Winding structure for efficient switch-mode power converters
US7427910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2004 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Nov 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Cutout and/or keep away regions are etched in the winding structure near the gapped center leg of a magnetic core. This reduces eddy current losses caused by the leakage field and improves current uniformity and current sharing between windings thereby increasing converter efficiency. Windings closest to the air gap are suitably formed with both keep away regions and cutouts. Windings a little further away are formed with only cutouts, and the windings furthest away are unchanged. This approach keeps the net winding losses low in the presence of a fringing field. The precise configuration is determined by the core structure, air gap and winding arrangements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.