Patents by Inventor Melvin Co

Melvin Co 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).

  • AC-DC switching power converters with frequency variation in response to load changes
    Patent number: 8305051
    Abstract: A method of operating a switching power converter having at least one power switch controlled by a drive signal having a switching frequency is disclosed. The method includes monitoring an output power of the switching power converter, determining whether the output power has decreased below a threshold level and, in response to the output power decreasing below the threshold level, changing the switching frequency of the drive signal from a first switching frequency to a second switching frequency when an operating condition of the switching power converter is satisfied. Also disclosed are controllers and switching power converters (including PFC converters).
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: November 6, 2012
    Assignee: Astec International Limited
    Inventors: Vijay G. Phadke, Gordon Currie, Arlaindo V. Asuncion, Israel Beltran, Melvin Co
  • AC-DC Switching Power Converters With Frequency Variation in Response to Load Changes
    Publication number: 20110075458
    Abstract: A method of operating a switching power converter having at least one power switch controlled by a drive signal having a switching frequency is disclosed. The method includes monitoring an output power of the switching power converter, determining whether the output power has decreased below a threshold level and, in response to the output power decreasing below the threshold level, changing the switching frequency of the drive signal from a first switching frequency to a second switching frequency when an operating condition of the switching power converter is satisfied. Also disclosed are controllers and switching power converters (including PFC converters).
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Applicant: Astec International Limited
    Inventors: Vijay G. Phadke, Gordon Currie, Arlaindo V. Asuncion, Israel Beltran, Melvin Co