Coil device, composite coil device, and transformer device
US7443278B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2008 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Mar 6, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/2819
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transformer-type compact and thin coil device having a high coupling degree between a primary coil and a secondary coil, and a transformer device in which a plurality of sets of the transformer-type coil devices are incorporated. A coil device includes a first winding portion in which a primary and secondary coil wires are wound in bifilar form so as to arrange them alternately in a plane, a second winding portion in which a secondary coil wire is wound to arrange it in a plane parallel to the plane of the first winding portion, and a secondary coil connecting portion which connects an inner diameter portions of the secondary coil wires of the first and second winding portions. A transformer device is formed by incorporating a plurality of sets of the transformer-type coil devices each formed in above manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.