Inductor devices – With temperature modifier – Ventilating passages
Patent
1998-12-29
2000-11-14
Kozma, Thomas J.
Inductor devices
With temperature modifier
Ventilating passages
336 96, 336205, 336206, 336223, H01F 2708, H01F 2732
Patent
active
061475807
ABSTRACT:
An improved low voltage winding for dry insulated transformer has its windings resin encapsulated. The winding is constructed with flexible sheet conductors wound coincident with an insulating sheet material. Insulating spacers provide a means to form air channels in the windings during the coil forming process. A sealant is applied to openings at the lower ends and along vertical seams of the coil prior to the resin impregnation and encapsulation process. This will prevent drainage of the resin during a curing cycle. The result is a coil that exhibits high short circuit protection due to the tightly bond sheet conductors which will prevent movement of the conductors during short circuit conditions and also increases the radial compressive strength of the coil.
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patent: 3939449 (1976-02-01), Boyd et al.
patent: 5267393 (1993-12-01), Purohit et al.
patent: 5383266 (1995-01-01), Soter
patent: 5396210 (1995-03-01), Purohit et al.
patent: 5461772 (1995-10-01), Puri
Hopkinson Philip John
Lett Scott Frederick
Rettew Richard Raymond
Femal Michael J.
Golden Larry I.
Kozma Thomas J.
Square D Company
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