ROTOR FOR ELECTRIC MACHINE HAVING A SLEEVE WITH SEGMENTED LAYERS
First Claim
1. A rotor for an electrical machine comprising:
- 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; and
a composite sleeve around the rotor core assembly, the sleeve comprising;
an outer layer; and
a segmented layer beneath the outer layer comprising a plurality of discrete, non-overlapping circumferential bands of composite material positioned orthogonal to a longitudinal axis of the rotor core assembly.
5 Assignments
0 Petitions
Accused Products
Abstract
An electric machine system includes an electric machine and a companion device. The electric machine has a stationary member and a movable member that, by interaction of magnetic fields, at least one of moves relative to the stationary member or generates electricity when moved relative to the stationary member. One of the stationary member and the movable member includes a permanent magnet. The companion device is coupled to the electric machine to communicate mechanical movement with the movable member. In certain instances, the electric machine system has adaptations for operation of the electric machine system subsea and/or in a corrosive environment.
118 Citations
20 Claims
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1. A rotor for an electrical machine comprising:
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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; and a composite sleeve around the rotor core assembly, the sleeve comprising; an outer layer; and a segmented layer beneath the outer layer comprising a plurality of discrete, non-overlapping circumferential bands of composite material positioned orthogonal to a longitudinal axis of the rotor core assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A composite sleeve adapted to cover a portion of an elongate rotor hub of an electrical machine having an outer surface, the sleeve comprising:
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an outer layer; and an inner layer comprising a plurality of latitudinal, adjacent, non-overlapping composite hoops, the inner layer residing between the outer surface of the rotor hub and the outer layer. - View Dependent Claims (11, 12, 13, 14, 15)
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16. 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 axially-oriented fibers than fibers of any other orientation; radially supporting elements during rotation of the rotor with an inner layer comprising a plurality of latitudinal, adjacent, non-overlapping fiber-reinforced composite bands; and focusing thermal expansion of the sleeve at gaps between adjacent non-overlapping composite bands. - View Dependent Claims (17, 18, 19, 20)
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Specification