Magnetic core, magnetic component and electronic device
AssigneeTDK Corporation
InventorsKazuhiro Yoshidome, Hiroyuki Matsumoto
Life of this patent
Estimating the term…
Abstract
A magnetic core including a magnetic powder. A total area ratio of particles of the magnetic powder in a cross section of the magnetic core is 75% or more and 90% or less. An average circularity of large size particles is 0.70 or more when the large size particles are particles extracted from the particles of the magnetic powder in the cross section of the magnetic core in the order of size from the largest size until a cumulative area ratio of the extracted particles reaches a smallest area ratio exceeding 20% of the total area ratio of the particles of the magnetic powder.
Claims10
A magnetic core comprising a magnetic powder, wherein
- a total area ratio of particles of the magnetic powder in a cross section of the magnetic core is 75% or more and 90% or less,
- an average circularity of large size particles is 0.71 or more and 0.98 or less when the large size particles are particles extracted from the particles of the magnetic powder in the cross section of the magnetic core in the order of size from the largest size until a cumulative area ratio of the extracted particles reaches a smallest area ratio exceeding 20% of the total area ratio of the particles of the magnetic powder, and
- the magnetic core has a voltage resistance×relative permeability of 2132 V/mm or more, and 3504 V/mm or less,
- wherein voltage resistance was measured with electrodes at a distance between them of 8 mm.
Dependencies are inferred from the claim text.