Patents by Inventor Dianxun XIAO

Dianxun XIAO 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).

  • Methods and systems for detecting a rotor position and rotor speed of an alternating current electrical machine
    Patent number: 11394327
    Abstract: A method for determining rotor characteristic of an alternating current (AC) electrical machine includes obtaining a reference voltage signal, one or more phase currents, and rotor data. The method includes determining orthogonal components of an extended back electromotive force (BEMF) model of the AC electrical machine based on the reference voltage signal, the one or more phase current characteristics, and the rotor data. The method includes determining a product of the orthogonal components of the extended BEMF model. The method includes determining a squared-magnitude of the orthogonal components of the extended BEMF mode. The method includes determining the rotor characteristic of the AC electrical machine based on the product of the orthogonal components and the squared-magnitude of the orthogonal components.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: July 19, 2022
    Assignee: BorgWarner Inc.
    Inventors: Shamsuddeen Nalakath, Dianxun Xiao, Jia Xiu Dong, Gaoliang Fang, Ali Emadi, Yingguang Sun, Jason Wiseman
  • METHODS AND SYSTEMS FOR DETECTING A ROTOR POSITION AND ROTOR SPEED OF AN ALTERNATING CURRENT ELECTRICAL MACHINE
    Publication number: 20210336572
    Abstract: A method for determining rotor characteristic of an alternating current (AC) electrical machine includes obtaining a reference voltage signal, one or more phase currents, and rotor data. The method includes determining orthogonal components of an extended back electromotive force (BEMF) model of the AC electrical machine based on the reference voltage signal, the one or more phase current characteristics, and the rotor data. The method includes determining a product of the orthogonal components of the extended BEMF model. The method includes determining a squared-magnitude of the orthogonal components of the extended BEMF mode. The method includes determining the rotor characteristic of the AC electrical machine based on the product of the orthogonal components and the squared-magnitude of the orthogonal components.
    Type: Application
    Filed: April 16, 2021
    Publication date: October 28, 2021
    Inventors: Shamsuddeen NALAKATH, Dianxun XIAO, Jia Xiu DONG, Gaoliang FANG, Ali EMADI, Yingguang SUN, Jason WISEMAN