Composite material, reactor, converter, and power conversion device
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Wiring Systems, Ltd., Autonetworks Technologies, Ltd.
InventorKazuhiro Inaba
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Abstract
There is provided a composite material containing magnetic powder and a polymeric material including the powder in a dispersion state, wherein a content of the magnetic powder with respect to the whole composite material is more than 50% by volume and 75% by volume or less, a saturation magnetic flux density of the composite material is 0.6 T or more, and a relative magnetic permeability of the composite material is more than 20 and is 35 or less. It is preferable that a density ratio of the magnetic powder should be 0.38 or more and 0.65 or less. The density ratio is set to be an apparent density/a true density. Moreover, it is preferable that the magnetic powder should include a plurality of particles constituted of the same material.
Claims10
A composite material comprising magnetic powder and a polymeric material including the powder in a dispersion state, wherein
- the magnetic powder consists of a plurality of particles constituted of the same material as pure iron powder,
- a plurality of peaks is present when a particle size distribution of the magnetic powder is taken, the plurality of peaks having first and second peaks in the particle size distribution represented by particle diameters r1 and r2, respectively, and satisfying r1≤(½)×r2,
- the particle diameter r1 is 50 micrometers or more and 100 micrometers or less, and the particle diameter r2 is 100 micrometers or more and 150 micrometers or less,
- a content of the magnetic powder with respect to the whole composite material is more than 50% by volume and 75% by volume or less,
- a saturation magnetic flux density of the composite material is 0.6 T or more, and
- a relative magnetic permeability of the composite material is more than 20 and 35 or less.
Dependencies are inferred from the claim text.