Coil device and switching power supply apparatus using the same
US6281779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coil device having a core having an intermediate leg and at least a pair of external legs arranged at equal intervals from the intermediate leg; a first printed coil provided on a first substrate which has an intermediate hole and a pair of external holes respectively inserted in the intermediate leg and the pair of external legs of the core, the first printed coil being wound around the intermediate hole; and a second printed coil provided on a second substrate which has an intermediate hole and a pair of external holes respectively inserted in the intermediate leg and the pair of external legs of the core, the second printed coil including a pair of external printed coils which are connected in series and are respectively wound around the pair of the external holes with the same number of turns but in opposite directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.