General Electric Company

Mark Edwin Rodda

Weijun Yin

Kevin Warner Flanagan

Sergei Kniajanski

Robert Colin McTigue

James Jun Xu

A method of making a composite magnet wire includes mixing alumina nano particles with a polyimide polymer to form a polyimide mixture, the alumina nano particles having a surface treatment applied to outer surfaces of the alumina nano particles, the surface treatment including a phenyl-silane; coating a wire with the polyimide mixture by passing the wire through a coating die; heating the coated wire; cooling the coated wire; passing the coated wire through an annealing oven at a temperature of about 425&#xb0; C. to about 475&#xb0; C. at a speed of about 15 to about 30 feet per minute to anneal the coated wire; cooling the annealed coating wire; spooling the coated wire onto a metal spool; heating the spooled wire at about 300&#xb0; C. to about 400&#xb0; C. for about 20 to about 40 minutes; and cooling the heated spooled wire.

High temperature high frequency magnet wire and method of making

A composite magnet wire includes, in an exemplary embodiment, a metal wire and a coating applied to an outer surface of the wire. The coating includes a polyimide polymer and a plurality of alumina nano particles dispersed in the polyimide polymer. The alumina nano particles have a surface treatment applied to outer surfaces of the alumina nano particles, where the surface treatment includes a phenyl-silane. The composite magnet wire has a thermal degradation temperature index of at least 300&#xb0; C. as calculated in accordance with ASTM E1641 or D2307.

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Newbury Park, CA, United States of America

Mark Edwin Rodda