Electrically insulating composition used in conjunction with dynamoelectric machines
AssigneeGeneral Electric Company
InventorsJeffrey David Sheaffer, David John Wardell, Jessica Mary Powers, Stephen Frank Francese
Life of this patent
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Abstract
An electrically insulating composition comprising about 25 to about 55 percent by weight of filler materials, about 45 to about 75 percent by weight of resin. The percentages being selected such that the total percentage of components does not exceed 100 percent. The composition has a thermal conductivity of about 0.2 to about 1.3 W/m-K when measured at 130° C.
Claims17
An electrically insulating composition comprising:
- about 25 to about 55 percent by weight of filler materials, the filler materials comprising about 15 to about 25 percent of silane-treated glass, 0 to about 30 percent of boron nitride, and 0 to about 1.5 percent of silane-treated fumed silica;
- about 45 to about 75 percent by weight of Bisphenol resin;
- and
- wherein the percentages being selected such that the total percentage of components does not exceed 100 percent, and the composition having a thermal conductivity of about 0.2 to about 1.3 W/m-K when measured at 130° C.
An electrically insulating composition to be used with a catalytic hardener and accelerator, the composition comprising:
- about 25 to about 55 percent by weight of filler materials, the filler materials comprising:
- (a) about 15 to about 25 percent of glass;
- (b) 0 to about 30 percent of boron nitride;
- (c) 0 to about 1.5 percent of fumed silica;
- about 45 to about 75 percent by weight of resin, the resin comprising Bisphenol A (BpA) resin;
- and
- wherein the percentages being selected such that the total percentage of composition components does not exceed 100 percent, and the composition having a thermal conductivity of about 0.2 to about 1.3 W/m-K when measured at 130° C.
An electrically insulating composition to be used with a catalytic hardener and accelerator, the composition adapted for insulating generator components, the composition comprising:
- about 20 to 25 percent of silane-treated glass;
- about 15 to 22.5 percent of boron nitride, the boron nitride comprising about 80 percent spherical boron nitride and about 20 percent flake boron nitride;
- about 0.2 percent of silane-treated fumed silica;
- about 0 to 0.5 percent pigment;
- resin comprising the balance, the resin comprising Bisphenol A (BpA) resin;
- and
- wherein the percentages being selected such that the total percentage of composition components does not exceed 100 percent, and the composition having a thermal conductivity of about 0.6 to about 1.0 W/m-K when measured at 130° C.
An electrically insulating composition comprising:
- about 25 to about 55 percent by weight of filler materials, the filler materials comprising silane-treated glass, boron nitride, and silane-treated fumed silica, the boron nitride comprising a mixture of spherical boron nitride and flake boron nitride;
- about 45 to about 75 percent by weight of Bisphenol A (BpA) resin;
- and
- wherein the percentages being selected such that the total percentage of components does not exceed 100 percent.
Dependencies are inferred from the claim text.