公开(公告)号：US12244178B2

公开(公告)日：2025-03-04

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 ,  H02K1/2798 ,  H02K3/24 ,  H02K5/20 ,  H02K7/00 ,  H02K16/02 ,  H02K21/24 ,  H02K9/22

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：US12206285B2

公开(公告)日：2025-01-21

申请号：US18174879

申请日：2023-02-27

Applicant: GM Global Technology Operations LLC

Inventor： Qigui Wang ,  John S. Agapiou ,  Liang Wang ,  Lei Hao ,  Daniel J. Wilson ,  Steven L Burkholder

IPC: H02K1/26 ,  H02K15/02

Abstract: An induction rotor assembly having conductive bars is provided. The assembly comprises a lamination stack comprising a body having a first end and second ends to define a longitudinal axis. The body has an outer circumferential portion extending from the first end to the second end. The outer portion has a plurality of walls defining open slots formed from the first end through the second end. The assembly further comprises a first ring disposed on the first end and a second ring disposed on the second end. The assembly further comprises a plurality of conductive bars extending between the first and second rings. Each conductive bar is disposed in one of the slots such that the respective conductive bar is in contact with the lamination stack and connects the first and second rings. Each bar comprises an inner portion and a conductive outer skin disposed about the inner portion.

公开(公告)号：US12126225B2

公开(公告)日：2024-10-22

申请号：US17690926

申请日：2022-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  Sean Robert Wagner

IPC: H02K11/20 ,  G01N21/88 ,  G06T7/00

CPC classification number: H02K11/20 ,  G01N21/8851 ,  G06T7/001 ,  G06T2207/30164

Abstract: A method of inspecting a stator stack includes disposing the stator stack on a support surface of an inspection system, and performing a depth measurement of a stator slot. The depth measurement includes rotating the stator slot along a first direction to a plurality of first orientations, taking a first image at each of the first orientations, and measuring a depth based on at least one of the first images. The method includes performing a width measurement of the stator slot, which includes rotating the stator slot along a second direction to a plurality of second orientations, taking a second image at each of the second orientations, and measuring a width based on at least one of the second images. The method further includes inspecting edges of the stator slot in the at least one of the first images to detect a potential deviation.

公开(公告)号：US12121960B1

公开(公告)日：2024-10-22

申请号：US18640032

申请日：2024-04-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qigui Wang ,  John S. Agapiou ,  Liang Wang ,  Paul J. Boone

IPC: B22D17/22

CPC classification number: B22D17/2272

Abstract: A casting die includes a first ingate defining a first annular chamber and a second ingate defining a second annular chamber and spaced from the first ingate. The die includes a first end ring gate concentric with the first ingate and defining a first end ring chamber in fluid communication with the first annular chamber, and a second end ring gate concentric with the second ingate and defining a second end ring chamber in fluid communication with the second annular chamber. The die includes runners interconnecting the first and second end ring gates. Each of the runners defines a conductor bar channel in fluid communication with the first and second end ring chambers. The die includes an overflow gate disposed between the first and second ingates, wherein the overflow gate defines an annular overflow chamber in fluid communication with the conductor.

公开(公告)号：US20240257996A1

公开(公告)日：2024-08-01

申请号：US18161496

申请日：2023-01-30

Applicant: GM Global Technology Operations LLC

Inventor： Qigui Wang ,  John S. Agapiou ,  Liang Wang ,  Lei Hao

IPC: H01B13/00 ,  B23K20/02 ,  H01B5/02

CPC classification number: H01B13/0036 ,  B23K20/023 ,  H01B5/02 ,  H01B13/0016 ,  B23K2101/38 ,  B23K2103/10

Abstract: A method of making an electric conductor having a conductive skin layer. The method comprises providing a conductive member having a first width and a conductive layer disposed thereon for conductivity. The conductive layer has a second width to define a width ratio of the first width to the second width of 4:1 to 200:1. The conductive layer has greater conductivity than the conductive member. The method comprises disposing the conductive layer about the conductive member to define a conductive layered member and pressing the conductive layered member for mechanical contact to define a pressed layered member. The method comprises thermally treating the pressed layered member for diffusion between the conductive layer and the conductive member defining a diffused layered member. The method further comprises cooling the diffused layered member for diffusion bonding free of an intermetallic phase between the conductive layer and the conductive member.

公开(公告)号：US20240217027A1

公开(公告)日：2024-07-04

申请号：US18090102

申请日：2022-12-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chen ZHOU ,  Wuhua Yang ,  John S. Agapiou ,  Terebara Hughes ,  Thiagarajan Chidambareswaran

IPC: B23K26/03 ,  B23K26/046 ,  B23K26/08 ,  B23K26/21 ,  B23K37/02

CPC classification number: B23K26/032 ,  B23K26/046 ,  B23K26/0884 ,  B23K26/21 ,  B23K37/0258 ,  B23K2101/36

Abstract: A system for welding together tips of different wires arranged about a motor stator. A scanner control module is configured to operate a three-dimensional scanner to scan the tips of the different wires and measure alignment of the tips in X, Y, and Z directions of a coordinate plane. A system control module is configured to compare the measured alignment of the tips to a predetermined alignment range, and configured to identify a weld schedule for each of the tips that fall within the predetermined alignment range. A laser welder control module is configured to operate a laser welder to weld together only the tips aligned within the predetermined alignment range in accordance with the weld schedule identified by the system control module.

公开(公告)号：US20230291284A1

公开(公告)日：2023-09-14

申请号：US17690926

申请日：2022-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  Sean Robert Wagner

IPC: H02K11/20 ,  G06T7/00 ,  G01N21/88

CPC classification number: H02K11/20 ,  G06T7/001 ,  G01N21/8851 ,  G06T2207/30164

Abstract: A method of inspecting a stator stack includes disposing the stator stack on a support surface of an inspection system, and performing a depth measurement of a stator slot. The depth measurement includes rotating the stator slot along a first direction to a plurality of first orientations, taking a first image at each of the first orientations, and measuring a depth based on at least one of the first images. The method includes performing a width measurement of the stator slot, which includes rotating the stator slot along a second direction to a plurality of second orientations, taking a second image at each of the second orientations, and measuring a width based on at least one of the second images. The method further includes inspecting edges of the stator slot in the at least one of the first images to detect a potential deviation.

公开(公告)号：US20230275494A1

公开(公告)日：2023-08-31

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

CPC classification number: H02K15/0037 ,  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：US11552541B2

公开(公告)日：2023-01-10

申请号：US17151256

申请日：2021-01-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  Edwin H. Chang ,  Yew Sum Leong

IPC: H02K17/16 ,  H02K5/15 ,  H02K9/22 ,  H02K1/2706

Abstract: An induction motor includes a stator and a rotor. The stator is configured to generate a rotating magnetic field. The rotor is disposed inside the stator, separated from the stator by an air gap, and is configured to rotate around an axis in response to the rotating magnetic field. The rotor includes a rotor core, multiple end rings, and multiple collars. The end rings are attached at opposite ends of the rotor core. Each end ring has one of multiple regions disposed outside the air gap. Each region has an outer surface. The collars are attached in a prestressed condition around the outer surface of each region. The prestressed condition is configured to maintain a compressive stress in the end rings at a maximum-designed rotational speed of the rotor.

公开(公告)号：US20210031297A1

公开(公告)日：2021-02-04

申请号：US16529313

申请日：2019-08-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Hongliang Wang ,  John S. Agapiou ,  John D. Campbell ,  Hui-Ping Wang

IPC: B23K26/03 ,  B23K26/21 ,  B23K26/70 ,  B23K31/02 ,  B29C65/16 ,  B23K31/12

Abstract: A system and method for inspecting and laser welding a workpiece at an area of interest on the workpiece includes a first camera configured to view the area of interest along a first line of sight, a second camera configured to view the area of interest along a second line of sight different from the first line of sight, a laser welding scan head configured to laser weld the workpiece at the area of interest, and a control system configured to receive input from each of the first and second cameras, determine one or more alignment measurements based on the received input, and select a weld schedule from a plurality of weld schedules based on the one or more alignment measurements.