公开(公告)号：US20250158553A1

公开(公告)日：2025-05-15

申请号：US18506454

申请日：2023-11-10

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri ,  Junghoon Kim ,  Yilun Luo ,  Khorshed Mohammed Alam

IPC: H02P27/08 ,  B60L15/00 ,  B60L50/40 ,  B60R16/033

Abstract: A vehicle system includes a first battery pack connected to a second battery pack via a flying capacitor multi-level inverter. The fling capacitor inverter has multiple inverter legs, with each inverter leg being arranged in a flying capacitor topology. A three phase motor is connected to the inverter. A controller connected to the motor and the inverter. The controller includes a memory storing instructions configured to cause the controller to control the inverter as a direct current (DC)-DC converter such that a circulating current passes through the motor, the first battery pack and the second battery pack.

公开(公告)号：US20250119021A1

公开(公告)日：2025-04-10

申请号：US18483166

申请日：2023-10-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dumitru Puiu ,  Mazharul Chowdhury ,  Mohammad F. Momen ,  Khorshed Mohammed Alam ,  Muhammad A. Zahid ,  Yilun Luo

IPC: H02K5/14 ,  H01R39/26

Abstract: A rotor assembly includes a rotor shaft and a rotor core supported by the rotor shaft and surrounded by a plurality of windings. The rotor assembly also includes a first brush engaging a first slip ring fixed relative to a first distal end of the rotor shaft. The first brush includes one of a first conical projection or a first convex receptacle and the first slip ring includes the other of the first conical projection or the first convex receptacle. A first electrical connection extends between the first slip ring and the plurality of windings. A second brush is configured to engage a second slip ring with the second slip ring fixed relative to the rotor shaft. A second electrical connection extending between the second slip ring and the plurality of windings.

公开(公告)号：US20250107051A1

公开(公告)日：2025-03-27

申请号：US18474637

申请日：2023-09-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yilun Luo ,  Ronald O. Grover, JR. ,  Sanjeev M. Naik ,  Chandra S. Namuduri ,  Rashmi Prasad ,  Junghoon Kim ,  Peng Peng

IPC: H05K7/20

Abstract: Embodiments of the present disclosure are directed to power module cooling systems. In particular, some embodiments of the present disclosure relate to power module cooling systems with structures to generate three-dimensional swirling and tumbling in liquid coolant flowing within a chamber of the cooling system. Other embodiments may be disclosed or claimed.

公开(公告)号：US20240429773A1

公开(公告)日：2024-12-26

申请号：US18339822

申请日：2023-06-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yilun Luo ,  John Diemer ,  Jack M. Gayney ,  Patrick S. Portell ,  Sanjeev M. Naik ,  Azadeh Narimissa ,  Mohammad F. Momen

IPC: H02K5/173 ,  H02K7/00 ,  H02K11/40

Abstract: An electric motor including a motor casing, a shaft having an axis of rotation, a first end and a second end, a first main bearing for rotatably supporting the shaft at the first end within the motor casing, a second main bearing for rotatably supporting the shaft at the second end within the motor casing, and a grounding bearing for conducting a bearing current between the shaft and the motor casing.

公开(公告)号：US20240429713A1

公开(公告)日：2024-12-26

申请号：US18339606

申请日：2023-06-22

Applicant: GM Global Technology Operations LLC

Inventor： Chandra S. Namuduri ,  Rashmi Prasad ,  Suresh Gopalakrishnan ,  Yilun Luo ,  Khorshed Mohammed Alam ,  Minh-Khai Nguyen

IPC: H02J3/32 ,  B60L50/60 ,  B60L53/24 ,  B60L55/00 ,  H02J7/02 ,  H02M7/797

Abstract: An electric vehicle includes a drive system that performs a method of transferring power between a vehicle and an external location. The drive system includes a battery, a rectifier, and a processor. The rectifier is one of a two-level rectifier and a multi-level rectifier. The processor is configured to connect the rectifier between an alternating current (AC) port of an outlet of an external location and the battery. The rectifier is configured to convert between an AC power at the AC port on an external side of the rectifier and a direct current (DC) power at a vehicle side of the rectifier in order to transfer power bi-directionally between the external location and the battery.

公开(公告)号：US20240413777A1

公开(公告)日：2024-12-12

申请号：US18330444

申请日：2023-06-07

Applicant: GM Global Technology Operations LLC

Inventor： Junghoon Kim ,  Muhammad Hussain Alvi ,  Mohammad F. Momen ,  Yilun Luo

IPC: H02P27/06 ,  H02M1/00 ,  H02M7/48

Abstract: An electric motor configuration includes a dual output multilevel inverter. The inverter includes a first and second set of alternating current (AC) phase outputs. The first set of AC phase outputs provide a current, each phase output of the first set of AC phase outputs corresponds to a phase output of the second set of AC phase outputs, and each phase output of the first set of AC phase outputs is offset from the corresponding phase output of the second set of phase outputs by 180 degrees. An electric motor includes a first and second set of antiparallel motor windings. The first set of motor windings is connected to the first set of AC phase outputs and the second set of motor windings are connected to the second set of AC phase outputs. The electric motor includes a mechanical rotation output.

公开(公告)号：US20240234239A1

公开(公告)日：2024-07-11

申请号：US18150406

申请日：2023-01-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad Hussain Alvi ,  Junghoon Kim ,  Yilun Luo ,  Kevin David Corpetti-Vazquez

IPC: H01L23/373 ,  H01L21/48 ,  H01L23/00 ,  H01L23/473 ,  H01L23/498 ,  H01L25/065 ,  H01L25/07

CPC classification number: H01L23/3735 ,  H01L21/4882 ,  H01L23/473 ,  H01L23/49833 ,  H01L23/49844 ,  H01L24/32 ,  H01L24/48 ,  H01L25/0655 ,  H01L25/072 ,  H01L2224/32225 ,  H01L2224/48225 ,  H01L2924/10161 ,  H01L2924/1203 ,  H01L2924/13055 ,  H01L2924/13091 ,  H01L2924/1432 ,  H01L2924/1433

Abstract: Aspects of the disclosure include a 1.5 sided cooled power module for enhanced cooling and gate connections. An exemplary cooled power module can include an upside direct bond copper (DBC) having a first top copper layer, a first bottom copper layer, and a first dielectric layer between the first top copper layer and the first bottom copper layer. A downside DBC includes a second top copper layer, a second bottom copper layer, and a second dielectric layer between the second top copper layer and the second bottom copper layer. One or more dies are positioned between the upside DBC and the downside DBC. The upside DBC is sized such that a portion of an uppermost surface of the one or more dies remains exposed. Bond wires are placed on the exposed portion of the one or more dies and terminated on the first top copper layer of the upside DBC.

公开(公告)号：US20250141320A1

公开(公告)日：2025-05-01

申请号：US18494085

申请日：2023-10-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad A. Zahid ,  Alexander Forsyth ,  Khorshed Mohammed Alam ,  Mazharul Chowdhury ,  Yilun Luo

IPC: H02K11/33 ,  H02K1/26 ,  H02K7/00 ,  H02K9/22 ,  H02K9/28

Abstract: Presented are electric machines with rotor shaft-mounted heat pipes/vapor chambers thermally coupled to endcap-integrated heat sinks, methods for making/using such machines, and vehicles equipped with such machines. An electric machine includes an outer housing, a stator assembly mounted to the housing, and a rotor assembly rotatably mounted adjacent the stator assembly. The stator assembly includes one or more stator windings mounted to an annular stator core. The rotor assembly includes one or more electromagnetic rotor windings mounted to a cylindrical rotor core. A rotor power transfer circuit (PTC) is electrically connected to the rotor assembly to electrify the rotor winding(s). A rotor shaft is attached to the rotor core to rotate in unison therewith. One or more heat pipes are mounted on the rotor shaft's outer surface and project axially between the rotor PTC and rotor core. Each heat pipe passively extracts and transfers thermal energy from the rotor PTC.

公开(公告)号：US20250119086A1

公开(公告)日：2025-04-10

申请号：US18481438

申请日：2023-10-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Junghoon Kim ,  Chandra S. Namuduri ,  Yilun Luo

IPC: H02P25/22 ,  H02K3/28 ,  H02P25/18

Abstract: A motor vehicle includes a multiphase AC electric motor having a stator wound with a first stator winding set including three phases and a second stator winding set including three phases, the three phases of the first stator winding set and the three phases of the second stator winding set wound oppositely to one another in the stator. Additionally, the motor vehicle includes a source of stored electrical energy and an inverter coupled to the source of stored electrical energy and to the electric motor to provide switched electrical energy to the first stator winding set and the second stator winding set. In addition, the motor vehicle includes a driver configured to simultaneously switch a relatively high side of the inverter to a first phase of the first stator winding set and a relatively low side of the inverter to a corresponding first phase of the second stator winding set.

公开(公告)号：US20250119034A1

公开(公告)日：2025-04-10

申请号：US18482224

申请日：2023-10-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mazharul Chowdhury ,  Muhammad A. Zahid ,  Alexander Forsyth ,  Khorshed Mohammed Alam ,  Yilun Luo ,  Junghoon Kim

IPC: H02K11/33 ,  H02K3/28

Abstract: A rotor power transfer circuit for an electric machine. The rotor power transfer circuit may include a multiple leaf direct current (DC)-to-DC (DC-DC) converter having a plurality of branches connected in parallel to a source of DC power. The branches may include a plurality of switches operable for selectively controlling DC power transfer therethrough according to a plurality of rotor winding excitations modes. The rotor power transfer circuit may include an electrical interface configured for electrically connecting each branch with one of a one or more rotor windings wrapped around a plurality of circumferentially spaced rotor protrusions of the electric machine.