The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2012
Filed:
Sep. 10, 2008
Atsushi Sato, Itami, JP;
Toru Maeda, Itami, JP;
Atsushi Sato, Itami, JP;
Toru Maeda, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
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 (σ/μ) of the standard deviation (σ) 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.