Patents by Inventor Kuen Faat Yuen

Kuen Faat Yuen 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).

  • Power circuit and its operation method for regulating power transfer
    Patent number: 10289139
    Abstract: A power circuit for regulating power transfer includes: a power converter circuit having an input and an output and arranged to be connected between a power supply and a load to regulate power transfer therebetween; an input capacitor connected across the input of the power converter circuit; a series pass element arranged to be connected between the power supply and the input capacitor; and a control circuit, operably connected with the series pass element and the power converter circuit, for controlling operation of the series pass element. The power circuit further includes an input capacitor power control circuit operably connected with the input capacitor and arranged to provide power to the input capacitor to facilitate charging of the input capacitor when a voltage across the series pass element is detected to be above a voltage threshold as a result of an increase in a voltage of the power supply.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 14, 2019
    Assignee: City University of Hong Kong
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen
  • Power factor correction circuit for a power electronic system
    Patent number: 10177646
    Abstract: A power factor correction circuit for a power electronic system includes a series-pass device arranged to control an input characteristic of a power converter, and a control mechanism arranged to control an operation of the series-pass device during a power conversion process. The correction circuit increases a power factor of the power electronic system and/or reduces a harmonic distortion generated by the power converter to an electrical current supplied by a power source in the power electronic system.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: January 8, 2019
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fan
  • Current control circuit
    Patent number: 9991790
    Abstract: A current control apparatus arranged to regulate an electric current flowing between a load and an external electric circuit includes a current control loop having a current regulator arranged to manipulate an amount of the electric current flowing between the load and the external electric circuit; and a voltage control loop having a voltage regulator arranged to manipulate a voltage across the current regulator.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: June 5, 2018
    Assignee: City University of Hong Kong
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fan
  • Input filter for a power electronic system
    Patent number: 9698672
    Abstract: An input filter for a power electronic system includes a series-pass device arranged to control an input characteristic of a power converter, and a control mechanism arranged to control an operation of the series-pass device during a power conversion process, so as to filter a noise signal generated by the power converter from reaching a power source of the power electronic system.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: July 4, 2017
    Assignee: City University of Hong Kong
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fan
  • INPUT FILTER FOR A POWER ELECTRONIC SYSTEM
    Publication number: 20150364991
    Abstract: An input filter for a power electronic system includes a series-pass device arranged to control an input characteristic of a power converter, and a control mechanism arranged to control an operation of the series-pass device during a power conversion process, so as to filter a noise signal generated by the power converter from reaching a power source of the power electronic system.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 17, 2015
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fan
  • POWER FACTOR CORRECTION CIRCUIT FOR A POWER ELECTRONIC SYSTEM
    Publication number: 20150364989
    Abstract: A power factor correction circuit for a power electronic system comprising a series-pass device arranged to control an input characteristic of a power converter, and a control mechanism arranged to control an operation of the series-pass device during a power conversion process, so as to increase a power factor of the power electronic system and/or to reduce a harmonic distortion generated by the power converter to an electrical current supplied by a power source in the power electronic system.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 17, 2015
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fan
  • CURRENT CONTROL APPARATUS
    Publication number: 20150362933
    Abstract: A current control apparatus arranged to regulate an electric current flowing between a load and an external electric circuit includes a current control loop having a current regulator arranged to manipulate an amount of the electric current flowing between the load and the external electric circuit; and a voltage control loop having a voltage regulator arranged to manipulate a voltage across the current regulator.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 17, 2015
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fann