公开(公告)号：US20240128806A1

公开(公告)日：2024-04-18

申请号：US17976029

申请日：2022-10-28

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Vincent Fedida ,  Chengwu Duan ,  Alan G. Holmes

IPC: H02K1/14 ,  H02K21/24

CPC classification number: H02K1/146 ,  H02K21/24

Abstract: A stator core segment for an axial flux electric motor includes a first lamination step having a first length, a first width, and a first thickness, and a second lamination step having a second length, a second width, and a second thickness. At least one of the second length, the second width, and the second thickness is distinct from corresponding ones of the first length, the first width, and the first thickness.

公开(公告)号：US20240146130A1

公开(公告)日：2024-05-02

申请号：US18074085

申请日：2022-12-02

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Vincent Fedida ,  Alan G. Holmes ,  Chengwu Duan ,  Yusheng Zou

IPC: H02K1/2798 ,  H02K16/02 ,  H02K21/24

CPC classification number: H02K1/2798 ,  H02K16/02 ,  H02K21/24

Abstract: An example rotor includes a rotor yoke having an outer circumference and an inner circumference. The rotor further includes a plurality of rotor ribs on a surface the rotor yoke and extending between the outer circumference and the inner circumference. The rotor further includes a plurality of magnets, each of the plurality of magnets being disposed adjacent to and between two of the plurality of rotor ribs.

公开(公告)号：US20250088047A1

公开(公告)日：2025-03-13

申请号：US18490377

申请日：2023-10-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Vincent Fedida ,  Chengwu Duan ,  Jian Yao ,  Denghao Fan

IPC: H02K1/14 ,  H02K21/24

Abstract: A stator for an electrical machine defines a central axis and has a first stator face facing parallel to the central axis and a second stator face facing parallel to the central axis, with the first stator face and the second stator face facing in opposite directions. The stator includes a plurality of ferromagnetic segments disposed about the central axis, each segment having a pair of parallel faces that face parallel to the central axis of the stator. On each stator face, faces of adjacent segments of the plurality of segments form gaps therebetween, the gaps extending radially relative to the central axis, the gaps on the first stator face being angularly offset relative to the central axis from the gaps on the second stator face.

公开(公告)号：US20240146132A1

公开(公告)日：2024-05-02

申请号：US17987186

申请日：2022-11-15

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Chengwu Duan ,  Vincent Fedida

IPC: H02K1/28 ,  B60L50/10 ,  H02K1/2786

CPC classification number: H02K1/28 ,  B60L50/10 ,  H02K1/2786

Abstract: A rotor segment support member includes an annular body having an outer edge, an inner edge defining an opening, a first surface, and a second surface opposite the first surface. The rotor segment support member has a circumferential axis extending about the annular body and a radial axis extending between the outer edge and a center of the opening through the inner edge. The annular body has a non-uniform cross-section extending along one of the circumferential axis and the radial axis.

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：US20250088054A1

公开(公告)日：2025-03-13

申请号：US18609135

申请日：2024-03-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian Yao ,  Chengwu Duan ,  Vincent Fedida ,  SeungHwan Keum ,  Alan G. Holmes

IPC: H02K1/32 ,  H02K1/24 ,  H02K1/2795 ,  H02K5/20 ,  H02K11/25 ,  H02K16/02

Abstract: A cooled axial flux electric motor includes a rotationally-fixed stator defining a rotational axis and having a plurality of conductive stator magnetic poles arranged radially about the axis. The motor also includes a rotor spaced axially from one side from the stator and rotatably mounted coaxially with the rotational axis and defined by inside and outside diameters. The rotor has a first exterior surface facing the stator and a second exterior surface arranged opposite the first exterior surface. A ferromagnetic rotor core defines the rotor second exterior surface. The rotor also includes alternating south and north pole permanent magnets (PMs) arranged on the rotor core symmetrically around the axis and facing the stator. The rotor additionally includes channels extending radially outwardly across the rotor and configured to direct a coolant, via centrifugal force, from the inside diameter toward the outside diameter as the rotor rotates about the axis.

公开(公告)号：US20250088046A1

公开(公告)日：2025-03-13

申请号：US18490327

申请日：2023-10-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Vincent Fedida ,  Jian Yao ,  Chengwu Duan

IPC: H02K1/14 ,  B60L50/60 ,  H02K21/24

Abstract: An electrical machine includes a rotationally-fixed stator defining a rotational axis of the electrical machine and having a plurality of stator magnetic poles, the stator magnetic poles disposed about the rotational axis. The electrical machine also has a rotor rotatably mounted coaxially with the rotational axis and axially spaced from the stator, the rotor having a plurality of permanent magnets facing the stator magnetic poles. Each stator magnetic pole includes a plurality of ferromagnetic laminations in a lamination stack that extends from a radially-inward extent to a radially-outward extent relative to the rotational axis, and a ferromagnetic composite pole portion affixed to the radially-outward extent or the radially-inward extent of the lamination stack of the stator magnetic pole.

公开(公告)号：US20240178732A1

公开(公告)日：2024-05-30

申请号：US18159793

申请日：2023-01-26

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Alan G. Holmes ,  Chengwu Duan ,  Vincent Fedida ,  Denghao Fan

IPC: H02K21/02 ,  H02K1/27

CPC classification number: H02K21/026 ,  H02K1/27 ,  H02K2201/03 ,  H02K2213/09

Abstract: An axial flux motor may include a stator, a rotor including a rotor frame and having a rotational axis, an axial air gap separating the stator and the rotor, the axial air gap corresponding to an axial position of the rotor frame, and at least one hydraulic actuator including a variable volume hydraulic fluid chamber defined within the rotor frame, wherein a change in the volume of the variable volume hydraulic fluid chamber causes a change in the axial position of the rotor frame and a corresponding change in the axial air gap separating the stator and the rotor.