Patents by Inventor Hongfeng Liang

Hongfeng Liang 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).

  • Free-wheeling diode control method and apparatus and power switching apparatus
    Patent number: 10917014
    Abstract: A free-wheeling diode control method includes determining whether a sum of a first pulse width value of a free-wheeling diode obtained according to an inductance current law and a third pulse width value of a main control tube meets a first preset condition, obtaining a determining result, and controlling, according to the determining result, conduction of the free-wheeling diode according to the first pulse width value or a second pulse width value of the free-wheeling diode obtained according to a volt-second balance law.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: February 9, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Chengfeng Jiang, Hongfeng Liang
  • Free-Wheeling Diode Control Method and Apparatus and Power Switching Apparatus
    Publication number: 20200204077
    Abstract: A free-wheeling diode control method includes determining whether a sum of a first pulse width value of a free-wheeling diode obtained according to an inductance current law and a third pulse width value of a main control tube meets a first preset condition, obtaining a determining result, and controlling, according to the determining result, conduction of the free-wheeling diode according to the first pulse width value or a second pulse width value of the free-wheeling diode obtained according to a volt-second balance law.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Inventors: Chengfeng Jiang, Hongfeng Liang