公开(公告)号：US20240356399A1

公开(公告)日：2024-10-24

申请号：US18684988

申请日：2021-08-31

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Toru WATANABE

IPC: H02K1/278

CPC classification number: H02K1/278 ,  H02K2201/03

Abstract: A motor includes: a rotor including a yoke, a first magnet, and a second magnet opposing the first magnet; and a stator. The yoke includes a hole and a frame surrounding the hole. The first magnet is disposed in the hole of the yoke. The second magnet includes a first surface opposing the frame of the yoke in the peripheral direction and a second surface opposing the stator in the radial direction.

公开(公告)号：US20240291364A1

公开(公告)日：2024-08-29

申请号：US18176193

申请日：2023-02-28

Applicant: ePropelled Inc.

Inventor： Nabeel Ahmed Shirazee ,  Manikandan Adhimoolam

IPC: H02K16/02 ,  H02K1/2795

CPC classification number: H02K16/02 ,  H02K1/2795 ,  H02K2201/03

Abstract: A permanent magnet electrical machine comprises a stator 12 having a plurality of stator coils 15 extending around respective stator teeth 14, the coils 15 having respective coil axes extending parallel to the rotational axis of the machine. A rotor 20 axially spaced apart from the stator 12 has a plurality of circumferentially arranged permanent magnets 21. The stator teeth 14 and magnets 21 comprise opposed faces on opposite sides and an air gap 23, the faces being of a complementary profile having both a radially facing, in-between facing and an axially-facing component of inclination relative to the rotational axis of the machine. The inclination of the opposed faces maximises the active surface area for magnetic flux thereby substantially increasing the power density and efficiency of the motor compared with conventional axial flux machines.

公开(公告)号：US12068648B2

公开(公告)日：2024-08-20

申请号：US17617656

申请日：2020-06-16

Applicant: Sinfonia Technology Co., Ltd.

Inventor： Hiroki Wakabayashi ,  Takakuni Iitsuka ,  Yutaka Wakita ,  Tetsuhiro Tomita

IPC: H02K3/24 ,  H02K1/16 ,  H02K1/20 ,  H02K9/19

CPC classification number: H02K3/24 ,  H02K1/165 ,  H02K1/20 ,  H02K9/19 ,  H02K2201/03

Abstract: There is provided motor, including: a stator including a plurality of laminated plates; and a rotor arranged inside the stator with a gap between the rotor and the stator, wherein the stator further includes an annular yoke located outside of the stator and a plurality of teeth protruding from an inner peripheral surface of the yoke toward the rotor, wherein slots in which coils wound around the teeth are arranged are formed between the teeth that are adjacently arranged, wherein gaps to which a cooling medium is supplied are formed between bottom portions of the slots and the coils, and wherein the stator further includes end plate members arranged so as to face the laminated plates.

公开(公告)号：US20240186871A1

公开(公告)日：2024-06-06

申请号：US17798317

申请日：2022-02-11

Applicant: ZHEJIANG GEELY HOLDING GROUP CO.,LTD. ,  Wuxi InfiMotion Technology Co., Ltd.

Inventor： Shengchuan ZHANG ,  Xuebo XIONG ,  Liang FANG ,  Tao HAN ,  Haisheng YU ,  Yanjun TAN ,  Xiaozhe LIN ,  Ruiping WANG ,  INGO SCHOLTEN

IPC: H02K16/00 ,  H02K1/16 ,  H02K1/2796 ,  H02K1/2798

CPC classification number: H02K16/00 ,  H02K1/16 ,  H02K1/2796 ,  H02K1/2798 ,  H02K2201/03

Abstract: A stator-and-rotor structure and an axial magnetic field motor are provided. The stator-and-rotor structure is a dual-stator and dual-rotor structure. Permanent magnets of the outer rotor is fixed on a rotor yoke portion, the inner rotor has no rotor yoke portion, permanent magnets of the inner rotor is fixed on a rotor support, the inner stator core has no stator yoke portion, and the outer stator core has a stator yoke portion.

公开(公告)号：US20240136875A1

公开(公告)日：2024-04-25

申请号：US18489644

申请日：2023-10-17

Applicant: Nidec Motor Corporation

Inventor： Bruce Ley ,  Michael Coles ,  Hunter Gill ,  Mike Alivero ,  Joe Engle ,  Kyle Chesnut ,  Tillian Jones ,  Jeremy Beck

IPC: H02K1/2793

CPC classification number: H02K1/2793 ,  H02K2201/03

Abstract: An electric motor includes a stator and a rotor rotatable relative to the stator. The rotor includes an axial shaft, a disc projecting radially from the shaft, and a ring magnet affixed to the disc. The shaft and the disc are integrally formed as a unitary body.

公开(公告)号：US11949312B2

公开(公告)日：2024-04-02

申请号：US17633736

申请日：2020-08-10

Applicant: Physik Instrumente (PI) GmbH & Co. KG

Inventor： Bernhard Guddei ,  Michael Hohmann ,  Daniel Göll

IPC: H02K41/03 ,  H02K1/17 ,  H02K5/173

CPC classification number: H02K41/031 ,  H02K1/17 ,  H02K5/173 ,  H02K2201/03

Abstract: The present invention relates to a magnetic guiding device having a stator and a slide movable along a guiding direction relative to the stator, the stator and the slide being magnetized or magnetizable such that a magnetic field extending through the stator and the slide generates a magnetic supporting force on the slide acting along the guiding direction. To improve the running properties of the slide by avoiding differential slip, jerking and varying friction, according to the invention, the magnetic field extending through the stator and the slide simultaneously generates a magnetic pretensioning force which urges the slide and the stator against each other.

公开(公告)号：US20240088729A1

公开(公告)日：2024-03-14

申请号：US18210210

申请日：2023-06-15

Applicant: Rolls-Royce Deutschland Ltd & Co KG

Inventor： Anton RUDENKO ,  Johannes Gabriel BAUER

IPC: H02K1/04 ,  C09D5/00 ,  C09D127/18 ,  H02K21/24

CPC classification number: H02K1/04 ,  B64D27/30 ,  C09D5/00 ,  C09D127/18 ,  H02K21/24 ,  H02K2201/03

Abstract: An electric machine, (e.g., for an aircraft), includes a stator and a rotor that is rotatable relative to the stator, wherein a gap by way of which magnetic forces act between the stator and the rotor is configured between a gap face of the stator and a gap face of the rotor. The electric machine further includes a bearing installation by which the rotor is mounted so as to be rotatable relative to the stator in such a manner that the gap face of the rotor in a normal operation of the electric machine is spaced apart from the gap face of the stator. The stator and/or the rotor have/has a friction-reducing layer that at least partially forms the respective gap face and, along which the respective other gap face, is configured to slide in the event of a defect.

公开(公告)号：US11923733B2

公开(公告)日：2024-03-05

申请号：US17407273

申请日：2021-08-20

Applicant: Quantentech Limited

Inventor： Hengchun Mao

IPC: H02K16/02 ,  H02K17/14

CPC classification number: H02K16/02 ,  H02K17/14 ,  H02K2201/03

Abstract: An apparatus includes a stator with an inner surface and an outer surface, a plurality of rotors magnetically coupled to the stator, wherein a first rotor faces the inner surface of the stator and a second rotor faces the outer surface of the stator, and a first airgap between the inner surface of the stator and the first rotor, and a second airgap between the outer surface of the stator and the second rotor, wherein first conductors, the first airgap, and the first rotor form a first submotor, and second conductors, the second airgap, and the second rotor form a second submotor, and wherein the first submotor and the second submotor are so configured that the first rotor and the second rotor produce mechanical torques in a same direction when currents flow in the plurality of windings in an operation mode.

公开(公告)号：US20240022150A1

公开(公告)日：2024-01-18

申请号：US18218345

申请日：2023-07-05

Applicant: Siemens Gamesa Renewable Energy A/S

Inventor： Ziad Azar ,  Alexander Duke

IPC: H02K21/02 ,  H02K7/18 ,  F03D9/25

CPC classification number: H02K21/025 ,  H02K7/1838 ,  F03D9/25 ,  H02K2201/03 ,  F05B2220/706

Abstract: An electric generator for a wind turbine is provided including a stator or rotor, the stator or rotor having plurality of winding systems, each winding system covering a respective angular portion of the stator or rotor about an axis of rotation of the electric generator, and a controller for controlling the current flowing in the winding systems. The controller is configured for receiving or determining a thickness of an airgap between the stator and the rotor and controlling the current flowing in at least one of the winding systems so that a respective magnetic radial force is generated, the magnetic radial force acting on the stator and/or rotor for increasing the airgap where the airgap is below a threshold airgap value.

公开(公告)号：US11843294B2

公开(公告)日：2023-12-12

申请号：US17046817

申请日：2019-04-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Stijn Willem Boere ,  Jan Willem Bruggers ,  Nathan Farrell ,  Wolter F. Benning ,  Paul Leonard

IPC: H02K21/02 ,  H02K7/08 ,  H02K7/14 ,  A46B9/04 ,  A46B13/02 ,  A61C17/22

CPC classification number: H02K21/026 ,  A46B9/04 ,  A46B13/02 ,  A61C17/22 ,  H02K7/08 ,  H02K7/145 ,  H02K2201/03

Abstract: According to an aspect there is provided a motor (1) for a personal care device (10). The motor (1) comprises: a stator (2) comprising a stator surface; a rotor (3) comprising a rotor surface disposed opposite the stator surface; and a spacer (4) projecting between the stator surface and the rotor surface so as to define a minimum airgap between the stator (2) and the rotor (3). The spacer (4) is disposed on or at one of the rotor surface and the stator surface, and has a contact surface configured to engage with the other one of the rotor surface and the stator surface.