ROTOR FOR ELECTRIC MACHINE HAVING A SLEEVE WITH SEGMENTED LAYERS
6 Assignments
0 Petitions
Accused Products
Abstract
A rotor for an electrical machine includes an elongate rotor core assembly comprising a rotor core and a plurality of permanent magnets arranged in a plurality of rings around the rotor core. A composite sleeve resides around the rotor core assembly. The sleeve includes a primarily axially-oriented outer layer and an intermediate layer beneath the outer layer. The intermediate layer includes a circumferential band of composite material positioned orthogonal to a longitudinal axis of the rotor core assembly.
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Citations
39 Claims
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1-20. -20. (canceled)
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21. A rotor for an electrical machine comprising:
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an elongate rotor core assembly adapted to rotate, during operation, around a central longitudinal axis, wherein the assembly has an outer surface; a composite sleeve covering at least a portion of the rotor core assembly, the sleeve comprising; a first layer of fiber-reinforced composite having a greater density of axially-oriented fibers than fibers of another orientation; and at least one intermediate layer of fiber-reinforced composite having a greater density of fibers oriented substantially orthogonal to the longitudinal axis than fibers of another orientation, wherein the at least one intermediate layer is between the first layer and the outer surface of the rotor core assembly. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A composite sleeve adapted to cover a portion of an elongate rotor of an electrical machine having an outer surface, the sleeve comprising:
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an outer layer of fiber-reinforced composite having a greater density of longitudinally-oriented fibers than fibers of another orientation; and at least one inner layer of fiber-reinforced composite having a greater density of latitudinally-oriented fibers than fibers of another orientation, wherein the inner layer is between the outer surface of the rotor and the outer layer. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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37. A method for retaining elements of an elongate electric machine rotor with a composite sleeve carried on the rotor, the method comprising:
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limiting axial thermal expansion of the sleeve with at least one outer layer of fiber-reinforced composite having a greater density of longitudinally-oriented fibers than fibers of another orientation; and radially reinforcing elements during rotation of the rotor with at least one inner layer of fiber-reinforced composite having a greater density of latitudinally-oriented fibers than fibers of another orientation, wherein the inner layer is between the outer surface of the rotor and the outer layer. - View Dependent Claims (38, 39)
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Specification