Patents by Inventor Liu Xiao Dong

Liu Xiao Dong 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).

  • Phase feed-forward control for output voltage AC line ripple suppression in digital power supply
    Patent number: 9979306
    Abstract: A power supply has a first stage for performing AC-DC voltage conversion and power factor correction and a second stage for isolated DC-DC voltage conversion. The power supply includes a feed forward mechanism for transmitting phase information corresponding to AC ripple. The phase information is transmitted from the first stage to a secondary side of the second stage as a digital signal using a low speed optical coupler, where the phase information is utilized by a DC-DC digital controller to implement AC ripple suppression using both phase compensation and amplitude compensation.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: May 22, 2018
    Assignee: Flex Ltd.
    Inventors: HuaMin Xu, Chen Wei An, Liu Xiao Dong