公开(公告)号：US12237723B2

公开(公告)日：2025-02-25

申请号：US17412585

申请日：2021-08-26

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Chuan Deng ,  Guohua Du ,  Yigang Yuan

IPC: H02K1/27 ,  B60K1/00 ,  B60L50/60 ,  H02K1/276 ,  H02K21/14 ,  H02K29/03

Abstract: An electric machine includes a stator rotatably supporting a rotor, the rotor includes a stacked rotor laminations forming a rotor core with cavities having magnets arranged in the cavities through at least two adjacent rotor laminations and parallel to a rotor central axis, each lamination including an outer edge having grooves or scallops arranged asymmetrically about the circumference to reduce torque ripple. At least one groove or scallop may be arranged along a q-axis and at least one groove or scallop may be arranged between a q-axis and a d-axis of the rotor core. The laminations may be substantially identical with a first group of laminations flipped or rotated about a diametric axis relative to a second group of laminations. An electrified vehicle includes an electric machine powered by a traction battery, the electric machine having a rotor core with stacked rotor laminations having a scalloped outer edge.

公开(公告)号：US12074489B2

公开(公告)日：2024-08-27

申请号：US17859483

申请日：2022-07-07

Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA

Inventor： Takayuki Kobayashi ,  Hirotaka Kurita ,  Tatsuya Hagiwara ,  Takumi Sugimura

IPC: H02K29/03 ,  H02K1/16 ,  H02K1/2713 ,  H02K3/12 ,  H02K3/34 ,  H02K21/24

CPC classification number: H02K29/03 ,  H02K1/16 ,  H02K1/2713 ,  H02K3/12 ,  H02K3/34 ,  H02K21/24

Abstract: An axial gap motor having a rotor and a stator core. A plurality of pressed powder teeth extends in a radial direction of the stator core and each has a trapezoidal shape in which a circumferential length of a pressed-powder-tooth-radial-direction-outer-end portion is larger than a circumferential length of a pressed-powder-tooth-radial-direction-inner-end portion. The rotor includes a plurality of field magnets, each configured such that a circumferential length of a magnet-radial-direction-inner-end portion is greater than or equal to a circumferential length of a magnet-radial-direction-outer-end portion. When the rotor and the stator core rotate relative to each other about a rotation axis, a part of the field magnets first overlaps with pressed-powder-tooth-radial-direction-inner portions of pressed powder teeth, and while the field magnets are located at a q-axis position with respect to the pressed powder teeth, adjacent ones of the field magnets individually overlap with one pressed powder tooth.

公开(公告)号：US11996740B2

公开(公告)日：2024-05-28

申请号：US17439017

申请日：2019-03-26

Applicant: Mitsubishi Electric Corporation

Inventor： Takanori Watanabe ,  Koji Yabe

IPC: H02K1/27 ,  F04C29/00 ,  H02K1/276 ,  H02K29/03

CPC classification number: H02K1/2766 ,  F04C29/0085 ,  F04C2240/40 ,  H02K29/03 ,  H02K2213/03

Abstract: A rotor includes a rotor core and a permanent magnet. The rotor core includes an outside slit provided between a permanent magnet insertion hole and an outer peripheral surface of the rotor core, and inside slits provided between a magnetic pole center part and the outside slit. A minimum distance from a first inside slit to the outer peripheral surface of the rotor core is longer than a minimum distance from any other inside slit except the first inside slit to the outer peripheral surface of the rotor core.

公开(公告)号：US20240128845A1

公开(公告)日：2024-04-18

申请号：US17975957

申请日：2022-10-28

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Chengwu Duan ,  Denghao Fan ,  Vincent Fedida ,  Thomas W. Nehl

IPC: H02K29/03 ,  B60L50/60 ,  H02K21/24

CPC classification number: H02K29/03 ,  B60L50/60 ,  H02K21/24 ,  H02K2201/06

Abstract: A member for an axial flux electric machine, in accordance with a non-limiting example, includes a support member having a first surface, a second surface opposite the first surface, an outer annular edge, and an inner annular edge that defines an opening having a center point. A plurality of members is mounted on one of the first surface and the second surface. Each of the plurality of members has a centerline that passes through the outer annular edge and the inner annular edge without passing through the center point creating a torque ripple reducing asymmetry in the member.

公开(公告)号：US20240039382A1

公开(公告)日：2024-02-01

申请号：US17967887

申请日：2022-10-17

Applicant: SHENZHEN CITY WANZHIDA MOTOR MANUFACTURE CO., LTD.

Inventor： Mengkun Weng ,  Song Zhang ,  Zongqian Qi

IPC: H02K29/03 ,  H02K3/52 ,  H02K5/16 ,  H02K7/08 ,  A45D20/00

CPC classification number: H02K29/03 ,  H02K3/522 ,  H02K5/163 ,  H02K7/085 ,  A45D20/00 ,  H02K2203/03

Abstract: A high-speed hairdryer brushless motor includes an outer housing, a stator assembly and a rotor assembly. The stator assembly includes a stator core and a coil assembly. The stator core includes a yoke portion and a teeth portion. The teeth portion includes an inner cylinder body and N outer teeth. The inner wall of the inner cylinder body is a complete cylindrical surface. N magnetic insulating grooves are provided on the outer wall of the inner cylinder body, each magnetic insulating groove being provided axially along an entire length of the inner cylinder body. The coil assembly is wound on the outer teeth of the teeth portion. Each magnetic insulating groove is a V-shaped groove that opens toward the exterior of the inner cylinder body. The rotor assembly includes a rotating shaft and a rotor magnet. An air gap is provided between the rotor magnet and the cylindrical surface.

公开(公告)号：US11831206B2

公开(公告)日：2023-11-28

申请号：US17213671

申请日：2021-03-26

Applicant: Ohio State Innovation Foundation

Inventor： Bradley Losey ,  Marcelo Dapino

IPC: H02K1/27 ,  H02K16/02 ,  H02K1/2792 ,  H02K29/03 ,  H02K3/28

CPC classification number: H02K1/2792 ,  H02K3/28 ,  H02K16/02 ,  H02K29/03 ,  H02K2213/03

Abstract: An exemplary axial cladding magnet magnetically-geared machine is disclosed comprising Halbach array cladding magnets located on the axial ends of the magnetically-geared machine. The Halbach array cladding magnets can be used to increase the magnetic efficiency and torque transmission of the magnetically-geared machine by mitigating end-effect losses.

公开(公告)号：US11824411B2

公开(公告)日：2023-11-21

申请号：US17456531

申请日：2021-11-24

Applicant: Hunan University of Science and Technology

Inventor： Xiaoping Zhang ,  Donghao Liu ,  Bo Fu

IPC: H02K29/03 ,  H02K1/16

CPC classification number: H02K29/03 ,  H02K1/165 ,  H02K2201/03 ,  H02K2213/03

Abstract: To solve the problem of large electromagnetic noise in AC traction motor, embodiments have open square notches at symmetrical positions on both sides of stator teeth of AC traction motor to effectively reduce electromagnetic noise without affecting other performance indicators of motor. In addition, embodiments fit the functional relationship between the optimal notch size or optimal slotting position size of motors and their power by determining the optimal notch size or optimal slotting position size of motors with different power grades, so as to achieve the noise reduction effect.

公开(公告)号：US11824408B2

公开(公告)日：2023-11-21

申请号：US16966814

申请日：2019-01-30

Applicant: LG Electronics Inc.

Inventor： Dongseok Ryu ,  Kiman Kim ,  Sangjoon Eum

IPC: H02K16/02 ,  F25B1/02 ,  H02K29/03 ,  H02K1/2791 ,  H02K1/278

CPC classification number: H02K16/02 ,  F25B1/02 ,  H02K1/278 ,  H02K1/2791 ,  H02K29/03

Abstract: A dual rotor-type motor according to an embodiment of the present invention comprises: a stator around which a coil is wound; an outer rotor; and an inner rotor, wherein the inner rotor and the outer rotor have different initial angles, and thus the inner rotor and the outer rotor are misaligned from each other corresponding to the difference between the initial angles thereof. Therefore, the present invention can reduce torque ripple by a relatively simple method, and thus can improve efficiency of a motor and reduce vibration and noise.

公开(公告)号：US11799338B2

公开(公告)日：2023-10-24

申请号：US17270771

申请日：2019-08-27

Applicant: LG INNOTEK CO., LTD.

Inventor： Seong Jin Kim ,  Gi Chang Moon ,  Jin Su Pyeon

IPC: H02K1/27 ,  H02K1/14 ,  H02K1/278 ,  H02K21/16 ,  B62D5/04 ,  H02K29/03

CPC classification number: H02K1/278 ,  H02K1/148 ,  H02K21/16 ,  B62D5/0463 ,  H02K29/03

Abstract: An embodiment relates to a motor comprising: a shaft; a rotor engaged with the shaft; and a stator disposed outside the rotor, wherein the stator includes a stator core formed by stacking a plurality of sheets and a coil wound around the stator core, the stator core including a yoke having a hole formed therein, a tooth protruding radially from the yoke, and an adhesive member disposed in the hole, the hole being disposed on an imaginary line L extending radially along the side of the tooth. Accordingly, the motor can form a stator core by stacking sheets, and reduce noise and vibration by filling an adhesive member in a hole formed in the stator core.

公开(公告)号：US11750070B2

公开(公告)日：2023-09-05

申请号：US18068184

申请日：2022-12-19

Applicant: Falcon Power, LLC

Inventor： Harley C. McDonald ,  James L. Bailey ,  Matthew C. McDonald

IPC: H02K11/28 ,  H05K7/20 ,  H03K3/011 ,  H03K17/687 ,  H02K1/20 ,  H02K3/24 ,  H02K5/20 ,  H02K9/197 ,  H02K1/16 ,  H02K1/278 ,  H02K29/03 ,  H02K5/10

CPC classification number: H02K11/28 ,  H02K1/16 ,  H02K1/20 ,  H02K1/278 ,  H02K3/24 ,  H02K5/20 ,  H02K9/197 ,  H02K29/03 ,  H03K3/011 ,  H03K17/6871 ,  H05K7/209 ,  H02K5/10 ,  H02K2213/03

Abstract: An electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.