Ferromagnetic powder for dust core
US7498080B2 · kind B2 · utility
286Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | May 2, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A particle (10) of ferromagnetic powder for use in preparation of soft magnetic core components has a core-shell structure. The particle includes a central core (12) and a shell (14) coated on the central core. The central core is made of magnetic material and is used for providing the necessary magnetic property for the magnetic core components made from the ferromagnetic powder. The shell has a higher electrical resistance than the central core so as to reduce an eddy current loss of the magnetic core component. The shell also functions to provide an excellent bonding strength between particles of the powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.