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公开(公告)号：US12095323B2
公开(公告)日：2024-09-17
申请号：US17056268
申请日：2019-08-30
Inventor： Toshiyuki Tamamura , Kiyomi Kawamura , Keiichiro Nukada
Abstract: A motor includes a stator and a rotor at a predetermined distance from the stator. The stator includes an annular yoke, a plurality of teeth connected to the inner circumference of the yoke, and a plurality of coils each wound around an associated one of the teeth. Each coil has coil ends at both ends in an axial direction. At least one of the coil ends has, in an end surface thereof in the axial direction, a first recess extending along the radius of the stator. The first recess houses a first wiring member connecting the coils together.
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公开(公告)号：US11811282B2
公开(公告)日：2023-11-07
申请号：US17285457
申请日：2019-10-17
Inventor： Hajime Ukaji , Mitsuoki Hishida , Kiyomi Kawamura , Toshiyuki Tamamura
Abstract: A coil device includes a first coil including a plate-shaped first coil body having a first and second end. The first coil body is spirally wound on a columnar portion along the extending direction of the columnar portion such that the second end is positioned on one side in the extending direction relative to the first end. The coil device further includes a second coil including a plate-shaped second coil body having a third end and a fourth end. The second coil body is spirally wound on the columnar portion along the extending direction such that the third end is positioned on the one side in the extending direction relative to the second end of the first coil, and the fourth end is positioned on the one side in the extending direction relative to the third end. The second coil is in electrically parallel connection with the first coil.
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Patent Agency Ranking
公开(公告)号：US12021424B2
公开(公告)日：2024-06-25
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
CPC classification number: H02K3/18 , H02K1/146 , H02K1/24 , H02K3/28 , H02K3/522 , H02K15/045 , H02K15/095 , H02K2213/03
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：US09893575B2
公开(公告)日：2018-02-13
申请号：US14778575
申请日：2014-03-20
Inventor： Kiyomi Kawamura , Hiroaki Kawasaki , Yuichi Yoshikawa , Yasushi Kato , Haruhiko Kado , Noritaka Aso
CPC classification number: H02K1/2706 , H02K1/02 , H02K1/14 , H02K1/16 , H02K1/276 , H02K3/12 , H02K15/03 , H02K2213/03
Abstract: A permanent-magnet-embedded electric motor includes a stator having a coil wound on a stator core, and a rotor disposed rotatably inside the stator through a gap to an inner circumferential surface of the stator core. The rotor is provided with a rotor core formed of laminated steel plates having a plurality of magnet-embedding holes, and a permanent magnet housed and retained in each of the magnet-embedding holes. A thickness of the bridge portions formed between edges of the magnet-embedding holes and an outer circumference of the rotor core, and a thickness of a thinned link portion connecting adjoining two of the bridge portions are thinner than a thickness of the steel plates.
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公开(公告)号：US11411452B2
公开(公告)日：2022-08-09
申请号：US17041019
申请日：2019-04-10
Inventor： Yuya Maeda , Toshiyuki Tamamura , Mitsuoki Hishida , Kiyomi Kawamura
Abstract: A coil is a coil of a conductive wire that has a quadrangular cross section, that is spirally wound and laminated to have a series of turns including first to n-th turns (n is an integer of 3 or more), and that is provided, on at least some of the first to n-th turns in the coil, with deformed portions representing recesses each having a shape different from a shape of another portion of the conductive wire. In each of the first and n-th turns respectively lying at both ends of the series of turns, an outer surface lying on a side opposite to a center of the series of turns extends flush along with a plane intersecting the series of turns.
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公开(公告)号：US20210249924A1
公开(公告)日：2021-08-12
申请号：US17056268
申请日：2019-08-30
Inventor： Toshiyuki Tamamura , Kiyomi Kawamura , Keiichiro Nukada
Abstract: A motor includes a stator and a rotor at a predetermined distance from the stator. The stator includes an annular yoke, a plurality of teeth connected to the inner circumference of the yoke, and a plurality of coils each wound around an associated one of the teeth. Each coil has coil ends at both ends in an axial direction. At least one of the coil ends has, in an end surface thereof in the axial direction, a first recess extending along the radius of the stator. The first recess houses a first wiring member connecting the coils together.
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公开(公告)号：US10348141B2
公开(公告)日：2019-07-09
申请号：US15266587
申请日：2016-09-15
Inventor： Hu Li , Yuichi Yoshikawa , Hiroshi Murakami , Haruhiko Kado , Kiyomi Kawamura
Abstract: A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M
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