Patents by Inventor Kunming Cai

Kunming Cai 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).

  • AC chopping circuit and associated single-phase AC motor driving system
    Patent number: 11770093
    Abstract: According to some embodiments, AC chopping circuit includes a switching circuit, a synchronizing signal generating circuit, a switch driving circuit and an auxiliary power supplying circuit. In some examples, the switching circuit are coupled to an AC power source and a load. In certain examples, the synchronizing signal generating circuit provides a synchronizing signal which is related to a polarity of the AC power source. In some examples, the switching circuit is controlled based at least in part on the synchronizing signal.
    Type: Grant
    Filed: August 11, 2022
    Date of Patent: September 26, 2023
    Assignee: Xiamen Kiwi Instruments Corporation
    Inventors: Zongjie Zhou, Huijie Yu, Kunming Cai
  • AC CHOPPING CIRCUIT AND ASSOCIATED SINGLE-PHASE AC MOTOR DRIVING SYSTEM
    Publication number: 20230048479
    Abstract: According to some embodiments, AC chopping circuit includes a switching circuit, a synchronizing signal generating circuit, a switch driving circuit and an auxiliary power supplying circuit. In some examples, the switching circuit are coupled to an AC power source and a load. In certain examples, the synchronizing signal generating circuit provides a synchronizing signal which is related to a polarity of the AC power source. In some examples, the switching circuit is controlled based at least in part on the synchronizing signal.
    Type: Application
    Filed: August 11, 2022
    Publication date: February 16, 2023
    Applicant: Xiamen Kiwi Instruments Corporation
    Inventors: Zongjie Zhou, Huijie Yu, Kunming Cai
  • AC chopping circuit and associated single-phase AC motor driving system
    Patent number: 11437947
    Abstract: According to some embodiments, AC chopping circuit includes a switching circuit, a synchronizing signal generating circuit, a switch driving circuit and an auxiliary power supplying circuit. In some examples, the switching circuit are coupled to an AC power source and a load. In certain examples, the synchronizing signal generating circuit provides a synchronizing signal which is related to a polarity of the AC power source. In some examples, the switching circuit is controlled based at least in part on the synchronizing signal.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: September 6, 2022
    Assignee: Xiamen Kiwi Instruments Corporation
    Inventors: Zongjie Zhou, Huijie Yu, Kunming Cai
  • AC CHOPPING CIRCUIT AND ASSOCIATED SINGLE-PHASE AC MOTOR DRIVING SYSTEM
    Publication number: 20220060137
    Abstract: According to some embodiments, AC chopping circuit includes a switching circuit, a synchronizing signal generating circuit, a switch driving circuit and an auxiliary power supplying circuit. In some examples, the switching circuit are coupled to an AC power source and a load. In certain examples, the synchronizing signal generating circuit provides a synchronizing signal which is related to a polarity of the AC power source. In some examples, the switching circuit is controlled based at least in part on the synchronizing signal.
    Type: Application
    Filed: August 17, 2021
    Publication date: February 24, 2022
    Inventors: Zongjie Zhou, Huijie Yu, Kunming Cai