Patents by Inventor Khai Nguyen

Khai Nguyen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250236196
    Abstract: A system for controlling charging and discharging of a battery assembly of a vehicle includes an outlet and a power module including a charging circuit having a bidirectional alternating current (AC)-direct current (DC) converter and a split phase inverter connected to a common transformer. A controller is configured to control the power module according to at least one of a plurality of operating modes including a charging mode in which AC power charges the battery assembly via the charging circuit. The operating modes include a simultaneous charging and discharging mode in which the power module generates a split phase voltage including a first AC voltage and a second AC voltage, the first AC voltage being out of phase with the second AC voltage, where the first AC voltage is applied to charge the battery assembly and the second AC voltage is provided to an external system via the outlet.
    Type: Application
    Filed: January 22, 2024
    Publication date: July 24, 2025
    Inventors: Dhanya Sankaran, Khorshed Mohammed Alam, Minh-Khai Nguyen, Rasoul Hosseini
  • Patent number: 12362696
    Abstract: A method for control of an alternating current (AC) electric motor through a voltage inverter having a plurality of electric switches with on-off states that collectively define a plurality of non-zero vectors angularly disposed about a common origin includes through one or more controllers, calculating a rotating voltage reference vector to apply to the AC electric motor through the voltage inverter. The method also includes through one or more controllers, calculating voltage inverter switching times using a first subset of the plurality of non-zero vectors, the first subset including fewer than all of the plurality of non-zero vectors and including no adjacent non-zero vectors, to synthesize the rotating voltage reference vector. Additionally, the method includes through the voltage inverter, applying the rotating voltage reference vector to the AC electric motor.
    Type: Grant
    Filed: October 3, 2023
    Date of Patent: July 15, 2025
    Assignee: GM Global Technology Operations LLC
    Inventors: Minh-Khai Nguyen, Yilun Luo
  • Patent number: 12321807
    Abstract: Methods, systems, and non-transitory computer readable media are configured to perform operations comprising determining, by a device, one or more parameters and associated parameter values of a network operating condition; storing, by the device, data associated with on the one or more parameters and associated parameter values in a Near-Field Communication (NFC) device of the device; and providing, by the device, the data to a computing system that is different from the device.
    Type: Grant
    Filed: October 31, 2023
    Date of Patent: June 3, 2025
    Assignee: VeEX Inc.
    Inventors: Paul Chang, Cyrille Morelle, Ildefonso Miguel Polo, Cesar Kyle Della Casil, Monica Hua, Tri Khai Nguyen, Eugene Belianka, Dmitriy Popesku
  • Patent number: 12273642
    Abstract: Examples include an image sensor comprising a pixel array having at least one column of addressable pixel sensors, and a column amplifier coupled to the at least one column of addressable pixel sensors, the column amplifier comprising a transistor bank including a plurality of transistors, and mode select circuitry coupled to the transistor bank and configured to establish one or more connections among the plurality of transistors to configure the column amplifier to operate in one of a differential mode of operation and a single-ended mode of operation.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: April 8, 2025
    Assignee: FAIRCHILD IMAGING, INC.
    Inventors: Hung Trong Do, Khai Nguyen, Stephen W. Mims, Alexander Lu, Kwang Bo Cho, Angel Rogelio Lopez
  • Publication number: 20250112578
    Abstract: A method for control of an alternating current (AC) electric motor through a voltage inverter having a plurality of electric switches with on-off states that collectively define a plurality of non-zero vectors angularly disposed about a common origin includes through one or more controllers, calculating a rotating voltage reference vector to apply to the AC electric motor through the voltage inverter. The method also includes through one or more controllers, calculating voltage inverter switching times using a first subset of the plurality of non-zero vectors, the first subset including fewer than all of the plurality of non-zero vectors and including no adjacent non-zero vectors, to synthesize the rotating voltage reference vector. Additionally, the method includes through the voltage inverter, applying the rotating voltage reference vector to the AC electric motor.
    Type: Application
    Filed: October 3, 2023
    Publication date: April 3, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Minh-Khai Nguyen, Yilun Luo
  • Publication number: 20250079843
    Abstract: A vehicle to load inverter module (V2LIM) based onboard charger (OBC). The V2LIM based OBC may include an alternating current to direct current (AC/DC) converter having an AC/DC input and an AC/DC output, a direct current to direct current (DC/DC) converter having a DC/DC input and a DC/DC output, and a direct current to alternating current (DC/AC) converter having a DC/AC input and a DC/AC output, and a controller configured for controlling the AC/DC converter, the DC/DC converter, and the DC/AC converter according to a split-phase load powering mode.
    Type: Application
    Filed: September 6, 2023
    Publication date: March 6, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Minh-Khai Nguyen, Lei Hao, Samantha Gunter Miller
  • Patent number: 12242920
    Abstract: Methods, systems, and non-transitory computer readable media are configured to perform operations comprising determining, by a device, one or more parameters and associated parameter values of a network operating condition; generating, by the device, a code based on the one or more parameters and associated parameter values; and providing, by the device, the code through an interface of the device, the code processable by a computing system.
    Type: Grant
    Filed: April 12, 2023
    Date of Patent: March 4, 2025
    Assignee: VeEX Inc.
    Inventors: Cyrille Morelle, Ildefonso Miguel Polo, Cesar Kyle Della Casil, Monica Hua, Tri Khai Nguyen, Eugene Belianka, Dmitriy Popesku
  • Publication number: 20250026216
    Abstract: Embodiments include an electric vehicle having a charging port configured to receive an alternating current (AC) power, a direct current (DC) battery, and a bidirectional inverter configured to convert AC power to DC power and to convert DC power to AC power, the bidirectional inverter is selectively connected to the DC battery by propulsion switches. The electric vehicle also includes an AC motor connected to the bidirectional inverter and selectively connected to the charging port by a first charging switch, an isolated DC/DC converter motor selectively connected to the DC battery via a second charging switch and a third charging switch, and a processor configured to control the operation of the propulsion switches, the first charging switch, the second charging switch, and the third charging switch based on an operational mode of the electric vehicle.
    Type: Application
    Filed: July 19, 2023
    Publication date: January 23, 2025
    Inventors: Minh-Khai Nguyen, Lei Hao, Chandra S. Namuduri, Sanjeev M. Naik
  • Patent number: 12190199
    Abstract: Methods, systems, and non-transitory computer readable media are configured to perform operations comprising obtaining, by a server system, encoded data in a URL contained in a code associated with a test performed on a communications network; decoding, by the server system, the encoded data to determine at least one of measurement data or contextual data associated with the test; providing, by the server system, the at least one of measurement data or contextual data on a page for presentation on a computing device.
    Type: Grant
    Filed: April 12, 2023
    Date of Patent: January 7, 2025
    Assignee: VeEX Inc.
    Inventors: Cyrille Morelle, Ildefonso Miguel Polo, Cesar Kyle Della Casil, Monica Hua, Tri Khai Nguyen, Eugene Belianka, Dmitriy Popesku
  • Publication number: 20240429713
    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.
    Type: Application
    Filed: June 22, 2023
    Publication date: December 26, 2024
    Inventors: Chandra S. Namuduri, Rashmi Prasad, Suresh Gopalakrishnan, Yilun Luo, Khorshed Mohammed Alam, Minh-Khai Nguyen
  • Publication number: 20240356413
    Abstract: An alternating current (AC) motor system includes an AC motor with a rotor and a stator with multi-phase AC stator windings. The system also includes a power inverter that generates a multi-phase AC voltage, an AC bus that connects the power inverter to the stator windings, an AC choke that surrounds the AC bus, and a current sensor with a coil wound on or surrounded by the AC choke. The current sensor measures common mode current in the AC bus, and is used in pulse width modulation or slew rate control of the power inverter, ensuring smooth operation and reducing the risk of damage due to common mode current.
    Type: Application
    Filed: April 21, 2023
    Publication date: October 24, 2024
    Inventors: Muhammad Hussain Alvi, Yilun Luo, Minh-Khai Nguyen, Alireza Fatemi
  • Publication number: 20240356361
    Abstract: An electric vehicle includes a system performing a method of charging a battery of the electric vehicle. The system includes an electrical motor having a rotor and a plurality of windings. The vehicle is turned off to allow the rotor to come to rest at an initial rotor position. The processor controls a current through the motor to rotate the rotor to locate a boundary of an electrical lash region associated with the rotor, determines a selected winding of the plurality of windings having a phase vector located close to the electrical lash region, deactivates the selected winding, controls flow of a first current through the motor with the selected winding deactivated to rotate the rotor towards a direction of the selected winding, and controls flow of a second current from a charging station to the battery through the electric motor with the rotor rotated towards the selected winding.
    Type: Application
    Filed: April 20, 2023
    Publication date: October 24, 2024
    Inventors: Dongxu Li, Minh-Khai Nguyen, Avoki M. Omekanda, Chandra S. Namuduri, Rashmi Prasad, Lei Hao
  • Patent number: 12126928
    Abstract: Examples include column readout amplifiers and image sensors including same. In one example, a column readout amplifier includes a signal amplifier having an amplifier output and first and second amplifier inputs, a filter capacitor having first and second terminals, the second terminal connected to a ground terminal, a buffer amplifier having a buffer amplifier input and a buffer amplifier output, a switching network configured to switchably connect the amplifier output to the buffer amplifier input and the buffer amplifier output to the first terminal of the filter capacitor during a first time period, and to switchably connect the amplifier output directly to the first terminal of the filter capacitor during a second time period, and a low-pass filter connected in a feedback path of the signal amplifier between the amplifier output and the first amplifier input, the low-pass filter including a series resistor and a capacitor.
    Type: Grant
    Filed: December 29, 2022
    Date of Patent: October 22, 2024
    Assignee: BAE Systems Imaging Solutions Inc.
    Inventors: Hung T. Do, Khai Nguyen, Alexander Lu, Stephen W. Mims, Kwang Bo Cho, Angel Rogelio Lopez
  • Publication number: 20240308379
    Abstract: A vehicle, system and method of charging the vehicle. The vehicle includes a battery, a first electric motor coupled to the battery, a second electric motor coupled to the battery, and a switch for forming a circuit between a charging station and the battery through the first electric motor and the second electric motor. A processor controls a configuration of the switch and commences charging of the battery from the charging station through the first electric motor and the second electric motor.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 19, 2024
    Inventors: Rashmi Prasad, Minh-Khai Nguyen, Chandra S. Namuduri
  • Patent number: 12034324
    Abstract: An electrified vehicle may include a plurality of electric drive units, a plurality of battery packs, a plurality of charge ports and a plurality of controllable switches. The switches may be controlled to flexibly configure power transfer into and out of the vehicle through one or more charge ports affecting one or more battery packs in parallel or individually passively or actively through inverter integrated converter charge transfer.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: July 9, 2024
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Chandra S. Namuduri, Rashmi Prasad, Minh-Khai Nguyen
  • Publication number: 20240223920
    Abstract: Examples include column readout amplifiers and image sensors including same. In one example, a column readout amplifier includes a signal amplifier having an amplifier output and first and second amplifier inputs, a filter capacitor having first and second terminals, the second terminal connected to a ground terminal, a buffer amplifier having a buffer amplifier input and a buffer amplifier output, a switching network configured to switchably connect the amplifier output to the buffer amplifier input and the buffer amplifier output to the first terminal of the filter capacitor during a first time period, and to switchably connect the amplifier output directly to the first terminal of the filter capacitor during a second time period, and a low-pass filter connected in a feedback path of the signal amplifier between the amplifier output and the first amplifier input, the low-pass filter including a series resistor and a capacitor.
    Type: Application
    Filed: December 29, 2022
    Publication date: July 4, 2024
    Applicant: BAE Systems Imaging Solutions Inc.
    Inventors: Hung T. Do, Khai Nguyen, Alexander Lu, Stephen W. Mims, Kwang Bo Cho, Angel Rogelio Lopez
  • Publication number: 20240196115
    Abstract: Examples include an image sensor comprising a pixel array having at least one column of addressable pixel sensors, and a column amplifier coupled to the at least one column of addressable pixel sensors, the column amplifier comprising a transistor bank including a plurality of transistors, and mode select circuitry coupled to the transistor bank and configured to establish one or more connections among the plurality of transistors to configure the column amplifier to operate in one of a differential mode of operation and a single-ended mode of operation.
    Type: Application
    Filed: December 9, 2022
    Publication date: June 13, 2024
    Applicant: BAE Systems Imaging Solutions Inc.
    Inventors: Hung Trong Do, Khai Nguyen, Stephen W. Mims, Alexander Lu, Kwang Bo Cho, Angel Rogelio Lopez
  • Publication number: 20240186811
    Abstract: A charging system of a vehicle includes an inverter of a propulsion system, the inverter connected to an electric motor and a battery system of the vehicle, and a switching assembly including a plurality of switches. The charging system also includes a controller configured to control the switching assembly to connect the inverter and the electric motor to a charge port of the vehicle and define a conversion circuit including one or more inverter switches and the electric motor by selectively connecting the charge port to the inverter or the electric motor and selectively connecting the battery system to the electric motor by the switching assembly. The controller is configured to operate the conversion circuit to adjust at least one of an input voltage for charging the battery system from a power source, and an output voltage for discharging the battery system to charge an external energy storage system.
    Type: Application
    Filed: December 2, 2022
    Publication date: June 6, 2024
    Inventors: Chandra S. Namuduri, Rashmi Prasad, Goro Tamai, Minh-Khai Nguyen
  • Publication number: 20240146075
    Abstract: An electrified vehicle may include a plurality of electric drive units, a plurality of battery packs, a plurality of charge ports and a plurality of controllable switches. The switches may be controlled to flexibly configure power transfer into and out of the vehicle through one or more charge ports affecting one or more battery packs in parallel or individually passively or actively through inverter integrated converter charge transfer.
    Type: Application
    Filed: October 28, 2022
    Publication date: May 2, 2024
    Inventors: Chandra S. Namuduri, Rashmi Prasad, Minh-Khai Nguyen
  • Patent number: 11890954
    Abstract: A multi-function onboard charging module (OBCM) operable for charging a battery pack using a wide variety of offboard charging systems, such as to enable the OBCM to charge a battery pack using electrical power provided from different types of direct current (DC), single-phase alternating current (AC), and/or three-phase AC offboard charging systems.
    Type: Grant
    Filed: September 21, 2022
    Date of Patent: February 6, 2024
    Assignee: GM Global Technology Operations LLC
    Inventors: Minh-Khai Nguyen, Sanjeev M. Naik