US3761752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine winding support
Assignee: JOHN THOMPSON (PIPEWORK AND ORDNANCE DIVISION) Ltd
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Filing: 1972-05-01
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Granted: 1973-09-25
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Expires: 1992-05-01
Abstract
Abstract A multi-phase stationary winding for an alternating current dynamo-electric machine, either of the type having a superconducting rotor winding or the air-gap winding iron-core type, is provided in which the conductors of the winding are helically disposed on a support structure so as to provide adequate mechanical support for the winding and reduce or obviate the problems of end winding support met in conventional alternating current machines of a similar nature.
Inventors
- 👤 Anderson A Faithfull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:30
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; H02K3/00; Y; Y02; Y02E; Y02E40/00; Y02E40/60
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
183 words
In an alternating current dynamo-electric machine having a rotor and a stationary alternating current winding, the improvement comprising: a non-magnetic hollow cylindrical support structure for said winding coaxial with said rotor, said winding including at least one pair of coaxial cylindrical layers of conductors carried by said support structure, each conductor having at least one section of helical formation, each conductor of a layer having the same spatial relationship to the other conductors of the winding and all the conductors of each layer being at the same radius from the axis of the rotor substantially throughout the lengths of the conductors, and end connections between the ends of the conductors of a first layer of the pair and the ends of the conductors of the second layer of the pair forming turns of the winding each of which turns comprises at least one conductor of the first layer connected in series with at least one conductor of the second layer, each end connection extending substantially radially between a conductor end of the first layer and an adjacent conductor end of the second layer.
Claim 2
Dependent Claim
183 words
In an alternating current dynamo-electric machine having a rotor and a stationary alternating current winding, the improvement comprising: a non-magnetic hollow cylindrical support structure for said winding coaxial with said rotor, said winding including at least one pair of coaxial cylindrical layers of conductors carried by said support structure, each conductor having at least one section of helical formation, each conductor of a layer having the same spatial relationship to the other conductors of the winding and all the conductors of each layer being at the same radius from the axis of the rotor substantially throughout the lengths of the conductors, and end connections between the ends of the conductors of a first layer of the pair and the ends of the conductors of the second layer of the pair forming turns of the winding each of which turns comprises at least one conductor of the first layer connected in series with at least one conductor of the second layer, each end connection extending substantially radially between a conductor end of the first layer and an adjacent conductor end of the second layer.
Claim 3
Dependent Claim
42 words
In a machine as claimed in claim 1, each conductor comprising a single helical section extending from end to end of the winding, the helical sections of the first layer being of opposite sense to the helical sections of the second layer.
Claim 4
Dependent Claim
58 words
In a machine as claimed in claim 1, each conductor of each layer comprising a first and second helical section of equal length and opposite sense, the first and second sections of the conductors of the second layer overlying and being of opposite sense to the first and second sections, respectively, of the conductors of the first layer.
Claim 5
Dependent Claim
101 words
In a machine as claimed in claim 1, the rotor having a magnetic field with an integral number of pole pairs, the stationary winding being a multi-phase winding having a set of two electrically-connected coils for each phase, each turn of each coil of a set comprising a conductor of the first layer in series with a conductor of the second layer, the conductors of the two layers having equal helix angles, and the center of each conductor being circumferentially displaced from the end of the said conductor by approximately pi /2 electrical radians in respect of the said rotor field.
Claim 6
Dependent Claim
53 words
In a machine as claimed in claim 1 the rotor having a magnetic field with an integral number of pole pairs, the stationary winding being a multiphase winding having two-electrically-connected phase bands displaced relative to each other around the circumference of the winding by approximately pi radians in respect of the rotor field.
Claim 7
Dependent Claim
31 words
In a machine as claimed in claim 1, the hollow cylindrical support structure is provided with helical passages through the wall of the structure in which passages the conductors are retained.
Claim 8
Dependent Claim
51 words
In a machine as claimed in claim 1, the hollow cylindrical support structure being composed of a plurality of elemental rings, each of which has, for each layer of conductors, a circle of inclined holes, the holes in successive rings being in alignment whereby helical passages are formed through the assembly.
Claim 9
Dependent Claim
27 words
In a machine as claimed in claim 1, the hollow cylindrical support structure being composed of at least two concentric hollow cylinders juxtapose one about the other.
Claim 10
Dependent Claim
39 words
In a machine as claimed in claim 1, the hollow cylindrical support structure being composed of at least two concentric hollow cylinders juxtaposed one about the other, at least one of the cylinders having helical passages through its wall.
Claim 11
Dependent Claim
77 words
In a machine as cLaimed in claim 1, the hollow cylindrical support structure being composed of at least two concentric hollow cylinders juxtaposed one about the other, at least one of the cylinders comprising a plurality of elemental rings and each ring comprising a plurality of segments, adjacent segments in the axial direction of adjoining rings being staggered circumferentially whereby a helically extending stack of segments extends from each segment of an end ring of the assembly.
Claim 12
Dependent Claim
77 words
In a machine as claimed in claim 1, the hollow cylindrical support structure being composed of at least two concentric hollow cylinders juxtaposed one about the other, the curved surface of at least one cylinder having helically disposed grooves whereby helical passages through the structure are formed, the surrounding walls of which passages are formed by the wall, or walls, of each groove in combination with the adjacent curve surface of a cylinder adjoining the groove surface.
Claim 13
Dependent Claim
16 words
In a machine as claimed in claim 1, said rotor carrying a superconducting rotor field winding.
Claim 14
Dependent Claim
36 words
In a machine as claimed in claim 12, the axial length of the stationary winding being substantially greater than that of the rotor winding and the stationary winding extending beyond both ends of the rotor winding.
Claim 15
Dependent Claim
42 words
In a machine as claimed in claim 1, said rotor having an iron core, a stator of magnetic material surrounding said rotor, and a cylindrical air-gap region between said stator and said rotor, said stationary winding being located in said air-gap region.
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |