公开(公告)号：US20230364996A1

公开(公告)日：2023-11-16

申请号：US17740955

申请日：2022-05-10

Applicant: GM Global Technology Operations LLC

Inventor： Jiyu Zhang ,  Bojian Cao ,  Nomar S. Gonzalez Santini ,  Jeffrey Scott Piasecki ,  Tanvi Nagarale ,  Muhammad Hussain Alvi ,  Rashmi Prasad

IPC: B60L3/00

CPC classification number: B60L3/003 ,  B60L2240/525 ,  B60L2240/527

Abstract: Examples described herein provide a method that includes performing an electrical degradation analysis for a power inverter. The method further includes performing a thermal degradation analysis on the power inverter. The method further includes, responsive to at least one of a result of the electrical degradation analysis being indicative of an electrical issue of the power inverter or a result of the thermal degradation analysis being indicative of a thermal issue of the power inverter, implementing a corrective action for the power inverter.

公开(公告)号：US11581841B2

公开(公告)日：2023-02-14

申请号：US17208160

申请日：2021-03-22

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri

IPC: H02P27/08 ,  B60L50/60 ,  B60K6/28 ,  H02M7/5387 ,  B60L53/24 ,  B60L53/53 ,  B60L53/14

Abstract: An electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to a traction motor. The electrical system includes a plurality of machine windings connected between a plurality of first switches and the traction motor. Each switch of the plurality of first switches is configured to transition between a closed state to allow current flow between the power inverter and the traction motor. The electrical system includes a plurality of inductor windings connected between a plurality of second switches and an off-board power source. Each switch of the plurality of second switches is configured to transition between a closed state to allow current flow between the off-board power source and the power inverter to charge the RESS.

公开(公告)号：US20220302836A1

公开(公告)日：2022-09-22

申请号：US17208157

申请日：2021-03-22

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri

IPC: H02M3/158 ,  H02P27/08 ,  H02M7/5387 ,  B60L53/24

Abstract: An example electrical system is disclosed. The electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to a traction motor. The electrical system can include a plurality of machine windings connected between the power inverter and a switch. The switch can be configured to transition between a closed state to allow current flow from an off-board power source through the plurality of machine windings to the RESS and an open state to prevent current flow between the off-board power source and the plurality of machine windings.

公开(公告)号：US20220297557A1

公开(公告)日：2022-09-22

申请号：US17208152

申请日：2021-03-22

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri

IPC: B60L53/24 ,  H02P27/08 ,  H02M7/5387 ,  B60L53/14

Abstract: An example of a vehicle electrical system includes a rechargeable energy storage system (RESS) having a first voltage and a power inverter selectively connected to the RESS. The system further includes an electric motor having a plurality of machine windings with each of the machine windings including a polyphase terminal electrically connected to the power inverter. The machine windings further include a neutral terminal separate from the polyphase terminals and configured to electrically connect to an off-board power source having a second voltage that is below the first voltage of the RESS. The power inverter is configured to cycle between first and second operational states, such that the power inverter and the electric motor steps up the first voltage to the second voltage.

公开(公告)号：US20210242691A1

公开(公告)日：2021-08-05

申请号：US16780308

申请日：2020-02-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lei Hao ,  Yue-Yun Wang ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Rashmi Prasad ,  Madhusudan Raghavan

IPC: H02J7/00 ,  B60L53/18 ,  B60W10/08 ,  B60L53/24

Abstract: A system for use with a direct current fast-charging (DCFC) station includes a controller and battery system. The battery system includes first and second battery packs, and first, second, and third switches. The switches have ON/OFF conductive states commanded by the controller to connect the battery packs in a parallel-connected (P-connected) or series-connected (S-connected) configuration. An electric powertrain with one or more electric machines is powered via the battery system. First and second charge ports of the system are connectable to the station via a corresponding charging cable. The first charge port receives a low or high charging voltage from the station. The second charge port receives a low charging voltage. When the station can supply the high charging voltage to the first charge port, the controller establishes the S-connected configuration via the switches, and thereafter charges the battery system solely via the first charge port.

公开(公告)号：US20210237716A1

公开(公告)日：2021-08-05

申请号：US16780289

申请日：2020-02-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi Prasad ,  Sai Vishnu Aluru ,  Chandra S. Namuduri ,  Christopher A. Stanek

IPC: B60W30/06 ,  B60W10/04 ,  B60W10/20 ,  B60W50/00 ,  B60L53/66 ,  B60L53/36 ,  B60L53/126 ,  H04N5/247 ,  G06K9/00 ,  H04N5/225

Abstract: A method for operating an advanced park assist system of a vehicle includes a vehicle controller receiving, from front and side cameras mounted proximate front and side sections of the vehicle, real-time images of the vehicle's forward-facing and side-facing views. These images are analyzed to detect target elements present in the vehicle's forward-facing and/or side-facing views. Responsive to detecting a target element, heading control signals are transmitted to the vehicle's steering system to reposition the vehicle and thereby locate the target element at the center of the forward-facing view and at the top of the side-facing view. Speed control signals are transmitted to the vehicle's propulsion system to propel the vehicle such that the target element disappears from the side-facing view and moves to a calibrated distance from the vehicle body's front end. The control signals are modulated to align the vehicle with a target marker of the target element.

公开(公告)号：US20210237594A1

公开(公告)日：2021-08-05

申请号：US16780298

申请日：2020-02-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri ,  Sai Vishnu Aluru ,  Christopher A. Stanek

IPC: B60L53/124 ,  B60L53/36 ,  B60L53/126 ,  B60L50/60

Abstract: A method for operating an advanced driver assistance (ADAS) system of a motor vehicle includes a vehicle controller receiving, from side and end cameras mounted to the vehicle, camera signals indicative of real-time images of outboard-facing side and end views of the vehicle. The controller determines a region of interest (ROI) inset within each end/side view within which is expected foreign objects and/or hazards. These ROIs are analyzed to detect if a foreign object/hazard is present in the vehicle's end and/or side views. Responsive to detecting the foreign object/hazard, movement of the foreign object/hazard is tracked to determine if the foreign object/hazard moves towards or away from the vehicle's underbody region. If the foreign object/hazard moves to the underbody region, control signals are transmitted to the vehicle's propulsion and/or steering system to automate preventative action that prevents collision of the vehicle with and/or removes the foreign object/hazard from the underbody.

公开(公告)号：US20210086646A1

公开(公告)日：2021-03-25

申请号：US16579124

申请日：2019-09-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri

IPC: B60L53/62 ,  H02J7/02 ,  H02J7/00 ,  B60L53/30 ,  B60L53/18 ,  B60L53/16

Abstract: A dual-voltage charging station system for an alternating current (“AC”) power supply and a mobile platform having a charging port includes a charge coupler, an AC-to-DC conversion stage, a cable, and a controller. The charge coupler has AC pins and direct current (“DC”) pins configured to engage with respective AC and DC receptacles of the charging port. The conversion stage is connected to the charge coupler and the AC power supply, converts the supply voltage to a DC charging voltage, and relays an appropriate AC or DC accessory voltage. The cable connects to the charge coupler such that the AC pins receive the accessory voltage and the DC pins receive the DC charging voltage. The controller simultaneously delivers the accessory voltage and the DC voltage to the mobile platform via the AC pins and the DC pins, respectively.

公开(公告)号：US10259448B2

公开(公告)日：2019-04-16

申请号：US15239010

申请日：2016-08-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Norman K. Bucknor ,  Suresh Gopalakrishnan ,  Lei Hao ,  Derek F. Lahr ,  Dongxu Li ,  Shifang Li ,  Chandra S. Namuduri ,  Thomas W. Nehl ,  Avoki M. Omekanda ,  Rashmi Prasad ,  Farzad Samie ,  Aaron M. Sullivan

IPC: B60W10/06 ,  B60W10/08 ,  B60W10/30 ,  B60W20/13 ,  B60W20/40 ,  B60W20/50 ,  B60K6/26 ,  B60K6/48 ,  F02N11/04 ,  B60K6/387

Abstract: A hybrid vehicle propulsion includes an engine and a first electric machine, where each is configured to selectively provide torque to propel the vehicle. The propulsion system also includes a second electric machine coupled to the engine to provide torque to start the engine from an inactive state. A high-voltage power source is configured to power both of the first electric machine and the second electric machine over a high-voltage bus. The propulsion system further includes a controller programmed to deactivate the engine and propel the vehicle using the first electric machine in response to the vehicle being driven at a steady-state speed for a predetermined duration of time. The controller is also programmed to restart the engine using the second electric machine powered by the high-voltage power source.

公开(公告)号：US12291104B1

公开(公告)日：2025-05-06

申请号：US18501340

申请日：2023-11-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H02M7/42 ,  B60L15/00 ,  H02M1/088 ,  H02M1/12 ,  H02M7/483

Abstract: A multi-phase power inverter for an electric propulsion system includes a plurality of T-type multilevel power converters arranged between a high-voltage direct current (DC) power supply and an electric machine. Each of the plurality of T-type multilevel power converters is a solid-state integrated circuit that includes a positive DC power bus, a negative DC power bus, a neutral bus, and a plurality of semiconductor switches disposed in a stacked arrangement. The plurality of semiconductor switches is interconnected via the positive DC power bus, the negative DC power bus, and the neutral bus.