Patent US3644859A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3644859A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrical winding of sheet conductor

Assignee: Allis Chalmers Corp
•
Filing: 1970-08-17
•
Granted: 1972-02-22
•
Expires: 1990-08-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A high-current capacity winding of sheet conductor for stationary induction apparatus which substantially reduces eddy current and circulating current losses has a plurality of coaxial coils each of which is spirally wound from a plurality of conductor sheets in parallel that extend the entire coil height with insulation between paralleled sheets and between spiral turns. Crossover connector strips extending parallel to the winding axis connect paralleled conductor sheets in the plurality of coils in series relation and so that the innermost and outermost of the paralleled conductor sheets of different coils are transposed and the net flux linkages of the plurality of flux paths are approximately equal.

Inventors

  • 👤 Michael W Waterman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 07:34
CPC Classifications
H; H01; H01F; H01F37/00; H01F37/005; H01F27/00; H01F27/28; H01F27/2847; H01F27/2852; H01F30/00; H01F30/06; H01F30/08

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 272 words
A shunt reactor winding having high-current capacity comprising, in combination, a plurality of superimposed coaxial coils each of which is spirally wound from a plurality of conductor sheets in parallel terminating together at their radially outer ends and which terminate at their radially inner ends in a common radial plane and which sheets extend substantially the entire axial height of said coil, insulation between paralleled conductor sheets in each coil and between the spiral turns of paralleled sheets, a START terminal on one of said coils electrically connecting said radially outer ends of the paralleled sheets of said one coil together and a FINISH terminal on another of said coils electrically connecting said radially outer ends of the paralleled sheets of said another of said coils together, said plurality of coils being wound so that the direction of magnetic flux is the same in all of said coils, and means including a plurality of elongated flat crossover connector strips disposed in a common radial plane extending betWeen adjacent coils at the radially inner coil periphery in a direction parallel to the coil axis and joining oppositely disposed radially inner conductor sheet ends in said adjacent coils for electrically connecting said paralleled sheets in said plurality of coils in series relation, the radially inner ends of certain of said conductor sheets in one of said adjacent coils being offset in a radial direction and joined to crossover connector strips affixed to conductor sheets occupying different radial positions in said adjacent coil so that the net flux linkages of the plurality of conductor paths formed by said series connected conductor sheets are approximately equal.
Claim 2
Dependent Claim 272 words
A shunt reactor winding having high-current capacity comprising, in combination, a plurality of superimposed coaxial coils each of which is spirally wound from a plurality of conductor sheets in parallel terminating together at their radially outer ends and which terminate at their radially inner ends in a common radial plane and which sheets extend substantially the entire axial height of said coil, insulation between paralleled conductor sheets in each coil and between the spiral turns of paralleled sheets, a START terminal on one of said coils electrically connecting said radially outer ends of the paralleled sheets of said one coil together and a FINISH terminal on another of said coils electrically connecting said radially outer ends of the paralleled sheets of said another of said coils together, said plurality of coils being wound so that the direction of magnetic flux is the same in all of said coils, and means including a plurality of elongated flat crossover connector strips disposed in a common radial plane extending betWeen adjacent coils at the radially inner coil periphery in a direction parallel to the coil axis and joining oppositely disposed radially inner conductor sheet ends in said adjacent coils for electrically connecting said paralleled sheets in said plurality of coils in series relation, the radially inner ends of certain of said conductor sheets in one of said adjacent coils being offset in a radial direction and joined to crossover connector strips affixed to conductor sheets occupying different radial positions in said adjacent coil so that the net flux linkages of the plurality of conductor paths formed by said series connected conductor sheets are approximately equal.
Claim 3
Dependent Claim 57 words
An electrical winding in accordance with claim 1 wherein the radially inner end of the radially inner conductor sheet in said one coil is bent in U-shape to a different radial position so that it is joined to a conductor strip affixed to the radially inner end of the radially outer conductor sheet of said adjacent coil.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-02-21 1975-08-23 1976-02-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-02-21 1979-08-23 1980-02-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-02-21 1983-08-23 1984-02-22 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag