Patents by Inventor Euicheol Nho

Euicheol Nho 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).

  • Publication number: 20080231252
    Abstract: The present invention relates to a sag-swell generator for generating power signal with sag, swell and outage for use in testing custom power devices. The sag-swell generator comprises: a supply voltage unit for providing a supply voltage; a variable voltage adjusting unit for controlling the supply voltage according to a voltage ratio; a variable voltage-side switch unit selectively connected to the variable voltage adjusting unit; a transformer-side switch unit composed of dual switches connected anti-parallel to each other; and a transformer, a primary side of which being connected to the transformer-side switch unit and a secondary side of which being serially connected to a load and a (?) terminal of the supply voltage.
    Type: Application
    Filed: January 14, 2004
    Publication date: September 25, 2008
    Inventors: Euicheol Nho, Sangsuk Lee