Patents by Inventor Hyenjun Choi

Hyenjun Choi 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).

  • Multi-circuit DC breaking system
    Patent number: 11855438
    Abstract: A multi-circuit DC breaking system is proposed. According to an exemplary embodiment of the present technique, there may be an advantage that by combining current-limiting technology and multi-circuit breaking technology, a failure may be quickly detected, a magnitude of a fault current may be firstly limited, and a breaking operation is performed, in a range of various fault currents, by distributing the fault currents to some circuits of multi-circuits configured in parallel, thereby easily increasing the capacity thereof.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: December 26, 2023
    Assignee: GREEN ENERGY INSTITUTE
    Inventors: Hyenjun Choi, Jihoon Park, Hyewon Choi, Insung Jeong
  • System for and method of frequency control of variable-speed wind power generator
    Patent number: 11713746
    Abstract: A system for and a method of frequency control of a variable-speed wind power generator are proposed. According to an implementation example of the present technology, there is an advantage in which the present technology may be involved in a frequency control of the system, thereby stabilizing the frequency of the system by controlling the frequency of the variable-speed wind power generator on the basis of a gain being varied according to a speed of a rotor.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: August 1, 2023
    Inventors: Hyenjun Choi, Jihoon Park, Hyewon Choi
  • SYSTEM FOR AND METHOD OF FREQUENCY CONTROL OF VARIABLE-SPEED WIND POWER GENERATOR
    Publication number: 20220307469
    Abstract: A system for and a method of frequency control of a variable-speed wind power generator are proposed. According to an implementation example of the present technology, there is an advantage in which the present technology may be involved in a frequency control of the system, thereby stabilizing the frequency of the system by controlling the frequency of the variable-speed wind power generator on the basis of a gain being varied according to a speed of a rotor.
    Type: Application
    Filed: March 23, 2020
    Publication date: September 29, 2022
    Inventors: Hyenjun Choi, Jihoon Park, Hyewon Choi
  • MULTI-CIRCUIT DC BREAKING SYSTEM
    Publication number: 20210376590
    Abstract: A multi-circuit DC breaking system is proposed. According to an exemplary embodiment of the present technique, there may be an advantage that by combining current-limiting technology and multi-circuit breaking technology, a failure may be quickly detected, a magnitude of a fault current may be firstly limited, and a breaking operation is performed, in a range of various fault currents, by distributing the fault currents to some circuits of multi-circuits configured in parallel, thereby easily increasing the capacity thereof.
    Type: Application
    Filed: August 5, 2021
    Publication date: December 2, 2021
    Inventors: Hyenjun Choi, Jihoon Park, Hyewon Choi, Insung Jeong