Patents by Inventor Lengfei Yu

Lengfei Yu 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 FOR ESTIMATING THE ANGULAR POSITION OF A ROTOR OF AN ELECTRIC DRIVE SYSTEM
    Publication number: 20180226906
    Abstract: The present invention has for object a method for estimating the angular position of a rotor in relation to a stator in a rotary electric machine, such as an electric machine of an electric or hybrid motorisation system, comprising: estimating the angular position and/or of the rotation speed of the rotor by a method of injecting high frequency signals as long as the absolute value of the rotation speed of the rotor, derived from said angular position, is less than a first predefined threshold; estimating the angular position and/or of the rotation speed of the rotor by a model coming from a learning method as long as the absolute value of the rotation speed of the rotor, derived from said angular position, is greater than a second predefined threshold.
    Type: Application
    Filed: February 7, 2018
    Publication date: August 9, 2018
    Inventors: Keyu Chen, Wided Zine, Lengfei Yu, Zaatar Makni