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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.:

US 9941039 B1

PDFFull Text
Date of Patent:
Apr. 10, 2018

Filed:

Jun. 12, 2015

Soft magnetic member, reactor, powder for dust core, and method of producing dust core

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;

Inventors:

Daisuke Okamoto, Toyota, JP;

Kiyotaka Onodera, Toyota, JP;

Shinjiro Saigusa, Toyota, JP;

Kohei Ishii, Nagoya, JP;

Masashi Ohtsubo, Nagakute, JP;

Junghwan Hwang, Nagakute, JP;

Masaaki Tani, Nagakute, JP;

Takeshi Hattori, Nagakute, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Elvin G Enad

Assistant Examiner:

Kazi Hossain

Int. Cl.
CPC ...
H01F 17/04 (2006.01); H01F 27/24 (2006.01); H01F 1/24 (2006.01); H01F 41/02 (2006.01); H01F 1/147 (2006.01); H01F 1/33 (2006.01); B22F 1/02 (2006.01); C22C 33/02 (2006.01); H01F 3/08 (2006.01); H01F 27/255 (2006.01);
U.S. Cl.
CPC ...
H01F 1/24 (2013.01); B22F 1/02 (2013.01); C22C 33/0257 (2013.01); C22C 33/0264 (2013.01); H01F 1/14791 (2013.01); H01F 1/33 (2013.01); H01F 41/0246 (2013.01); B22F 2998/10 (2013.01); H01F 3/08 (2013.01); H01F 27/255 (2013.01);
Abstract

A soft magnetic member is formed such that, when a differential relative permeability in an applied magnetic field of 100 A/m is represented by a first differential relative permeability μ'L, and when a differential relative permeability in an applied magnetic field of 40 kA/m is represented by a second differential relative permeability μ′H, a ratio of the first differential relative permeability μ′L to the second differential relative permeability μ′H satisfies a relationship of μ′L/μ′H≤10, and a magnetic flux density in an applied magnetic field of 60 kA/m is 1.15 T or higher.

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