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:
Jan. 14, 2020
Filed:
Oct. 12, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Daisuke Okamoto, Toyota, JP;
Toshimitsu Takahashi, Toyota, JP;
Sinjiro Saigusa, Toyota, JP;
Kohei Ishii, Nagoya, JP;
Naoki Iwata, Toyota, JP;
Jung Hwan Hwang, Nagakute, JP;
Masashi Ohtsubo, Nagakute, JP;
Takeshi Hattori, Nagakute, JP;
Masashi Hara, Nagakute, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
Provided is a compressed powder core that can suppress a decrease in the inductance even when a high magnetic field (of greater than or equal to 40 kA/m) is applied to the compressed powder core while suppressing an iron loss and a decrease in the strength of the compressed powder core. The compressed powder coreA has soft magnetic particlesA and aluminum nitride layersA formed on the surface layers of the respective soft magnetic particlesA. The compressed powder coreA has a ratio of the first differential relative permeability μ'L to the second differential relative permeability μ′H satisfying a relationship of μ′L/μ′H≤6, and has a magnetic flux density of greater than or equal to 1.4 T when a magnetic field of 60 kA/m is applied. The soft magnetic particles of the compressed powder coreA contain Si in the range of 1.0 to 3.0 mass % and have, when analyzed using XRD, a peak area ratio Sal/Sfe of greater than or equal to 4%, the peak area ratio Sal/Sfe being the ratio of the area Sal of a peak waveform derived from AlN to the area Sfe of a peak waveform derived from Fe.