Dynamoelectric machine having coil windings and core encapsulate

Details Dynamoelectric machine having coil windings and core encapsulate Dynamoelectric machine having coil windings and core encapsulate

1977-04-13

1978-12-05

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 40R, 260 23EP, 260 23AR, 260 4228, 260 285R, 310 43, 310 45, C08K 714

Patent

active

041285271

ABSTRACT:
In a dynamoelectric machine having a stator assembly of coil windings and a core, a heat-dissipating, electro-insulative housing encapsulates the coil windings and the core. The housing is made of a cured molded article or material formed of a resin-filler composition which comprises a liquid unsaturated polyester resin, a finely divided calcium carbonate powder, an inorganic mineral particulate having a particle size larger than that of the calcium carbonate powder, and a chopped glass fiber, wherein the ratio by weight of the calcium carbonate to the mineral particulate is 0.3 to 4, the ratio of the weight of glass fiber to the total weight of the composition is 0.05 to 0.25, the ratio of the weight of the polyester resin to the total weight of the composition is 0.1 to 0.4 and the weight ratio of the calcium carbonate powder, the mineral particulate and the glass fiber to the total weight of the composition is 0.6 to 0.9.
The disclosure is also concerned with a dynamoelectric machine having a housing made of a cured article of a composition containing a certain amount of clay powder as a separation inhibitor.

REFERENCES:
patent: 3562201 (1971-02-01), Crowe et al.
patent: 3658750 (1972-04-01), Tsukui et al.
patent: 3758799 (1973-09-01), Dorchterman et al.
patent: 3763080 (1973-10-01), Deuyer

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