公开(公告)号：US20250023405A1

公开(公告)日：2025-01-16

申请号：US18349254

申请日：2023-07-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Cheng Gong

IPC: H02K1/276 ,  H02K1/04 ,  H02K1/278 ,  H02K7/00

Abstract: A multi-phase, multi-pole surface/interior permanent magnet motor/generator (S/IPM electric machine) is described, and includes a rotor disposed on a rotor shaft within an annular stator, and a plurality of interior and surface-mounted permanent magnets disposed in longitudinally-oriented pockets of the rotor.

公开(公告)号：US20250149939A1

公开(公告)日：2025-05-08

申请号：US18503217

申请日：2023-11-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Cheng Gong ,  Edward L. Kaiser ,  Cheongun Han

IPC: H02K1/276 ,  H02K7/00

Abstract: A rotor assembly for an electric machine includes first laminates, second laminates; and a rotor shaft, wherein the first laminates and the second laminates are arranged in a stack on the rotor shaft. Each of the first laminates includes a first inner portion and a plurality of first outer portions, wherein the first inner portion and the first outer portions define a plurality of first cavities, wherein the plurality of first outer portions are secured to the first inner portions via a plurality of bridges. Each of the second laminates includes a second inner portion and a plurality of second outer portions. The second inner portion and the plurality of second outer portions define a plurality of second cavities, wherein the second outer portions are secured to the second inner portions via a plurality of second webs and are absent a bridge.

公开(公告)号：US20250112582A1

公开(公告)日：2025-04-03

申请号：US18479365

申请日：2023-10-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anno Yoo ,  Cheng Gong

IPC: H02P29/64 ,  B60L15/20 ,  G01R27/16

Abstract: Methods, systems, and vehicles are provided for determining a stator resistance value of an electric motor. The systems may include the electric motor including a stator and a rotor; a sensor system including configured to generate sensor data indicative of sensed operating conditions of the electric motor including a current magnitude, a current angle, a motor speed, a temperature of the stator, and a temperature of the rotor; and a controller operably coupled with the sensor system and the electric motor. The controller is configured to: determine an initial stator resistance value based on a stator reference temperature and either estimated data sensor data received from the sensor system; determine a stator temperature coefficient based on the sensor data and a stator nonlinear resistance ratio curve; and determine the stator resistance value based on the initial stator resistance value and the stator temperature coefficient.

公开(公告)号：US20230231428A1

公开(公告)日：2023-07-20

申请号：US17578534

申请日：2022-01-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Cheng Gong

IPC: H02K1/276 ,  H02K5/16 ,  H02K15/03

CPC classification number: H02K1/276 ,  H02K5/16 ,  H02K15/03

Abstract: An interior permanent magnet (IPM) electric machine has an improved rotor configuration to manage mechanical stresses induced by electro-magnetic force acting upon permanent magnets housed therein. This includes providing magnet cavities in the rotor with sufficient clearances in the corners wherein a portion of a slot corner is formed with certain curvature shapes using a novel geometry. By doing this, more surface area is obtained to evenly distribute stress that is induced by centrifugal force acting upon the rotor during rotation, thus reducing the stress concentration. Furthermore, an expanded space is achieved between the magnet corner and the rotor lamination, thus providing robust packaging and dynamic support of the permanent magnets in the magnet cavities. Furthermore, the expanded space provides improved clearance for ease of manufacturing and assembly.

公开(公告)号：US12119763B2

公开(公告)日：2024-10-15

申请号：US17979215

申请日：2022-11-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Vinod Chowdary Peddi ,  Cheng Gong ,  Le Chang ,  Song He

IPC: H02P21/22 ,  H02P6/10 ,  H02P29/50

CPC classification number: H02P21/22 ,  H02P6/10 ,  H02P29/50

Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. A controller is in communication with the electric motor and is adapted to select at least one harmonic order for a harmonic current command. The controller is adapted to define a plurality of operating regions, including a first operating region, a second operating region and a third operating region, each associated with a respective objective function for generating the harmonic current command. The controller is adapted to operate the harmonic current command with four degrees of freedom by selectively varying a q-axis current magnitude, a d-axis current magnitude, a q-axis phase and a d-axis phase as a function of the torque and a motor speed.

公开(公告)号：US20240154555A1

公开(公告)日：2024-05-09

申请号：US17979215

申请日：2022-11-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Vinod Chowdary Peddi ,  Cheng Gong ,  Le Chang ,  Song He

IPC: H02P21/22

CPC classification number: H02P21/22

Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. A controller is in communication with the electric motor and is adapted to select at least one harmonic order for a harmonic current command. The controller is adapted to define a plurality of operating regions, including a first operating region, a second operating region and a third operating region, each associated with a respective objective function for generating the harmonic current command. The controller is adapted to operate the harmonic current command with four degrees of freedom by selectively varying a q-axis current magnitude, a d-axis current magnitude, a q-axis phase and a d-axis phase as a function of the torque and a motor speed.