公开(公告)号：US20240291332A1

公开(公告)日：2024-08-29

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

CPC classification number: H02K1/26 ,  H02K15/024

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：US11545880B2

公开(公告)日：2023-01-03

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.

公开(公告)号：US09973067B2

公开(公告)日：2018-05-15

申请号：US14677466

申请日：2015-04-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael D. Hanna ,  John S. Agapiou

IPC: H02K17/16 ,  B22D19/00 ,  H02K15/00 ,  B22D17/00

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：US20180062486A1

公开(公告)日：2018-03-01

申请号：US15254834

申请日：2016-09-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  Blair E. Carlson

IPC: H02K15/00 ,  H02K1/26 ,  H02K3/12

CPC classification number: H02K15/0012 ,  H02K1/26 ,  H02K3/12 ,  H02K17/205

Abstract: A rotor for an electromagnetic machine and a method of assembling the rotor are provided. In one embodiment, the rotor includes a lamination stack disposed about a rotational axis a plurality of conductor bars disposed within corresponding slots formed in the lamination stack and extending beyond the longitudinal ends of the lamination stack. End rings are positioned at either end of the lamination stack and define a plurality of openings configured to receive the ends of the conductor bars. Each end ring includes separate inner and outer concentric rings. The inner and outer rings define radially outer and inner surfaces configured to abut one another and each of the concentric rings defines a portion of each conductor bar opening in the end ring.

公开(公告)号：US20160327931A1

公开(公告)日：2016-11-10

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

CPC classification number: G05B19/402 ,  G05B19/4083 ,  G05B2219/36054

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.

Abstract translation: 用于抵消CNC加工过程的系统包括通过数控机床固定G代码编程中的寄存器传送补偿变量，并抵消CNC机床，而不改变固定的G代码编程。 全局补偿变量适用于CNC加工过程的所有特征程序，局部补偿变量仅适用于单个特征或特征组。 机器响应补偿变量移位位置。

公开(公告)号：US09482710B2

公开(公告)日：2016-11-01

申请号：US14024185

申请日：2013-09-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John S. Agapiou ,  Thomas A. Perry ,  Jon Matthew Radlick

IPC: G01R31/00 ,  G01R31/34 ,  G01R31/12

CPC classification number: G01R31/003 ,  G01R31/1227 ,  G01R31/343

Abstract: An electrical part testing system for evaluating quality of an insulated electrical part, including a computer-controlled switching apparatus for providing an original voltage to the electrical part automatically according to a pre-established testing scheme calling for provision of voltage to each phase of the part, in turn, while grounding the other phases of the part. A high-frequency filter for receiving receive the original voltage, receiving a load voltage emanating from the electrical part in response to the part receiving the original voltage, and filtering the original voltage from the load voltage to isolate any partial-discharge voltage added to the original voltage by the electrical part while the part is being electrified by the original voltage, yielding a filtered signal. A computing device determines, based on a comparison of a peak amplitude of the partial-discharge inception voltage to a voltage threshold, the quality of the electrical part being tested.

Abstract translation: 一种用于评估绝缘电气部件的质量的电气部件测试系统，包括用于根据预先建立的测试方案自动向电气部件提供原始电压的计算机控制的开关装置，其要求向部件的每个相位提供电压 反过来，同时接地零件的其他阶段。 用于接收的高频滤波器接收原始电压，响应于接收原始电压的部分接收从电气部分发出的负载电压，并且从负载电压对原来的电压进行滤波，以将添加到 原始电压通过电气部分，同时部分由原始电压通电，产生滤波信号。 计算装置基于部分放电起始电压的峰值振幅与电压阈值的比较来确定正在测试的电气部件的质量。

公开(公告)号：US20160218603A1

公开(公告)日：2016-07-28

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: H02K15/00 ,  B23K35/22 ,  B23K9/23 ,  B23K1/19 ,  B23K1/00 ,  B23K9/00

CPC classification number: B23K35/222 ,  B23K1/0016 ,  B23K1/19 ,  B23K9/0008 ,  B23K9/167 ,  B23K9/23 ,  B23K2101/32 ,  B23K2101/36 ,  B23K2103/12 ,  H02K3/50 ,  H02K15/0081

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.

Abstract translation: 公开了一种电弧焊接/钎焊方法，其可用于将第一铜片和第二铜片接合在一起而不损害可能位于附近的更多热敏材料。 电弧焊接/钎焊工艺包括使用与直线极性取向的焊接控制电连通的非消耗性电极线，以跨越在电极线的前端和第一铜片之间建立的间隙 。 当电弧建立时流过电弧的电流加热第一铜片，使得第一铜片接合到第二铜片。 第一铜片和第二铜片之间的接合部可以是自身焊接接头或钎焊接头。

公开(公告)号：US20250158498A1

公开(公告)日：2025-05-15

申请号：US18505598

申请日：2023-11-09

Applicant: GM Global Technology Operations LLC

Inventor： John S. Agapiou ,  Qigui Wang

IPC: H02K17/16 ,  H02K15/00

Abstract: An induction rotor assembly includes a laminated stack, conductor bars, a first end ring, and a second end ring. The laminated stack includes a body with a first end, an opposing second end, and an outer circumferential surface extending from the first end to the second end along a longitudinal axis. The conductor bars are disposed within grooves in the outer circumferential surface. Each conductor bar includes a first conductor end and a second conductor end extending beyond the ends of the laminated stack. The first conductor end and the second conductor end of each of the conductor bars includes a serrated surface having serrations. The first end ring and second end ring interlock with the serrated surface of the conductor ends. The conductor bars extend between the first end ring and the second end ring.

公开(公告)号：US20230115294A1

公开(公告)日：2023-04-13

申请号：US17448990

申请日：2021-09-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ronald M. Lesperance ,  John S. Agapiou

IPC: G01R31/34 ,  G01R31/12

Abstract: Methods and systems for detecting partial discharge in a stator for an electric motor are provided. An exemplary method includes applying a high voltage AC sinewave input signal to the stator and energizing at least one winding therein. The method includes sensing a first resulting load signal occurring in the stator with a first device and filtering the first resulting load signal to form a first high frequency signal indicating any partial discharge (PD) voltage occurring in the stator. The method also includes sensing a second resulting load signal occurring in the stator with a second device and filtering the second resulting load signal to form a second high frequency signal indicating any partial discharge voltage occurring in the stator. Further, the method includes processing the first and second high frequency signals to form a processed signal indicating whether partial discharge occurred.

公开(公告)号：US20220231587A1

公开(公告)日：2022-07-21

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 ,  H02K1/27 ,  H02K9/22 ,  H02K5/15

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.