公开(公告)号：US20190252103A1

公开(公告)日：2019-08-15

申请号：US16249807

申请日：2019-01-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAISHI FUJIMOTO ,  MASATO MAEDE

IPC: H01F1/28 ,  H01F1/22 ,  B22F9/04 ,  B22F1/00 ,  C22C38/12 ,  C22C38/16 ,  C22C38/02 ,  B22F3/02

CPC classification number: H01F1/28 ,  B22F1/0014 ,  B22F3/02 ,  B22F9/04 ,  B22F2009/048 ,  B22F2301/35 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/22

Abstract: A soft magnetic alloy powder includes a first pulverized powder which has a particle diameter of 20 μm or more, a value of major diameter/minor diameter of 1.2 or more and 1.8 or less, and a flat plate shape, and a second pulverized powder which has a particle diameter of less than 3 μm, a value of major diameter/minor diameter of 1.1 or more and 1.6 or less, and a flat plate shape. A production method of a soft magnetic alloy powder, includes first processing of processing a soft magnetic alloy ribbon into a coarse powder, and second processing of pulverizing the coarse powder with a pulverizer.

公开(公告)号：US20190013129A1

公开(公告)日：2019-01-10

申请号：US16026035

申请日：2018-07-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MASATO MAEDE ,  TOSHIYUKI KOJIMA

IPC: H01F3/08 ,  H01F41/02 ,  B22F1/00

Abstract: A dust core capable of reducing the eddy-current loss of a soft magnetic powder, and having a small loss, particularly in a high-frequency region includes a powder of a soft magnetic composition having a maximum roundness of 0.5 or more, and a mean roundness of 0.2 or more. The powder includes a pulverized powder and a spherical powder. The pulverized powder has a maximum roundness of 0.5 or more, and a mean roundness of 0.2 or more. The spherical powder has a maximum roundness of 0.9 or more, and a mean roundness of 0.5 or more.

公开(公告)号：US20190013124A1

公开(公告)日：2019-01-10

申请号：US16019461

申请日：2018-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MASATO MAEDE ,  TOSHIYUKI KOJIMA

IPC: H01F1/153 ,  H01F27/255 ,  C22C45/02

Abstract: Provided herein is a soft magnetic alloy powder that can exhibit a high saturation flux density and desirable soft magnetic characteristics. A dust core using such a soft magnetic alloy powder is also provided. A soft magnetic alloy powder is used that includes an amorphous phase, and an αFe crystalline phase residing in the amorphous phase. The αFe crystalline phase has a crystallite volume distribution with a mode of 1 nm or more and 15 nm or less, and with a half width of 3 nm or more and 50 nm or less.

公开(公告)号：US20190013127A1

公开(公告)日：2019-01-10

申请号：US16019458

申请日：2018-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MASATO MAEDE ,  KAZUTO FUKUDA ,  TOSHIYUKI KOJIMA ,  MITSUO SAITOH

IPC: H01F1/33 ,  H01F27/255 ,  B22F1/02

Abstract: A soft magnetic powder that can exhibit desirable soft magnetic characteristics. A dust core using the soft magnetic powder is also provided. The soft magnetic powder includes: a soft magnetic powder layer of an unoxidized soft magnetic material; a second oxide layer as an oxide with iron or boron residing around the soft magnetic powder layer; and a first oxide layer of an iron oxide residing around the second oxide layer. The first oxide layer and the second oxide layer reside in a region of 20 nm or more and 500 nm or less from a surface of the soft magnetic powder, and are absent in a region of more than 500 nm and 1,600 nm or less from the surface.

公开(公告)号：US20190013125A1

公开(公告)日：2019-01-10

申请号：US16019469

申请日：2018-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TOSHIYUKI KOJIMA ,  MASATO MAEDE ,  TAKAO KUROMIYA

IPC: H01F1/153 ,  H01F27/255 ,  C22C45/00

Abstract: Provided herein is a dust core having high mechanical strength and high magnetic permeability. An alloy powder constituting the dust core is also provided. A soft magnetic powder is used that has a plurality of protrusions of 0.1 μm or more and 5 μm or less on an alloy powder surface. A dust core is used that contains at least 80 weight % of the soft magnetic alloy powder. A method for producing a soft magnetic powder is used that includes producing an amorphous soft magnetic alloy ribbon by liquid quenching; and pulverizing the amorphous soft magnetic alloy ribbon into a powder having a thickness of 0.1 μm or more and 40 μm or less without heat treatment. The pulverization cleaves the amorphous soft magnetic alloy ribbon, and produces a protrusion on a powder surface.

公开(公告)号：US20220397353A1

公开(公告)日：2022-12-15

申请号：US17664664

申请日：2022-05-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHOZO OCHI ,  MASATO MAEDE ,  TOMONARI NEBASHI ,  RYO ISHIKAWA

IPC: F28F21/08 ,  B23K20/12 ,  H05K7/20

Abstract: A cooling unit includes a unit main body including a bottom portion, a peripheral wall portion rising from the peripheral edge of the bottom portion, and a sealing body for sealing an opening of the unit main body. The unit main body is joined to the sealing body through a plasticized region, and a void is formed at a position close to the unit main body with respect to a center of the plasticized region.