Patents by Inventor Du Heo

Du Heo 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).

  • Bus bar for minimizing AC loss in transformer and method of designing the same
    Patent number: 11990270
    Abstract: An aspect of the present disclosure provides a bus bar as a winding in a core of a transformer includes multiple sub-bars arranged horizontally and connected in parallel so as to minimize an AC current in the transformer, and the sub-bars have different widths and thus resistances or impedances with respect to a current flowing through the sub-bars are the same. Another aspect of the present disclosure provides a method of designing a bus bar for resistance or impedance matching between multiple sub-bars included in the bus bar to share a current to minimize an AC current in the transformer. Another aspect of the present disclosure provides a transformer, for a DC-DC converter for use in a vehicle, which is manufactured by the method of designing a bus bar.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: May 21, 2024
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Tae Ho Bang, Deok Kwan Choi, Won Gon Kim, Min Heo, Ji Hoon Park, Kang Min Kim, A Ra Lee, Hyun Woo Shim, Du Ho Kim, Soo Min Jeon
  • Single-mode laser diode using strain-compensated multi-quantum-wells and method for manufacturing the same
    Publication number: 20050092979
    Abstract: The present invention relates to a single-mode laser diode and a method for manufacturing the same, which utilizes strain-compensated multi-quantum-wells.
    Type: Application
    Filed: September 16, 2004
    Publication date: May 5, 2005
    Inventors: Il Han, Jung Lee, Woon Cho, Won Choi, Du Heo