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:
Sep. 11, 2018
Filed:
Mar. 27, 2014
Hitachi Chemical Company, Ltd., Chiyoda-ku, Tokyo, JP;
HITACHI CHEMICAL COMPANY, LTD., Tokyo, JP;
Abstract
Provided is a powder magnetic core for a reactor, whose electromagnetic properties are difficult to change with time, even when applied to a reactor used in a state that the core is exposed without being potted. The powder magnetic core for a reactor consists essentially of a compact composed of an insulation-coated iron-based soft magnetic powder that an insulating film is formed on the surface of an iron-based soft magnetic powder, and which has such a change with time of 500 hours at 180° C. that a ratio of decrease in effective magnetic permeability being 1% or less. In the compact, the content of gapping between two adjacent particles of the insulation-coated iron-based soft magnetic powder is 2 vol % or less.