Compression molded core, method for manufacturing the compression molded core, inductor including the compression molded core, and electric/electronic equipment mounted with the inductor
US12224092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2021 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Feb 10, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/15308
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compression molded core contains a plurality of soft magnetic material powders. A first powder and a second powder in the plurality of powders satisfy D1>D2, 0.23≤(D1−D2)/D1<0.6, D1≤7 μm, and 3 μm≤DT≤5.7 μm. D1 is the median diameter, which is a particle size at which the integrated particle diameter distribution from the small particle size side is 50% in a volume-based particle size distribution measured by a laser diffraction/scattering method, of the first powder and is maximum among median diameters; D2 is the median diameter D2 of the second powder and is minimum among median diameters; and DT is determined using the weight rate R1 of the first powder and the weight rate R2 of the second powder by R1×D1+R2×D2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.