公开(公告)号：US20250010761A1

公开(公告)日：2025-01-09

申请号：US18347874

申请日：2023-07-06

Applicant: GM Global Technology Operations LLC

Inventor： Muhammad Hussain Alvi ,  Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Junghoon Kim ,  Yilun Luo

IPC: B60L58/20 ,  B60L50/51 ,  H02M1/08 ,  H02M1/088 ,  H02M7/483

Abstract: A multi-level inverter control system includes a power storage system having a high voltage terminal, a low voltage terminal, and an intermediate voltage terminal. The intermediate voltage terminal is at a voltage between the high voltage terminal and the low voltage terminal. A multi-level inverter includes a plurality of switches, a high voltage input connected to the high voltage terminal, a low voltage input connected to the low voltage terminal, and an intermediate voltage input connected to the intermediate voltage terminal. A controller is controllably coupled to the multi-level inverter. The controller includes at least a processor and a memory. The memory stores instructions configured to cause the controller to operate the multi-level inverter in a three-level inverter mode, a full power two-level inverter mode, a first partial power two-level inverter mode and a second partial power two-level inverter mode.

公开(公告)号：US12179605B1

公开(公告)日：2024-12-31

申请号：US18343139

申请日：2023-06-28

Applicant: GM Global Technology Operations LLC

Inventor： Orgun A. Guralp ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri

IPC: B60L15/20 ,  B60L50/51 ,  B60L50/64

Abstract: A system for controlling a propulsion system of a vehicle includes a switching system including a first switching device connecting a battery system to a first set of windings of an electric motor, and a second switching device connecting the battery system to a second set of windings. The system also includes a controller configured to transition the propulsion system from an initial propulsion mode in which an initial voltage is applied to the electric motor, to a target mode in which a target voltage is applied. The transitioning includes controlling the first switching device to provide current to the first set of windings at the initial voltage to produce torque, and subsequently controlling the second switching device to cause the battery system to apply the target voltage to the second set of windings while the current is provided to the first set of windings at the initial voltage.

公开(公告)号：US12151588B2

公开(公告)日：2024-11-26

申请号：US17587632

申请日：2022-01-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mark Daniel Gottlieb ,  Venkata Prasad Atluri ,  Madhusudan Raghavan ,  Chandra S. Namuduri ,  Suresh Gopalakrishnan

IPC: B60L58/16 ,  B60L58/13 ,  H01M10/42

Abstract: A power control system for a battery system of a vehicle includes one or more supplemental protection devices that are connected to at least one of a first contactor, a second contactor, one of N fuses, and one of N vehicle loads. A battery management module is configured to measure and store a plurality of state of health parameters for the battery system and to selectively operate the one or more supplemental protection devices in a coverage gap between first and second coverage areas handled by the first contactor and the second contactor and the N fuses based on a calibration function and/or calibration parameters. A telematics system selectively sends the plurality of state of health parameters for the battery system to a remote server and to receive at least one of a new calibration function and new calibration parameters for the vehicle from the remote server.

公开(公告)号：US20240380334A1

公开(公告)日：2024-11-14

申请号：US18315081

申请日：2023-05-10

Applicant: GM Global Technology Operations LLC

Inventor： Muhammad Hussain Alvi ,  Renato Amorim Torres ,  Chandra S. Namuduri ,  Rashmi Prasad

IPC: H02M7/483 ,  B60L50/51

Abstract: A multilevel inverter includes a set of inverter switches arranged in a multilevel inverter topology. The multilevel inverter topology has a high voltage (V) input, a low voltage input and an intermediate voltage input. A first voltage source connects the high voltage input to the intermediate voltage input and a second voltage source connects the intermediate voltage input to the low voltage source.

公开(公告)号：US20240363288A1

公开(公告)日：2024-10-31

申请号：US18308201

申请日：2023-04-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Junghoon Kim ,  Muhammad Hussain Alvi ,  Rashmi Prasad ,  Chandra S. Namuduri ,  Yilun Luo

IPC: H01G4/30 ,  B60L50/60 ,  H01G4/228

CPC classification number: H01G4/30 ,  B60L50/60 ,  H01G4/228 ,  B60L2210/10 ,  B60L2210/40

Abstract: Aspects of the disclosure include a symmetric direct current (DC) link capacitor having a low parasitic equivalent series L-inductance (ESL). An exemplary capacitor can include one or more positive-dielectric-negative (PDN) stacks having a positive layer, a negative layer, and a dielectric layer between the positive layer and the negative layer. A first contact layer is electrically coupled to the positive layer on a sidewall of the one or more PDN stacks and a second contact layer is electrically coupled to the negative layer on the sidewall of the one or more PDN stacks. A positive terminal is electrically coupled to the first contact layer and a negative terminal is electrically coupled to the second contact layer.

公开(公告)号：US20240351473A1

公开(公告)日：2024-10-24

申请号：US18304003

申请日：2023-04-20

Applicant: GM Global Technology Operations LLC

Inventor： Mohamed Ahmed Kamel Ahmed ,  Chandra S. Namuduri

IPC: B60L58/18 ,  H02J7/00 ,  H02J7/34

CPC classification number: B60L58/18 ,  H02J7/0047 ,  H02J7/00712 ,  H02J7/342

Abstract: An electric vehicle, system and method of charge transfer at the electric vehicle. The vehicle includes a charging circuit and a processor. The charging circuit includes a first battery, a second battery and a motor winding. The processor determines a desired reference current of the motor winding, a first voltage of the first battery and a second voltage of the second battery, calculates a power loss for each of a plurality of conduction modes based on the desired reference current, the first voltage and the second voltage, wherein each of the plurality of conduction modes transfers charge between the first battery and the second battery, selects a conduction mode from the plurality of conduction modes that has a least power loss, establishes a duty cycle parameter for the selected mode, and applies the conduction mode and the duty cycle parameter to the charging circuit to transfer the charge.

公开(公告)号：US12095352B2

公开(公告)日：2024-09-17

申请号：US17826592

申请日：2022-05-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Lei Hao

IPC: H02M1/14 ,  B60L50/51 ,  B60L50/60 ,  H02P27/08 ,  H02M7/5395

CPC classification number: H02M1/143 ,  B60L50/51 ,  B60L50/60 ,  H02P27/085 ,  H02M7/5395

Abstract: A power control system for an electric vehicle comprises N power inverters configured to connect to a battery system of the electric vehicle. Each of the N power inverters includes a plurality of power switches, where N is an integer greater than one. The N power inverters are configured to connect to stator phase windings of N electric machines, respectively. A controller is configured to determine a switching frequency for the N electric machines and (N−1) phase offsets for (N−1) ones of the N electric machines, generate a set of pulse width modulation (PWM) switching signals at the switching frequency for a first one of the N power inverters, and output (N−1) sets of PWM switching signals to the (N−1) ones of the N electric machines based on the set of PWM switching signals and the (N−1) phase offsets.

公开(公告)号：US20240297516A1

公开(公告)日：2024-09-05

申请号：US18177522

申请日：2023-03-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chunhao J. Lee ,  Dongxu Li ,  Suresh Gopalakrishnan ,  Lei Hao ,  Chandra S. Namuduri

IPC: H02J7/00 ,  B60L50/50 ,  H02M3/04

CPC classification number: H02J7/0063 ,  B60L50/50 ,  H02J7/0068 ,  H02M3/04

Abstract: A system for supplying power to one or more electrical loads in a vehicle includes a conversion system connected to a battery system, the battery system configured to provide a voltage to a propulsion system of the vehicle via a propulsion bus, the conversion system including a conversion device and a pre-charge circuit selectively connected to the propulsion bus by a first switch, the conversion system selectively connected to the one or more electrical loads. The system also includes a controller configured to operate the conversion system to electrically connect the conversion device and the pre-charge circuit to the battery system and the one or more electrical loads, the controller configured to adjust a battery system voltage from the battery system to a load voltage of the one or more electrical loads based on a mismatch between the battery system voltage and the load voltage.

公开(公告)号：US12051985B2

公开(公告)日：2024-07-30

申请号：US17694865

申请日：2022-03-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lei Hao ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Dongxu Li

IPC: H02P25/18 ,  B60L50/50 ,  B60L53/16 ,  H02J7/02 ,  H02K3/28 ,  H02M7/797 ,  H02P27/08

CPC classification number: H02P25/18 ,  B60L50/50 ,  B60L53/16 ,  H02J7/02 ,  H02K3/28 ,  H02M7/797 ,  H02P27/08 ,  B60L2210/44

Abstract: An electric machine includes: a first stator winding including first and second stator winding portions; a second stator winding including third and fourth stator winding portions; a third stator winding including fifth and sixth stator winding portions, where inputs of the stator windings are configured to be connected to phases, respectively, of an inverter; and switches connected between the stator winding portions and outputs of a power source.

公开(公告)号：US12046946B2

公开(公告)日：2024-07-23

申请号：US17889017

申请日：2022-08-16

Applicant: GM Global Technology Operations LLC

Inventor： Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Norman K. Bucknor ,  Lyall Kenneth Winger ,  James Morrison ,  David W. Walters

IPC: H02J9/06 ,  B60L53/20 ,  B60L58/10 ,  G01R19/165 ,  H02J7/00

CPC classification number: H02J9/061 ,  B60L53/20 ,  B60L58/10 ,  G01R19/16576 ,  H02J7/0063 ,  H02J7/00712 ,  B60L2210/10

Abstract: A vehicle, an electrical system of the vehicle and a method of operating the vehicle. The electrical system includes a battery, an electrical load that draws power from the battery, a switch between the battery and the electrical load, and a processor. The processor is configured to measure a power drawn from the battery by the electrical load and open the switch to disconnect the battery from the electrical load when the power drawn by the electrical load matches a selected criterion.