公开(公告)号：US10707718B2

公开(公告)日：2020-07-07

申请号：US15442745

申请日：2017-02-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Arthur L. McGrew, Jr. ,  Huaxin Li ,  John S. Agapiou

IPC: H02K5/04 ,  H02K1/18 ,  H02K7/116 ,  B60L50/50 ,  B60K6/445 ,  B60K6/26 ,  B60K6/36

Abstract: An electric motor includes a stator assembly and a rotor configured to rotate within the stator assembly about an axis. The stator assembly includes a stator case having a channel and a laminate steel core having a retention feature aligned with the channel of the stator case. The stator case is fixed to the laminate steel core via displacement of material of the stator case at the channel toward the laminate steel core to capture the retention feature. An electro-mechanical drive-unit employing the above-described electric motor and a method of generating a stator assembly for such an electric motor are also contemplated.

公开(公告)号：US10213878B2

公开(公告)日：2019-02-26

申请号：US14996549

申请日：2016-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James G. Schroth ,  Thomas A. Perry ,  John S. Agapiou ,  Ronald M. Lesperance

IPC: B23K35/22 ,  B23K9/00 ,  B23K9/23 ,  B23K1/19 ,  B23K1/00 ,  B23K9/167 ,  H02K3/50 ,  H02K15/00 ,  B23K103/12 ,  B23K101/32 ,  B23K101/36

Abstract: An arc welding/brazing process is disclosed that is useful to join together a first copper piece and a second copper piece without damaging more heat-sensitive materials that may be located nearby is disclosed. The arc welding/brazing process includes using a non-consumable electrode wire, which electrically communicates with a weld control in a straight polarity orientation, to strike an arc across a gap established between a leading tip end of the electrode wire and the first copper piece. The current that flows through the arc when the arc is established heats the first copper piece such that the first copper piece becomes joined to a second copper piece. The joint between the first copper piece and the second copper piece may be an autogenous weld joint or a braze joint.

公开(公告)号：US10067497B2

公开(公告)日：2018-09-04

申请号：US15093032

申请日：2016-04-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jie Gu ,  John S. Agapiou

IPC: G05B19/402 ,  G05B19/408

Abstract: A system for offsetting a CNC machining process includes transferring compensation variables through registers in fixed G-code programming of the CNC machine and offsetting the CNC machine without altering fixed G-code programming. Global compensation variables are applied to all feature programs of the CNC machining process, and local compensation variables are applied to only individual features or groups of features. The machine shifts position in response to the compensation variables.

公开(公告)号：US20180183308A1

公开(公告)日：2018-06-28

申请号：US15902618

申请日：2018-02-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael D. Hanna ,  John S. Agapiou

IPC: H02K17/16 ,  H02K15/00 ,  B22D19/00

CPC classification number: H02K17/165 ,  B22D17/00 ,  B22D19/0054 ,  H02K15/0012

Abstract: A rotor casting includes a lamination stack and a cast structure including proximal and distal cast end rings respectively adjacent proximal and distal end faces of the lamination stack. Cast axial ribs are distributed radially on a peripheral surface of the lamination stack and extend between the proximal and distal cast end rings. Cast feed members extend axially from the proximal cast end ring and are respectively positioned radially between an adjacent pair of axial ribs. In one example, cast bar segments integral to the proximal and distal cast end rings are formed in axial slots of the lamination stack. In one example, a bar insert in each axial slot has insert ends that extend respectively from the proximal and distal end faces of the lamination stack and are fully encapsulated respectively in the proximal and distal cast end rings. A method of forming the rotor casting is provided.

公开(公告)号：US09866092B2

公开(公告)日：2018-01-09

申请号：US14281187

申请日：2014-05-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael D. Hanna ,  James G. Schroth ,  John S. Agapiou ,  John C. Morgante

IPC: H02K15/02 ,  H02K15/00 ,  H02K17/16

CPC classification number: H02K15/0031 ,  H02K15/0012 ,  H02K15/024 ,  H02K17/165 ,  Y10T29/49014

Abstract: A method of forming a rotor includes inserting a conductor bar into a slot defined by a lamination stack to define a gap between the conductor bar and the lamination stack. The method further includes, after inserting, swelling the conductor bar within the slot to fill the gap and form the rotor. A rotor is also disclosed.

公开(公告)号：US12184131B2

公开(公告)日：2024-12-31

申请号：US17680578

申请日：2022-02-25

Applicant: GM Global Technology Operations LLC

Inventor： Mark A. Smith ,  Ante Tony Lausic ,  John S. Agapiou

IPC: H02K15/00 ,  B21D37/10

Abstract: An interlocking tool for a for forming stator end turns includes a first member including a first base having a first surface. A first ring extends from the first surface and a second ring extends from the first surface radially outwardly of the first ring. The second ring is spaced from the first ring by a first gap. A second member includes a second base having a first surface portion. A first ring element extends from the first surface portion and a second ring element extends from the first surface portion radially inwardly of the first ring element. The second ring element is spaced from the first ring element by a second gap. The second ring is positioned in the second gap, and the second ring element is positioned in the first gap. The first member is rotatable relative to the second member.

公开(公告)号：US12136207B2

公开(公告)日：2024-11-05

申请号：US17690919

申请日：2022-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  Sean Robert Wagner

IPC: G06T7/00 ,  H02K1/14 ,  H02K1/16 ,  H02K15/02

Abstract: A system for inspecting a stator stack includes a rotary table, an imaging device configured to take a plurality of images of a portion of the stator stack including a stator slot, an illuminator configured to apply illumination through the stator slot, and an alignment and monitoring system configured to monitor and orient the stator slot relative to the imaging axis. The alignment and monitoring system includes a tilting system configured to move the stator slot between a plurality of orientations relative to an imaging axis, the imaging device configured to take a respective image at each of the plurality of orientations, a controller configured to control the tilting system based on one or more measurements of each image, and a processor configured to analyze each image and select an orientation of the stator slot as an optimal orientation for inspection of the stator slot.

公开(公告)号：US20240014699A1

公开(公告)日：2024-01-11

申请号：US17873470

申请日：2022-07-26

Applicant: GM Global Technology Operations LLC

Inventor： John S. Agapiou ,  Jian Yao ,  Zhen Gao ,  SeungHwan Keum

IPC: H02K1/20 ,  H02K1/14 ,  H02K1/16

CPC classification number: H02K1/20 ,  H02K1/145 ,  H02K1/16

Abstract: An axial flux electric motor includes a housing including an inner surface and a stator fixedly mounted in the housing. The stator includes a plurality of stator segments each supporting a winding, an inner support member defining a central passage, and an outer annular member constraining the plurality of stator segments. The outer annular member includes an outer surface portion abutting the inner surface of the housing. A thermal connection system is disposed between the outer surface portion of the outer annular member and the inner surface. The thermal connection system transfers heat from the stator into the housing.

公开(公告)号：US11482895B2

公开(公告)日：2022-10-25

申请号：US16990475

申请日：2020-08-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Hongliang Wang ,  Yew Sum Leong ,  Song He ,  Edward L. Kaiser ,  John S. Agapiou

IPC: H02K1/18 ,  H02K15/02 ,  H02K15/14 ,  H02K5/24

Abstract: An electric machine may include a substantially annular stator stack having a plurality of laminations which include mounting ears. A fraction of the laminations may be oriented such that the mounting ears are angularly offset from the others. The stator may be secured to a housing at both mounting ear locations thus improving structural rigidity and enhancing performance.

公开(公告)号：US20220131450A1

公开(公告)日：2022-04-28

申请号：US17077318

申请日：2020-10-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  James G. Schroth

IPC: H02K15/02 ,  H02K1/14

Abstract: Stator cores and methods for fabricating stator cores are provided. An exemplary stator core includes a stack of laminations. Each lamination in the stack of laminations comprises a yoke and a plurality of tooth segments fixed to the yoke.