This paper presents the three-dimensional modeling of soft magnetic composite (SMC) based on the discrete element method. The proposed method makes it possible to take the possible contact among the magnetic particles in SMC as well as the distributed particle size into consideration. Based on this modeling, the macroscopic B-H characteristics is computed with the finite element method considering magnetic saturation. It is shown that the three-dimensional model of SMC can have larger initial permeability in comparison with the two-dimensional model even if they have the same filling factor.
WakiH.IgarashiH. and HonmaT., Analysis of magnetic shielding effect of layered shields based on homogenization, IEEE Transactions on Magnetics42(4) (2006), 847–850.
2.
WakiH.IgarashiH. and HonmaT., Estimation of non-linear effective permeability of magnetic materials with fine structure, Physica B: Condensed Matter372(1-2) (2006), 383–387.
3.
OllendorffF., Magnetostatik der massekerne, Arch. f. Eledtrotechnik.25 (1931), 436–447.
4.
SatoT.AyaS.IgarashiH.SuzukiM.IwasakiY. and KawanoK., Loss computation of soft magnetic composite inductors based on interpolated scalar magnetic property, IEEE Transaction on Magnetics51(3) (2015), 8001704.
5.
ItoY.IgarashiH.SuzukiM.IwasakiY. and KawanoK., Effect of magnetic contact on macroscopic permeability of soft magnetic composite, IEEE Trans. Magn.52(3) (2016), 1–4.
6.
MaruoA. and IgarashiH., Analysis of magnetic properties of soft magnetic composite using discrete element method, IEEE Trans. Magn.55(6) (2019), 1–5.
7.
CundallP.A. and StrackO.D.L., A discrete numerical model for granular assemblies, Geotechnique29(1) (1979), 47–65.
8.
CyrC.ViarougeP.CienetS. and CrosJ., Methodology to study the influence of the microscopic structure of soft magnetic composites on their global magnetization curve, IEEE Transactions on Magnetics45(3) (2009), 1178–1181.
