Low voltage power transformer

Details Low voltage power transformer Low voltage power transformer

1976-06-24

1976-12-28

Kozma, Thomas J.

Inductor devices

With outer casing or housing

Exposed core portions

336192, 336198, H01F 2730

Patent

active

040004830

ABSTRACT:
A transformer comprising a stack of sheet metal laminations; an insulating plastic bobbin on which a primary coil is wound; an insulating plastic bobbin on which the secondary coil is wound; and two interengaging insulating plastic covers which enclose the primary coil and provide additional insulation between the primary coil and the laminations and between the primary and secondary coils, while also providing a strain relief for the primary leads from the primary coil. The plastic components are formed to provide two mms of insulation between the primary and secondary coils, and between the primary coil and the laminations. The plastic components are arranged to provide at least 10 mms of "creepage" distance between primary and secondary coils and at least 8mms between the primary coil and the laminations. The insulation provided is sufficient to permit the steel laminations to be mounted directly on the metal frame of an appliance.

REFERENCES:
patent: 3750072 (1973-07-01), Weiner
patent: 3750073 (1973-07-01), Okano
patent: 3781741 (1973-12-01), Weiner
patent: 3909761 (1975-09-01), Miles

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