Patents by Inventor Sigui ZHANG

Sigui ZHANG 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).

  • Method and apparatus for controlling reverse current of phase-shifted full-bridge circuit
    Patent number: 12294310
    Abstract: A control method includes determining an error value of a reverse input current of a phase-shifted full-bridge circuit based on sampling and reference values of the reverse input current, determining a compensation control quantity of a switch drive signal of the phase-shifted full-bridge circuit based on the error value. The compensation control quantity corresponds to a period or a duty cycle of the switch drive signal. The method further includes determining period and duty cycle control quantities of the switch drive signal based on the compensation control quantity. The period control quantity is within a value range of the period of the switch drive signal, and the duty cycle control quantity is within a value range of the duty cycle of the switch drive signal. The method also includes controlling the switch drive signal based on the period control quantity and the duty cycle control quantity.
    Type: Grant
    Filed: May 11, 2023
    Date of Patent: May 6, 2025
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
    Inventors: Qinyuan Tian, Huanle Zhou, Sigui Zhang, Jinfeng Gao, Meng Li
  • METHOD AND APPARATUS FOR CONTROLLING REVERSE CURRENT OF PHASE-SHIFTED FULL-BRIDGE CIRCUIT
    Publication number: 20230283162
    Abstract: A control method includes determining an error value of a reverse input current of a phase-shifted full-bridge circuit based on sampling and reference values of the reverse input current, determining a compensation control quantity of a switch drive signal of the phase-shifted full-bridge circuit based on the error value. The compensation control quantity corresponds to a period or a duty cycle of the switch drive signal. The method further includes determining period and duty cycle control quantities of the switch drive signal based on the compensation control quantity. The period control quantity is within a value range of the period of the switch drive signal, and the duty cycle control quantity is within a value range of the duty cycle of the switch drive signal. The method also includes controlling the switch drive signal based on the period control quantity and the duty cycle control quantity.
    Type: Application
    Filed: May 11, 2023
    Publication date: September 7, 2023
    Inventors: Qinyuan TIAN, Huanle ZHOU, Sigui ZHANG, Jinfeng GAO, Meng LI