公开(公告)号：US20230080123A1

公开(公告)日：2023-03-16

申请号：US17549324

申请日：2021-12-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yusheng ZOU ,  Lei HAO ,  Chengwu DUAN ,  Jian YAO ,  Chandra S. NAMUDURI

IPC: H02M3/158 ,  H02J7/00 ,  B60L58/18

Abstract: A power control system includes a battery system and a DC-DC converter with first, second, third, and fourth power switches. A second terminal of the first power switch is connected to a first terminal of the second power switch. A second terminal of the third power switch is connected to a first terminal of the fourth power switch. A first inductor includes a first terminal connected to the second terminal of the first power switch and the first terminal of the second power switch and a second terminal connected to the second terminal of the third power switch and the first terminal of the fourth power switch. A first bypass switch is connected in parallel to the first power switch. A second bypass switch is connected in parallel to the third power switch.

公开(公告)号：US20220166268A1

公开(公告)日：2022-05-26

申请号：US17489552

申请日：2021-09-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chengwu DUAN ,  Jian YAO ,  Alireza FATEMI

IPC: H02K1/20 ,  H02K1/14 ,  H02K9/19 ,  H02K21/24 ,  H02K15/02

Abstract: A stator assembly for an axial flux motor includes a heat exchanger jacket configured to circulate a heat transfer liquid. A stator also includes a plurality of stator cores each having a conductive winding, an electrically insulating material disposed over at least a portion of the conductive wire winding, and a molded soft magnetic composite (SMC) material. The heat exchanger jacket is disposed circumferentially around at least a portion of a perimeter of the stator. Each stator core defines a peripheral surface configured to contact the heat exchanger jacket and at least a portion of the peripheral surface is defined by the molded soft magnetic composite (SMC) material. Methods of making a molded soft magnetic composite (SMC) material stator core are also provided.

公开(公告)号：US20230150378A1

公开(公告)日：2023-05-18

申请号：US17550004

申请日：2021-12-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lei HAO ,  Chandra S. NAMUDURI ,  Chengwu DUAN ,  Suresh GOPALAKRISHNAN ,  Neeraj S. SHIDORE ,  Venkata Prasad ATLURI

IPC: B60L53/20 ,  H02M3/158 ,  H02J7/00 ,  B60L53/16

CPC classification number: B60L53/20 ,  H02M3/158 ,  H02J7/0042 ,  H02J7/0013 ,  B60L53/16 ,  H02J2207/20 ,  B60L2210/10 ,  H02J2207/40

Abstract: A power control system for a vehicle includes a charge port and a contactor connected to the charge port and including a first plurality of switches. An energy storage system includes a second plurality of switches and one or more battery packs. A bi-directional DC-DC converter is connected between the energy storage system and a plurality of vehicle loads. A controller is configured to control states of the first and second plurality of switches to configure in a plurality of modes including a range improvement mode, a first charging mode to perform charging at a first voltage level, a second charging mode to perform charging at a second voltage level, a battery preconditioning mode; and an accessory load support mode.

公开(公告)号：US20210288569A1

公开(公告)日：2021-09-16

申请号：US17081390

申请日：2020-10-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian YAO ,  Chengwu DUAN ,  Yusheng ZOU ,  Alireza FATEMI

IPC: H02K21/24 ,  H02K1/14 ,  H02K1/27

Abstract: An axial flux motor includes: a stator having a first side and a second side opposite the first side, the stator including: N stator core components on the first side, where N is an integer greater than two; and pole shoes attached to radial sides of the N stator core components, N slot openings between adjacent ones of the pole shoes, where each of the N slot openings extends in at least one direction non-radially on the first side; and a rotor including a third side and M permanent magnets on the third side, where the first side is parallel to the third side, and where M is an integer greater than two.

公开(公告)号：US20230283145A1

公开(公告)日：2023-09-07

申请号：US17728260

申请日：2022-04-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chengwu DUAN ,  Zhen GAO ,  Jian YAO

IPC: H02K7/116 ,  H02K1/276 ,  H02K1/2793 ,  H02K5/173

CPC classification number: H02K7/116 ,  H02K1/276 ,  H02K1/2793 ,  H02K5/1735

Abstract: An axial flux motor includes: a ring-shaped stator, a ring-shaped rotor and a planetary gear set. The ring-shaped stator includes a stator core and segments arranged on the stator core, where each of the segments includes a laminated stack and windings wrapped around the laminated stack. The ring-shaped rotor defines an inner open area and including a body and permanent magnets arranged on the body adjacent to and spaced from the segments. The planetary gear set is disposed within the inner open area and configured to receive an input torque from the rotor and provide an output torque, which is greater than the input torque.

公开(公告)号：US20230275476A1

公开(公告)日：2023-08-31

申请号：US17724588

申请日：2022-04-20

Applicant: GM Global Technology Operations LLC

Inventor： Jian YAO ,  Chengwu DUAN

IPC: H02K1/18 ,  H02K1/2713

CPC classification number: H02K1/182 ,  H02K1/2713 ,  H02K7/003

Abstract: A hybrid stator core for an axial flux electric machine is described herein. The hybrid stator core includes a laminated component and at least one soft magnetic composite (SMC) component. The laminated component includes a first block section, a first tab, and a second tab, the first block section having a first end, a second end opposite the first end, a first side surface extending between the first and second ends, and a second side surface opposite the first side surface. The first tab projects from the first side surface adjacent to the first end of the first block section. The second tab projects from the first side surface adjacent to the second end of the first block section. The at least SMC component is configured to abut the first side surface of the first block section. The first and second tabs are configured to hold the at least one SMC component therebetween.

公开(公告)号：US20230264602A1

公开(公告)日：2023-08-24

申请号：US17848433

申请日：2022-06-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian YAO ,  Chengwu DUAN ,  Ming LIU ,  Chih-hung YEN ,  Anil K. SACHDEV

IPC: B60L58/26 ,  B60L50/64 ,  B60L50/60

CPC classification number: B60L58/26 ,  B60L50/64 ,  B60L50/66 ,  B60L2240/425 ,  B60L2240/525 ,  B60L2240/545

Abstract: A cooling system includes a housing configured to enclose an electric vehicle component immersed in cooling fluid and to define a first volume. A variable volume member defines a second volume that varies in response to a first signal. A combined volume is defined by the first volume and the second volume. Heat causes the cooling fluid to transition between a liquid state and a vapor state in the combined volume. A pressure sensor is configured to sense a pressure in the combined volume. A condenser is configured to cause the cooling fluid to transition from the vapor state back to the liquid state. A controller includes a volume adjustment module configured to generate the first signal to vary the second volume of the variable volume member to adjust the combined volume in response to the pressure and a first temperature of the electric vehicle component.

公开(公告)号：US20210288554A1

公开(公告)日：2021-09-16

申请号：US17081443

申请日：2020-10-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian YAO ,  Chengwu DUAN

IPC: H02K9/193 ,  H02K5/20

Abstract: An electric motor includes a housing, a shaft, a rotor, a stator, and at least one coolant supply channel. The shaft is rotatably mounted within the housing and has a longitudinal axis. The rotor is fixed to the shaft for rotation therewith. The stator is spaced apart from the rotor along the longitudinal axis of the shaft to yield at least one air gap between the stator and the rotor. The at least one coolant supply channel extends through at least one of the shaft and the stator and is configured to supply coolant flow to the at least one air gap.

公开(公告)号：US20230291258A1

公开(公告)日：2023-09-14

申请号：US17714252

申请日：2022-04-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chengwu DUAN ,  Zhen GAO ,  Jian YAO

IPC: H02K1/2798 ,  H02K1/16 ,  H02K1/18 ,  H02K3/30 ,  H02K16/02 ,  H02K21/24

CPC classification number: H02K1/2798 ,  H02K1/165 ,  H02K1/182 ,  H02K3/30 ,  H02K16/02 ,  H02K21/24

Abstract: An axial flux electric machine comprises a stator including a plurality of stator core segments each comprising a lamination comprising a plurality of layers. A first soft magnetic composite (SMC) portion is arranged adjacent to the plurality of layers of the lamination. An insulating layer arranged between circumferential side surfaces of the plurality of layers of the lamination and the first SMC portion. A rotor is arranged axially adjacent to the stator and including a plurality of permanent magnets. The rotor and stator are configured to generate magnetic flux that is aligned parallel to an axis of rotation of the rotor.

公开(公告)号：US20220166264A1

公开(公告)日：2022-05-26

申请号：US17116661

申请日：2020-12-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza FATEMI ,  Anil K. SACHDEV ,  Jian YAO ,  Anthony M. COPPOLA ,  Thomas W. NEHL ,  Chengwu DUAN

IPC: H02K1/02 ,  H02K1/27 ,  H02K1/32 ,  H02K15/03 ,  H02K21/24 ,  H01F41/02

Abstract: A bi-material permanent magnet for an electric machine includes a core including a first magnetic material and a shell portion located on the core and made of a second magnetic material. The first magnetic material comprises a magnet material with an energy less than 20 Mega Gauss Oersteds (MGOe). The second magnetic material comprises a magnet material with an energy greater than 30 MGOe.