Patents Assigned to LSI
  • 3-WAY DISCONNECTOR AND EARTH SWITCH FOR GAS INSULATED SWITCHGEAR
    Publication number: 20180197709
    Abstract: The 3-way disconnector and an earth switch for a gas insulated switchgear includes: a movable portion including a disconnector movable portion and an earth switch movable portion; a disconnector mover and an earth switch mover installed in the disconnector movable portion and the earth switch movable portion so as to be linearly movable; a driving lever rotatably installed between the disconnector mover and the earth switch mover; and a first lever and a second lever rotated by receiving a rotational force of the driving lever, and configured to move the disconnector mover and the earth switch mover, respectively, wherein a driver is protruded at one side of the driving lever, and a driving pin is provided at an end of the driver, and wherein the driving pin is configured to selectively move one of the first and second levers.
    Type: Application
    Filed: March 17, 2017
    Publication date: July 12, 2018
    Applicant: LSIS CO., LTD.
    Inventor: Ruiqiang LIU
  • Structure of switchgear with arc eliminator
    Patent number: 10020643
    Abstract: The present invention relates to a structure of a switchgear with an arc protection system including an arc optical sensor to detect an arc, a relay to determine an occurrence or non-occurrence of a fault current by receiving an arc signal detected by the arc optical sensor, and an arc eliminator to earth an arc-generated side bus bar in response to an operating signal with respect to the determined fault current, wherein the arc eliminator has a test position or a service position within the switchgear.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: July 10, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Menglei Zheng
  • Structure of contacts for air circuit breaker
    Patent number: 10020128
    Abstract: The present invention relates to a structure of contacts for an air circuit breaker, in which a movable contact arm can be stably brought into contact with a fixed contact arm by changing an applying direction of an electromagnetic repulsive force generated between a movable contact and a fixed contact, and, to this end, the structure, which includes the fixed contact arm having the fixed contact, and the movable contact arm having the movable contact and rotatably installed to be brought into contact with or separated from the fixed contact arm, is configured such that the fixed contact and the movable contact have contact surfaces, respectively, disposed in an inclined manner, and a line commonly passing the contact surfaces of the fixed contact and the movable contact forms an acute angle with respect to a line passing through a center of a longitudinal axis of the movable contact arm.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: July 10, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Woojin Park
  • Surgical rib retractor and methods thereof
    Patent number: 10016189
    Abstract: A surgical rib refractor is disclosed. The surgical rib retractor includes a housing having at least one cam surface. The surgical rib retractor also includes an anterior arm unit configured to receive one rib. The surgical rib retractor further includes a posterior arm unit configured to receive another rib. The surgical rib retractor also has an actuator movable relative to the housing and operationally coupled to at least one of the anterior and posterior arm units to move said at least one of the anterior and posterior arm units against the at least one cam surface to create a relative movement between the anterior and posterior arm units, said relative movement comprising at least two directional components.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: July 10, 2018
    Assignee: LSI Solutions, Inc.
    Inventor: Jude S. Sauer
  • Apparatus for detecting malfunction of relay
    Patent number: 10020648
    Abstract: The present disclosure relates to an apparatus for detecting malfunction of a relay, which includes a temperature determination unit configured to determine whether or not a relay resistor is overheated based on a resistance temperature of the relay resistor being connected to a relay; a charging voltage determination unit configured to determine whether or not a variation value of a charging voltage of a direct current (DC) link capacitor according to an operation start of an inverter system exceeds a reference variation value; and a relay malfunction determination unit configured to determine whether or not the relay is malfunctioned based on one or more the determination results whether or not the relay resistor is overheated and whether or not the variation value exceeds the reference variation value.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: July 10, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jong-Chan Kim
  • PLC system providing a web based service
    Patent number: 10012972
    Abstract: A programmable logic controller (PLC) system is provided. The programmable logic controller (PLC) system includes a storage unit storing a user program; a main control unit performing a scan operation based on the user program, measuring a scan time required for the scan time, and determining whether there is a need to process a web based service; and a web based service control unit processing the service data based on the scan time service request details, and service data that are transmitted from the main control unit, according to a result of the determination on whether there is a need to process the web based service.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: July 3, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Seung Shin Han
  • Method for controlling inverter
    Patent number: 10014764
    Abstract: Disclosed herein is a method for controlling an inverter. The method includes calculating a maximum current from an output current of each phase of the inverter; determining a variable level upper limit by performing a DQ conversion for the output current of each phase of the inverter and adding a change allowable value to the DQ converted output current; determining a difference between the maximum current for each phase and the variable level upper limit as an output frequency attenuation variation, when the output current of the inverter arrives at the variable level upper limit; and determining an output frequency based on the output frequency attenuation variation.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 3, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Jae-Moon Lee, Chun-Suk Yang
  • Grid-tied photovoltaic power generation system
    Patent number: 10014687
    Abstract: The present disclosure relates to a grid-tied photovoltaic power generation system, and particularly, to a grid-tied photovoltaic power generation system including a power maintaining unit configured to maintain power of a controller during an corresponding operation time of a photovoltaic system when power supply is stopped due to a fault generated in a grid, whereby power may be stably supplied to the controller and power of the controller may be maintained, designing of the photovoltaic system and setting of a connection to the grid may be simply and easily performed, a corresponding operation of the photovoltaic system may be controlled regarding the fault generated in the grid, and the fault generated in the grid may be accurately, appropriately, and effectively handled.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: July 3, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Kwangsoo Koh
  • Adjustable thermal trip mechanism for circuit breaker
    Patent number: 10014142
    Abstract: An adjustable thermal trip mechanism for a circuit breaker is provided which can improve the reliability of over-current tripping by minimizing an influence upon thermal tripping even if an assembly error such as skewing or twisting occurs during assembly of bimetallic strips. The adjustable thermal trip mechanism for the circuit breaker comprises: a crossbar that is rotatable and has at least one power receiving portion for receiving rotary power; a bimetallic strip that can bend towards the power receiving portion when an over current occurs on the circuit; and an adjustment screw installed to face the power receiving portion, wherein the power receiving portion comprises a plurality of planar portions which are at different distances from the adjustment screw.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: July 3, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Kwangwon Lee
  • Apparatus for correcting current reference
    Patent number: 10014811
    Abstract: The present disclosure relates to an apparatus for correcting a current reference, and more particularly, to an apparatus for correcting a current reference including a calculation unit configured to set a first torque reference section and a second torque reference section using candidate values of a correction factor that corrects the current reference so as to enable the current reference to satisfy rated operating conditions of the induction machine, and calculate the correction factor according to a section, in which the torque reference is included, of the first torque reference section and the second torque reference section, and a correction unit configured to correct the current reference using the correction factor.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: July 3, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Mi-Rim Jeon
  • POSITION INDICATOR OF AIR CIRCUIT BREAKER
    Publication number: 20180182586
    Abstract: In the present disclosure, a link part is connected to a worm wheel rotated according to rotation of a worm gear and a movement member is connected to the link part, whereby a rotational motion of the worm wheel is changed to a translational motion in a horizontal direction through the link part and the movement member. Thus, although an indicator is positioned on an upper side of a handle insertion part, a position according to movement of a circuit breaker body may be easily indicated, while using a simple structure.
    Type: Application
    Filed: July 6, 2017
    Publication date: June 28, 2018
    Applicant: LSIS CO., LTD.
    Inventor: Kyujung KIM
  • Lighting fixture and system using free space optical communication process
    Patent number: 10009111
    Abstract: A light fixture includes an array of light-emitting elements for generating light from the light fixture, and the array of light-emitting elements includes a defined sub-array of light-emitting elements. An alternate array of light-emitting elements is coupled in parallel with the defined sub-array of alternate light-emitting elements of the light emitter. Each of the sub-array and the alternate array are coupled with a respective switch element. A control circuit is coupled with the switch elements and configured for selectively switching power between the sub-array and the alternate array for modulating the operation of the sub-array and alternate array of light-emitting elements to generate modulated communication signals.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: June 26, 2018
    Assignee: LSI Industries, Inc.
    Inventors: Robin Tim Frodsham, Mark Van Wagoner
  • PLC system and operating method thereof
    Patent number: 10007245
    Abstract: A programmable logic controller (PLC) system is provided. The programmable logic controller (PLC) system divides a memory region into a plurality of regions according to a function, and reads or transmits data from or to the divided regions according to an operation mode to be performed, wherein the plurality of regions obtained through division includes: a first storage region storing log data on the PLC system; and a second storage region storing a hyper text markup language (HTML) file.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: June 26, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Geon Ho Lee
  • Apparatus for controlling DC link voltage in power cell of medium-voltage inverter
    Patent number: 10008937
    Abstract: Disclosed herein is an apparatus for controlling DC link voltage in power cells of a medium-voltage inverter. The apparatus controls DC link voltage in single-phase I/O power cells in the medium-voltage inverter, by way of using a first average power based on a positive sequence voltage and a positive sequence current to output a first DC link voltage reference for controlling the average value of the DC link voltages, and using a second average power based on a negative sequence voltage and a positive sequence current or a positive sequence voltage and a negative sequence current to output a second DC link voltage reference for controlling an interphase DC link voltage.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: June 26, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Jong-Je Park, Seung-Ki Sul, Jeong-Mock Yoo, Hyun-Sam Jung
  • Battery energy storage system
    Patent number: 10003199
    Abstract: A power supply system includes: an electricity generation device configured to generate electrical energy; a plurality of DC/AC converters configured to convert the electrical energy into AC; and a battery energy storage system (BESS) configured to receive and charge the electrical energy and supplies the electrical energy to the plurality of DC/AC converters by discharging the charged electrical energy. The electrical energy generated by the electricity generation device charges the BESS without going through the plurality of DC/AC converters.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: June 19, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Yong Ho Chung, Byung Kwan Kang, Ah Ryeon Park
  • Apparatus for controlling operation of power conversion device and monitoring operation state of relay
    Patent number: 10003296
    Abstract: The present invention relates to an apparatus for controlling the operation of a power conversion device including a rectifier part, an initial charging part, a DC-link part and an inverter part. The apparatus includes: a control part configured to drive a relay connected in parallel to an initial charging resistor of the initial charging part if a DC-link voltage of the DC-link part exceeds a first reference voltage during initial charging for the DC-link part; a relay monitoring part configured to monitor whether or not the relay is normally being operated when the relay is driven; and an inverter driving part configured to stop of the driving of the inverter part if it is determined that the relay is not normally being operated by referring to a result of the monitoring of the relay monitoring part.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: June 19, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Tae-Suk Bae, Chun-Suk Yang
  • Method for controlling operation of moving average filter
    Patent number: 9998101
    Abstract: The present invention relates to a method for controlling the operation of a moving average filter, which is capable of optimizing the ability to cope with a surge noise through reasonable control of a tracking speed with respect to a change in an input value. The method includes: (a) a step of setting a stability reference value and a corresponding sampling interval; (b) a step of inputting measurement data; (c) a step of calculating a first moving average using the measurement data input in the step (b) by applying a basic sampling interval; and (d) a step of calculating a second moving average for the measurement data by applying the sampling interval corresponding to the stability reference value set in the step (a) if the first moving average is equal to or larger than the stability reference value.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: June 12, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jo-Dong Park
  • Circuit breaker having closing resistor
    Patent number: 9997321
    Abstract: Disclosed herein is a circuit breaker having a closing resistor, which is capable of preventing impact caused when the circuit breaker is opened and closed from being transferred to peripheral structures. The circuit breaker having a closing resistor includes a fixed part having a fixed contact, a movable part having a movable contact, a closing resistor unit connected to the fixed part and having a closing resistor unit contact, a closing resistor movable part connected to the movable part and having a closing resistor movable contact, and a support structure slidably coupled to the closing resistor unit in a direction parallel to a movement direction of the closing resistor movable part, thereby enabling impact and vibration applied to the closing resistor unit to be absorbed by the support structure.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 12, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jong-Hyuk Lee
  • Power failure monitoring device of digital protection relay
    Patent number: 9997048
    Abstract: Embodiments of a power failure monitoring device of a digital protection relay capable of preventing a relay operation error and a data loss by determining a power failure when an electric power voltage being detected is dropped to be equal to or less than a prestored power failure reference voltage to enable a controller to perform a power failure preparation operation are provided.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: June 12, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Byung-Joon Jeon
  • Method for controlling trip event of inverter
    Patent number: 9997904
    Abstract: Disclosed herein is a method for controlling a trip event of an inverter by taking into account the temperature of the inverter. The method includes: sensing a change in temperature of the inverter for an overload current measurement time using the temperature sensing circuit; determining an amount of heat emitted from the inverter based on the change in temperature; determining an electrical energy of the inverter consumed for the overload current measurement time; determining a compensation reference time based on the amount of heat and the electrical energy; and comparing the compensation reference time with the overload current measurement time to trip the inverter. As a result, the actual temperature of the inverter measured when the inverter is in operation is reflected, so that the trip event of the inverter can be controlled more accurately.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: June 12, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Hong-Seok Kim, Chun-Suk Yang