Patents by Inventor Wanqing YANG

Wanqing YANG 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).

  • System and method for controlling active clamp flyback converter
    Patent number: 11770076
    Abstract: Disclosed are a system and method for controlling an active clamp flyback (ACF) converter. The system includes: a drive module configured to control turning-on or turning-off of a main switching transistor SL and a clamp switching transistor SH; a main switching transistor voltage sampling circuit configured to sample a voltage drop between an input terminal and an output terminal of the main switching transistor SL; a first comparator connected to the main switching transistor voltage sampling circuit and configured to determine whether a sampled first sampling voltage is a positive voltage or a negative voltage; and a dead time calculation module configured to adjust, according to an output of the first comparator and a main switching transistor control signal DUTYL of a current cycle, a clamp switching transistor control signal DUTYH of next cycle outputted by the drive module.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: September 26, 2023
    Assignees: SOUTHEAST UNIVERSITY, CSMC TECHNOLOGIES FAB2 CO., LTD.
    Inventors: Shen Xu, Minggang Chen, Wanqing Yang, Dejin Wang, Rui Jiang, Weifeng Sun, Longxing Shi
  • SYSTEM AND METHOD FOR CONTROLLING ACTIVE CLAMP FLYBACK CONVERTER
    Publication number: 20220069718
    Abstract: Disclosed are a system and method for controlling an active clamp flyback (ACF) converter. The system includes: a drive module configured to control turning-on or turning-off of a main switching transistor SL and a clamp switching transistor SH; a main switching transistor voltage sampling circuit configured to sample a voltage drop between an input terminal and an output terminal of the main switching transistor SL; a first comparator connected to the main switching transistor voltage sampling circuit and configured to determine whether a sampled first sampling voltage is a positive voltage or a negative voltage; and a dead time calculation module configured to adjust, according to an output of the first comparator and a main switching transistor control signal DUTYL of a current cycle, a clamp switching transistor control signal DUTYH of next cycle outputted by the drive module.
    Type: Application
    Filed: June 19, 2020
    Publication date: March 3, 2022
    Inventors: Shen XU, Minggang CHEN, Wanqing YANG, Dejin WANG, Rui JIANG, Weifeng SUN, Longxing SHI