Patents by Inventor Doo Ung KIM

Doo Ung KIM 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).

  • System and method for controlling a voltage unbalance in a low-voltage direct current distribution system
    Patent number: 10152069
    Abstract: A system for controlling voltage unbalance in a direct current distribution system includes a measurement processor configured to measure a positive load current, and a negative load current at a first load point, including a first load connected to a positive line and a neutral line and a second load connected to the neutral line and a negative line, and at a second load point in a power distribution system; and a control processor configured to determine whether to activate a first load point switching signal based on the positive and negative load currents at the first and second load points to control the first load point to switch the connections of the first load and the second load between the positive line and the negative line.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: December 11, 2018
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Chul Hwan Kim, Gi Hyeon Gwon, Tack Hyun Jung, Joon Han, Yun Sik Oh, Doo Ung Kim, Chul Ho Noh
  • SYSTEM AND METHOD FOR CONTROLLING A VOLTAGE UNBALANCE IN A LOW-VOLTAGE DIRECT CURRENT DISTRIBUTION SYSTEM
    Publication number: 20160266592
    Abstract: A system for controlling voltage unbalance in a direct current distribution system includes a measurement processor configured to measure a positive load current, and a negative load current at a first load point, including a first load connected to a positive line and a neutral line and a second load connected to the neutral line and a negative line, and at a second load point in a power distribution system; and a control processor configured to determine whether to activate a first load point switching signal based on the positive and negative load currents at the first and second load points to control the first load point to switch the connections of the first load and the second load between the positive line and the negative line.
    Type: Application
    Filed: April 29, 2016
    Publication date: September 15, 2016
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Chul Hwan KIM, Gi Hyeon GWON, Tack Hyun JUNG, Joon HAN, Yun Sik OH, Doo Ung KIM, Chul Ho NOH