System and method for providing coil retention in the rotor windings of a high speed generator
First Claim
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1. A rotor for use in a high speed generator, comprising:
- a shaft;
at least a first and a second pole, each pole extending radially outwardly from the shaft and spaced apart from one another to form an interpole region therebetween;
a first coil wrapped around the first pole, the first coil having an outer surface including two sides;
a second coil wrapped around the second pole, the second coil having an outer surface including two sides; and
a coil interpole wedge having at least one piece of a compliant, porous material coupled to an outer surface thereof, the coil interpole wedge positioned in the interpole region such that the compliant, porous material is in abutting contact with at least a portion of one of the sides of the first coil outer surface and one of the sides of the second coil outer surface.
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Accused Products
Abstract
A coil retention system for a rotor of a high speed electrical generator, such as an aircraft generator, that uses compliant material to fill variable dimension voids and/or gaps in the coils wound around the rotor of an electrical machine. During processing of the rotor and coil retention system, the compliant material hardens and is able to withstand the centrifugal loads imposed by, and environmental conditions within, the high speed generator.
68 Citations
17 Claims
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1. A rotor for use in a high speed generator, comprising:
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a shaft; at least a first and a second pole, each pole extending radially outwardly from the shaft and spaced apart from one another to form an interpole region therebetween; a first coil wrapped around the first pole, the first coil having an outer surface including two sides; a second coil wrapped around the second pole, the second coil having an outer surface including two sides; and a coil interpole wedge having at least one piece of a compliant, porous material coupled to an outer surface thereof, the coil interpole wedge positioned in the interpole region such that the compliant, porous material is in abutting contact with at least a portion of one of the sides of the first coil outer surface and one of the sides of the second coil outer surface. - View Dependent Claims (2, 3, 4, 5)
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6. A high speed generator, comprising:
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a stator; and a rotor rotationally mounted within the stator, the rotor including; a shaft; at least a first and a second pole, each pole extending radially outwardly from the shaft and spaced apart from one another to form an interpole region therebetween, a first coil wrapped around the first pole, the first coil having an outer surface including two sides, a second coil wrapped around the second pole, the second coil an outer surface including two sides, and a coil interpole wedge having at least one piece of a compliant, porous material coupled to an outer surface thereof, the coil interpole wedge positioned in the interpole region such that the compliant, porous material is in abutting contact with at least a portion of one of the sides of the first coil outer surface and one of the sides of the second coil outer surface. - View Dependent Claims (7, 8, 9, 10)
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11. A method of making a rotor for a high speed electrical machine, comprising:
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providing a shaft; forming at least a tint pole and a second pole on the shaft that extend radially outwardly from the shaft and are spaced apart from one another to form an interpole region therebetween; wrapping a first coil around the first pole, the first coil having an outer surface including two sides; wrapping a second coil the second pole, the second coil having an outer surface including two sides; providing at least one interpol wedge having an outer surface; coupling a piece of a compliant, porous material to the interpole wedge outer surface; and inserting the interpole wedge into the interpole region such that the piece of compliant, porous material is in abutting contact with at lest a portion of one of the sides of the first coil outer surface and one of the sides of the second coil outer surface. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification