Patents Assigned to LSI
  • Direct current circuit breaker and method using the same
    Patent number: 10063046
    Abstract: Some embodiments of the present disclosure relate to a direct current circuit breaker capable of shortening a cut-off operation time and reducing a magnitude of a required reverse current. The direct current circuit breaker includes: a main circuit line which is connected between a power supply and a load, the main circuit line includes a main breaker and a first diode connected in parallel; a charging circuit line which is disposed in the rear stage of the main breaker and is connected in parallel to the load, the charging circuit line includes a first capacitor, a reactor and a second diode connected in series; and a switch line including one end connected in parallel to the front stage of the main breaker and the other end connected between the reactor and the second diode, the switch line includes a third diode and a current switch connected in series.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: August 28, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Gyeong-Ho Lee, Jung-Wook Sim, Chae-Yoon Bae, Hae-Yong Park
  • Method for controlling operation of an elevator using an auxiliary power supply
    Patent number: 10053330
    Abstract: The present invention relates to a method for controlling an operation of an elevator, which is capable of moving the elevator to a near floor by using an auxiliary power supply such as a battery in an emergency situation where a commercial power supply cannot be used, while minimizing power consumption through automatic control. The method includes: detecting the current operation zone of the elevator when an auxiliary power supply driving situation occurs; and operating the elevator by using the auxiliary power supply to correspond to the detected current operation zone. The detected current operation zone corresponds to one of an acceleration zone, a constant speed zone, a creep zone and a seating zone.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: August 21, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Ju-Beom Son
  • Power system monitoring and control system having thread-dependent calculation monitoring function
    Patent number: 10054996
    Abstract: A power system monitoring and control system having a thread-dependent calculation monitoring function is provided. The power system monitoring and control system includes: a display unit displaying screen information; a calculation handling unit executing thread-dependent calculation based on a calculation expression defined in a calculation file, and performing calculation handling for generating calculation result information and thread-dependent calculation execution monitoring information to provide generated information as screen information on the display unit; and a data storage unit storing file information for power system monitoring and control, information on the calculation file, the calculation result information, and the thread-dependent calculation execution monitoring information.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: August 21, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Tae Seop Kim, Jong Ho Park, Yong Ik Lee, Tae Ho Kim, Jin Hei Myung, Soon Jong Bahng, Jong Kab Kwak
  • Control apparatus and method in static VAR compensator system
    Patent number: 10056825
    Abstract: A control apparatus in a static VAR compensator (SVC) system includes a plurality of current supply units for supplying phase currents configuring three-phase current of a power system, a plurality of current sensors for measuring the phase currents, and a controller for determining whether unbalance occurs in the three-phase current based on the phase currents, calculating an error corresponding to the unbalance according to the phase currents if unbalance occurs, and individually controlling at least one of the plurality of current supply units so as to compensate for the error.
    Type: Grant
    Filed: January 21, 2017
    Date of Patent: August 21, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Ho Seok Choi
  • Apparatus and method for insulation design of high voltage direct current transmission system
    Patent number: 10056846
    Abstract: Provided is an apparatus for an insulation design. The apparatus for the insulation design, which performs the insulation design of a high voltage direct current (HVDC) transmission system includes a contingency state voltage calculation unit, a case analysis performance unit, and a rated insulation level calculation unit.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: August 21, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Yong Kil Choi
  • Data transmission and reception system
    Patent number: 10049065
    Abstract: A communication system is provided. The communication system includes slave modules outputting collected data to a master module, and outputting data priority processing request information to the master module; and the master module connected to slave modules, collecting data from the slave modules, and processing, by priority, data from a corresponding slave module based on the data priority processing request information received from at least one slave module.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: August 14, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Sung Sik Ham
  • Method for controlling inverter system
    Patent number: 10044292
    Abstract: The present invention relates to a method for controlling an inverter system including a plurality of inverters connected in parallel. The method includes: comparing a target power amount with an amount of power to be supplied by the predetermined number of inverters; determining the number of inverters to be driven, based on a result of the comparison; and supplying the final output power to an AC power system by driving inverters by the determined number of inverters.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Ho-Hyun Kang
  • Method of automatically setting protocol in programmable logic controller system
    Patent number: 10044838
    Abstract: In some embodiments, a method of automatically setting a protocol is performed in a protocol automatic setting server communicating with a client in a Programmable Logic Controller (PLC) system. The method can include receiving a request frame from a client; analyzing a protocol of the request frame based on a protocol stack and determining a response frame corresponding to the request frame according to an analysis result; and transmitting the response frame to the client. The server can automatically analyze a request frame from the client based on the protocol stack, and thus conventional protocol presetting can be eliminated.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Ki-Myung Kim, Geon Yoon
  • Gas-insulated switch gear using dual motion with multi-lever
    Patent number: 10043622
    Abstract: The present disclosure may allow the movable base and the second movable contact driven in a dual-motion manner to be connected by a plurality of levers, and a force transferred to the movable base while the plurality of levers are in close contact with one another or released from the close contact may be transferred to the second movable contact, and thus a size of the levers may not be required to increase even when a stroke ratio between the movable base and the second movable contact increases, thereby having an effect capable of minimizing a size of the gas circuit breaker as well as appropriately controlling a stroke ratio between the movable base and the second movable contact.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jingun Park
  • Power supply apparatus
    Patent number: 10044219
    Abstract: Disclosed herein are embodiments of a power supply apparatus. In some embodiments, the power supply apparatus supplies power to a load including a programmable logic controller (PLC) and includes: a first power storing module comprising a first auxiliary power source; and a second power storing module including a second auxiliary power source. An output voltage from the second power storing module may be larger than an output voltage from the first power storing module. It is possible to prevent an accident such as memory data loss possibly occurring in the event of sudden power-off by way of reducing usage of a battery that has limited lifetime while utilizing the advantage of super capacitor that has a very high number of charge/discharge cycles.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jung-Bin Na
  • Apparatus and method for managing of study mode in energy management system
    Patent number: 10044222
    Abstract: Disclosed embodiments relate to an apparatus for managing a study mode in an energy management system. In some embodiments, the apparatus includes: a control unit configured to process data collected from a power system and operate an energy management system; a study file creator configured to create a study file based on data being currently operated in the control unit; and a study control unit configured to copy the study file and create a study database for study mode execution.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Jong-Kab Kwak, Jong-Ho Park, Yong-Ik Lee
  • Communication device and communication method
    Patent number: 10044469
    Abstract: A first communication device calculates a data error detection code for detecting an error in data by using the data and a virtual sequence number, and generates a packet comprising the data and the data error detection code. The packet does not include the virtual sequence number which is used for calculating error detection. The first communication device transmits the packet to a second communication device.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Sung Han Lee, Dae Hyun Kwon, Joon Seok Oh
  • Method of debugging PLC by using general-purpose microprocessor
    Patent number: 10041998
    Abstract: Disclosed embodiments include a method of using a general-purpose microprocessor to debug a programmable logic controller. In some embodiments, the method includes: at a MPU of the PLC, backing up identification information and file information of an interrupt step of steps comprised in a user's program and substituting the interrupt step with an exceptional interrupt code to set the interrupt step for the debugging; and at the MPU of the PLC, interrupting the driving of the PLC at a step including the exceptional interrupt code in executing the user's program step by step while driving the PLC.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: August 7, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Kang-Hee Park
  • AUXILIARY RELAY OF ELECTROMAGNETIC CONTACTOR
    Publication number: 20180218863
    Abstract: The present invention relates to an auxiliary relay for an electromagnetic contactor, the relay including magnet members provided on both sides of a moving member, and first and second conductive members provided on both sides of a frame, whereby an ON or OFF state of the first and second conductive members can be controlled according to the magnet members, in response to a movement of the moving member, so as to configure various contact circuits, such as 1a 1b contact circuit, 2a contact circuit, 2b contact circuit and the like, for the electromagnetic contactor.
    Type: Application
    Filed: July 13, 2017
    Publication date: August 2, 2018
    Applicant: LSIS CO., LTD.
    Inventor: Koanho CHOI
  • GAS-INSULATED SWITCH GEAR USING DUAL MOTION WITH MULTI-LEVER
    Publication number: 20180211802
    Abstract: The present disclosure may allow the movable base and the second movable contact driven in a dual-motion manner to be connected by a plurality of levers, and a force transferred to the movable base while the plurality of levers are in close contact with one another or released from the close contact may be transferred to the second movable contact, and thus a size of the levers may not be required to increase even when a stroke ratio between the movable base and the second movable contact increases, thereby having an effect capable of minimizing a size of the gas circuit breaker as well as appropriately controlling a stroke ratio between the movable base and the second movable contact.
    Type: Application
    Filed: March 30, 2017
    Publication date: July 26, 2018
    Applicant: LSIS CO., LTD.
    Inventor: Jingun PARK
  • Control device for voltage source converter and operating method thereof
    Patent number: 10030632
    Abstract: A control device for a voltage source converter connected to a wind farm is provided. The control device includes: a power source monitor unit sensing a direct current (DC) voltage of a whole grid connected to the voltage source converter; and a control unit comparing the DC voltage of the whole grid sensed with a reference voltage, wherein the control unit adjusts an alternating current (AC) supplying to the wind farm to a setting when as a result of comparison, the DC voltage of the whole grid sensed is out of a preset range of reference voltages.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: July 24, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Gum Tae Son
  • Direct current relay
    Patent number: 10032587
    Abstract: In some embodiments, a DC relay includes a pair of fixed contacts fixedly installed on one side of a frame, a movable contact movably installed below the pair of fixed contacts and brought into contact with the pair of fixed contacts or separated therefrom, an insulating plate installed below the movable contact, a contact spring provided between the movable contact and the insulating plate, a plate installed below the insulating plate and including a through hole formed in a central portion thereof, a fixed core inserted from above the plate through the through hole and including a shaft hole formed at the center thereof, an anti-noise pad provided between the fixed core and the insulating plate, a movable core installed to be linearly movable below the fixed core, and a shaft installed to penetrate through the through hole.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: July 24, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Junhyuk Yang
  • REACTIVE POWER COMPENSATOR AND METHOD OF CONTROLLING THE SAME
    Publication number: 20180205228
    Abstract: A reactive power compensator includes a plurality of phase clusters each including a plurality of cells, and a controller configured to control the plurality of phase clusters. When an energy error is generated in each of the plurality of phase clusters, the controller performs control to compensate for the energy error by generating an offset signal having a zero sequence component based on an error energy value of each of the plurality of phase clusters.
    Type: Application
    Filed: June 7, 2017
    Publication date: July 19, 2018
    Applicants: LSIS CO., LTD., Seoul National University R&DB FOUNDATION
    Inventors: Yong Ho CHUNG, Gum Tae SON, Seung Ki SUL, Jae Jung JUNG, Joon Hee LEE
  • Method for providing user authority certification service
    Patent number: 10027653
    Abstract: Embodiments of a method for providing user authority information management service are provided. In some embodiments, the method includes a client server sending a request for authority information to an authority service server, the client server receiving the authority information from the authority service server and comparing the received authority information with authority information maintained in a client server memory, determining whether or not to download the authority information based on a result of the comparison between the received authority information and the maintained authority information, updating the client server memory according to whether the authority information is downloaded, and the client server performing user authority certification for each process operation to be performed by the client server.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: July 17, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Tae-Ho Kim
  • Tripping device of circuit breaker
    Patent number: 10026573
    Abstract: A tripping device of a circuit breaker of the present disclosure may reinforce a magnetic force on a main magnetic flux path using a plurality of magnetic force reinforcing plates without using an additional plate yoke on an actuator provided in the circuit breaker to miniaturize the size of the actuator, thereby having an effect of allowing a control circuit unit provided at an outer portion of the circuit breaker to be installed at an inner portion of the circuit breaker to miniaturize the whole size of the circuit breaker.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: July 17, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Sung Rok Yoo, Jong Mahn Sohn