Patents by Inventor Guangqun LI

Guangqun 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).

  • Totem pole bridgeless PFC power converters
    Patent number: 11750087
    Abstract: An electric power supply includes a totem pole bridgeless PFC power converter. The PFC power converter includes an input for coupling to an AC power source, an output, four switching devices coupled between the input and the output, two diodes coupled between the four switching devices and the input, a first inductor coupled between the four switching devices and the two diodes, and a second inductor coupled between the two diodes and the input. Other example electric power supplies and totem pole bridgeless PFC power converters are also disclosed.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: September 5, 2023
    Assignee: Astec International Limited
    Inventors: Jun Liu, Guangqun Li, Liren Wang
  • Totem Pole Bridgeless PFC Power Converters
    Publication number: 20200161962
    Abstract: An electric power supply includes a totem pole bridgeless PFC power converter. The PFC power converter includes an input for coupling to an AC power source, an output, four switching devices coupled between the input and the output, two diodes coupled between the four switching devices and the input, a first inductor coupled between the four switching devices and the two diodes, and a second inductor coupled between the two diodes and the input. Other example electric power supplies and totem pole bridgeless PFC power converters are also disclosed.
    Type: Application
    Filed: May 24, 2018
    Publication date: May 21, 2020
    Inventors: Jun LIU, Guangqun LI, Liren WANG