Patents by Inventor Jung Ki Hong
Jung Ki Hong 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: 11909303Abstract: A bypass device of an HVDC sub module according to the present invention comprises: a sub module for generating a voltage in an HVDC system; a bypass switch driving unit for driving a bypass switch located at an input terminal of the sub module; a sub module controller for monitoring a state of the sub module to transmit the monitored state to a system controller, and controlling the sub module and the bypass switch driving unit according to a command of the system controller; and a voltage monitoring unit for controlling the bypass switch driving unit by monitoring a voltage of a capacitor located in the sub module.Type: GrantFiled: May 11, 2021Date of Patent: February 20, 2024Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATIONInventors: Jung Ki Hong, Dong Woo Seo
-
Publication number: 20220231594Abstract: A bypass device of an HVDC sub module according to the present invention comprises: a sub module for generating a voltage in an HVDC system; a bypass switch driving unit for driving a bypass switch located at an input terminal of the sub module; a sub module controller for monitoring a state of the sub module to transmit the monitored state to a system controller, and controlling the sub module and the bypass switch driving unit according to a command of the system controller; and a voltage monitoring unit for controlling the bypass switch driving unit by monitoring a voltage of a capacitor located in the sub module.Type: ApplicationFiled: May 11, 2021Publication date: July 21, 2022Inventors: Jung Ki HONG, Dong Woo SEO
-
Patent number: 10476255Abstract: Disclosed is a DC circuit breaker capable of interrupting fault currents flowing in both forward and backward directions. The DC circuit breaker includes: a mechanical switch installed on a DC transmission line and being opened to interrupt a current in the DC transmission line when a fault occurs at one side or remaining side thereof on the DC transmission line; a first bidirectional switching device connected in parallel with the mechanical switch and switching currents flowing in both forward and backward directions; an LC circuit connected in parallel with the mechanical switch and including a capacitor and a reactor connected in series to induce LC resonance; a first unidirectional switching device connected in parallel with the LC circuit and switching a current to induce LC resonance; and a second bidirectional switching device connected in series with the LC circuit and switching currents flowing in both forward and backward directions.Type: GrantFiled: December 24, 2015Date of Patent: November 12, 2019Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATIONInventors: Byung Choul Kim, Jung Ki Hong, Young Seong Han
-
Patent number: 10418210Abstract: Disclosed is a DC circuit breaker capable of interrupting fault currents flowing in both forward and backward directions. The DC circuit breaker includes: a first mechanical switch for interrupting a current in a DC transmission line; a first diode connected in parallel with the first mechanical switch; a second mechanical switch, connected in series with the first mechanical switch, for interrupting a current in the DC transmission line; a second diode connected in parallel with the second mechanical switch; an LC circuit connected in parallel with the first and second mechanical switches and including a capacitor and a reactor connected in series to induce LC resonance; a first unidirectional switching device connected in parallel with the LC circuit and switching a current to induce LC resonance; and a bidirectional switching device connected in series with the LC circuit and switching currents flowing in both forward and backward directions.Type: GrantFiled: December 24, 2015Date of Patent: September 17, 2019Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATIONInventors: Byung Choul Kim, Se Hee Han, Jung Ki Hong, Young Seong Han
-
Publication number: 20180019084Abstract: Disclosed is a DC circuit breaker capable of interrupting fault currents flowing in both forward and backward directions. The DC circuit breaker includes: a first mechanical switch for interrupting a current in a DC transmission line; a first diode connected in parallel with the first mechanical switch; a second mechanical switch, connected in series with the first mechanical switch, for interrupting a current in the DC transmission line; a second diode connected in parallel with the second mechanical switch; an LC circuit connected in parallel with the first and second mechanical switches and including a capacitor and a reactor connected in series to induce LC resonance; a first unidirectional switching device connected in parallel with the LC circuit and switching a current to induce LC resonance; and a bidirectional switching device connected in series with the LC circuit and switching currents flowing in both forward and backward directions.Type: ApplicationFiled: December 24, 2015Publication date: January 18, 2018Inventors: Byung Choul KIM, Se Hee HAN, Jung Ki HONG, Young Seong HAN
-
Publication number: 20170358917Abstract: Disclosed is a DC circuit breaker capable of interrupting fault currents flowing in both forward and backward directions. The DC circuit breaker includes: a mechanical switch installed on a DC transmission line and being opened to interrupt a current in the DC transmission line when a fault occurs at one side or remaining side thereof on the DC transmission line; a first bidirectional switching device connected in parallel with the mechanical switch and switching currents flowing in both forward and backward directions; an LC circuit connected in parallel with the mechanical switch and including a capacitor and a reactor connected in series to induce LC resonance; a first unidirectional switching device connected in parallel with the LC circuit and switching a current to induce LC resonance; and a second bidirectional switching device connected in series with the LC circuit and switching currents flowing in both forward and backward directions.Type: ApplicationFiled: December 24, 2015Publication date: December 14, 2017Applicant: HYOSUNG CORPORATIONInventors: Byung Choul KIM, Jung Ki HONG, Young Seong HAN
-
Patent number: 6931242Abstract: A down converter using a C/N ratio correcting circuit of a base station for a mobile communication network includes: a first splitter for splitting an RF signal applied from an antenna; a VGA for controlling the gain of the RF signal split by the first splitter; a down converter for receiving the RF signal gain-compensated by the VGA and converting it to an IF signal; an amplifier for amplifying the RF signal split by the first splitter; a first voltage detect circuit for converting the RF signal applied from the amplifier to a voltage; a second voltage detect circuit for converting the IF signal fedback from the down converter to a voltage; and a comparator for comparing the voltage applied from the second voltage detect circuit and the voltage applied from the first voltage detect circuit and controlling the VGA.Type: GrantFiled: February 27, 2001Date of Patent: August 16, 2005Assignee: LG Electronics Inc.Inventor: Jung Ki Hong
-
Publication number: 20010018335Abstract: A down converter using a C/N ratio correcting circuit of a base station for a mobile communication network includes: a first splitter for splitting an RF signal applied from an antenna; a VGA for controlling the gain of the RF signal split by the first splitter; a down converter for receiving the RF signal gain-compensated by the VGA and converting it to an IF signal; an amplifier for amplifying the RF signal split by the first splitter; a first voltage detect circuit for converting the RF signal applied from the amplifier to a voltage; a second voltage detect circuit for converting the IF signal fedback from the down converter to a voltage; and a comparator for comparing the voltage applied from the second voltage detect circuit and the voltage applied from the first voltage detect circuit and controlling the VGA.Type: ApplicationFiled: February 27, 2001Publication date: August 30, 2001Applicant: LG Electronics Inc.Inventor: Jung Ki Hong