Patents by Inventor Jinlei Meng

Jinlei Meng 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 circuit monitoring
    Patent number: 11442115
    Abstract: A method for circuit monitoring includes detecting a waveform of first voltage at a DC-link capacitor in a power converter, the first voltage being generated by turning on a chopper circuit coupling in parallel to the DC-link; determining a phase angle shift of the waveform of first voltage with respect to a waveform of second voltage at a rectifier in the power converter or a power supply for the power converter; determining magnitude of the waveform of first voltage; and determining, based on at least one of the magnitude and the phase angle shift, a parameter indicative of a health condition of the DC-link capacitor. An apparatus is also provided.
    Type: Grant
    Filed: April 6, 2021
    Date of Patent: September 13, 2022
    Assignee: ABB SCHWEIZ AG
    Inventors: Jinlei Meng, Bo Wang, Haitao Deng
  • METHOD AND APPARATUS FOR CIRCUIT MONITORING
    Publication number: 20210223332
    Abstract: A method for circuit monitoring includes detecting a waveform of first voltage at a DC-link capacitor in a power converter, the first voltage being generated by turning on a chopper circuit coupling in parallel to the DC-link; determining a phase angle shift of the waveform of first voltage with respect to a waveform of second voltage at a rectifier in the power converter or a power supply for the power converter; determining magnitude of the waveform of first voltage; and determining, based on at least one of the magnitude and the phase angle shift, a parameter indicative of a health condition of the DC-link capacitor. An apparatus is also provided.
    Type: Application
    Filed: April 6, 2021
    Publication date: July 22, 2021
    Inventors: Jinlei Meng, Bo Wang, Haitao Deng