said rotor assembly.
Claim 2
Independent Claim
129 words
A method of magnetizing a superconducting rotor for a dynamoelectric machine comprising the steps of: providing a rotor assembly having a superconductor contained within a non-magnetic, high strength retaining sleeve; installing said rotor assembly within said stator assembly whereby said stator winding is disposed about said rotor assembly; securing said rotor assembly with respect to said stator assembly in a fixed angular position; energizing one of said stator windings with a direct current to produce a magnetic field permeating said rotor assembly; cooling said rotor assembly including said superconductor to a temperature below the critical temperature of said superconductor simultaneously with said energizing step to freeze said magnetic field therein; de-energizing said stator winding; and releasing the angular position of said rotor assembly with respect to said rotor assembly.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said providing step further comprises: forming a superconducting material into the shape of a solid cylinder; and mounting said cylindrical superconductor within a cylindrical retaining sleeve of high strength, nonmagnetic material.
Claim 4
Dependent Claim
23 words
The method of claim 1, wherein said cooling step further comprises: circulating a refrigerant through said stator assembly to cool said rotor assembly.
Claim 5
Dependent Claim
38 words
The method of claim 1, wherein the step of providing said stator assembly further comprises: designing said stator assembly to include a refrigerant inlet, a refrigerant outlet, and a pressure chamber within which the stator windings are mounted.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein said cooling step further comprise: circulating a refrigerant through said stator assembly.
Claim 7
Dependent Claim
25 words
The method of claim 1, wherein the step of providing said stator assembly further comprises: forming said at least one stator winding from superconducting material.
Claim 8
Dependent Claim
33 words
The method of claim 6, further comprising: cooling said at least one superconducting stator winding to a temperature below the superconductor critical temperature prior to energizing said stator winding with a direct current.
Claim 9
Dependent Claim
31 words
The method of claim 1, wherein the step of providing said stator assembly further comprises: mounting a superconducting flux shield about said at least one stator winding within said stator assembly.
Claim 10
Dependent Claim
30 words
The method of claim 6, further comprising: cooling said superconducting flux shield to a temperature below the superconductor critical temperature prior to energizing said stator winding with a direct current.
Claim 11
Dependent Claim
74 words
The method of claim 1, wherein the step of providing said stator assembly further comprises: forming said at least one stator winding from superconducting material; mounting a superconducting flux shield about said at least one superconducting stator winding within said stator assembly; and cooling said at least one superconducting stator winding and said superconducting flux shield to a temperature below the superconductor critical temperature prior to energizing said stator winding with a direct current.
References Cited (Backward Citations)
US4176291A
Cited
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