Rotor assembly with solid low friction layer and press-fit sleeve
AssigneeGM Global Technology Operations LLC
InventorsAnthony Michael Coppola, Alireza Fatemi, Derek Frei Lahr, Kestutis A. Sonta, Alan G. Holmes
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Abstract
A rotor for an electric machine includes a rotor assembly having an outer surface and including a plurality of poles with permanent magnets. A solid layer is formed on the outer surface of the rotor assembly and has an outer surface with a first coefficient of friction that is lower than a second coefficient of friction of the outer surface of the rotor assembly. The rotor includes an outer sleeve. The rotor assembly is press-fit into the outer sleeve.
Claims20
A rotor for an electric machine, comprising:
- a rotor assembly having an outer surface and a plurality of poles with permanent magnets, the permanent magnets located in openings of the rotor assembly and positioned radially inwards from the outer surface;
- a solid layer formed on the outer surface of the rotor assembly and radially outwards from the permanent magnets, the solid layer having an outer surface with a first coefficient of friction that is lower than a second coefficient of friction of the outer surface of the rotor assembly;
- and
- an outer sleeve,
- wherein the rotor assembly is press-fit into the outer sleeve.
A method for manufacturing a rotor for an electric motor, comprising:
- providing a rotor assembly including a plurality of rotor portions with permanent magnets and having an outer surface, the permanent magnets located in openings of the rotor assembly and positioned radially inwards from the outer surface;
- forming a solid layer on the outer surface of the rotor assembly and radially outwards from the permanent magnets,
- wherein the solid layer has a first coefficient of friction than is lower than a second coefficient of friction of the outer surface of the rotor assembly;
- and
- press-fitting the rotor assembly into an outer sleeve.
Dependencies are inferred from the claim text.