Rotor wedges with eddy current inhibitors
AssigneeHamilton Sundstrand Corporation
InventorsDhaval Patel, Andrew R. Wilkinson
Life of this patent
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Abstract
A wedge for securing windings in a slot in the rotor poles of a rotor core of an electrical machine includes an elongate wedge body extending in an axial direction along a longitudinal axis. The wedge body includes layers perpendicular to the axial direction. The layers vary in electrical conductivity from layer to layer to inhibit eddy currents within the wedge body.
Claims20
A wedge for securing windings in a slot in the rotor poles of a rotor core of an electrical machine comprising:
- an elongate wedge body extending in an axial direction along a longitudinal axis, wherein the wedge body includes layers perpendicular to the axial direction, wherein the layers vary in electrical conductivity from layer to layer to inhibit eddy currents within the wedge body.
A rotor for an electrical machine comprising:
- a rotor core having a plurality of circumferentially spaced apart rotor poles;
- a plurality of windings seated in slots between circumferentially adjacent pairs of the rotor poles;
- a respective wedge securing the windings in each slot, wherein the wedge includes an elongate wedge body extending in an axial direction along a longitudinal axis, wherein the wedge body includes layers perpendicular to the axial direction, wherein the layers vary in electrical conductivity from layer to layer to inhibit eddy currents within the wedge body.
A method of manufacturing a wedge for rotor of an electrical machine comprising:
- additively manufacturing a wedge body with bi-metallic layers in a direction perpendicular to a longitudinal axis of the wedge body that vary in electrical conductivity from layer to layer to inhibit eddy currents in the wedge body.
Dependencies are inferred from the claim text.