Stator winding having transitions
First Claim
1. A stator for an electric machine, comprising:
- a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core;
a stator winding having a plurality of phases, each phase comprising at least a first filar and a second filar extending circumferentially around said stator core to form a plurality of layers;
each of said filars being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments,said first filar having a first set of a plurality of consecutive slot segments having at least a first and second consecutive slot segment wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core and having a second set of a plurality of consecutive slot segments having at least a third and fourth consecutive slot segment wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core;
said plurality of consecutive slot segments of said first set being disposed at substantially the same radial distance from a central axis of said stator core as said plurality of consecutive slot segments of said second set; and
said slot segments of said first and second filars of a particular phase alternating radial positions with one another within at least one discreet location around said stator core.
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0 Petitions
Accused Products
Abstract
A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of circumferentially spaced core slots. A stator winding includes a plurality of phases, each including at least a first filar and a second filar extending circumferentially around the stator core to form a plurality of layers. Each of the filars is a conductor having a plurality of slot segments disposed in the core slots. The slot segments are alternately connected at the first and second ends of the stator core by a plurality of end loop segments that may form a cascaded winding pattern. The plurality of filars of each phase alternating radial positions with one another within at least one end loop segment at discreet locations around the stator core such that the average radial position of the slot segments of the first filar conductors is substantially equal to that of the second filar.
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Citations
32 Claims
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1. A stator for an electric machine, comprising:
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a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core;
a stator winding having a plurality of phases, each phase comprising at least a first filar and a second filar extending circumferentially around said stator core to form a plurality of layers;each of said filars being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments, said first filar having a first set of a plurality of consecutive slot segments having at least a first and second consecutive slot segment wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core and having a second set of a plurality of consecutive slot segments having at least a third and fourth consecutive slot segment wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core; said plurality of consecutive slot segments of said first set being disposed at substantially the same radial distance from a central axis of said stator core as said plurality of consecutive slot segments of said second set; and said slot segments of said first and second filars of a particular phase alternating radial positions with one another within at least one discreet location around said stator core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A stator for an electric machine, comprising:
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a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core; and a stator winding having a plurality of phases, each phase comprising at least a first filar extending circumferentially around said stator core to form a plurality of layers; said first filar being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments;
a plurality of consecutive slot segments of said first filar of a particular one of said phases being disposed substantially in the innermost layer and another plurality of consecutive slot segments of said first filar being disposed substantially in a different layer;at least one end loop segment connecting said plurality of consecutive slot segments disposed in said innermost layer having a portion of the end loop segment which is at a different radial distance from the central axis of said stator core as any portion of said slot segments disposed in said innermost layer; and at least one end loop segment connecting said plurality of consecutive slot segments disposed in said different layer having a portion of the end loop segment which is at a different radial distance from the central axis of said stator core as any portion of said slot segments disposed in said different layer. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A stator for an electric machine, comprising:
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a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core; a stator winding having a wave winding configuration and having a plurality of phases, each phase comprising at least a first filar extending circumferentially around said stator core to form a plurality of layers; said first filar being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments; said first filar of a particular one of said phases having at least three consecutive slot segments being disposed in a particular layer and at least three consecutive slot segments being disposed in a different particular layer; a portion of said first filar including all of said at least three consecutive slot segments being disposed in said particular layer being formed from a single continuous conductor; a portion of said first filar including all of said at least three consecutive slot segments being disposed in said different particular layer being formed from a single continuous conductor; a plurality of end loop segments connecting a first slot segment disposed in a first particular core slot with a second slot segment disposed in a second particular core slot, wherein each end loop segment is a same layer end loop segment; each particular one of said same layer end loop segments connecting said first slot segment disposed in said first particular core slot with said second slot segment disposed in said second particular core slot, includes a portion which is located at a different radial distance from the central axis of said stator core as any portion of said slot segments which are connected to said particular one of said same layer end loop segment. - View Dependent Claims (22)
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23. A stator for an electric machine, comprising:
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a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core;
a stator winding having a wave winding configuration and having a plurality of phases, each phase comprising at least a first filar extending circumferentially around said stator core to form a plurality of layers;said first filar being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments, said first filar of a particular one of said phases having a first set of a plurality of consecutive slot segments wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core, having a second set of a plurality of consecutive slot segments wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core, and having a third set of a plurality consecutive slot segments wherein each slot segment is disposed at substantially the same radial distance from a central axis of said stator core; said plurality of consecutive slot segments of said first set being disposed at substantially the same radial distance from a central axis of said stator core as said plurality of consecutive slot segments of said third set; said plurality of consecutive slot segments of said second set being disposed at substantially a different radial distance from a central axis of said stator core as said plurality of consecutive slot segments of said first set; and
said second set being located in between said first set and said third set.
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24. A stator for an electric machine, comprising:
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a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core; a stator winding having a plurality of phases, each phase comprising at least a first filar extending circumferentially around said stator core to form a plurality of layers; said first filar being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments; said first filar of a particular one of said phases having a plurality of consecutive slot segments being disposed in a particular layer and a plurality of consecutive slot segments being disposed in a different particular layer; a plurality of end loop segments connecting a first slot segment disposed in a first particular core slot with a second slot segment disposed in a second particular core slot, wherein each end loop segment is a same layer end loop segment; a particular one of said same layer end loop segment connecting said first slot segment disposed in said first particular core slot with said second slot segment disposed in said second particular core slot, includes a portion which is located at a different radial distance from the central axis of said stator core as any portion of said first and said second slot segments; and at least one of said same layer end loop segment connecting said first slot segment disposed in said first particular core slot with said second slot segment disposed in said second particular core slot, is located on a first end of the stator core and at least one of said same layer end loop segment connecting said first slot segment disposed in said first particular core slot with said second slot segment disposed in said second particular core slot, is located on a second end of the stator core. - View Dependent Claims (25, 26, 27)
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28. A stator for an electric machine, comprising:
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a generally cylindrically-shaped stator core having a plurality of circumferentially spaced and axially-extending core slots in a surface thereof, said core slots extending between a first and a second end of said stator core; a stator winding having a plurality of phases, each phase comprising at least a first filar extending circumferentially around said stator core to form a plurality of layers; said first filar being a conductor having a plurality of slot segments disposed in said core slots, said slot segments alternately connected at said first and second ends of said stator core by a plurality of end loop segments; said first filar of a particular one of said phases having a plurality of consecutive slot segments being disposed in a particular layer and a plurality of consecutive slot segments being disposed in a different particular layer; a plurality of end loop segments connecting a first slot segment disposed in a first particular core slot with a second slot segment disposed in a second particular core slot, wherein each end loop segment is a same layer end loop segment; and at least one of said same layer end loop segment connecting said first slot segment disposed in said first particular core slot with said second slot segment disposed in said second particular core slot, includes at least one sloped portion. - View Dependent Claims (29, 30, 31, 32)
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Specification