Patents Assigned to LSIS Co., Ltd.
  • Molded-case circuit breaker for DC
    Patent number: 10483065
    Abstract: The present invention relates to a molded-case circuit breaker for direct current (DC), and more particularly, to a molded-case circuit breaker for DC that contains an internal connecting conductor connecting adjacent terminals to improve insulation performance and assemblability and reduce occupied space. There is provided a molded-case circuit breaker for DC that contains a plurality of interruption units within an outer casing, the DC circuit breaker including a two-unit connecting heater that connects fixed contacts of adjacent interruption units, the two-unit connecting heater being placed within the outer casing.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: November 19, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Kihwan Oh
  • Remote supervisory control system
    Patent number: 10474176
    Abstract: According to some embodiments, a remote supervisory control system includes an electric generator configured to operate based on a driving value applied from a server, and the server configured to apply a representative driving value for an driving of the electric generator to the electric generator, receive a driving feedback signal applied from the electric generator according to the representative driving value, determine whether or not the representative driving value is normal, and update the representative driving value with a second priority driving value according to the determination result.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: November 12, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Jong-Ho Park, Yong-Ik Lee, Ho-Young Whang
  • Analog signal detecting circuit for processing an analog signal for monitoring by discriminating the normal signal from noise
    Patent number: 10466279
    Abstract: The analog signal detecting circuit comprises a reference voltage generator that outputs a plurality of reference voltages, the number of the reference voltages being varied depending on a voltage width between a minimum voltage value and a maximum voltage value of an analog signal; a plurality of comparators that compares a voltage of the analog signal with each of the plurality of reference voltages output from the reference voltage generator; a plurality of pulse generators that outputs a plurality of pulse signals having widths among the plurality of pulse signals varied depending on a frequency of the analog signal; and a combiner circuit section that outputs the pulse signals from the plurality of pulse generators by summing up.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 5, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jongkug Seon
  • Parameter determining apparatus for estimating temperature of switching element of inverter
    Patent number: 10466114
    Abstract: A parameter determining apparatus for estimating temperature of a switching element of an inverter is disclosed. The parameter determining apparatus of the present disclosure includes an inverter unit including a power semiconductor module configured with at least one or more switching elements, and a control unit configured to determine an initial collector-emitter voltage of each of the switching elements and collector-emitter resistance of each thereof by linearizing a collector-emitter voltage of each of the switching elements at a certain temperature.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 5, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jin-Kyu Yang
  • Distribution panel
    Patent number: 10468861
    Abstract: Provided is a distribution panel. The distribution panel includes a main busbar compartment in which a main busbar is provided and which is provided as an independent space and an arc duct provided at a rear side of the main busbar compartment to discharge an arc generated in the main busbar compartment. The main busbar compartment includes a communication hole defied in one surface of the main busbar to allow the main busbar compartment to communicate with the arc duct and a relief device rotatably provided on one side of the communication hole to open or close the communication hole. The relief device is bendable in multi stages. Thus, the arc may be effectively discharged while reducing a size of the distribution panel.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: November 5, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Seog Won Lee, Ji Hoon Ma, Jong Doo Kim, Seung Hwan Mun
  • Simulation apparatus and operating method thereof
    Patent number: 10467358
    Abstract: A simulation apparatus includes a database configured to a set line parameter for a system line configuring a power system; a parameter error detector configured to compare surveyed data measured in the system line and the line parameter to detect error of the line parameter; a system analysis simulator configured to perform a system analysis simulation based on the surveyed data and the line parameter; and a monitor configured to display an error detection result of the line parameter from the parameter error detector and a system analysis simulation result performed in the system analysis simulator.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: November 5, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Myung Hwan Lee, Young In Kim, Hong Joo Kim, Chong Suk Song
  • Power system monitoring and control system
    Patent number: 10466761
    Abstract: A system for monitoring a power system and controlling an operation is provided. The system includes: a process setting unit receiving a process modeling file from a user and setting, as a process setting model, a process modeling file on which process verification is completed; a process verification unit performing the verification of preset process modeling items on the process modeling files received from the user; and a data storage unit storing file information for the operation of a system, the process modeling file, process modeling verification results, and the process setting file.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: November 5, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jong Kab Kwak
  • Circuit breakers
    Patent number: 10460898
    Abstract: Provided is a circuit breaker including a single pole breaking unit with a pressure trip device that rotates a trip bar through an arc gas and an opening/closing mechanism unit adjusted to be in a trip state as the trip bar rotates through the pressure trip device. The pressure trip device includes: a first case connected to the single pole breaking unit and having an arc gas discharge hole; a barrier positioned in the front of the arc gas discharge hole and bent through an arc gas discharged through the arc gas discharge hole; a shooter seated on the first case and configured to drive the trip bar while moving through the arc gas discharged through the arc gas discharge hole; and a second case connected to cover the first case.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 29, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Sunkook Kim
  • Magnetic trip device for circuit breaker
    Patent number: 10460897
    Abstract: The present disclosure relates to a magnetic trip device for a circuit breaker capable of maintaining fault information indication until a user removes the cause of an accident subsequent to a trip operation and resets the magnetic trip device. The device comprises an actuator coil part having a plunger; an output plate; a micro switch outputting an electrical signal indicating a state of the circuit breaker; a switch driving lever mechanism rotating to press and releasing the micro switch; a driving lever bias spring elastically biasing the switch driving lever mechanism to rotate; an automatic reset mechanism pressing the plunger to a retracted position; and a driving lever latch rotating to a restraining position for preventing the switch driving lever mechanism from rotating to a first position, and a release position allowing the switch driving lever mechanism-to rotate to the first position.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: October 29, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Kyuho Lee
  • Modular distributing panel including a transformer
    Patent number: 10461510
    Abstract: The present disclosure may include a base frame; a transformer panel module having a main frame and a transformer disposed at an upper side of the base frame; a high voltage panel module having a high voltage enclosure coupled to one side of the main frame and a high voltage switch mounted within the high voltage enclosure; and a low voltage panel module having a low voltage enclosure coupled to the other side of the main frame and at least one of a breaker and a fuse mounted within the low voltage enclosure, thereby having an advantage of facilitating a service work for maintenance on the transformer panel module, high voltage panel module and low voltage panel module as well as minimizing a service time.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: October 29, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jaegul Lee
  • Direct current air circuit breaker
    Patent number: 10453637
    Abstract: A direct-current (DC) air circuit breaker for opening and closing a circuit according to various embodiments includes a circuit unit having a main circuit, a detecting unit having a detection circuit for detecting a fault current in the main circuit, and a circuit operating device configured to allow connection or isolation between the main circuit and the detection circuit.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: October 22, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Seungpil Yang, Sangchul Lee, Youngkook Kim, Ilhyun Kim
  • Slave device control method
    Patent number: 10447782
    Abstract: The present disclosure relates a slave device control method including generating the control message including a plurality of input data and transmitting the control message to a specific slave device among a plurality of slave devices, by a master device, extracting input data from a received data start position of the control message, by the specific slave device, and padding output data to transmitted data storage position of the control message and transmitting the output data to a next slave device, by the specific slave device.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 15, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Sung-Han Lee
  • Current circuit breaker
    Patent number: 10447024
    Abstract: Disclosed herein is a current circuit breaker that protects a semiconductor module by using fast switches to block a current. The current circuit breaker includes: a first switch configured to be opened upon a fault current being generated; a second switch connected to the first switch and configured to be opened after a predetermined period of time elapses since the first switch has been opened; a semiconductor module having an end connected to the first switch and another end connected to the second switch; a capacitor having a terminal connected to the second switch and the other terminal connected to the semiconductor module; and a surge arrester connected across the capacitor and configured to change its resistance according to a voltage across the capacitor to block the fault current.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: October 15, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jung-Wook Sim
  • Method of optimally compiling PLC command
    Patent number: 10445074
    Abstract: Disclosed embodiments include a system and a method of compiling a PLC (Programmable Logic Controller) command. In some embodiments, the method includes: determining one compile processing scheme chosen from a plurality of compile processing schemes for a command included in a program to be executed in a PLC; and executing a command compile or compiler optimized for a rate or a size based on the chosen compile processing scheme.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: October 15, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Chang-Woo Park
  • Communication system and operating method thereof
    Patent number: 10444736
    Abstract: A communication system is provided. The communication system includes a communication device receiving a state signal from at least one remote terminal unit (RTU), generating signal quality data for the state signal, and transmitting, to a control device, the generated signal quality data and the received state signal. The control device generates state estimation data for each of the at least one RTU on a basis of the state signal received from the communication device, corrects the signal quality data transmitted from the communication device according to at least one preset condition, and changes the generated state estimation data on a basis of the corrected signal quality data and the received state signal.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: October 15, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Young In Kim, Ae Kyoung Bae, Hong Joo Kim, Yoon Sung Cho
  • Diagnostic apparatus for switchgear
    Patent number: 10444284
    Abstract: The invention relates to reliable diagnostic apparatus for a switchgear which may minimize the probability of failure in diagnosing a deterioration of a switchgear. The diagnostic apparatus for a switchgear comprises a VHF sensor detecting an electromagnetic wave signal of a VHF band, which is generated by the switchgear; a UHF sensor detecting an electromagnetic wave signal of a UHF band, which is generated by the switchgear; a data acquisition unit that acquires the electromagnetic wave signals detected by the VHF sensor and the UHF sensor, and converts the electromagnetic wave signals into data indicating magnitudes of the electromagnetic wave signals; and a diagnosis unit connected with the data acquisition unit and that executes analysis including whether the data provided by the data acquisition unit is a pattern of a partial discharge signal and stores the analyzed result.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: October 15, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Jinho Lee, Hyunho Kwon, Changhwan Jin
  • Synthetic test circuit for testing submodule performance in power compensator and test method thereof
    Patent number: 10436844
    Abstract: A synthetic test circuit for testing a submodule performance in a power compensator includes a submodule test unit which is an object of testing the submodule performance, a current source and a controller. The current source is connected to the submodule test unit to supply a voltage to the submodule test unit such that a charging voltage having a capacity set in the submodule test unit is stored in order to operate the submodule test unit. The controller is configured to perform control to perform a submodule performance test of the submodule test unit using the stored charging voltage.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: October 8, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Yong Ho Chung, Seung Taek Baek, Young Woo Kim, Jin Hee Lee, Eui Cheol Nho, Jae Hun Jung
  • Magnetic trip device of air circuit breaker
    Patent number: 10438763
    Abstract: Disclosed herein is a magnetic trip device. The magnetic trip device maintains a failure state indication through a latch, a lever, and a trip bar which are provided in the magnetic trip device and thus a switching part can be operated or maintained with a more simplified structure.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 8, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Kyu-Ho Lee
  • Apparatus and method for managing of database in energy management system
    Patent number: 10437792
    Abstract: Disclosed embodiments relate to apparatuses and methods for managing data in an energy management system. In some embodiments, an apparatus includes: a control unit configured to process data collected from a power system and create a database; and a state transfer unit configured to receive state information of the database from the control unit and offer the received state information to a client.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: October 8, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Jong-Kab Kwak, Jong-Ho Park, Young-Ik Lee
  • Apparatus and method for estimating initial position of rotor of motor
    Patent number: 10439536
    Abstract: An initial position estimating apparatus for estimating an initial position of a rotor of a motor includes: a signal processor for outputting an angular error component from a change amount of a q-axis current in an estimated rotor reference frame; a position estimator for estimating an electrical position of the rotor from the angular error component; a magnetic pole determination portion for outputting magnetic pole determination information according to a sign of a magnetic pole determination signal determined based on a change amount of a d-axis current in the estimated rotor reference frame and based on a d-axis voltage; and a first addition portion for outputting an initial position of the rotor by adding the magnetic pole determination information to the electrical position.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: October 8, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Hakjun Lee