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公开(公告)号：US20240356394A1
公开(公告)日：2024-10-24
申请号：US18687603
申请日：2021-10-29
发明人： Kenta MOTOYOSHI , Hiroko IKEDA , Yuki NISHIMURA , Takashi Takashi , Masafumi OKAZAKI , Shohei FUJIKURA
摘要： A rotor includes a rotor core, a shaft which is disposed inside the rotor core and extends in an axial direction, and a plurality of permanent magnets which are provided in the rotor core, in which the rotor core is provided with a lightening hole, and a number of the lightening hole is different from a number of pole pairs of the plurality of permanent magnets.
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公开(公告)号：US20240159572A1
公开(公告)日：2024-05-16
申请号：US18282609
申请日：2021-04-15
发明人： Hiroko IKEDA , Shohei FUJIKURA , Kenta MOTOYOSHI , Yu HIROTANI , Hidenori SASAKI , Tatsuya MORI
IPC分类号： G01D5/20
CPC分类号： G01D5/2053
摘要： A resolver includes a rotor attached to a shaft of a rotating body, a stator, an excitation circuit, and an angle computation unit configured to compute a rotation angle of the rotor. Each tooth of the stator has line-symmetry with respect to a line connecting a center of a core back of the stator and centers of the teeth in a circumferential direction as viewed from an axial direction. A rotor outline is expressed by a function Rr(x(θ), y(θ)) defined by Equations (1) to (3), where an x and a y axes are axes of an orthogonal coordinate system having a center of the shaft as an origin, and an angle from a reference axis is θ, where a minimum distance from the center of the core back to the teeth is Ri, and a maximum distance is Ro, and a number of salient poles of the rotor is Nx.
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公开(公告)号：US20240022125A1
公开(公告)日：2024-01-18
申请号：US18035933
申请日：2020-11-25
发明人： Kenta MOTOYOSHI , Yuki NISHIMURA , Yu HIROTANI
IPC分类号： H02K1/2706
CPC分类号： H02K1/2706
摘要： A permanent magnet includes a recessed portion to fit therein with a protrusion provide in a rotor core; and, when the shortest distance between outmost part of the recessed portion and an outer periphery's circular arc portion of the magnet is defined as L1, and when the distance between the recessed portion and the outer periphery's circular arc portion is defined as L2 where the distance L2 passes through an intersection point at which a tangential line of outmost part on the recessed portion intersects with a parallel line, which defines as its start point a point from which a changeover to the recessed portion occurs from an adhesion surface between the magnet and the rotor core, and which is in parallel with a radial line extending from the rotor's shaft center toward the center of the magnet, the magnet includes the recessed portion that satisfies L2≥L1.
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公开(公告)号：US20240235294A9
公开(公告)日：2024-07-11
申请号：US18277317
申请日：2021-02-26
发明人： Hidenori SASAKI , Kenta MOTOYOSHI , Yu HIROTANI , Hiroko IKEDA , Shohei FUJIKURA
IPC分类号： H02K1/278
CPC分类号： H02K1/278 , H02K2213/03
摘要： A rotating electrical machine includes a stator and a rotor, the rotor includes a rotor core and a plurality of magnetic poles, the plurality of magnetic poles includes a plurality of magnet poles formed by permanent magnets, and a plurality of dummy poles, the magnet poles and the dummy poles are alternately disposed in both an axial direction and a circumferential direction, non-magnetic holes are provided between the magnet poles and the dummy poles that are adjacent in the axial direction, and when a length of each magnet pole in the axial direction is tm, a length of each dummy pole in the axial direction is tc, a length of each non-magnetic hole in the axial direction is ta, and a length of the rotor core in the axial direction is lc, the rotating electrical machine satisfies tm>tc and lc
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公开(公告)号：US20220224172A1
公开(公告)日：2022-07-14
申请号：US17442747
申请日：2019-05-24
发明人： Hiroko IKEDA , Tatsuya MORI , Kenta MOTOYOSHI , Kodai OKAZAKI , Kenji IKEDA , Yosuke SUGINO , Seiji SAWADA , Kenta KUBO , Toshihiro MATSUNAGA
摘要： In a redundancy resolver device, winding groups of different systems are arranged at different positions in a circumferential direction of a stator core. The winding groups of each system include: an excitation winding group consisting of a plurality of excitation windings, and being connected to corresponding one of excitation circuits; a first output winding group; and a second output winding group. Each of the teeth has corresponding one of the excitation windings wound therearound. When two of the excitation windings belonging to different systems and being arranged side by side is the circumferential direction of the stator core are defined as a first end excitation winding and a second end excitation winding, respectively, the first end excitation winding and the second end excitation winding are applied with excitation signals to generate magnetic fluxes in the same direction of radial directions of the stator core.
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公开(公告)号：US20220037942A1
公开(公告)日：2022-02-03
申请号：US17276538
申请日：2018-11-27
发明人： Kodai OKAZAKI , Kenta MOTOYOSHI , Yuji TAKIZAWA , Hiroko IKEDA , Hidenori SASAKI , Yu HIROTANI , Satoru AKUTSU , Masafumi OKAZAKI , Natsumi SUGI
摘要： A rotor core of a rotating electrical machine has interpole bridges each disposed on an outer circumferential side with respect to a permanent magnet in a non-magnetic portion between the poles, and interpole diameter bridges each surrounded by two permanent magnets and an interpole bridge. The outer circumferential surface of each interpole bridge is formed by a first flat surface. Thus, a path of a magnetic flux passing through a magnetic gap is lengthened, so that a q-axis inductance is reduced. In addition, a width in a radial direction of each interpole bridge and a width in a circumferential direction of each interpole diameter bridge are constant, and each interpole bridge and each interpole diameter bridge are disposed so as to be perpendicular to each other to form a T shape. Thus, the concentration of stress during press-fitting of the permanent magnet into a magnet hole can be reduced.
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公开(公告)号：US20240136874A1
公开(公告)日：2024-04-25
申请号：US18277317
申请日：2021-02-26
发明人： Hidenori SASAKI , Kenta MOTOYOSHI , Yu HIROTANI , Hiroko IKEDA , Shohei FUJIKURA
IPC分类号： H02K1/278
CPC分类号： H02K1/278 , H02K2213/03
摘要： A rotating electrical machine includes a stator and a rotor, the rotor includes a rotor core and a plurality of magnetic poles, the plurality of magnetic poles includes a plurality of magnet poles formed by permanent magnets, and a plurality of dummy poles, the magnet poles and the dummy poles are alternately disposed in both an axial direction and a circumferential direction, non-magnetic holes are provided between the magnet poles and the dummy poles that are adjacent in the axial direction, and when a length of each magnet pole in the axial direction is tm, a length of each dummy pole in the axial direction is tc, a length of each non-magnetic hole in the axial direction is ta, and a length of the rotor core in the axial direction is lc, the rotating electrical machine satisfies tm>tc and lc
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公开(公告)号：US20220149681A1
公开(公告)日：2022-05-12
申请号：US17429355
申请日：2019-03-28
发明人： Kenta MOTOYOSHI , Hidenori SASAKI , Kodai OKAZAKI , Hiroko IKEDA
IPC分类号： H02K1/276
摘要： Provided is a rotating electric machine, including: a stator; and a rotor, wherein the rotor includes: a rotor core having a plurality of holes formed so as to be arranged in a circumferential direction of the rotor; and at least one permanent magnet, wherein the number of magnetic poles of the rotor is “p”, wherein the plurality of holes include a first hole into which the permanent magnet is inserted, and a second hole into which the permanent magnet is not inserted, the first hole including p/2 first holes, the second hole including p/2 second holes, wherein the first hole and the second hole are formed so as to be alternately arranged in the circumferential direction, and wherein the second hole includes a first opening portion that opens to the stator side in a radial direction of the rotor.
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9.发明申请公开(公告)号：US20190148995A1
公开(公告)日：2019-05-16
申请号：US16098513
申请日：2017-01-23
摘要： A permanent magnet synchronous machine includes a stator including a plurality of split core blocks that are continuously arranged in a rotation direction of a rotor. The plurality of split core blocks each includes: a permanent magnet; a pair of teeth arranged on both ends of the permanent magnet so as to sandwich the permanent magnet in the rotation direction; and connection teeth, which are provided on axial end portions of the pair of teeth sandwiching the permanent magnet, and are configured to connect the pair of teeth.
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公开(公告)号：US20180076675A1
公开(公告)日：2018-03-15
申请号：US15557301
申请日：2015-05-26
CPC分类号： H02K1/24 , H02K1/08 , H02K3/18 , H02K3/52 , H02K41/031
摘要： Two teeth on which windings are wound, and a teeth connecting portion disposed between the two teeth, connecting the teeth together, and having a mounting hole formed therein, are arranged in a line in a second direction, which is an arrangement direction. The teeth connecting portion has a support that supports the windings. The support has projections protruding from both end portions in the second direction of the teeth connecting portion to both sides in a first direction which is a width direction, and spaces formed between the projections in the second direction.
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