Patents Assigned to LSI
  • Percuscopic access device and cleaning obturator
    Patent number: 9993265
    Abstract: A percuscopic access device is disclosed. The percuscopic access device has a hollow shaft with a proximal opening and a distal opening. The percuscopic access device also has one or more barrier ridges on the outside of the hollow shaft. The percuscopic access device also has one or more recesses on the inside of the hollow shaft and in communication with the distal opening. A cleaning obturator for use with the percuscopic access device is also disclosed. The cleaning obturator and percuscopic access device may be combined as a surgical apparatus. The cleaning obturator has a guide rod having a proximal end and a distal end. The cleaning obturator also has a plugging tip on the distal end. The cleaning obturator further has one or more swab guides proximal to the plugging tip.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: June 12, 2018
    Assignee: LSI Solutions, Inc.
    Inventors: Jude S. Sauer, Angelo John Martellaro
  • REACTIVE POWER COMPENSATION APPARATUS AND CONTROL METHOD THEREOF
    Publication number: 20180159328
    Abstract: A reactive power compensation apparatus includes one or more phase clusters each comprising a plurality of cells, and a controller controlling the one or more phase clusters. When at least one cell in a specific phase cluster among the one or more phase clusters is faulty, the controller controls a voltage of each cell in each of the remaining phase clusters except for the specific phase cluster to be controlled, using a modulation index.
    Type: Application
    Filed: September 11, 2017
    Publication date: June 7, 2018
    Applicant: LSIS CO., LTD.
    Inventors: Yong Ho CHUNG, Gum Tae SON
  • CHARGING DEVICE OF AIR CIRCUIT BREAKER
    Publication number: 20180158637
    Abstract: A first support member and a second support member are provided in a rotation support device and a worm gear is rotated in a state that the second support member is inserted in the first support member, whereby the worm gear is prevented from being shaken through the first support member and the second support member and heat transmission to a housing due to rotation of the worm gear to damage the housing is prevented.
    Type: Application
    Filed: July 7, 2017
    Publication date: June 7, 2018
    Applicant: LSIS CO., LTD.
    Inventors: Kyujung KIM, Seungpil YANG
  • AIR CIRCUIT BREAKER
    Publication number: 20180158629
    Abstract: The present invention relates to an air circuit breaker, in which a recess is formed on one side or each of both sides of each contact plate provided in an insulating cage so as to reduce a contact area between a movable contactor and the contact plate when the movable contactor and the contact plate are brought into contact with each other, thereby preventing a contact portion between the movable contactor and the contact plate from being melted due to heat generation.
    Type: Application
    Filed: June 7, 2017
    Publication date: June 7, 2018
    Applicant: LSIS CO., LTD.
    Inventor: Woojin PARK
  • Pre-charging circuit of inverter
    Patent number: 9991814
    Abstract: A pre-charging circuit of inverter is disclosed, the pre-charging circuit of inverter including a relay arranged between an output node of the rectifier and an input node of the DC-link capacitor, and a pre-charging resistor arranged between an output node of the rectifier and an input node of the inverter unit, whereby a degree of freedom for PCB design can be obtained.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: June 5, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Tae Suk Bae, Jae Moon Lee
  • Reactive power compensation apparatus and control method thereof
    Patent number: 9991712
    Abstract: A reactive power compensation apparatus includes one or more phase clusters each comprising a plurality of cells, and a controller controlling the one or more phase clusters. When at least one cell in a specific phase cluster among the one or more phase clusters is faulty, the controller controls a voltage of each cell in each of the remaining phase clusters except for the specific phase cluster to be controlled, using a modulation index.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: June 5, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Yong Ho Chung, Gum Tae Son
  • Monitoring system for energy storage system
    Patent number: 9991728
    Abstract: A monitoring system for an energy storage system is provided. The monitoring system for an energy storage system includes a power conversion system controlling charging and discharging of a battery; a charging control unit receiving data from the power conversion system and controlling the power conversion system; and a system control unit receiving data from the charging control unit and transmitting control data to the charging control unit, wherein the system control unit and the charging control unit transmit and receive data according to a priority if data traffic is equal to or higher than a certain level, and when the data traffic is the equal to or higher than the certain level, the charging control unit transmits data to the system control unit only if control data is not transmitted from the system control unit.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: June 5, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Choong Kun Cho
  • Current limiting device of circuit breaker
    Patent number: 9991077
    Abstract: In present disclosure, a movable bar guide portion is formed to protrude toward a movable bar in a shaft having a movable bar, and when a fault current is applied and the movable bar is rotated due to electromagnetic repulsion force, the movable bar and the movable bar guide portion contact each other, and thus, when the movable bar is rotated through the movable guide portion, movement of a rotation center of the movable bar is minimized.
    Type: Grant
    Filed: January 14, 2017
    Date of Patent: June 5, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jongmahn Sohn
  • Method for detecting ground fault in inverter including shunt resistors
    Patent number: 9983249
    Abstract: A method for detecting a ground fault in an inverter using leg-shunt resistors is provided. The method includes detecting output currents of three phases of the inverter, determining whether or not a voltage utilization of the inverter is not less than a preset allowable voltage level, and determining an occurrence or non-occurrence of the ground fault in the inverter.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: May 29, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Jaemoon Lee, Chunsuk Yang
  • Power compensation apparatus and method of controlling the same
    Patent number: 9979194
    Abstract: A power compensation apparatus compensates for power of a power system to be allowed to transmit from at least one or more power sources to a load. The power compensation apparatus includes a first system connected to the power system to compensate for active power and reactive power of the power system, a second system connected to the first system to store power necessary for compensating for active power and reactive power, and a third system connected to the second system to generate the power to be stored in the second system.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: May 22, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Eun Jae Lee
  • Communication system and operating method thereof
    Patent number: 9979673
    Abstract: A communication system is provided. The communication system includes a plurality of remote terminal units (RTUs) outputting a state signal. The communication system includes a communication device receiving the output state signal from each of the plurality of RTUs and generating signal quality information, which is quality information on the received state signal. The communication system includes a control device obtaining the signal quality information and the state signal, determining at least one RTU among the plurality of RTUs as a load according to a preset condition in response to the obtained signal quality information, and generating system analysis information on the plurality of RTUs, which includes the at least one RTU determined as the load, on the basis of the state signal.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: May 22, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Ae Kyoung Bae, Young In Kim, Hong Joo Kim, Yoon Sung Cho
  • Inverter
    Patent number: 9979333
    Abstract: The present disclosure relates to an inverter, and more specifically to an inverter that can be restarted stably by determining whether to restart it when power is supplied after a failure has occurred in the inverter due to a fault in the main supply.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: May 22, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Seung-Cheol Choi, Anno Yoo
  • SYNTHETIC TEST CIRCUIT FOR TESTING SUBMODULE PERFORMANCE IN POWER COMPENSATOR AND TEST METHOD THEREOF
    Publication number: 20180136281
    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: Application
    Filed: August 22, 2017
    Publication date: May 17, 2018
    Applicants: LSIS CO., LTD., Pukyong National University Industry-University Cooperation Foundation
    Inventors: Yong Ho CHUNG, Seung Taek BAEK, Young Woo KIM, Jin Hee LEE, Eui Cheol NHO, Jae Hun JUNG
  • Communications device supporting dynamic modbus protocol mapping
    Patent number: 9973598
    Abstract: Disclosed embodiments relate to a communications device that supports the Modbus protocol. In some embodiments, a device includes: a receiver to receive a transmit packet; a data packet extractor configured to extract a data packet from the transmit packet; a data packet analyzer configured to acquire a command indicated by the data packet based on a Modbus map that associates data included in the data packet with a handler function included in the communications device; and an action performer configured to carry out the acquired command.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jae-Hwan Lim
  • Method for checking IP address collision of ethernet communication module of PLC
    Patent number: 9973428
    Abstract: A method for checking an IP address collision is provided. The method includes: transmitting an ARP (Access Resolution Protocol) request message by setting an IP address of the PLC Ethernet communication module as a destination; receiving an ARP reply message responding to the ARP request message; determining whether an MAC (Media Access Control) address included in the ARP reply message is identical to an MAC address of the PLC Ethernet communication module; and determining that an IP address collision occurs, when the MAC (Media Access Control) address included in the ARP reply message is not identical to the MAC address of the PLC Ethernet communication module.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Hyung Lae Kim
  • Multiple-tuned filter design method for HVDC system
    Patent number: 9973003
    Abstract: A method of designing a multiple-tuned filter (MTF) of a high voltage direct current (HVDC) system is provided. The method includes selecting an input parameter for the MTF, setting a resonance frequency of the MTF, calculating values of inductance (L) and capacitance (C) which are filter parameters of the MTF on the basis of the input parameter and the resonance frequency, combining a value of resistance (R) with the filter parameters and calculating a price according to the combination, and storing the combined values of R, L, and C when the calculated price falls within a predetermined price range.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Yi Kyung Chyun
  • Draw in and out type circuit breaker
    Patent number: 9972458
    Abstract: Disclosed is a draw in and out type circuit breaker. In the draw in and out type circuit breaker, at least one guide slot is provided in a slide plate, and thus, a clip moves to a test position, a connected position, or a disconnected position with being fitted into the at least one guide slot, thereby enabling a position of the clip to be easily controlled.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Sangchul Lee
  • Data management apparatus and method of energy management system
    Patent number: 9971780
    Abstract: A data management apparatus is provided. In the data management apparatus, a real-time database stores data collected from a power system; a power system data recording (PSDR) server reads and stores data stored in the real time database and creates policy data and a data file on the basis of the stored data and a PSDR history file storage unit backs up data processed by the PSDR server.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Yeo Chang Yoon
  • Vacuum interrupter for a vacuum circuit breaker
    Patent number: 9972466
    Abstract: A vacuum interrupter for a vacuum circuit breaker is disclosed, in which a center shield is arranged between an upper insulating envelope and a lower insulating envelope, whereby the center shield is not provided inside each of the insulating envelopes and thus outer diameters of the respective insulating envelopes are reduced.
    Type: Grant
    Filed: January 21, 2017
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jaeseop Ryu
  • Wall sconce
    Patent number: D818176
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: May 15, 2018
    Assignee: LSI Industries, Inc.
    Inventors: Edward R. McCracken, Jonathan M. Hermansen