Resin impregnated aromatic polyamide covered glass based slot wedge for large dynamoelectric machines
First Claim
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1. An iron engaging slot wedge adapted to be positioned in the coil slots of a dynamoelectric machine comprising a glass fiber core impregnated with a cured thermoset resin, and covered, on at least two sides, with a facing layer of a mat of aromatic polyamide fiber, impregnated with a cured thermoset resin.
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Abstract
An iron engaging slot wedge, for use in coil slots of dynamoelectric machines is made of a glass fiber core impregnated with a cured thermoset resin, and covered on at least two sides with a facing layer of a porous aromatic polyamide mat, impregnated with a cured thermoset resin.
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12 Claims
- 1. An iron engaging slot wedge adapted to be positioned in the coil slots of a dynamoelectric machine comprising a glass fiber core impregnated with a cured thermoset resin, and covered, on at least two sides, with a facing layer of a mat of aromatic polyamide fiber, impregnated with a cured thermoset resin.
- 11. In the coil slot of a dynamoelectric machine, a laminated, slot wedge facing wound coils consisting essentially of a glass fiber core impregnated between about 40 wt.% to about 60 wt.% with a cured thermoset resin, and covered, on at least two sides, with a resilient facing layer consisting essentially of a poly (phenylenephthalamide) fiber matrix of at least 70% porosity, impregnated with about 60 wt.% to about 80 wt.% of a cured thermoset resin, said slot wedge having an interlaminar shear strength of over about 2,500 lb./in. of length at 100°
Specification