Magnetic circuit member

摘要

A magnetic circuit member contains a matrix portion including iron and silicon; and graphite particles in the matrix. Each of the graphite particles has either a spherical shape or a compact vermicular shape. The inclusion of graphite particles having a relatively low conductivity in the matrix portion having a good magnetic property prevents eddy currents from forming in the magnetic circuit member in an alternating magnetic field, thus preserving the original magnetic property found in the absence of the alternating magnetic field. Each of the graphite particles has a spherical or compact vermicular shape that does not intercept magnetic flux passing through the material forming the magnetic circuit member. The graphite contained in the material improves liquidity of the melted material in casting, thus the magnetic circuit member can be manufactured by casting.