Alps Electric Co., Ltd.

Alps Alpine Co., Ltd.

Alps Green Devices Co., Ltd.

Kinshiro Takadate

Hisato Koshiba

Hitoshi Onishi

Shokan Yamashita

Takao Mizushima

Masahiro Iizuka

Eiichi Komai

Eiichi Takahashi

Yutaka Naito

Kazuki Iwaya

Keiko Tsuchiya

Toshio Takahashi

A dust core contains a powder of a crystalline magnetic material powder and a powder of an amorphous magnetic material. The sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 83 mass percent or more. The mass ratio of the content of the crystalline magnetic material powder to the sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 20 mass percent or less. The median diameter D50a of the amorphous magnetic material powder is greater than or equal to the median diameter D50c of the crystalline magnetic material powder. A 10% cumulative diameter D10a in a volume-based cumulative particle size distribution of the amorphous magnetic material powder is 9.5 μm or less.

Dust core, method for manufacturing dust core, inductor including dust core, and electronic/electric device including inductor

A dust core contains a powder of a crystalline magnetic material powder and a powder of an amorphous magnetic material. The sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 83 mass percent or more. The mass ratio of the content of the crystalline magnetic material powder to the sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 20 mass percent or less. The median diameter Dof the amorphous magnetic material powder is greater than or equal to the median diameter Dof the crystalline magnetic material powder.

A DC-to-DC converter includes a voltage converter having: a capacitance; at least one inductor configured to store energy and exchange stored energy with the capacitance; and a switching element configured to switch on and off a current flowing through the inductor and change direction of the current at each switching. The inductor includes a variable inductor whose inductance decreases with increase in the current.

DC-to-DC converter

An Fe-based amorphous alloy of the present invention has a composition represented by formula (FeCrPCBSi(a, b, c, d, and e are in terms of at %), where 0 at %&#x2266;a&#x2266;1.9 at %, 1.7 at %&#x2266;b&#x2266;8.0 at %, 0 at %&#x2266;e&#x2266;1.0 at %, an Fe content (100-a-b-c-d-e) is 77 at % or more, 19 at %&#x2266;b+c+d+e&#x2266;21.1 at %, 0.08&#x2266;b/(b+c+d)&#x2266;0.43, 0.06&#x2266;c/(c+d)&#x2266;0.87, and the Fe-based amorphous alloy has a glass transition temperature (Tg).

Fe-based amorphous alloy and dust core made using Fe-based amorphous alloy powder

Embodiments of the present disclosure are directed to an Fe-based amorphous magnetic alloy and method that includes 4 at. % or less of a low temperature annealing-enabling element M and 10 at. % or less of nickel (Ni). The total amount of the low temperature annealing-enabling element M and nickel (Ni) may be 2 at. % or more and 10 at. % or less.

Fe-based amorphous magnetic alloy and magnetic sheet

A non-reciprocal circuit element includes a magnetic plate, a common electrode, a first main segment, a second main segment, a third main segment, and a magnet opposing to the magnetic plate and the magnet applying a bias magnetic field. The temperature coefficient of the saturation magnetization of the magnetic plate is from &#x2212;0.2%/&#xb0; C. to &#x2212;0.1%/&#xb0; C. in the temperature range from &#x2212;35&#xb0; C. to 85&#xb0; C. The temperature coefficient of the residual magnetization of the magnet is from &#x2212;0.20%/&#xb0; C. to &#x2212;0.15%/&#xb0; C. in a temperature range from &#x2212;35&#xb0; C. to 85&#xb0; C.

Non-reciprocal circuit element with reduced shift of center frequency of insertion loss with change in temperature and communication device

A nonreciprocal circuit element includes a magnetic plate having through holes; center conductors crossing each other at a predetermined angle on a side associated with a first surface of the magnetic plate; and a common electrode disposed on a side associated with a second surface of the magnetic plate and connected to the center conductors via the through holes.

Growing community of inventors

Niigata-ken, Japan

Kinshiro Takadate