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公开(公告)号：US20240146170A1
公开(公告)日：2024-05-02
申请号：US18406152
申请日：2024-01-07
IPC分类号： H02K41/03 , H02K1/12 , H02K1/2753 , H02K3/28 , H02K3/47
CPC分类号： H02K41/031 , H02K1/12 , H02K1/2753 , H02K3/28 , H02K3/47
摘要： Halbach array of magnetically isotropic electromagnets, comprised of loosely-wound, spring-like nested electromagnetic coils, wound and arranged in close proximity in Halbach array sequence, encased in various combinations of powered magnetic metal composite and binder, formed, wired, and assembled to serve as a stator and/or rotor of an electric motor or generator.
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公开(公告)号：US11949311B2
公开(公告)日：2024-04-02
申请号：US16068681
申请日：2017-10-26
IPC分类号： H02K41/03 , H02K1/12 , H02K1/2753 , H02K3/28 , H02K3/47
CPC分类号： H02K41/031 , H02K1/12 , H02K1/2753 , H02K3/28 , H02K3/47
摘要： Halbach array of magnetically isotropic electromagnets, comprised of loosely-wound, spring-like nested electromagnetic coils, wound and arranged in close proximity in Halbach array sequence, encased in various combinations of powdered magnetic metal composite and binder, formed, wired, and assembled to serve as a stater and/or rotor of an electric motor or generator.
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公开(公告)号：US11909293B2
公开(公告)日：2024-02-20
申请号：US17670880
申请日：2022-02-14
发明人： Jørg Høyland
IPC分类号： H02K1/278 , H02K5/02 , H02K1/2753
CPC分类号： H02K5/02 , H02K1/2753
摘要： A rotor sleeve (46) for a rotor (29) of an electric machine (28). The sleeve comprises a plurality of layers (66a, 66b) of carbon fibre reinforced polymer,
each layer (66a, 66b) comprising fibres (68) oriented substantially 90° to a rotational axis (X) and at least one layer (72a) of fibres (74) having a lower modulus of elasticity provided between layers (66a, 66b) of carbon fibre reinforced polymer. The lower modulus of elasticity fibres (74) are oriented between 50° and 75° relative to the rotational axis (X).-
公开(公告)号：US20240014700A1
公开(公告)日：2024-01-11
申请号：US18254603
申请日：2021-09-28
申请人： NIDEC CORPORATION
发明人： Yukie YAMADA , Tomoya UEDA
IPC分类号： H02K1/2753
CPC分类号： H02K1/2753
摘要： A rotor includes a rotor core having a hole, and a magnet inside the hole. A stator includes a stator core having an annular core back surrounding the rotor core and teeth extending inward from the core back and arranged at intervals in a circumferential direction, and coils attached to the stator core. The hole has an arc shape protruding inward. The magnet is in the hole and has an arc shape extending along the hole. The rotor core has cavity portions sandwiching the magnet. A curved outer surface of the hole is in close contact with a curved outer surface of the magnet at a portion closer to a center in the circumferential direction than an end portion in the circumferential direction. At least a part of the cavity portion extends to the outer side in the circumferential direction with respect to the center of a pole.
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公开(公告)号：US11966184B2
公开(公告)日：2024-04-23
申请号：US17673300
申请日：2022-02-16
发明人： Junya Takatsu , Junichi Hirota
CPC分类号： G03G15/5008 , H02P21/22 , H02P25/03 , H02K1/2753 , H02K3/18 , H02P27/08
摘要： One aspect is an image forming apparatus including a motor that drives a first member, a second member, a movement member that moves between a first position where the first and second members contact and a second position where the first and second members are separated, and a controller that receives an instruction to start a print job for forming an image on a recording medium, and executes an initial operation for determining a phase of a rotor of the motor in a stopping state of the rotor based on current flowing through a coil of the motor by supplying current to the coil in the stopping state in a state where the movement member is located at the first position, to control the current supplied to the coil to rotate the rotor in the stopping state based on the phase determined in the initial operation.
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公开(公告)号：US20220360125A1
公开(公告)日：2022-11-10
申请号：US17732512
申请日：2022-04-28
发明人： Andrej Cernigoj , Nejc Volk , Blaz Vitez
IPC分类号： H02K1/2753 , H02K15/03
摘要： A rotor for an electric machine may include a stack of ferrous laminations and a rotor core. The stack may be divided into a plurality of segments in a circumferential direction. At least one permanent magnet may be arranged between two adjacent segments of the plurality of segments. Each of the plurality of segments may have an opening extending in a radial direction outwards from a radially inner surface. The rotor core may connect the two adjacent segments. The rotor core may be formed via casting a non-ferrous material in a space disposed radially inwards of the plurality of segments and into the radially outwards extending opening of each of the plurality of segments. The opening of each of the plurality of segments may have a generally fir-tree shaped section profile.
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公开(公告)号：US11424652B2
公开(公告)日：2022-08-23
申请号：US17073637
申请日：2020-10-19
摘要： A lubricant supported electric motor including a stator presenting a stator raceway, and a rotor extending along an axis and rotatable relative to the stator. The rotor presents a rotor raceway disposed in spaced relationship with the stator raceway to define a gap there between. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The rotor includes a plurality of rotor poles arranged adjacent the rotor raceway in circumferentially spaced relationship with one another, and the stator includes a plurality of stator poles extending radially towards the rotor in circumferentially spaced relationship with one another along the stator raceway. A plurality of stator coil windings are wrapped around the plurality of stator poles and individually controllable for generating a magnetic force to center the rotor within the stator with carefully-timed adjustments to magnetic fields generated by the stator.
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公开(公告)号：US11255931B2
公开(公告)日：2022-02-22
申请号：US16748934
申请日：2020-01-22
申请人： DENSO CORPORATION , SOKEN, INC.
摘要： A torsion bar of a torque detection device converts torque applied between an input shaft and an output shaft to a torsional displacement. A pair of yokes is secured to the output shaft, and forms a magnetic circuit in a magnetic field of a multipolar magnet secured to the input shaft. A magnetic flux guide member has a main body facing the yoke to guide magnetic flux of the magnetic circuit. A magnetic sensor is placed at an extension, and detects magnetic flux guided by the magnetic flux guide member. The magnetic flux guide member is configured to allow magnetic permeance per unit area between the magnetic flux guide member and the yoke to be greater at a location in the main body from which the extension is branched, than at a circumferential end portion of the main body.
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公开(公告)号：US20240283314A1
公开(公告)日：2024-08-22
申请号：US18587811
申请日：2024-02-26
IPC分类号： H02K3/24 , H02K1/2753 , H02K3/28 , H02K16/00
CPC分类号： H02K3/24 , H02K1/2753 , H02K3/28 , H02K16/00 , H02K2201/03
摘要： An axial flux electrical machine, such as an electric motor, dynamo, pump, generator, or alternator has a casing with vents or openings enabling cooling or pumped media to flow into and out of the casing when the rotor of the electrical machine rotates. The stator is formed from conductive elements connected at their axial outer regions by interconnecting members. Conductive elements have a gap or space to direct cooling through the winding to the central region. Each conductive element has legs bent in opposing directions relative to the starting plane of the conductor closest to the central axis then the second leg is bent back in the direction of the first. A portion of the windings of the stator are spaced apart to allow media to flow between the windings to the central axis area and then is allowed flow outward between the rotor and the stator.
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公开(公告)号：US12027921B2
公开(公告)日：2024-07-02
申请号：US16953845
申请日：2020-11-20
发明人： Jungwoo Park , Cheo Park , Byoungsoo Ko , Dongbum Lee , Jonghyun Choi
IPC分类号： H02K1/27 , H02K1/14 , H02K1/18 , H02K1/2753 , H02K1/2791 , H02K5/08 , H02K15/02
CPC分类号： H02K1/2791 , H02K1/146 , H02K1/187 , H02K1/2753 , H02K5/08 , H02K15/02
摘要： A motor having a compact volume by reducing sizes in axial and radial directions includes a stator, and a rotor arranged outside the stator and rotated by electromagnetically interacting with the stator, wherein the rotor includes a ring-shaped back yoke, a plurality of magnets separately arranged inside of the back yoke along a circumferential direction of the back yoke, and a frame arranged to combine the back yoke and the plurality of magnets, and having an open side through which an outer surface of the back yoke is exposed to an outside of the frame.
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