ELECTRIC MACHINE ROTOR
First Claim
1. A wedge for a rotor of an electric machine comprising:
- a circumferentially outer surface defining a radial extent of the wedge extending from a first axial end of the wedge to a second axial end of the wedge;
a plurality of circumferentially-extending grooves extending radially inwardly from the circumferentially outer surface to a groove depth, the plurality of grooves axially-spaced along a wedge length between the first axial end and the second axial end, the axial spacing between the grooves is greater than an axial width of each groove, an intermediate surface between adjacent grooves having a same radial position as a first end surface between the first axial end and a first groove closest to the first axial end; and
two planar side surfaces circumferentially bounding the circumferentially outer surface extending radially inwardly from the cicumferential outer surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A wedge for a rotor of an electric machine includes a circumferentially outer surface defining a radial extent of the wedge extending from a first axial end of the wedge to a second axial end of the wedge. A plurality of circumferentially-extending grooves extend radially inwardly from the circumferentially outer surface to a groove depth. The plurality of grooves are axially spaced along a wedge length between the first axial end and the second axial end. The axial spacing between the grooves is greater than an axial width of each groove. An intermediate surface between adjacent grooves has a same radial position as a first end surface between the first axial end and a first groove closest to the first axial end. Two planar side surfaces circumferentially bound the circumferentially outer surface and extend radially inwardly from the cicumferential outer surface.
9 Citations
18 Claims
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1. A wedge for a rotor of an electric machine comprising:
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a circumferentially outer surface defining a radial extent of the wedge extending from a first axial end of the wedge to a second axial end of the wedge; a plurality of circumferentially-extending grooves extending radially inwardly from the circumferentially outer surface to a groove depth, the plurality of grooves axially-spaced along a wedge length between the first axial end and the second axial end, the axial spacing between the grooves is greater than an axial width of each groove, an intermediate surface between adjacent grooves having a same radial position as a first end surface between the first axial end and a first groove closest to the first axial end; and two planar side surfaces circumferentially bounding the circumferentially outer surface extending radially inwardly from the cicumferential outer surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A rotor assembly for a generator comprising:
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a plurality of field coils; a rotor core centered about a rotor axis and supportive of the plurality of field coils; a plurality of rotor wedges, each rotor wedge assembled to the rotor core and abutting a field coil of the plurality of field coils to support and retain the field coil at the rotor core, each rotor wedge including; a circumferentially outer surface defining a radial extent of the wedge extending from a first axial end of the wedge to a second axial end of the wedge; a plurality of circumferentially-extending grooves extending radially inwardly from the circumferentially outer surface to a groove depth, the plurality of grooves axially-spaced along a wedge length between the first axial end and the second axial end, the axial spacing between the grooves is greater than an axial width of each groove, an intermediate surface between adjacent grooves having a same radial position as a first end surface between the first axial end and a first groove closest to the first axial end; and two planar side surfaces circumferentially bounding the circumferentially outer surface extending radially inwardly from the cicumferential outer surface. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification