Folded foil transformer construction
US6087922A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Mar 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/2861
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved low profile transformer is disclosed. The transformer has desirable characteristics for switch mode power supplies such as minimum high frequency resistance, improved coupling of primary and secondary windings, and reduced eddy current losses. The transformer has a primary winding comprised of an insulated conducting foil that is folded into a staircase-shaped winding. One or more secondary winding segments comprised of U-shaped conducting sheets are interleaved with the primary winding to form a minimally separated primary and secondary winding. The windings are substantially surrounded by an E-shaped magnetic core to facilitate the magnetic coupling of the windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.