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1.发明申请公开(公告)号：US20190013127A1
公开(公告)日：2019-01-10
申请号：US16019458
申请日：2018-06-26
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.
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公开(公告)号：US20210336516A1
公开(公告)日：2021-10-28
申请号：US17219961
申请日：2021-04-01
Inventor： YUKIO NISHIKAWA , MITSUO SAITOH
Abstract: A manufacturing method of manufacturing an iron core includes connecting a plurality of iron core pieces each including a tooth portion and a yoke portion in a strip shape, connecting the iron core pieces adjacent to each other by a connection portion, and forming a continuous iron core piece provided line-symmetrically with reference to the connection portion. A laminated body is formed by bending and superimposing the iron core pieces adjacent to each other while the connection portion is used as a symmetry axis. A pressure is applied in a laminating direction of the laminated body to fix the laminated body, and a coil is provided in the tooth portion. In this manner, it is possible to realize a manufacturing method of an iron core, which have a high material yield, high productivity, and excellent magnetic properties by using a thin iron core piece.
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Patent Agency Ranking
公开(公告)号：US20190181700A1
公开(公告)日：2019-06-13
申请号：US16278527
申请日：2019-02-18
Inventor： YUKIO NISHIKAWA , MITSUO SAITOH
Abstract: An iron core including a laminate of a plurality of fixed electromagnetic steel sheets, a laminate of alloy thin strips which is sandwiched between the laminate of the electromagnetic steel sheets, a fastening mechanism which penetrates the laminates of electromagnetic steel sheets and alloy thin strips, and a fixing base. The laminate of alloy thin strips reduces compressive and torsional forces acting on the laminate of alloy thin strips by using the iron core having a structure in which upper and lower portions of a laminate of alloy thin strips having nanocrystal grains are sandwiched together with laminates of amorphous alloy thin strips. Furthermore, a motor including a rotor and the above-described iron core is used.
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公开(公告)号：US20220410241A1
公开(公告)日：2022-12-29
申请号：US17805457
申请日：2022-06-04
Inventor： HIDEAKI HAMADA , MITSUO SAITOH , NAOKI NOJIRI
Abstract: Provided is a press-forming apparatus including: a punch; a die having an inclined surface inclined toward a hollow part into which the punch is inserted and; a die plate holding the die; a blank holder having a holding surface facing the inclined surface of the die; a die load sensor detecting a load in a pressing direction, a load in a first direction perpendicular to the pressing direction, and a load in a second direction perpendicular to the first direction; a controller that calculates a normal force of the die based on the loads in the pressing direction, in the first direction, and in the second direction, the loads being detected by the die load sensor, and calculates the amount of correction of clearance between the die and the blank holder based on the normal force of the die; a first driver that moves the die in the pressing direction based on the amount of correction of clearance; and a second driver that drives the punch in the pressing direction.
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公开(公告)号：US20210152061A1
公开(公告)日：2021-05-20
申请号：US17159621
申请日：2021-01-27
Inventor： YUKIO NISHIKAWA , MITSUO SAITOH , NAOKI NOJIRI
Abstract: There is provided a method of manufacturing a stator, including: an adjustment step of adjusting a thickness of a laminated body including a laminated group of soft magnetic alloy strips containing, in whole or in part, soft magnetic alloy strips obtained by heat-treating amorphous alloy strips and metal plates, the metal plates sandwiching the laminated group; a winding step of fastening the laminated body to a base and performing winding at a predetermined prat of the laminated body in a laminating direction; a removal step of releasing the fastening of the laminated body to the base and removing foreign matters from an end surface of the laminated body; and a fastening step of fastening the laminated body to the base again.
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公开(公告)号：US20210226515A1
公开(公告)日：2021-07-22
申请号：US17221573
申请日：2021-04-02
Inventor： YUKIO NISHIKAWA , MITSUO SAITOH
Abstract: A motor includes: a stator that includes a laminated group of soft magnetic alloy strips that are laminated and is fastened to a base by a bolt that penetrates the laminated group in a direction of laminating the soft magnetic alloy strips; and a rotor that is rotatably installed on the base. A resin layer is provided at least on a laminated end surface closest to the bolt, in the laminated end surface of the stator.
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公开(公告)号：US20190156976A1
公开(公告)日：2019-05-23
申请号：US16300232
申请日：2017-04-04
Inventor： MITSUO SAITOH , YOSHIE TAKAHASHI , TAKAO KUROMIYA , TOSHIYUKI KOJIMA
Abstract: A dust core including an iron-based magnetic powder containing iron as a main component, including: a first magnetic powder which has a first peak in a particle size distribution of the iron-based magnetic powder; and a second magnetic powder which has a second peak corresponding to a particle size larger than a particle size corresponding to the first peak in the particle size distribution of the iron-based magnetic powder, and of which a crystal structure is nanocrystal or amorphous, in which a particle of the first magnetic powder and a particle of the second magnetic powder are in a state of being bonded to each other.
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