Patents by Inventor Hung Piu POON

Hung Piu POON 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 controlling power factor correction circuit, controller and system
    Patent number: 10491107
    Abstract: A method for controlling a power factor correction circuit includes detecting a stability degree of an input voltage of the power factor correction circuit, wherein the stability degree is at least one of a frequency or an amplitude deviation of the input voltage from a predetermined trend, adjusting a current control parameter of PID or PI according to the stability degree of the input voltage of the power factor correction circuit, and controlling at least one of a voltage loop and a current loop using the adjusted control parameter of the PID or the PI to adjust a control signal of the at least one switching circuit.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: November 26, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Hung Piu Poon
  • METHOD FOR CONTROLLING POWER FACTOR CORRECTION CIRCUIT, CONTROLLER AND SYSTEM
    Publication number: 20190222117
    Abstract: A method for controlling a power factor correction circuit includes detecting a stability degree of an input voltage of the power factor correction circuit, wherein the stability degree is at least one of a frequency or an amplitude deviation of the input voltage from a predetermined trend, adjusting a current control parameter of PID or PI according to the stability degree of the input voltage of the power factor correction circuit, and controlling at least one of a voltage loop and a current loop using the adjusted control parameter of the PID or the PI to adjust a control signal of the at least one switching circuit.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 18, 2019
    Inventor: Hung Piu POON