Patents by Inventor In Kwon BAE

In Kwon BAE 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).

  • Patent number: 7742264
    Abstract: Disclosed is provided a hybrid-type superconducting fault current limiter for rapidly limiting a fault current, the fault current limiter having a first circuit and a second circuit which are connected in parallel with each other, wherein the first circuit includes a superconductor and a circuit breaker which are connected in series with each other, and wherein the second circuit includes a driver having a driving coil and an electromagnetic repeller, a short contact connected in parallel with the driver, and a current limiting unit connected in series with a third circuit including the driver and the short contact. The hybrid-type superconducting fault current limiter comprises a power semiconductor element switch connected in series with the first circuit, the power semiconductor element switch normally maintaining an ON state and being activated and changed into an OFF state by a fault sensing signal generated according to an inflow of the fault current.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: June 22, 2010
    Assignees: Korea Electric Power Corporation, LS Industrial Systems Co., Ltd.
    Inventors: Ok-Bae Hyun, Hye-Rim Kim, Seong-Woo Yim, Jung-Wook Sim, Kwon-Bae Park, Bang-Wook Lee
  • Publication number: 20090195954
    Abstract: The present disclosure is related to a peak current limiting apparatus of the present disclosure comprising a trigger element serially connected between a power supply source and the load, diverting a fault current to other paths connected in parallel when the fault current exceeding a threshold is generated, a main contact switch serially connected between the trigger element and a load, a driving coil connected in parallel with the trigger element, and generating a repulsive force in response to the fault current to detach a contact point of the main contact switch, and a peak limiting impedance element serially connected between a connection node between the trigger element and the main contact switch and the driving coil, and limiting a first peak level of the fault current flowing through the driving coil to a predetermined level.
    Type: Application
    Filed: January 23, 2009
    Publication date: August 6, 2009
    Inventors: Jung Wook SIM, Kwon Bae Park, Gyeong Ho Lee
  • Patent number: 7558030
    Abstract: A resistive superconducting fault current limiter comprises: a superconducting limiter element which is in a superconductive state in the event of a normal current occurrence, and which is in a normal conductive state having a predetermined resistance when a fault current larger than a predetermined threshold current value flows; a superconducting serial coil serially connected to the superconducting limiter element so as to face each other so that a current loss can be minimized accordingly as currents flow in opposite directions thus to cancel magnetic fields, and having a threshold current value greater than the threshold current value of the superconducting limiter element by a predetermined ratio; and a normal conductor parallel coil connected to the superconducting limiter element in parallel and having a predetermined resistance smaller than the resistance of the superconducting limiter element when a fault current occurs, for preventing the superconducting limiter element from being overheated by divi
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: July 7, 2009
    Assignee: LS Industrial System Co., Ltd.
    Inventors: Bang-Wook Lee, Kwon-Bae Park
  • Patent number: 7545611
    Abstract: An electric power circuit protecting apparatus using a superconductor in an electric power system needing re-closing within a predetermined time from fault current blocking, comprising a main circuit breaker; a first superconductor element connected in series to the main circuit breaker; a first auxiliary switch to switch a circuit between the first superconductor element and the main circuit breaker; a second superconductor element connected in parallel to the first superconductor element and the first auxiliary switch; a second auxiliary switch to switch a circuit between the second superconductor element and the main circuit breaker; a first monitoring unit for detecting a voltage across the first superconductor element and for supplying a first switching control signal to the first auxiliary switch to be switched to the circuit open position, and a second switching control signal to the second auxiliary switch to be switched to the circuit close position; and a second monitoring unit for detecting a volta
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: June 9, 2009
    Assignee: LS Industrial Systems Co., Ltd.
    Inventors: Bang-Wook Lee, Kwon-Bae Park
  • Patent number: 7538991
    Abstract: Disclosed is a half-wave expulsion type superconducting fault-current limiter having an integral high speed switch module. The fault-current limiter has minimum superconducting elements and a circuit of which is formed in a hybrid type with an integral high speed switch module. The fault-current limiter supplies an electric power supplied from a power feeder to a system without loss thereof according to unique characteristics of the superconducting element when a normal current flows, and restricts an over current through a high speed switching contact point integrally inter-working with a driving coil and an arc changeover switch past a half period in a case that the over-current is generated by accidents such that electric power appliances, including circuit breakers in an electric power system, can be normally operated.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: May 26, 2009
    Assignee: LS Industrial Systems Co., Ltd.
    Inventors: Kwon-bae Park, Bang-wook Lee
  • Publication number: 20090052097
    Abstract: Disclosed is provided a hybrid-type superconducting fault current limiter for rapidly limiting a fault current, the fault current limiter having a first circuit and a second circuit which are connected in parallel with each other, wherein the first circuit includes a superconductor and a circuit breaker which are connected in series with each other, and wherein the second circuit includes a driver having a driving coil and an electromagnetic repeller, a short contact connected in parallel with the driver, and a current limiting unit connected in series with a third circuit including the driver and the short contact. The hybrid-type superconducting fault current limiter comprises a power semiconductor element switch connected in series with the first circuit, the power semiconductor element switch normally maintaining an ON state and being activated and changed into an OFF state by a fault sensing signal generated according to an inflow of the fault current.
    Type: Application
    Filed: December 28, 2007
    Publication date: February 26, 2009
    Applicants: KOREA ELECTRIC POWER CORPORATION, LS INDUSTRIAL SYSTEMS CO. Ltd.
    Inventors: Ok-Bae Hyun, Hye-Rim Kim, Seong-Woo Yim, Jung-Wook Sim, Kwon-Bae Park, Bang-Wook Lee
  • Publication number: 20080103051
    Abstract: Disclosed is a half-wave expulsion type superconducting fault-current limiter having an integral high speed switch module. The fault-current limiter has minimum superconducting elements and a circuit of which is formed in a hybrid type with an integral high speed switch module. The fault-current limiter supplies an electric power supplied from a power feeder to a system without loss thereof according to unique characteristics of the superconducting element when a normal current flows, and restricts an over current through a high speed switching contact point integrally inter-working with a driving coil and an arc changeover switch past a half period in a case that the over-current is generated by accidents such as thunder-stroke, earth fault and short circuit, such that electric power appliances such as circuit breakers in an electric power system can be normally operated.
    Type: Application
    Filed: December 15, 2006
    Publication date: May 1, 2008
    Inventors: Kwon-bae Park, Bang-wook Lee
  • Patent number: 7345858
    Abstract: Disclosed is a resistive superconducting fault current limiter capable of enhancing a current of a superconducting device thereof, capable of preventing heat generated at a linear coil, capable of removing a magnetic field generated through the linear coil when a normal current is applied to a circuit of a power system, and capable of using not only a BISCCO based superconducting device but also a YBCO based superconducting device with using a magnet generating device separated from the circuit of the power system so that a current of the power system can not flow to the linear coil of the resistive superconducting fault current limiter when a normal current flows to the power system.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: March 18, 2008
    Assignee: LG Industrial Systems Co., Ltd.
    Inventors: Bang-Wook Lee, Kwon-Bae Park
  • Publication number: 20080043382
    Abstract: The present invention relates to a complex superconducting fault current limiter which adds a current limiting reactor to a superconductor to protect the power line from a fault current, and more particularly, to a complex superconducting fault current limiter using a minimum number of superconducting fault current limiters, while avoiding series and parallel connections of a plurality of superconductors and coils, in order to economically manufacture the fault current limiter in a small size. A superconductor, a high speed switch, and a circuit breaker are connected in series to each other, and a first reactor with a low impedance and a second reactor with a high impedance are connected in parallel to the power line so as to provide a branch circuit for the current to the series circuit. A semiconductor switch is connected in parallel to the second reactor with a high impedance in accordance with the opening high speed switch.
    Type: Application
    Filed: December 27, 2006
    Publication date: February 21, 2008
    Applicant: LS INDUSTRIAL SYSTEMS CO., LTD.
    Inventors: Bang-Wook LEE, Kwon-Bae PARK
  • Patent number: 7301425
    Abstract: The present invention discloses a pancake-type bifilar winding module using a superconducting wire and a winding bobbin therefor.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: November 27, 2007
    Assignee: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Tae Kuk Ko, Duck Kwon Bae, Min Cheol Ahn
  • Publication number: 20070139832
    Abstract: An electric power circuit protecting apparatus using a superconductor in an electric power system needing re-closing within a predetermined time from fault current blocking, comprising a main circuit breaker; a first superconductor element connected in series to the main circuit breaker; a first auxiliary switch to switch a circuit between the first superconductor element and the main circuit breaker; a second superconductor element connected in parallel to the first superconductor element and the first auxiliary switch; a second auxiliary switch to switch a circuit between the second superconductor element and the main circuit breaker; a first monitoring unit for detecting a voltage across the first superconductor element and for supplying a first switching control signal to the first auxiliary switch to be switched to the circuit open position, and a second switching control signal to the second auxiliary switch to be switched to the circuit close position; and a second monitoring unit for detecting a volta
    Type: Application
    Filed: October 23, 2006
    Publication date: June 21, 2007
    Applicant: LS INDUSTRIAL SYSTEMS CO., LTD
    Inventors: Bang-Wook LEE, Kwon-Bae PARK
  • Publication number: 20070127171
    Abstract: A resistive superconducting fault current limiter comprises: a superconducting limiter element which is in a superconductive state in the event of a normal current occurrence, and which is in a normal conductive state having a predetermined resistance when a fault current larger than a predetermined threshold current value flows; a superconducting serial coil serially connected to the superconducting limiter element so as to face each other so that a current loss can be minimized accordingly as currents flow in opposite directions thus to cancel magnetic fields, and having a threshold current value greater than the threshold current value of the superconducting limiter element by a predetermined ratio; and a normal conductor parallel coil connected to the superconducting limiter element in parallel and having a predetermined resistance smaller than the resistance of the superconducting limiter element when a fault current occurs, for preventing the superconducting limiter element from being overheated by divi
    Type: Application
    Filed: June 30, 2006
    Publication date: June 7, 2007
    Applicant: LS INDUSTRIAL SYSTEM CO., LTD.
    Inventors: Bang-Wook LEE, Kwon-Bae PARK
  • Publication number: 20050068701
    Abstract: Disclosed is a resistive superconducting fault current limiter capable of enhancing a current of a superconducting device thereof, capable of preventing heat generated at a linear coil, capable of removing a magnetic field generated through the linear coil when a normal current is applied to a circuit of a power system, and capable of using not only a BISCCO based superconducting device but also a YBCO based superconducting device with using a magnet generating device separated from the circuit of the power system so that a current of the power system can not flow to the linear coil of the resistive superconducting fault current limiter when a normal current flows to the power system.
    Type: Application
    Filed: September 24, 2004
    Publication date: March 31, 2005
    Applicant: LG Industrial Systems Co., Ltd.
    Inventors: Bang-Wook Lee, Kwon-Bae Park
  • Publication number: 20040205607
    Abstract: A printing method using a multiple pages per side (Nup) function, and a computer readable recording medium storing a computer program to execute the printing method, includes processing and printing only data of a page set to be multiple printed as data to be multiple printed; or processing and printing data of a page to be printed according to N set for a group to which the page required to be printed belongs; or generating a number indicating the quantity of the multiple pages to be printed on a physical page according to a set printing environment and multiple-printing the plurality of pages together with corresponding page numbers according to the printing environment according to the processed data and the generated number of multiple pages; or reducing identical contents and copying the reduced contents by a predetermined number of times, and printing the copied result on a sheet of paper, in response to a user selecting a repetition printing function; or performing a multiple-printing operation using a
    Type: Application
    Filed: January 2, 2004
    Publication date: October 14, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: So-hye Kim, Ki-kwon Bae, Seung-Jin Cho, Seung-wan Lee
  • Patent number: 5812282
    Abstract: An apparatus for protecting a specific number in a facsimile system includes an operating panel having a protection key for activating a protection function, and a plurality of keys for enabling input of the specific number. A display unit displays a message indicating that the protection key has been input in response to the input of the protection key from the operating panel. A memory stores the specific number. A central processing unit deletes the specific number from the memory to perform the protection function in response to the input of the protection key. A printer prints a list from the memory to confirm whether performance of the protection function is completed.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: September 22, 1998
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Ki-Kwon Bae