Production method for powdered core
US7211158B2 · kind B2 · utility
2Cited by
1References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Sep 30, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a production method for a powdered core, including steps of preparing a mixture including a soft magnetic powder and a resin powder to obtain a mixture, compacting the mixture into a predetermined shape to obtain a green compact and heating the green compact, and wherein the resin powder has a median size of not more than 50 μm, and the resin powder amount is 0.01 to 5 vol %. The method reduces production cost, and decreases eddy-current loss We and hysteresis loss Wh, whereby a powdered core in which a durability is improved and the technical advantages are expanded can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.