Magnet wire with a semi-conductive insulation layer
AssigneeEssex Solutions USA LLC
InventorScott Ted Jolley
Life of this patent
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Abstract
A method for forming magnet wire with improved partial discharge performance may include providing a conductor, forming a first layer of polymeric enamel insulation formed around the conductor, and forming a second semi-conductive layer around the first layer. Forming the second layer may include providing a base polyamic acid and complexing filler particles with the base polyamic acid. The polyamic acid may be applied around the first layer, and the filler particles may migrate towards an outer surface of the second layer. The polyamic acid may be cured to form a semi-conductive enamel layer, and at least sixty percent by weight of the filler particles may be positioned within an outer half of the second layer following the migration.
Claims21
A method of forming a magnet wire, the method comprising:
- providing a conductor;
- forming a first layer of polymeric enamel insulation around the conductor;
- forming a second layer of polymeric enamel insulation around the first layer, wherein forming the second layer comprises:
- providing a base polyamic acid and complexing filler particles with the base polyamic acid;
- applying the polyamic acid around the first layer;
- migrating the filler particles towards the outer surface of the second layer;
- and
- curing the polyamic acid to form a semi-conductive enamel layer, wherein at least sixty percent by weight of the filler particles are positioned within an outer half of the second layer following the migration.
A method of forming a magnet wire, the method comprising:
- providing a conductor;
- forming a first layer of polymeric enamel insulation around the conductor;
- forming a second semi-conductive enamel layer around the first layer, wherein forming the second layer comprises:
- complexing filler particles with a base polyamic acid;
- applying the polyamic acid around the first layer;
- and
- curing the polyamic acid, wherein at least a portion of the filler particles migrate towards the outer surface of the second layer prior to curing, wherein at least sixty percent by weight of the filler particles are positioned within an outer half of the second layer following the migration.
Dependencies are inferred from the claim text.