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:
Jun. 07, 2005
Filed:
Jan. 17, 2002
Mikio Kondo, Aichi, JP;
Shin Tajima, Aichi, JP;
Takeshi Hattori, Aichi, JP;
Yoji Awano, Aichi, JP;
Hiroshi Okajima, Aichi-ken, JP;
Mikio Kondo, Aichi, JP;
Shin Tajima, Aichi, JP;
Takeshi Hattori, Aichi, JP;
Yoji Awano, Aichi, JP;
Hiroshi Okajima, Aichi-ken, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
The present invention is characterized in that, in a powder magnetic core obtained by compaction of an iron-based magnetic powder covered with an insulation film, a saturation magnetization Ms is Ms≧1.9 T in a 1.6 MA/m magnetic field; a specific resistance ρ is ρ≧1.5 μΩm; a magnetic flux density Bis B≧1.1 T in a 2 kA/m magnetic field; and a magnetic flux density Bis B≧1.6 T in a 10 kA/m magnetic field. In accordance with the present invention, it has been possible to industrially carry out compacting iron-based magnetic powders under remarkably high compacting pressures. As a result, high-performance powder magnetic cores are obtained which have a high density, and which are good in terms of the specific resistance and magnetic permeability.