Coil-embedded dust core production process, and coil-embedded dust core formed by the production process
US6759935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2001 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Dec 26, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/5313
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a process for producing a coil-embedded dust core by embedding a coil in magnetic powders comprising ferromagnetic metal particles coated with an insulating material. At the first compression molding step one portion of magnetic powders is filled in a molding die and then compression molded to form a lower core. At a coil positioning step the coil is positioned on the upper surface of the lower core in the molding die. At a coil embedding step another portion of magnetic powders is again filled in the molding die in such a way that the coil is embedded in these magnetic powders. At the second compression molding step pressure is applied to the lower core and coil in the direction of lamination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.