Patents by Inventor Yongle MAO

Yongle MAO 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 and apparatus for on-line estimation of initial position of surface permanent magnet electric machine
    Patent number: 10601354
    Abstract: The present invention relates to a method and apparatus for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed. The method (100) for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed comprises: injecting a high-frequency pulsating voltage signal; acquiring a d-axis high-frequency current signal responding to the high-frequency pulsating voltage signal; and estimating an initial position of the surface permanent magnet electric machine on the basis of a second harmonic of the d-axis high-frequency current signal.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: March 24, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Yongle Mao, Wei Zhang, Xiaoyun Zang
  • METHOD AND APPARATUS FOR ON-LINE ESTIMATION OF INITIAL POSITION OF SURFACE PERMANENT MAGNET ELECTRIC MACHINE
    Publication number: 20180375453
    Abstract: The present invention relates to a method and apparatus for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed. The method (100) for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed comprises: injecting a high-frequency pulsating voltage signal; acquiring a d-axis high-frequency current signal responding to the high-frequency pulsating voltage signal; and estimating an initial position of the surface permanent magnet electric machine on the basis of a second harmonic of the d-axis high-frequency current signal.
    Type: Application
    Filed: December 23, 2015
    Publication date: December 27, 2018
    Inventors: Yongle MAO, Wei ZHANG, Xiaoyun ZANG