Patents by Inventor XunJiang DAI

XunJiang DAI 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).

  • Power measurements in switched mode power supplies
    Patent number: 11716016
    Abstract: A switched mode power supply (SMPS) includes a filter (202), a power factor correction (PFC) circuit (204), and a control circuit (206, 406) configured to determine various electrical parameters of the SMPS. In some embodiments, the control circuit (206, 406) is configured to determine a power line frequency and an AC input voltage based on an AC line voltage and an AC neural voltage. In other embodiments, the control circuit (206, 406) is configured to determine an AC input current based on a reactive current flowing through the filter (202) and a PFC AC current. In further embodiments, the control circuit (206, 406) is configured to report a value of an electrical parameter if value is determined to be accurate. Other example switch mode power supplies, control circuits and methods are also disclosed.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: August 1, 2023
    Assignee: Astec International Limited
    Inventors: PengFei Li, XiaoLin He, HaiJun Zhang, XunJiang Dai, Liang Meng
  • POWER MEASUREMENTS IN SWITCHED MODE POWER SUPPLIES
    Publication number: 20220286044
    Abstract: A switched mode power supply (SMPS) includes a filter (202), a power factor correction (PFC) circuit (204), and a control circuit (206, 406) configured to determine various electrical parameters of the SMPS. In some embodiments, the control circuit (206, 406) is configured to determine a power line frequency and an AC input voltage based on an AC line voltage and an AC neural voltage. In other embodiments, the control circuit (206, 406) is configured to determine an AC input current based on a reactive current flowing through the filter (202) and a PFC AC current. In further embodiments, the control circuit (206, 406) is configured to report a value of an electrical parameter if value is determined to be accurate. Other example switch mode power supplies, control circuits and methods are also disclosed.
    Type: Application
    Filed: May 23, 2022
    Publication date: September 8, 2022
    Inventors: PengFei Li, XiaoLin He, HaiJun Zhang, XunJiang Dai, Liang Meng
  • Power measurements in switched mode power supplies
    Patent number: 11349387
    Abstract: A switched mode power supply (SMPS) includes a filter, a power factor correction (PFC) circuit, and a control circuit configured to determine various electrical parameters of the SMPS. In some embodiments, the control circuit is configured to determine a power line frequency and an AC input voltage based on an AC line voltage and an AC neural voltage. In other embodiments, the control circuit is configured to determine an AC input current based on a reactive current flowing through the filter and a PFC AC current. In further embodiments, the control circuit is configured to report a value of an electrical parameter if value is determined to be accurate. Other example switch mode power supplies, control circuits and methods are also disclosed.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: May 31, 2022
    Assignee: Astec International Limited
    Inventors: XunJiang Dai, XiaoLin He, PengFei Li, Liang Meng, HaiJun Zhang
  • POWER MEASUREMENTS IN SWITCHED MODE POWER SUPPLIES
    Publication number: 20210408899
    Abstract: A switched mode power supply (SMPS) includes a filter, a power factor correction (PFC) circuit, and a control circuit configured to determine various electrical parameters of the SMPS. In some embodiments, the control circuit is configured to determine a power line frequency and an AC input voltage based on an AC line voltage and an AC neural voltage. In other embodiments, the control circuit is configured to determine an AC input current based on a reactive current flowing through the filter and a PFC AC current. In further embodiments, the control circuit is configured to report a value of an electrical parameter if value is determined to be accurate. Other example switch mode power supplies, control circuits and methods are also disclosed.
    Type: Application
    Filed: February 28, 2020
    Publication date: December 30, 2021
    Inventors: XunJiang DAI, XiaoLin HE, PengFei LI, Liang MENG, HaiJun ZHANG