Low voltage power transformer
US4000483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1976 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Jun 24, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.