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).
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Patent number: 9472335Abstract: A transformer module for an electric vehicle is provided. The transformer module includes a bobbin round which a primary-side coil is wound, a printed circuit board, and a secondary-side bus bar disposed between the bobbin and the printed circuit board, wherein a pattern part formed of an electrically conductive material to contact the bus bar is provided on the printed circuit board to electrically connect the pattern part to the bus bar in parallel.Type: GrantFiled: January 3, 2014Date of Patent: October 18, 2016Assignee: LSIS CO., LTD.Inventors: Jong In Sun, Woo Sup Kim, Bo Hyun Youn, Chun Suk Yang
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Publication number: 20160248245Abstract: 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: ApplicationFiled: February 4, 2016Publication date: August 25, 2016Inventors: Hong-Seok Kim, Chun-Suk Yang
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Patent number: 9413280Abstract: An inverter is provided. The inverter includes a current providing unit providing a first axis current and a second axis current to an induction motor; a revolutions per minute (RPM) measuring unit measuring the RPM of the induction motor; and a control unit changing the second axis current according to the measured RPM.Type: GrantFiled: March 25, 2014Date of Patent: August 9, 2016Assignee: LSIS CO., LTD.Inventors: Byung Woon Jang, Chun Suk Yang, Jae Hoon Jang, Joong Ki Jung, Sun Woo Lee
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Publication number: 20160111952Abstract: According to an embodiment, a method of controlling an inverter including a rectification unit rectifying inputted AC power to DC power, a smoothing unit smoothing the DC power, and a power conversion unit received the DC power from the smoothing unit to convert the received DC power into AC power having a predetermined size and frequency, the method includes receiving an abnormal signal of the inverter or an electric motor for driving the inverter, determining whether a DC terminal voltage of the smoothing unit is equal to or greater than a low voltage failure level when the abnormal signal is received, determining whether the power conversion unit is operating, and blocking current output of the power conversion unit when the DC terminal voltage is equal to or greater than the low voltage failure level and the power conversion unit is operating.Type: ApplicationFiled: July 31, 2015Publication date: April 21, 2016Applicant: LSIS CO., LTD.Inventors: HU JIN LEE, CHUN SUK YANG
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Publication number: 20160028300Abstract: Disclosed is an inverter assembly without galvanic isolation, the inverter assembly including a PCB mounted with a power supply circuit unit, an inverter unit, an analogue circuit unit and a controller, a first ground circuit pattern to supply a ground power to the power supply circuit unit and the inverter unit, a second ground circuit pattern to supply the ground power to the analogue circuit unit, a third ground circuit pattern to supply the ground power to the controller, a first bead between the first ground circuit pattern and the second ground circuit pattern to isolate an impedance between the first ground circuit pattern and the second ground circuit pattern, and a second bead between the second ground circuit pattern and the third ground circuit pattern to isolate an impedance between the second ground circuit pattern and the third ground circuit pattern.Type: ApplicationFiled: June 19, 2015Publication date: January 28, 2016Applicant: LSIS CO., LTD.Inventors: Deokyoung LIM, Chun Suk YANG
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Publication number: 20150366104Abstract: A method for controlling temperature of an inverter system having an inverter and a cooling fan is provided, the method including: obtaining an internal temperature of the inverter and a DC (Direct Current)-link voltage of the inverter; and outputting a fan driving control signal for driving the fan or maintaining the fan being driven to the fan, when the internal temperature is above a predetermined fan drive setting temperature and the DC-link voltage is above a predetermined fan drive setting voltage.Type: ApplicationFiled: June 12, 2015Publication date: December 17, 2015Applicant: LSIS CO., LTD.Inventors: DEOKYOUNG LIM, CHUN SUK YANG
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Patent number: 9214825Abstract: Provided is an apparatus for charging battery in electric vehicle that includes a DC-DC converter unit formed in two channels for converting a charge of the low voltage battery to a power source by receiving a power source from the high voltage battery.Type: GrantFiled: December 19, 2012Date of Patent: December 15, 2015Assignee: LSIS Co., Ltd.Inventors: Jong In Sun, Woo Sup Kim, Chun Suk Yang
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Patent number: 9118254Abstract: Disclosed is a DC-DC converter. The DC-DC converter includes a power input unit to which power is applied, a first module comprising a first transformer and a second transformer to output a first output power transformed according to operations of a first switch and a second switch connected with the first transformer and the second transformer by using the applied power, a second module comprising a third transformer and a fourth transformer to output a second output power transformed according to operations of a third switch and a fourth switch connected with the third transformer and the fourth transformer by using the applied power, an output unit to output a sum of the first output power and the second output power, and a controller to control an interleaving operations between the first module and the second module.Type: GrantFiled: July 1, 2013Date of Patent: August 25, 2015Assignees: LSIS Co., Ltd., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Woo Sup Kim, Jae Ho Lee, Chun Suk Yang, Seoung Woon Lee, Bo Hyung Cho
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Patent number: 8981730Abstract: Provided are a switching device for an electric vehicle and a method of controlling the switching device. The switching device includes a switch, a signal selection part, an inverter, and a controller. The switch generates a first or second switching signal according to an operation mode. The signal selection part receives the first or second switching signal, and selects the first or second switching signal according to the operation mode to output the selected switching signal. The inverter performs a direct current/alternating current conversion process on power according to the switching signal output from the signal selection part, and outputs the power. The controller determines the operation mode, and generates a control signal according to the operation mode such that the signal selection part selects the first or second switching signal.Type: GrantFiled: June 19, 2012Date of Patent: March 17, 2015Assignee: LSIS Co., Ltd.Inventors: Chun Suk Yang, Byung Woon Jang
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Publication number: 20150069936Abstract: An inverter-charger integrated device for an electric vehicle is provided. The inverter-charger integrated device for the electric vehicle includes a motor; a power input unit; a rectifying unit; an inverter; and a control unit, wherein the inverter comprises a first group of switches including first and second switches, a second group of switches including third and fourth switches, and a third group of switches including fifth and sixth switches, the rectifying unit is directly connected to the first of the first to third groups of switches, and phases of the motor are respectively connected to the first to third group of switches.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Applicant: LSIS CO., LTD.Inventors: Jae Hoon JANG, Byung Woon JANG, Joong Ki JUNG, Chun Suk YANG
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Publication number: 20150063401Abstract: Provided is a temperature measurement apparatus using a negative temperature coefficient (NTC) thermistor. A temperature sensor includes the NTC thermistor and a variable resistor part. A resistance value of the variable resistor part varies between a default resistance value for measuring a temperature and a temporary resistance value for determining a disconnection. An abnormal operation determination unit determines whether the NTC thermistor is disconnected, based on an output voltage of the temperature sensor when the variable resistor part has the temporary resistance value.Type: ApplicationFiled: July 22, 2014Publication date: March 5, 2015Applicant: LSIS CO., LTD.Inventors: Ho Sang JIN, Chun Suk YANG, Jae Ho LEE, Chan Gi PARK
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Publication number: 20150063421Abstract: A temperature measurement apparatus using a negative temperature coefficient (NTC) thermister is provided. A temperature sensor includes the NTC thermister and a variable resistor part, in which a resistance value of the variable resistor part varies between a first resistance value for a first output voltage value and a second resistance value for a second output voltage value to allow a voltage value corresponding to a present temperature to be outputted. A voltage temperature matching unit outputs the present temperature based on the first output voltage value and the second output voltage value.Type: ApplicationFiled: August 25, 2014Publication date: March 5, 2015Applicant: LSIS CO., LTD.Inventors: Ho Sang JIN, Chun Suk YANG, Jae Ho LEE, Chan Gi PARK
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Patent number: 8912750Abstract: Disclosed is a charger including a first rectifying portion that rectifies an alternating power and outputs the rectified power to a neutral point of a 3-phase motor; a second rectifying portion/inverter that charges output power of the first rectifying portion in a high-voltage battery in a charging mode and drives the 3-phase motor by switching the charged power of the high-voltage battery in a drive mode; a high-voltage charging controller that controls the first rectifying portion and second rectifying portion/inverter so as to charge the high-voltage battery in the charging mode; and a DSP (Digital Signal Processor) that controls the second rectifying portion/inverter so as to drive the 3-phase motor in the drive mode, and controls the high-voltage charging controller so as to charge the high-voltage battery in the charging mode.Type: GrantFiled: January 24, 2011Date of Patent: December 16, 2014Assignee: LS Industrial Systems Co., Ltd.Inventors: Chun Suk Yang, Jae Ho Lee
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Publication number: 20140340019Abstract: An inverter is provided. The inverter includes a current providing unit providing a first axis current and a second axis current to an induction motor; a revolutions per minute (RPM) measuring unit measuring the RPM of the induction motor; and a control unit changing the second axis current according to the measured RPM.Type: ApplicationFiled: March 25, 2014Publication date: November 20, 2014Applicant: LSIS CO., LTD.Inventors: BYUNG WOON JANG, CHUN SUK YANG, JAE HOON JANG, JOONG KI JUNG, SUN WOO LEE
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Publication number: 20140266554Abstract: A transformer module for an electric vehicle is provided. The transformer module includes a bobbin round which a primary-side coil is wound, a printed circuit board, and a secondary-side bus bar disposed between the bobbin and the printed circuit board, wherein a pattern part formed of an electrically conductive material to contact the bus bar is provided on the printed circuit board to electrically connect the pattern part to the bus bar in parallel.Type: ApplicationFiled: January 3, 2014Publication date: September 18, 2014Applicant: LSIS CO., LTD.Inventors: Jong In SUN, Woo Sup KIM, Bo Hyun YOUN, Chun Suk YANG
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Publication number: 20140104891Abstract: Disclosed is a DC-DC converter. The DC-DC converter includes a power input unit to which power is applied, a first module comprising a first transformer and a second transformer to output a first output power transformed according to operations of a first switch and a second switch connected with the first transformer and the second transformer by using the applied power, a second module comprising a third transformer and a fourth transformer to output a second output power transformed according to operations of a third switch and a fourth switch connected with the third transformer and the fourth transformer by using the applied power, an output unit to output a sum of the first output power and the second output power, and a controller to control an interleaving operations between the first module and the second module.Type: ApplicationFiled: July 1, 2013Publication date: April 17, 2014Inventors: Woo Sup KIM, Jae Ho LEE, Chun Suk YANG, Seoung Woon LEE, Bo Hyung CHO
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Publication number: 20130307333Abstract: Disclosed is an inverter-charger combined device for electric vehicles configured to drive a 3-phase motor by charging a high voltage battery in case of charging mode, and switching a power of the high voltage battery in case of operation mode, the device including a first power supply unit for supplying a power to drive a switching unit of the rectifier, and a second power supply unit for supplying a power to drive a switching unit of the inverter, where the first power supply unit and the second power supply unit are configured to independently supply a power.Type: ApplicationFiled: May 14, 2013Publication date: November 21, 2013Applicant: LSIS CO., LTD.Inventors: Byung Woon JANG, Chun Suk YANG
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Publication number: 20120326674Abstract: Provided are a switching device for an electric vehicle and a method of controlling the switching device. The switching device includes a switch, a signal selection part, an inverter, and a controller. The switch generates a first or second switching signal according to an operation mode. The signal selection part receives the first or second switching signal, and selects the first or second switching signal according to the operation mode to output the selected switching signal. The inverter performs a direct current/alternating current conversion process on power according to the switching signal output from the signal selection part, and outputs the power. The controller determines the operation mode, and generates a control signal according to the operation mode such that the signal selection part selects the first or second switching signal.Type: ApplicationFiled: June 19, 2012Publication date: December 27, 2012Applicant: LSIS CO., LTD.Inventors: Chun Suk YANG, Byung Woon JANG
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Publication number: 20110181236Abstract: Disclosed is a charger including a first rectifying portion that rectifies an alternating power and outputs the rectified power to a neutral point of a 3-phase motor; a second rectifying portion/inverter that charges output power of the first rectifying portion in a high-voltage battery in a charging mode and drives the 3-phase motor by switching the charged power of the high-voltage battery in a drive mode; a high-voltage charging controller that controls the first rectifying portion and second rectifying portion/inverter so as to charge the high-voltage battery in the charging mode; and a DSP (Digital Signal Processor) that controls the second rectifying portion/inverter so as to drive the 3-phase motor in the drive mode, and controls the high-voltage charging controller so as to charge the high-voltage battery in the charging mode.Type: ApplicationFiled: January 24, 2011Publication date: July 28, 2011Inventors: Chun Suk YANG, Jae Ho Lee
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Publication number: 20100231164Abstract: An electric vehicle charging system is disclosed, wherein the electric vehicle charging system comprises: a station battery bank storing electric energy; a station battery charging unit changing an AC signal to a DC signal that is supplied for the station battery bank; and a vehicle charging unit charging an electric vehicle with the DC signal from the station battery bank.Type: ApplicationFiled: June 9, 2009Publication date: September 16, 2010Inventor: Chun Suk Yang