CORE FOR REACTORS, ITS MANUFACTURING METHOD, AND REACTOR

摘要

To provide a core for reactor capable of reducing the eddy current loss and improving the direct current superposition characteristics, a manufacturing method thereof, and a reactor. A core for reactor M is obtained by press molding metallic magnetic particles coated with an insulating coated film, and the metallic magnetic particles have the following compositions: (1) the mean particle size is 1 µm or more and 70 µm or less; (2) the variation coefficient Cv which is a ratio (Ã/µ) of the standard deviation (Ã) of the particle size and the mean particle size (µ)is 0.40 or less; and (3) the degree of circularity is 0.8 or more and 1.0 or less. On the outside of the insulating coated film, at least one of a heat-resistance imparting protective film and a flexible protective film is further provided as a outer coated film.