STATOR CORE COMPRISING COBALT CARBIDE AND METHOD OF MAKING THE SAME
First Claim
1. An electric machine, comprising:
- a rotor; and
a stator core radially outward from the rotor, the stator core being stationary relative to the rotor during operation;
wherein the stator core comprises;
carbon fibers and cobalt carbide, andwherein the stator core is greater than or equal to 40% cobalt by weight.
1 Assignment
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Accused Products
Abstract
Disclosed is an electric machine, comprising: a rotor; and a stator core radially outward from the rotor, the stator core being stationary relative to the rotor during operation; wherein the stator core comprises: carbon fibers and cobalt carbide, and wherein the stator core is greater than or equal to 40% cobalt by weight. A method of forming a stator core, comprising: coating a plurality of carbon fiber sheets with a mixture of resin and cobalt powder, wherein the resin is a phenolic resin, a powdered pitch resin, or a combination comprising at least one of the foregoing; pressing together the plurality of carbon fiber sheets; heat treating the plurality of carbon fiber sheets to form cobalt carbide in the carbon fiber sheets; and forming a plurality of laminations from the resulting mixture to produce the stator core.
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Citations
20 Claims
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1. An electric machine, comprising:
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a rotor; and a stator core radially outward from the rotor, the stator core being stationary relative to the rotor during operation; wherein the stator core comprises;
carbon fibers and cobalt carbide, andwherein the stator core is greater than or equal to 40% cobalt by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of forming a stator core such that the stator core comprises carbon fibers and cobalt carbide, and wherein the stator core is greater than or equal to about 40% cobalt by weight, the method comprising:
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coating a plurality of carbon fiber sheets with a mixture of resin and cobalt powder, wherein the resin is a phenolic resin, a powdered pitch resin, or a combination comprising at least one of the foregoing; pressing together the plurality of carbon fiber sheets; heat treating the plurality of carbon fiber sheets to form cobalt carbide in the carbon fiber sheets; and forming a plurality of laminations from the resulting material to produce the stator core.
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20. A method of forming a stator core such that the stator core comprises carbon fibers and cobalt carbide, and wherein the stator core is greater than or equal to about 40% cobalt by weight, the method comprising:
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mixing phenolic resin, cobalt powder, and carbon fibers; die casting the resulting mixture; and forming a plurality of laminations from the mixture to produce the stator core.
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Specification