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 includes a mixed powder consisting of pure iron powder having a particle diameter r1 and iron alloy powder having a particle diameter r2,
- a plurality of peaks, having a first and a second peaks in the particle size distribution are represented by r1 and r2 respectively, satisfying r1<(½)×r2, is present when a particle size distribution of the magnetic powder is taken,
- 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.