Patents by Inventor Sung-Hun Lim

Sung-Hun Lim 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: 11018501
    Abstract: A directional overcurrent relay using a superconducting fault current limiter voltage as a relay element includes: a current measuring circuit measuring a current of a line connected from a system power source to a load, a voltage measuring circuit measuring a voltage at both ends of a superconducting fault current limiter connected to the line, and a correcting circuit correcting a tripping time Ttrip by using a fault current If that is the current of the line and a superconducting fault current limiter voltage VSFCL that is the voltage at both ends of the superconducting fault current limiter and the tripping time Ttrip is maintained consistently regardless of whether the superconducting fault current limiter operates or not.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: May 25, 2021
    Assignee: Foundation of Soongsil University-Industry Cooperation
    Inventors: Sung Hun Lim, Seung Taek Lim
  • Publication number: 20200014198
    Abstract: Provided is a directional overcurrent relay using a superconducting fault current limiter voltage as a relay element, and a method for correcting the same. The directional overcurrent relay using a superconducting fault current limiter voltage as a relay element includes: a current measuring circuit measuring a current of a line connected from a system power source to a load, a voltage measuring circuit measuring a voltage at both ends of a superconducting fault current limiter connected to the line, and a correcting circuit correcting a tripping time Ttrip by using a fault current If that is the current of the line and a superconducting fault current limiter voltage VSFCL that is the voltage at both ends of the superconducting fault current limiter and the tripping time Ttrip is maintained consistently regardless of whether the superconducting fault current limiter operates or not.
    Type: Application
    Filed: November 23, 2018
    Publication date: January 9, 2020
    Inventors: Sung Hun Lim, Seung Taek Lim
  • Patent number: 9866013
    Abstract: A current limiting device is provided. To elaborate, the device may include: a first current limiting unit configured to limit an electric current equal to or higher than a first threshold value applied thereto; a second current limiting unit configured to limit an electric current equal to or higher than a second threshold value applied thereto; and a passive element unit connected to both ends of the first current limiting unit, and including a first passive element and a second passive element connected in series.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: January 9, 2018
    Assignee: SOONGSIL UNIVERSITY RESEARCH CONSORTIUM TECHNO-PARK
    Inventors: Sung Hun Lim, Jae Chul Kim, Jin Seok Kim
  • Publication number: 20160308351
    Abstract: A current limiting device is provided. To elaborate, the device may include: a first current limiting unit configured to limit an electric current equal to or higher than a first threshold value applied thereto; a second current limiting unit configured to limit an electric current equal to or higher than a second threshold value applied thereto; and a passive element unit connected to both ends of the first current limiting unit, and including a first passive element and a second passive element connected in series.
    Type: Application
    Filed: May 20, 2014
    Publication date: October 20, 2016
    Inventors: Sung Hun Lim, Jae Chul Kim, Jin Seok Kim
  • Patent number: 8810978
    Abstract: Disclosed herein is a Superconducting Fault Current Limiter (SFCL) for suppressing a bus voltage drop in an electric power system. A primary winding, a secondary winding, and a tertiary winding are wound around an identical iron core, and a superconductor is connected to any one of the primary winding and the secondary winding. A first switch is connected to any one of the primary winding and the secondary winding and is configured to be opened so as to separate a faulty section when a fault current is generated and to be shorted when the fault current is eliminated. A second switch is connected in series to the tertiary winding and is configured to be shorted so as to stably supply power when the fault current is generated and to be opened when the fault current is eliminated.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: August 19, 2014
    Assignee: Foundation of Soongsil University-Industry Cooperation
    Inventors: Sung-Hun Lim, Jae-Chul Kim, Il-Kyoung You, Jin-Seok Kim, Myoung-Hoo Kim
  • Publication number: 20120327538
    Abstract: Disclosed herein is a Superconducting Fault Current Limiter (SFCL) for suppressing a bus voltage drop in an electric power system. A primary winding, a secondary winding, and a tertiary winding are wound around an identical iron core, and a superconductor is connected to any one of the primary winding and the secondary winding. A first switch is connected to any one of the primary winding and the secondary winding and is configured to be opened so as to separate a faulty section when a fault current is generated and to be shorted when the fault current is eliminated. A second switch is connected in series to the tertiary winding and is configured to be shorted so as to stably supply power when the fault current is generated and to be opened when the fault current is eliminated.
    Type: Application
    Filed: October 22, 2010
    Publication date: December 27, 2012
    Applicant: FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION
    Inventors: Sung-Hun Lim, Jae-Chul Kim, Il-Kyoung You, Jin-Seok Kim, Myoung-Hoo Kim
  • Publication number: 20110234161
    Abstract: The present disclosure includes an adapter and associated method of use for mobile unit (MU) charging and communication that enables multiple connector types to be utilized with a single charger or charging station. The adapter enables standardization of a connector scheme on newer MUs while maintaining compatibility with current or older MU devices. Specifically, the adapter resides between the MU and a charging device or station. The adapter may include various connector features mimicking connectors of various different MUs, thus allowing it to interface with a device of a different connector design. Advantageously, the adapter enables enterprises to deploy various cradles throughout facilities and achieves universal connections for a plurality of different MUs. In an exemplary embodiment, the adapter provides connectivity between various MUs and their associated cradles and a hook and pivoting latching system.
    Type: Application
    Filed: March 23, 2010
    Publication date: September 29, 2011
    Applicant: Symbol Technologies, Inc.
    Inventors: Ian Jenkins, Sung Hun Lim, Wen-Tsia Liu, Richard Martin
  • Patent number: 7679867
    Abstract: A magnetic flux coupling-type superconducting current limiter is capable of protecting lines more effectively by winding reactors of a primary coil and a secondary coil in series in the structure where the primary coil and the secondary coils are wound in parallel in the conventional magnetic flux-lock type current limiter to increase a linked flux generated from an iron core. An electric conducting current which rapidly increases when a fault occurs is divided into the secondary coil and a superconducting coil to decrease a load on the superconducting element and it is opened more rapidly than the existing superconducting current limiter during a quench time such that it better limits a fault current.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: March 16, 2010
    Assignee: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Hyo-Sang Choi, Hyoung-Min Park, Yong-Sun Cho, Gueng-Hyun Nam, Na-Young Lee, Tae-Hee Han, Sung-Hun Lim, Dong-Chul Chung
  • Publication number: 20070257755
    Abstract: A magnetic flux coupling-type superconducting current limiter is capable of protecting lines more effectively by winding reactors of a primary coil and a secondary coil in series in the structure where the primary coil and the secondary coils are wound in parallel in the conventional magnetic flux-lock type current limiter to increase a linked flux generated from an iron core. An electric conducting current which rapidly increases when a fault occurs is divided into the secondary coil and a superconducting coil to decrease a load on the superconducting element and it is opened more rapidly than the existing superconducting current limiter during a quench time such that it better limits a fault current.
    Type: Application
    Filed: March 30, 2007
    Publication date: November 8, 2007
    Applicant: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Hyo-Sang CHOI, Hyoung-Min PARK, Yong-Sun CHO, Gueng-Hyun NAM, Na-Young LEE, Tae-Hee HAN, Sung-Hun LIM, Dong-Chul CHUNG
  • Patent number: PP12043
    Abstract: A new and distinct variety of peach ‘Prunus persica’ tree with the following combination of unique features that are desirable in a new variety. 1. Heavy and rugular production of fruit. 2. Production of very firm, white flesh fruit with good handling and shipping quality. 3. Fruit that will stay firm on the tree 15 to 17 days after maturity (shipping ripe). 4. Fruit with excellent flavor and eating quality. 5. Early season maturity of white flesh fruit. 6. Fruit with an attractive red skin. 7. Vigorous half-open growth.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: August 7, 2001
    Inventors: Jung-Kyoung Lim, Sung-Hun Lim