Planar transformer assembly including non-overlapping primary and secondary windings surrounding a common magnetic flux path area
US5598327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1994 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Jan 28, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A planar transformer assembly includes an insulative layer, a first spiral winding thereon circumscribing a magnetic flux path, a second spiral winding thereon in non-overlapping relation to the first spiral winding circumscribing the magnetic flux path, and a ferrite core assembly including first and second core sections defining a shallow gap or passage within which the spiral windings are disposed. In one embodiment, a plurality of laminated insulative layers are provided with a primary winding including a plurality of series-connected spiral subwindings and a non-overlapping secondary winding formed on the various insulative layers. The non-overlapping structure and the order of the various windings minimize electric field gradients and thereby minimize electric field coupled noise currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.