Patents by Inventor Longgi Li

Longgi Li 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).

  • Control system with delayed protection for a three-level inverter
    Patent number: 11569758
    Abstract: A microcontroller unit for controlling a three-level inverter including delayed fault protection is provided. The microcontroller unit includes an input port configured to receive a trip signal from a fault detection module, and a plurality of EPWM modules, each configured to control a power switch within the three-level inverter. The microcontroller unit includes an auxiliary EPWM module configured to receive the trip signal and produce a delayed trip signal, and processing circuitry coupled with the input port, the plurality of EPWM modules, and the auxiliary EPWM module. The processing circuitry is configured to, in response to activation of the trip signal, direct one of the plurality of EPWM modules to shut off its corresponding power switch upon activation of the trip signal, and to direct a different one of the plurality of EPWM modules to shut off its corresponding power switch upon activation of the delayed trip signal.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: January 31, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Longgi Li, Wanling Zhang
  • CONTROL SYSTEM WITH DELAYED PROTECTION FOR A THREE-LEVEL INVERTER
    Publication number: 20210384844
    Abstract: A microcontroller unit for controlling a three-level inverter including delayed fault protection is provided. The microcontroller unit includes an input port configured to receive a trip signal from a fault detection module, and a plurality of EPWM modules, each configured to control a power switch within the three-level inverter. The microcontroller unit includes an auxiliary EPWM module configured to receive the trip signal and produce a delayed trip signal, and processing circuitry coupled with the input port, the plurality of EPWM modules, and the auxiliary EPWM module. The processing circuitry is configured to, in response to activation of the trip signal, direct one of the plurality of EPWM modules to shut off its corresponding power switch upon activation of the trip signal, and to direct a different one of the plurality of EPWM modules to shut off its corresponding power switch upon activation of the delayed trip signal.
    Type: Application
    Filed: June 7, 2021
    Publication date: December 9, 2021
    Inventors: Longgi Li, Wanling Zhang