Method of making a heat transfer element for an electric machine
AssigneeGE Aviation Systems LLC
InventorCharles T. Sigler
Life of this patent
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Abstract
An electric machine, such as a generator, providing for the generation of electricity and includes a rotor generating a magnetic field and a stator having stator windings. The interaction of the magnetic field with the stator windings generates current in the windings. The generator may provide the generated current to a power output of the generator, where it may be further transmitted to an electrical load to power the load.
Claims9
A method of making a heat transfer element for an electric machine having a plurality of windings with end turns and the heat transfer element has a body defining a face for contacting the end turns to transfer heat via conduction from the windings, the method comprising:
- placing at least the face of the heat transfer element in an expanded state by heating the body;
- applying a dielectric coating on at least a portion of the face contacting the end turns while the face is in the expanded state, wherein applying the dielectric coating includes applying the dielectric coating via plasma coating;
- and
- placing the dielectric coating in a compressed state by cooling the heat transfer element;
- wherein subsequent expansion of the body in response to an application of heat results in the expansion of the dielectric coating to move it from a compressed state to an uncompressed state, thereby reducing the likelihood of crack propagation in the dielectric coating during the expansion of the body.
Dependencies are inferred from the claim text.