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公开(公告)号：US20240312680A1
公开(公告)日：2024-09-19
申请号：US18556663
申请日：2022-04-11
Inventor： SHINICHIRO ITO , MASAKI TANAKA , AKIHIKO WATANABE , KOICHI KUSUKAME , KEIICHIRO NUKADA , YU NISHITANI , YUKIHIRO KANEKO
CPC classification number: H01F1/0304 , G01P3/4815 , H01F1/113 , H01F3/06 , H01F41/18 , H01F2003/106
Abstract: Provided are a power generation element, an encoder, and a method of manufacturing a magnetic member capable of increasing generated power. Power generation element includes magnetic member that produces a large Barkhausen effect, coil wound around magnetic member, and ferrite member provided at an end of magnetic member to be aligned with coil along a winding axis direction of coil. Ferrite member includes main body located inside columnar space and protrusion connected to main body and located outside columnar space. Columnar space is surrounded by a virtual plane when it is assumed that an outer edge of coil when viewed from the winding axis direction of coil is extended to both sides of the coil in the winding axis direction of coil, and is sandwiched between two virtual planes that are in contact with both ends of magnetic member in the winding axis direction of coil and are orthogonal to the winding axis direction.
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Patent Agency Ranking
公开(公告)号：US20250038626A1
公开(公告)日：2025-01-30
申请号：US18716223
申请日：2022-11-02
Inventor： YASUYUKI YOKOUCHI , AKIHIKO WATANABE
Abstract: A discharge phenomenon of a bearing is detected with high accuracy. Electric motor (10) includes stator (11) including stator core (11a) with winding (11b) wound around stator core (11a), rotor (12) facing stator (11) and including rotating body (13) and shaft (14), first and second bearings (15a, 15b) that are a pair of bearings, first and second brackets (19a, 19b) that are a pair of brackets respectively fix outer rings (17) of the pair of bearings, conductor (21), and current detector (22). Each of the pair of bearings includes inner ring (16) and outer ring (17) and supports shaft (14) with inner ring (16). Conductor (21) electrically connects outer ring (17) of first bearing (15A) and outer ring (17) of second bearing (15B) or stator core (11a). Current detector (22) detects a discharge current flowing through conductor (21) accompanying discharge in first bearing (15A) or second bearing (15B).
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3.发明公开公开(公告)号：US20240200987A1
公开(公告)日：2024-06-20
申请号：US18555516
申请日：2022-04-11
Inventor： SHINICHI TSUTSUMI , KEIICHIRO NUKADA , TOMOYUKI MURANISHI , AKIHIKO WATANABE
CPC classification number: G01D5/245 , H01F27/24 , H01F27/28 , G01D2205/26
Abstract: Provided are a power generation element, an encoder, a method of manufacturing a magnetic member, and a signal acquisition method capable of reducing variations in generated power. Power generation element includes: magnetic member that produces a large Barkhausen effect by a change in an external magnetic field; and coil wound around magnetic member. Magnetic member includes first magnetic sensing part and second magnetic sensing part having softer magnetism than first magnetic sensing part. First magnetic sensing part is magnetized in a winding axis direction of coil, and a magnetization direction does not change due to a change in a direction of the external magnetic field.
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公开(公告)号：US20200028404A1
公开(公告)日：2020-01-23
申请号：US16483726
申请日：2018-01-26
Inventor： YOSHIKAZU YAMAGATA , AKIHIKO WATANABE , TAKANORI AMAYA , IKUO OZAKI
Abstract: An electric motor includes: a stator that has a stator core and has coils that are formed of an electric wire wound on the stator core and form a plurality of phases; a resin covering the stator; and a wire break facilitator that facilitates the electric wire to break at a time of abnormality. In the electric motor having the stator in which the coils are covered with molding resin, the wire break facilitator is attached to at least one of: a transition wire part between the coils wound on the stator core; a connection part at a neutral point; and a connection part of a lead wire.
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公开(公告)号：US20220320932A1
公开(公告)日：2022-10-06
申请号：US17607923
申请日：2020-05-21
Inventor： HIROKI SAKAGUCHI , YOSHIHARU NAKAMURA , SHOICHI KOYAMA , TOSHIKIYO KAWAMURA , KIYOMI KAWAMURA , HIDEYUKI TANIGUCHI , AKIHIKO WATANABE
Abstract: A coil is configured with stacked n turns (where n is an integer of 2 or more) of spirally wound conductive wire having a rectangular cross-section. A k-th turn (where k is an integer and 1≤k≤n) of the coil has at least a straight portion and a corner portion extending from an end part of the straight portion. On an outer peripheral surface of the corner portion, there are formed at least a first bent portion bent toward an inner peripheral side and a second bent portion bent toward the outer peripheral side, and curvature C1 of the first bent portion is different from curvature C2 of second bent portion.
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公开(公告)号：US20200006991A1
公开(公告)日：2020-01-02
申请号：US16484761
申请日：2018-02-26
Inventor： YOSHIKAZU YAMAGATA , AKIHIKO WATANABE , TAKANORI AMAYA , YASUO NANBU , HISAAKI KATO , YASUNORI WAKAMORI , MASAYUKI TANIGUCHI
Abstract: A molded motor of the present invention includes a rotor, a stator, a pair of shaft bearings, a pair of metal brackets, and a molding resin. The rotor has: a rotary shaft extending in a shaft direction; and a rotary body that has a permanent magnet and is fixed to the rotary shaft. The stator has: a stator core on which a plurality of salient poles are formed; and a plurality of coils each wound on each salient pole via an insulator, where the stator is covered by the molding resin and is disposed to face the rotor. The pair of metal brackets each fix each of the shaft bearings, and the shaft bearings rotatably support the rotor. Further, the rotary body has a dielectric layer formed between the rotary shaft and an outer peripheral surface of the rotary body. A metal member is provided, on an outer peripheral side of a coil end of the coil and on at least a part facing the coil end, in a circumferential direction.
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