Patents by Inventor Seong Jin OH

Seong Jin OH 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).

  • Patent number: 10312709
    Abstract: A method of charging a battery by a charging system comprising a master charging circuit and N (N is a natural number) slave charging circuits. The method includes: sourcing a first current to a single-wired bus by the master charging circuit; absorbing (sinking) a second current from the single-wired bus by the N slave charging circuits connected to the single-wired bus; identifying a single-wired bus voltage formed on the single-wired bus at a particular time point by the master charging circuit; and identifying the number of slave charging circuits based on the single-wired bus voltage by the master charging circuit.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: June 4, 2019
    Assignee: Silicon Mitus, Inc.
    Inventors: Ho Jun Shin, Kang Yoon Lee, Kwang Muk Choi, Ii Kwon Jang, Han Suk Seo, Hyung Gu Park, Young Jun Park, Seong Jin Oh, Ju Hyun Park, Jung Yeon Kim
  • Patent number: 10003345
    Abstract: A clock and data recovery circuit is disclosed herein. The clock and data recovery circuit includes a phase detection unit, a charge pump, a loop filter, a voltage control oscillator, and a frequency detection unit. The voltage control oscillator has oscillation frequency that is variable in response to a frequency adjustment signal, and outputs an oscillation signal. The frequency detection unit includes a reference clock divider, a counter, and an oscillation frequency control unit. The reference clock divider generates a count-enable signal based on a reference clock signal. The counter generates an oscillation count signal by counting the pulses of the oscillation signal of the voltage control oscillator or the pulses of divided signals resulting from dividing the oscillation signal while the count-enable signal is being enabled. The oscillation frequency control unit compares a target count value with the value of the oscillation count signal, and outputs the frequency adjustment signal.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 19, 2018
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Kang Yoon Lee, Sang Yun Kim, In Seong Kim, Seong Jin Oh, Dong Soo Lee
  • Publication number: 20180026467
    Abstract: A method of charging a battery by a charging system comprising a master charging circuit and N (N is a natural number) slave charging circuits. The method includes: sourcing a first current to a single-wired bus by the master charging circuit; absorbing (sinking) a second current from the single-wired bus by the N slave charging circuits connected to the single-wired bus; identifying a single-wired bus voltage formed on the single-wired bus at a particular time point by the master charging circuit; and identifying the number of slave charging circuits based on the single-wired bus voltage by the master charging circuit.
    Type: Application
    Filed: July 18, 2017
    Publication date: January 25, 2018
    Inventors: Ho Jun SHIN, Kang Yoon LEE, Kwang Muk CHOI, Il Kwon JANG, Han Suk SEO, Hyung Gu PARK, Young Jun PARK, Seong Jin OH, Ju Hyun PARK, Jung Yeon KIM
  • Patent number: 9876440
    Abstract: Disclosed herein is an active rectifier. The rectifier includes a rectifier unit, a driver unit, and a switching device control circuit unit. The rectifier unit includes first and fourth transistors configured to become conductive when the voltage of an alternating current (AC) input is negative and apply the current of the AC input to a rectifier capacitor, and second and third transistors configured to become conductive when the voltage of the AC input is positive and apply the current of the AC input to the rectifier capacitor. The driver unit outputs first to fourth drive control signals, and drives the first to fourth transistors. The switching device control circuit unit compares the first drive control signal and the second drive control signal with the AC input, and outputs switching device control signals to delay the first to fourth drive control signals based on the extents to delay.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: January 23, 2018
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Kang Yoon Lee, Seong Jin Oh, Youngoo Yang, Keum Cheol Hwang, Young Jun Park, Sang Yun Kim, Byeong Gi Jang, Jung Yeon Kim
  • Patent number: 9843251
    Abstract: A rectifier includes: a rectifying circuit configured to rectify alternating current (AC) power into direct current (DC) power through a switching operation; a driver configured to apply a switching signal to the rectifying circuit; and a signal modulator configured to select a parameter from among parameters of the switching signal based on a frequency of the switching signal, and adjust the selected parameter.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: December 12, 2017
    Assignees: Samsung Electro-Mechanics Co., Ltd., University of Seoul Industry Cooperation Foundation
    Inventors: Byung Joo Hong, Jong Woo Lee, Hyung Gu Park, Young Jun Park, Seong Jin Oh, Kang Yoon Lee, Joong Ho Choi, Hong Jin Kim, Je Hyuk Ryu, Jung Yeon Kim
  • Publication number: 20160373023
    Abstract: A rectifier includes: a rectifying circuit configured to rectify alternating current (AC) power into direct current (DC) power through a switching operation; a driver configured to apply a switching signal to the rectifying circuit; and a signal modulator configured to select a parameter from among parameters of the switching signal based on a frequency of the switching signal, and adjust the selected parameter.
    Type: Application
    Filed: June 10, 2016
    Publication date: December 22, 2016
    Applicants: Samsung Electro-Mechanics Co., Ltd., University of Seoul Industry Cooperation Foundation
    Inventors: Byung Joo HONG, Jong Woo LEE, Hyung Gu PARK, Young Jun PARK, Seong Jin OH, Kang Yoon LEE, Joong Ho CHOI, Hong Jin KIM, Je Hyuk RYU, Jung Yeon KIM
  • Publication number: 20160234007
    Abstract: A clock and data recovery circuit is disclosed herein. The clock and data recovery circuit includes a phase detection unit, a charge pump, a loop filter, a voltage control oscillator, and a frequency detection unit. The voltage control oscillator has oscillation frequency that is variable in response to a frequency adjustment signal, and outputs an oscillation signal. The frequency detection unit includes a reference clock divider, a counter, and an oscillation frequency control unit. The reference clock divider generates a count-enable signal based on a reference clock signal. The counter generates an oscillation count signal by counting the pulses of the oscillation signal of the voltage control oscillator or the pulses of divided signals resulting from dividing the oscillation signal while the count-enable signal is being enabled. The oscillation frequency control unit compares a target count value with the value of the oscillation count signal, and outputs the frequency adjustment signal.
    Type: Application
    Filed: December 11, 2015
    Publication date: August 11, 2016
    Applicant: Research & Business Foundation Sungkyunkwan Univer sity
    Inventors: Kang Yoon LEE, Sang Yun KIM, In Seong KIM, Seong Jin OH, Dong Soo LEE
  • Patent number: 9148070
    Abstract: A high power control system includes: a single energy source; an energy source management unit configured to manage the energy source; a controller configured to output a PWM control signal under control of the energy source management unit; a plurality of inverters configured to convert a direct current into an alternating current under control of the PWM control signal of the controller; a plurality of filters coupled to output terminals of the inverters; and a plurality of switches configured to regulate connections between the filters and a load under control of a regulation control signal of the controller.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: September 29, 2015
    Assignee: DESTIN POWER INC.
    Inventors: Young Sang Bae, Seong Jin Oh
  • Publication number: 20140119069
    Abstract: A high power control system includes: a single energy source; an energy source management unit configured to manage the energy source; a controller configured to output a PWM control signal under control of the energy source management unit; a plurality of inverters configured to convert a direct current into an alternating current under control of the PWM control signal of the controller; a plurality of filters coupled to output terminals of the inverters; and a plurality of switches configured to regulate connections between the filters and a load under control of a regulation control signal of the controller.
    Type: Application
    Filed: May 31, 2013
    Publication date: May 1, 2014
    Inventors: Young Sang BAE, Seong Jin Oh
  • Patent number: 8681515
    Abstract: An energy generation system includes an inverter for converting a DC voltage into an AC voltage, a three-phase/two-phase transformer for transforming an output of the inverter into a three-phase/two-phase stationary coordinate system, a phase locked loop for calculating the phase and frequency of an output voltage of the inverter, a phase shifter for generating a current phase reference value, a current reference coordinate transformer for transforming the current phase reference value and the current amplitude reference value into a two-phase stationary coordinate system, a current phase calculator for outputting a current phase calculation value, a current phase calculator for outputting a current amplitude calculation value, a current adjuster for generating a current adjustment signal, an output three-phase transformer for transforming the current adjustment signal into a current adjustment signal in a three-phase stationary coordinate system, and a PWM controller for outputting a PWM control signal.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: March 25, 2014
    Assignee: Kaco New Energy Inc.
    Inventors: Young Sang Bae, Seong Jin Oh, Kyoung Hwan Kim
  • Patent number: 8611117
    Abstract: Provided are a solar energy generation system having an adaptive maximum power point tracking function and a method thereof. The solar energy generation system includes: a minimum maintenance voltage determination unit configured to output a minimum maintenance voltage which enables the inverter to maintain an operation thereof corresponding to a grid voltage of the grid; a maximum power point tracking controller configured to determine a maximum power point tracking voltage at a maximum power point of the photovoltaic module, using the minimum maintenance voltage and an output voltage and output current of the photovoltaic module, and to output a reference voltage to track the maximum power point; a voltage calculator configured to calculate a difference between the reference voltage and the output voltage of the photovoltaic module; and a voltage adjuster configured to generate a reference current value using an output of the voltage calculator.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: December 17, 2013
    Assignee: Kaco New Energy Inc.
    Inventors: Kyoung Hwan Kim, Young Sang Bae, Seong Jin Oh
  • Publication number: 20130077366
    Abstract: Provided are a solar energy generation system having an adaptive maximum power point tracking function and a method thereof. The solar energy generation system includes: a minimum maintenance voltage determination unit configured to output a minimum maintenance voltage which enables the inverter to maintain an operation thereof corresponding to a grid voltage of the grid; a maximum power point tracking controller configured to determine a maximum power point tracking voltage at a maximum power point of the photovoltaic module, using the minimum maintenance voltage and an output voltage and output current of the photovoltaic module, and to output a reference voltage to track the maximum power point; a voltage calculator configured to calculate a difference between the reference voltage and the output voltage of the photovoltaic module; and a voltage adjuster configured to generate a reference current value using an output of the voltage calculator.
    Type: Application
    Filed: October 21, 2011
    Publication date: March 28, 2013
    Inventors: Kyoung Hwan KIM, Young Sang Bae, Seong Jin Oh
  • Publication number: 20130076151
    Abstract: A photovoltaic generation system using grid-connected parallel inverters comprises a plurality of photovoltaic generation devices connected in parallel with each other, and a transformer configured to transform and transfer output voltages of the photovoltaic generation devices to a grid, wherein the photovoltaic generation device includes: a photovoltaic module configured to convert photovoltaic energy into DC electrical energy; an inverter configured to convert the DC electrical energy outputted from the photovoltaic module into AC electrical energy; an LC filter configured to remove noise included in the AC electrical energy which is outputted from the inverter; and a Y-connected capacitor group which is connected between one terminal of a reactor in the LC filter and one terminal of the photovoltaic module and is configured to reduce stray current.
    Type: Application
    Filed: October 21, 2011
    Publication date: March 28, 2013
    Inventors: Young Sang BAE, Seong Jin Oh, Kyoung Hwan Kim
  • Publication number: 20130058139
    Abstract: A new and renewable energy generation system includes: an inverter for converting a DC voltage into an AC voltage; a three-phase/two-phase transformer for transforming an output of the inverter into a three-phase/two-phase stationary coordinate system; a phase locked loop for calculating the phase and frequency of an output voltage of the inverter; a phase shifter for generating a current phase reference value; a current reference coordinate transformer for transforming the current phase reference value and the current amplitude reference value into a two-phase stationary coordinate system; a current phase calculator for outputting a current phase calculation value; a current phase calculator for outputting a current amplitude calculation value; a current adjuster for generating a current adjustment signal; an output three-phase transformer for transforming the current adjustment signal into a current adjustment signal in a three-phase stationary coordinate system; and a PWM controller for outputting a PWM co
    Type: Application
    Filed: October 21, 2011
    Publication date: March 7, 2013
    Inventors: Young Sang BAE, Seong Jin OH, Kyoung Hwan KIM