High voltage isolation transformer

Details High voltage isolation transformer High voltage isolation transformer

1983-06-21

1985-04-09

Kozma, Thomas J.

Inductor devices

With electric and/or magnetic shielding means

336198, H01F 1504

Patent

active

045104760

ABSTRACT:
A high voltage isolation transformer (10) is provided with primary (30) and secondary (32) coils separated by discrete electrostatic shields from the surfaces of insulating spools (12,14) on which the coils are wound. The electrostatic shields are formed by coatings (49,59,50,60) of a compound having a low electrical conductivity which completely encase the coils and adhere to the surfaces of the insulating spools (12,14) adjacent to the coils. Coatings (47,48) of the compound also line axial bores of the spools, thereby forming electrostatic shields separating the spools from legs (18,20) of a ferromagnetic core (16) extending through the bores. The transformer is able to isolate a high constant potential applied to one of its coils, without the occurrence of sparking or corona, by coupling the coatings lining the axial bores to the ferromagnetic core and by coupling one terminal of each coil to the respective coating encasing the coil.

REFERENCES:
patent: 1523891 (1925-01-01), Petersen et al.
patent: 2170048 (1939-08-01), Dunning et al.
patent: 2385460 (1945-09-01), Omansky
patent: 2390800 (1945-12-01), Madsen
patent: 2413195 (1946-12-01), Schwager
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patent: 3070766 (1962-12-01), Purdy
patent: 3265998 (1966-08-01), Park
patent: 4176334 (1979-11-01), Buritz et al.
patent: 4333900 (1982-06-01), Carey
patent: 4379999 (1983-04-01), Kimura

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