公开(公告)号：US20240348117A1

公开(公告)日：2024-10-17

申请号：US18299229

申请日：2023-04-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rebecca K. Risko Cattell ,  Edward L. Kaiser ,  Matthew J. Bozich

IPC: H02K1/32 ,  B60K1/00 ,  H02K1/276 ,  H02K9/19 ,  H02K21/14

CPC classification number: H02K1/32 ,  B60K1/00 ,  H02K1/276 ,  H02K9/19 ,  H02K21/14 ,  B60K2001/006 ,  B60K11/02

Abstract: Presented are direct liquid cooling systems for regulating magnet temperature of electric machines, methods for making/using such systems, and motor vehicles equipped with traction motors having magnets cooled by such systems. An electric machine includes a stator assembly that is located inside a protective outer housing. The stator assembly includes one or more electromagnetic windings mounted onto a stator core. A rotor assembly is rotatably attached to the housing, coaxial with and spaced from the stator assembly. The rotor assembly includes one or more permanent magnets mounted to a rotor core. The rotor core includes one or more radially elongated feed grooves that are fluidly connected to one or more axially elongated feed channels. The rotor feed groove(s) fluidly connect to a direct liquid cooling system to receive therefrom a liquid coolant. Each rotor feed channel transports the liquid coolant into direct contact with a target surface of a magnet.

公开(公告)号：US20230231437A1

公开(公告)日：2023-07-20

申请号：US17578722

申请日：2022-01-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Edward L. Kaiser ,  Paul Buchholz ,  Cheongun Han

IPC: H02K5/20 ,  H02K1/20 ,  H02K1/16 ,  H02K9/19 ,  H02K15/02

CPC classification number: H02K5/203 ,  H02K1/20 ,  H02K1/16 ,  H02K9/19 ,  H02K15/02

Abstract: A motor stator includes a plurality of stacked annular stator laminates defining a stator core having an inner circumference, an outer circumference, a plurality of stator teeth on the inner circumference, and a plurality of ears extending outward from the outer circumference with a respective bolt hole defined in each ear. A first set of the stator laminates includes a plurality of coolant openings therethrough, wherein the coolant openings of adjacent stator laminates communicate with one another in order to define cooling channels inside the stator core. A second set of the stator laminates each include one or more generally radially extending first openings therethrough, wherein the first openings of adjacent stator laminates communicate with one another to define one or more first radial channel segments inside the stator core for providing radial coolant flow between one or more bolt holes and one or more cooling channels.

公开(公告)号：US11646620B2

公开(公告)日：2023-05-09

申请号：US17230501

申请日：2021-04-14

Applicant: GM Global Technology Operations LLC

Inventor： Derek F. Lahr ,  Farzad Samie ,  Edward L. Kaiser

IPC: H02K1/28 ,  H02K15/02 ,  H02K15/03 ,  H02K1/276

CPC classification number: H02K1/28 ,  H02K1/276 ,  H02K15/024 ,  H02K15/03 ,  Y10T29/53143

Abstract: A rotor core for an electric machine of an automobile includes a core stack including a plurality of lamination plates, each lamination plate including a plurality of apertures formed therein, the apertures of each of the lamination plates axially aligned to define a plurality of magnet slots extending axially through the core stack, a plurality of magnets stacked axially within each of the plurality of magnet slots along a length of the core stack, at least one of the plurality of magnet slots including a cavity extending axially along the length of the core stack, and a wedge inserted within the cavity adapted to apply a lateral force onto the plurality of magnets within the at least one magnet slot to secure the plurality of magnets within the at least one magnet slot.

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：US20210234447A1

公开(公告)日：2021-07-29

申请号：US16774696

申请日：2020-01-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Alexandru Rajala ,  Thomas W. Nehl ,  Xiaohui Du ,  Edward L. Kaiser

IPC: H02K24/00 ,  H02K7/00 ,  H02K11/225 ,  B60L50/60 ,  B60L53/22

Abstract: An electric machine includes a machine rotor circumscribed by a machine stator, and having a rotor shaft, rotor stack, and end cap which rotate about an axis. The end cap includes lobes equal in number to a number of pole pairs of the machine rotor. A position sensor assembly has a predetermined alignment with the machine rotor and stator. The sensor assembly includes a sensor rotor formed by the lobes and a sensor stator having a printed circuit board with conductive sine and cosine traces. Machine rotor rotation causes the sensor assembly to output an unmodulated sine and cosine signals to a controller, which then calculates a calibrated reference angle. A magnetic axis of an electrical phase of the machine is aligned with and bisects a peak of the sine trace. A direct axis of the machine rotor aligns with an edge of a lobe.

公开(公告)号：US11056943B2

公开(公告)日：2021-07-06

申请号：US16026430

申请日：2018-07-03

Applicant: GM Global Technology Operations LLC

Inventor： Khwaja M. Rahman ,  Xiaohui Du ,  Edward L. Kaiser

IPC: H02K3/28 ,  H02K1/16 ,  H02K7/04 ,  H02K3/14 ,  H02K3/34 ,  H02K1/27

Abstract: A stator assembly includes a plurality of stator slots having multiple respective slot layers and a plurality of hairpins. The plurality of hairpins have a respective first leg positioned in one of the multiple respective slot layers and a respective second leg positioned in another of the multiple respective slot layers. A first set of n adjacent slots of the plurality of stator slots is configured to accommodate the plurality of hairpins carrying a current in a first phase, n being an integer. The plurality of hairpins is configured in respective conductor layers (L1, L2 . . . ) having a plurality of respective turn locations defining n respective turn positions. The plurality of hairpins is configured to occupy the n respective turn positions an equal number of times such that the respective conductor layers (L1, L2 . . . ) are electrically balanced.

公开(公告)号：US20200185982A1

公开(公告)日：2020-06-11

申请号：US16214795

申请日：2018-12-10

Applicant: GM Global Technology Operations LLC

Inventor： Pavan Kumar Patruni ,  Song He ,  Edward L. Kaiser ,  Mithun Sunny

IPC: H02K1/16 ,  H02K1/18

Abstract: A stator for an electromagnetic machine includes a first lamination stack defining a first cavity therein and having a central longitudinal axis. The first lamination stack includes a first plurality of mounting ears disposed opposite the first cavity and each spaced apart from one another about the central longitudinal axis. The stator further includes a second lamination stack abutting the first lamination stack and defining a second cavity therein aligned with the first cavity along the central longitudinal axis. The second lamination stack includes a second plurality of mounting ears disposed opposite the second cavity and each spaced apart from the first plurality of mounting ears and from one another about the central longitudinal axis. An electromagnetic machine including the stator and a device including the electromagnetic machine are also described.

公开(公告)号：US09847704B2

公开(公告)日：2017-12-19

申请号：US14932590

申请日：2015-11-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Edward L. Kaiser ,  Peter J. Savagian ,  Khwaja M. Rahman

IPC: H02K21/12 ,  H02K15/03 ,  H02K1/27 ,  H02K1/24

CPC classification number: H02K15/03 ,  H02K1/246 ,  H02K1/2766

Abstract: An improved rotor assembly configured for magnets with differing lengths, and methods and systems for manufacturing the same. The rotor assembly may be created by selectively creating first and second tabs extending into apertures of lamination sheets. The first and second tabs may be selectively removed, depending on the different magnet lengths and the specific lamination sheet, according to one of a first finishing schedule and a second finishing schedule. The lamination sheets are stacked with any remaining first and second tabs, and other features, aligned.

公开(公告)号：US09712005B2

公开(公告)日：2017-07-18

申请号：US14557510

申请日：2014-12-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Khwaja M. Rahman ,  Sinisa Jurkovic ,  Edward L. Kaiser ,  Peter J. Savagian

IPC: H02K1/27 ,  H02K21/14

CPC classification number: H02K1/2706 ,  H02K1/2766

Abstract: An interior permanent magnet machine includes a rotor having a plurality of slots. First and second slots are disposed in a first pole and the third and fourth slots are disposed in a second pole. A first angle is defined between respective centerlines of the first and second slots. A second angle is defined between respective centerlines of the third and fourth slots. The first angle is configured to be sufficiently different from the second angle so that torque ripple is reduced. Thus the rotor is configured such that the angular configuration of slots in a first pole is different from the angular configuration of slots in a second pole of the rotor.

公开(公告)号：US09444298B2

公开(公告)日：2016-09-13

申请号：US13869299

申请日：2013-04-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Edward L. Kaiser ,  Paul Buchholz ,  Khwaja M. Rahman

IPC: H02K3/48 ,  H02K3/487 ,  H02K3/34 ,  H02K3/04 ,  H02K3/38

CPC classification number: H02K3/345 ,  H02K3/04 ,  H02K3/34 ,  H02K3/38 ,  H02K3/48 ,  H02K3/487

Abstract: A bar wound stator includes a stator core defining a plurality of slots. Bar-type conductors are disposed within each slot. Each slot includes a slot liner and an insulator cap. Each slot liner includes an end portion disposed against an inner wall surface, and side portions disposed against a first wall surface and a second wall surface respectively. Each insulator cap includes a base portion disposed against an outer wall surface, and side portions disposed against the first wall surface and the second wall surface respectively. The side portions of the insulator cap in each slot overlap the side portions of the slot liner in each slot along the first wall surface and the second wall surface respectively. Each slot includes a recessed feature in each of the first wall surface and the second wall surface to accommodate the overlapping side portions of the insulator cap and the slot liner.

Abstract translation: 棒式定子包括限定多个狭槽的定子芯。 条形导体设置在每个槽内。 每个槽包括槽衬套和绝缘体盖。 每个狭槽衬垫包括抵靠内壁表面设置的端部，以及分别抵靠第一壁表面和第二壁表面设置的侧部。 每个绝缘体盖包括抵靠外壁表面设置的基部，以及分别抵靠第一壁表面和第二壁表面设置的侧部。 每个槽中的绝缘体盖的侧部分分别沿着第一壁表面和第二壁表面与每个槽中的槽衬套的侧部重叠。 每个槽在第一壁表面和第二壁表面中的每一个中包括凹入的特征，以容纳绝缘体盖和槽衬套的重叠侧部。