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US 5,304,883 AGranted
Ring wound stator having variable cross section conductors
AssigneeAlliedSignal Inc.
InventorJoseph Denk
Life of this patent
Estimating the term…
Abstract
Flux density in the air gap of an electrical machine is increased by varying the cross sectional area of conductors wound on the stator. Conductors of smaller cross sectional area are located within the air gap and conductors of larger cross sectional area are located outside the air gap. Because the smaller conductor allows the air gap to be reduced, air gap flux density is increased.
Claims28
An electrical machine, comprising:
- magnet means for providing magnetic flux;
- flux collector means for providing a flux return path for said magnetic flux, said magnet means and flux collector means defining a magnetic air gap therebetween;
- and
- windings around said flux collector means, a first portion of said windings being located within said magnetic air gap, and a second portion of said windings being located outside said magnetic air gap, said windings of said first portion having a smaller cross-sectional area than said windings of said second portion.
1 more element
An electrical machine, comprising:
- a magnet;
- a flux collector ring encircling said magnet, opposing surfaces of said flux collector ring and said magnet defining a magnetic air gap;
- and
- windings that are toroidally wound around said flux collector ring, a first portion of said windings being located within said magnetic air gap, and a second portion of said windings being located outside said magnetic air gap, said windings of said first portion having a smaller cross-sectional area than said windings of said second portion.
1 more element
An electrical machine, comprising a housing;
- a rotor, journalled for rotation within said housing, including a two pole permanent magnet;
- and a stator including:
- a flux collector ring encircling said magnet, opposing surfaces of said flux collector ring and said magnet defining a magnetic air gap;
- and
- windings that are toroidally wound around said flux collector ring, said windings including a single layer of high current density conductors located within said magnetic air gap and low current density conductors connected between said high current density conductors, said high current density conductors having a smaller cross-sectional area than said low current density conductors.
2 more elements
A ring wound stator, comprising:
- a flux return ring having an inner surface and an outer surface;
- and
- electrical windings toroidally wound around said ring, a first portion of said windings being in communication with said inner surface, a second portion of said windings being in communication with said outer surface, said windings of said first portion having a smaller cross-sectional area than said windings of said second portion.
Dependencies are inferred from the claim text.