Patents by Inventor Chun Suk Yang

Chun Suk Yang 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).

  • Publication number: 20200286679
    Abstract: The present disclosure relates to a reinforced insulation transformer and a design method thereof. The reinforced insulation transformer according to an embodiment of the present disclosure is a transformer in which a secondary winding is wound on a primary winding so that the primary winding and the secondary winding have a stacked structure and satisfy a reinforced insulation criterion, wherein each of the primary winding and the secondary winding includes a conducting wire and an insulation outer layer that surrounds the conducting wire, and the insulation outer layer of the secondary winding has more layers or a greater thickness than the insulation outer layer of the primary winding.
    Type: Application
    Filed: September 17, 2019
    Publication date: September 10, 2020
    Inventors: Deok Young LIM, Chun Suk YANG
  • Patent number: 10716237
    Abstract: The present invention relates to a device for driving a motor, the device comprising: a main housing for accommodating a circuit module therein, wherein a top of the main housing is partially opened to define an open portion; an input/output (IO) cover coupled to the main housing so as to occupy the open portion; and an auxiliary housing coupled to the main housing at an vertical side face of the main housing.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: July 14, 2020
    Assignee: LSIS CO., LTD.
    Inventors: Dong-Sik Kim, Chun-Suk Yang
  • Patent number: 10658946
    Abstract: Disclosed is a device for detecting an instantaneous maximum output current of an inverting module as a peak-current thereof. The inverting module converts a direct current (DC) link voltage to an alternate current (AC) voltage, and includes three-phases legs. Each leg has lower and upper switching elements connected in series. The device includes a shunt resistor serially connected to a lower switching element of each leg of the inverting module; a current detection module configured for detecting an output current from a signal output from each shunt resistor; and a summer configured for receiving and summing the detected output currents from the current detection module and outputting the instantaneous maximum output current of the inverting module as the peak-current thereof.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: May 19, 2020
    Assignee: LSIS CO., LTD.
    Inventors: Jae-Moon Lee, Chun-Suk Yang
  • Patent number: 10622885
    Abstract: The present invention relates to a method for controlling an inverter to prevent an unnecessary fan trip. The method includes: receiving a fan current; when the fan current is above a high trip level or is below a low trip level, incrementing an error count; when the error count reaches an error count maximum value, incrementing a trip count and initializing the error count; and when the trip count reaches a trip count maximum value, generating a fan trip signal.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: April 14, 2020
    Assignee: LSIS CO., LTD.
    Inventors: Tae-Suk Bae, Deok-Young Lim, Hu-Jin Lee, Chun-Suk Yang
  • Patent number: 10615683
    Abstract: Disclosed is a method for controlling an inverter. The method includes detecting an output current from an inverter to determine a software over-current suppression (S/W OCS) level according to an output frequency of the output current.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: April 7, 2020
    Assignee: LSIS CO., LTD.
    Inventors: Chun-Suk Yang, Jae-Moon Lee, Jae-Sung Kim
  • Patent number: 10566911
    Abstract: A device and method for controlling an inverter is disclosed. The inverter-controlling device in accordance with the present disclosure determines an operation state of a switching element of an initial charging module based on predetermined time durations and a magnitude of a DC link voltage measured at each of time points corresponding to the predetermined time durations.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: February 18, 2020
    Assignee: LSIS CO., LTD.
    Inventors: Deok-Young Lim, Hu-Jin Lee, Chun-Suk Yang
  • Patent number: 10490917
    Abstract: The present disclosure relates to a motor-driving device with an improved structure of a circuit module. According to the present disclosure, the boards are coupled to each other via a connector or a bolt. This removes wires use, and reduces an assembly tolerance, thereby to improve the device productivity.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: November 26, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Hong-Seok Kim, Dong-Sik Kim, Chun-Suk Yang
  • Publication number: 20190346491
    Abstract: Disclosed is a device for detecting a phase loss in an output current in an inverter. The device includes: an output current detection unit for detecting two phases output currents from two signals output from two shunt-resistors connected to two phases legs respectively; an output current calculation unit for calculating an output current of one remaining phase using the detected two phases output currents; and an output phase loss detection unit configured for detecting an output phase loss when the calculated output current is within a current band corresponding to the output phase loss or when the calculated output current has a magnitude equal to and a sign opposite to one of the detected two phases output currents.
    Type: Application
    Filed: March 29, 2019
    Publication date: November 14, 2019
    Inventors: Chengde XU, Chun-Suk YANG
  • Publication number: 20190348905
    Abstract: The present invention relates to a method for controlling an inverter to prevent an unnecessary fan trip. The method includes: receiving a fan current; when the fan current is above a high trip level or is below a low trip level, incrementing an error count; when the error count reaches an error count maximum value, incrementing a trip count and initializing the error count; and when the trip count reaches a trip count maximum value, generating a fan trip signal.
    Type: Application
    Filed: February 22, 2019
    Publication date: November 14, 2019
    Inventors: Tae-Suk BAE, Deok-Young LIM, Hu-Jin LEE, Chun-Suk Yang
  • Publication number: 20190341710
    Abstract: The present disclosure relates to a motor-driving device with an improved structure of a circuit module. According to the present disclosure, the boards are coupled to each other via a connector or a bolt. This removes wires use, and reduces an assembly tolerance, thereby to improve the device productivity.
    Type: Application
    Filed: February 19, 2019
    Publication date: November 7, 2019
    Inventors: Hong-Seok KIM, Dong-Sik KIM, Chun-Suk YANG
  • Publication number: 20190305693
    Abstract: Disclosed is a device for detecting an instantaneous maximum output current of an inverting module as a peak-current thereof. The inverting module converts a direct current (DC) link voltage to an alternate current (AC) voltage, and includes three-phases legs. Each leg has lower and upper switching elements connected in series. The device includes a shunt resistor serially connected to a lower switching element of each leg of the inverting module; a current detection module configured for detecting an output current from a signal output from each shunt resistor; and a summer configured for receiving and summing the detected output currents from the current detection module and outputting the instantaneous maximum output current of the inverting module as the peak-current thereof.
    Type: Application
    Filed: February 22, 2019
    Publication date: October 3, 2019
    Inventors: Jae-Moon LEE, Chun-Suk YANG
  • Publication number: 20190296936
    Abstract: A heterogeneous fieldbus-based gateway system includes a master inverter and a control device. The control device is configured to transmit, to the master inverter, a data indicating that the same monitoring or control command is to be transmitted to all of the master inverter and a plurality of slave inverters. When the master inverter determines based on the data that the control device transmits the same monitoring or control command to all of the master inverter and the plurality of slave inverters, the master inverter is configured to transmit a response to the command to the control device and to transmit the command to each of the slave inverters.
    Type: Application
    Filed: March 20, 2019
    Publication date: September 26, 2019
    Inventors: Jong-Chan KIM, Chun-Suk YANG
  • Publication number: 20190267913
    Abstract: A device and method for controlling an inverter is disclosed. The inverter-controlling device in accordance with the present disclosure determines an operation state of a switching element of an initial charging module based on predetermined time durations and a magnitude of a DC link voltage measured at each of time points corresponding to the predetermined time durations.
    Type: Application
    Filed: February 18, 2019
    Publication date: August 29, 2019
    Inventors: Deok-Young LIM, Hu-Jin LEE, Chun-Suk YANG
  • Publication number: 20190239382
    Abstract: The present invention relates to a device for driving a motor, the device comprising: a main housing for accommodating a circuit module therein, wherein a top of the main housing is partially opened to define an open portion; an input/output (IO) cover coupled to the main housing so as to occupy the open portion; and an auxiliary housing coupled to the main housing at an vertical side face of the main housing.
    Type: Application
    Filed: January 25, 2019
    Publication date: August 1, 2019
    Inventors: Dong-Sik KIM, Chun-Suk YANG
  • Patent number: 10314211
    Abstract: Disclosed herein is an assembly structure for a motor drive unit. An assembly structure for a motor drive unit is disclosed. The assembly structure does not require the time for rotating, laying down, or fastening the components during processes of producing it, so that the time required for production can be shortened. In addition, since no separate fastening part is required, the assembly structure can be simplified and the production costs can be reduced.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 4, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Dong-Sik Kim, Chun-Suk Yang
  • Patent number: 10247625
    Abstract: The present invention relates to an apparatus for correcting a temperature sensing signal of an IGBT temperature sensing device which outputs only a temperature sensing signal having a voltage value equal to or higher than a preset voltage value, by using an output limiting diode. The apparatus includes: a calculating part configured to calculate a conduction current value of the output limiting diode by using the resistance of an NTC thermistor included in the IGBT temperature sensing device; a determining part configured to determine a drop voltage value of a voltage drop occurring in the output limiting diode based on the conduction current value; and a correcting part configured to correct the temperature sensing signal by increasing the voltage of the temperature sensing signal output from the IGBT temperature sensing device by the drop voltage value.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: April 2, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Hong-Seok Kim, Jae-Moon Lee, Chun-Suk Yang
  • Patent number: 10251320
    Abstract: Disclosed is a managing device for cooling an inverter. The managing device for cooling an inverter includes a fan controller configured to provide an electric current flowing in a cooling fan; and a controller configured to determine whether the current flowing in the cooling fan is out of a preset range, and, when the current is out of the preset range, configured to control the cooling fan with a control voltage different from an operating voltage of the cooling fan.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: April 2, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Chun-Suk Yang, Tae-Suk Bae
  • Patent number: 10178759
    Abstract: Disclosed herein is a board apparatus including a printed circuit board, including a first ground wiring disposed on one surface of the printed circuit board; a second ground wiring disposed on the other surface of the printed circuit board; and a switch module disposed in an overlapped region between the first ground wiring and the second ground wiring, and including a bolt which penetrates through the printed circuit board and a nut which is in contact with the second ground wiring and is coupled to a screw of the bolt.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: January 8, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Deok-Young Lim, Chun-Suk Yang
  • Patent number: 10175274
    Abstract: Disclosed is a device for detecting an output current of an inverter. The device for detecting an output current of an inverter according to the present disclosure includes a shunt resistor connected to an output end of a capacitor of a direct current (DC) link; a detector connected to the shunt resistor and configured to detect the output current; and a controller configured to control a sampling timing of a current in the detector.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: January 8, 2019
    Assignee: LSIS CO., LTD.
    Inventors: Chun-Suk Yang, Chengde Xu
  • Publication number: 20180295716
    Abstract: Disclosed herein is a board apparatus including a printed circuit board, including a first ground wiring disposed on one surface of the printed circuit board; a second ground wiring disposed on the other surface of the printed circuit board; and a switch module disposed in an overlapped region between the first ground wiring and the second ground wiring, and including a bolt which penetrates through the printed circuit board and a nut which is in contact with the second ground wiring and is coupled to a screw of the bolt.
    Type: Application
    Filed: January 9, 2018
    Publication date: October 11, 2018
    Inventors: Deok-Young Lim, Chun-Suk Yang