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US3777190A
Expired / Lapsed
US
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Superposed-strip field winding for rotary electric machines
Assignee: Individual
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Filing: 1971-09-22
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Granted: 1973-12-04
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Expires: 1991-09-22
Abstract
Abstract Channels for the circulation of cooling fluid are provided in field windings for rotary electrical machines by superposing conducting strips having edge portions arranged to form the cooling channels. In one form, the channels are formed by laterally offsetting alternate strips or groups of strips. In another form the channels are formed by alternate strips or groups of strips of different width. In still another form, edge portions of strips are of reduced thickness to provide the channels. Gaps between successive coils are kept uniform despite curvature of the rotor by varying the width of the strips.
Inventors
- 👤 J Guimbal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:40
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/52; H02K3/527; H02K3/04; H02K3/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
Field winding for rotary electric machines, secured to a magnetic circuit, comprising superposed conductive strips disposed extending axially of the winding, fastening members for securing said winding to said magnetic circuit said conductive strips being wider and narrower defining longitudinal channels formed in the side surfaces of the coils consisting of said conducting strips for circulating a cooling gas in the axial direction between said strips, and the marginal portions of the conductive strips are thinned out in order to form said channels therebetween.
Claim 2
Dependent Claim
84 words
Field winding for rotary electric machines, secured to a magnetic circuit, comprising superposed conductive strips disposed extending axially of the winding, fastening members for securing said winding to said magnetic circuit said conductive strips being wider and narrower defining longitudinal channels formed in the side surfaces of the coils consisting of said conducting strips for circulating a cooling gas in the axial direction between said strips, and the marginal portions of the conductive strips are thinned out in order to form said channels therebetween.
Claim 3
Dependent Claim
98 words
In combination, a rotor for a rotary electrical machine having longitudinal grooves circumferentially spaced on the rotor, a plurality of field windings mounted on said rotor, each field winding comprising coils comprising superposed conductive strips extending longitudinally of said rotor, said conductive strips being alternately wider and narrower defining longitudinal channels along the side surfaces of the coils for circulating a cooling gas in an axial direction therein between the windings, means securing said windings on said rotor, and said means securing said windings on said rotor comprising an extenral magnetic shell clamping said strips on said rotor.
Claim 4
Dependent Claim
98 words
In combination, a rotor for a rotary electrical machine having longitudinal grooves circumferentially spaced on the rotor, a plurality of field windings mounted on said rotor, each field winding comprising coils comprising superposed conductive strips extending longitudinally of said rotor, said conductive strips being alternately wider and narrower defining longitudinal channels along the side surfaces of the coils for circulating a cooling gas in an axial direction therein between the windings, means securing said windings on said rotor, and said means securing said windings on said rotor comprising an extenral magnetic shell clamping said strips on said rotor.
Claim 5
Dependent Claim
107 words
In combination, a rotor for a rotary electrical machine having longitudinal grooves circumferentially spaced on the rotor, a plurality of field windings mounted on said rotor, each field winding comprising coils comprising superposed conductive strips extending longitudinally of said rotor, said conductive strips being alternately wider and narrower defining longitudinal channels along the side surfaces of the coils for circulating a cooling gas in an axial direction therein between the windings, means securing said windings on said rotor, said means securing said windings on said rotor comprising for each winding a polepiece, and said polepiece having pole horns clamping the strips on the periphery of said rotor.
Claim 6
Dependent Claim
107 words
In combination, a rotor for a rotary electrical machine having longitudinal grooves circumferentially spaced on the rotor, a plurality of field windings mounted on said rotor, each field winding comprising coils comprising superposed conductive strips extending longitudinally of said rotor, said conductive strips being alternately wider and narrower defining longitudinal channels along the side surfaces of the coils for circulating a cooling gas in an axial direction therein between the windings, means securing said windings on said rotor, said means securing said windings on said rotor comprising for each winding a polepiece, and said polepiece having pole horns clamping the strips on the periphery of said rotor.
Claim 7
Dependent Claim
92 words
In combination, a rotor for a rotary electrical machine having longitudinal grooves circumferentially spaced on the rotor, a plurality of field windings mounted on said rotor, each field winding comprising coils comprising superposed conductive strips extending longitudinally of said rotor, said conductive strips being alternately wider and narrower defining longitudinal channels along the side surfaces of the coils for circulating a cooling gas in an axial direction therein between the windings, means securing said windings on said rotor, and said strips having side marginal portions narrowing in width toward the edges thereof.
Claim 8
Dependent Claim
92 words
In combination, a rotor for a rotary electrical machine having longitudinal grooves circumferentially spaced on the rotor, a plurality of field windings mounted on said rotor, each field winding comprising coils comprising superposed conductive strips extending longitudinally of said rotor, said conductive strips being alternately wider and narrower defining longitudinal channels along the side surfaces of the coils for circulating a cooling gas in an axial direction therein between the windings, means securing said windings on said rotor, and said strips having side marginal portions narrowing in width toward the edges thereof.
Claim 9
Dependent Claim
80 words
Field winding for rotray electric machines, secured to a magnetic circuit, comprising superposed conductive strips disposed extending axially on the winding, fastening members for securing said winding to said magnetic circuit, said conductive strips being wider and narrower defining longitudinal channels formed in the side surfaces of the coils consisting of said conducting strips for circulating a cooling gas in the axial direction betWeen said strips, and the marginal portions of said conductive strips which form said channels are bevelled.
Claim 10
Dependent Claim
80 words
Field winding for rotray electric machines, secured to a magnetic circuit, comprising superposed conductive strips disposed extending axially on the winding, fastening members for securing said winding to said magnetic circuit, said conductive strips being wider and narrower defining longitudinal channels formed in the side surfaces of the coils consisting of said conducting strips for circulating a cooling gas in the axial direction betWeen said strips, and the marginal portions of said conductive strips which form said channels are bevelled.
Claim 11
Dependent Claim
88 words
Field winding for a rotary electric machine comprising means defining a magnetic circuit, coils in the winding comprising a plurality of superposed, conductive, flat strips of one equal dimension relative to a longitudinal axis of the winding, said strips being alternately offset in opposite directions relative to the longitudinal axis in the direction of said dimension, whereby said strips define air flow channels on opposite sides of said longitudinal axis offset in an axial direction one side of the axis relative to an opposite side of the axis.
Claim 12
Dependent Claim
88 words
Field winding for a rotary electric machine comprising means defining a magnetic circuit, coils in the winding comprising a plurality of superposed, conductive, flat strips of one equal dimension relative to a longitudinal axis of the winding, said strips being alternately offset in opposite directions relative to the longitudinal axis in the direction of said dimension, whereby said strips define air flow channels on opposite sides of said longitudinal axis offset in an axial direction one side of the axis relative to an opposite side of the axis.
Claim 13
Dependent Claim
24 words
Field winding according to claim 6, in which the flat strips are an offset equal amount on opposite directions relative to the longitudinal axis.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |