Patents by Inventor Yong Cheol Kang
Yong Cheol Kang 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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Publication number: 20240105938Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present disclosure includes first lithium metal phosphate particles, each first lithium metal phosphate particle having a secondary particle shape formed by aggregation of primary particles and having an average particle diameter (D50) in a range from 5 ?m to 10 ?m, second lithium metal phosphate particles, each having a single particle and having an average particle diameter in a range from 1 ?m to 3 ?m, and third lithium metal phosphate particles, each having a single particle shape and having an average particle diameter less than 1 ?m.Type: ApplicationFiled: March 24, 2023Publication date: March 28, 2024Inventors: Min Suk KANG, Ji Yae DO, Min Cheol BEAK, Sang Wook LEE, Yong Hyun CHO
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Patent number: 11942264Abstract: A coil component includes a body having a first surface, and a first end surface and a second end surface connected to the first surface and opposing each other in a length direction; a support substrate disposed inside the body; a coil portion comprising a first coil pattern and first and second lead-out patterns, each disposed on a first surface of the support substrate; first and second slit portions, respectively defined on edge portions of the first surface of the body to expose the first and second lead-out patterns; and first and second external electrodes disposed on the first and second slit portions to be connected to the first and second lead-out patterns. At least one of the first and second lead-out patterns has a thickness greater than a thickness of each of the first coil pattern and the first dummy lead-out pattern.Type: GrantFiled: December 8, 2020Date of Patent: March 26, 2024Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: No Il Park, Byung Soo Kang, Seung Mo Lim, Byeong Cheol Moon, Boum Seock Kim, Yong Hui Li, Seung Min Lee
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Publication number: 20240092943Abstract: The present invention provides a high-purity glucose-based compound ultra-highly substituted with a biopolymer, in which a surface of a glucose-based compound as a natural material is ultra-highly modified with a biopolymer to improve compatibility and dispersibility with biodegradable polymers, thereby significantly improving the mechanical properties of the biodegradable polymer composite.Type: ApplicationFiled: October 26, 2023Publication date: March 21, 2024Applicant: Foundation of Soongsil University-Industry CooperationInventors: Jae Woo Chung, Hee Cheol Kang, Yong Jun Chang, Jae Woo Lee
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Patent number: 11928070Abstract: A peripheral component interconnect express (PCIe) device includes a common function performing operations associated with a PCIe interface according to a function type, the common function being programmable to be a function type selected from a plurality function types, an access identification information controller generating first access identification information for allowing an access to the common function, and providing the first access identification information to an assigned system image to which the common function has been assigned, a data packet receiver receiving a data packet including target identification information indicating a target system image from the target system image, and an access allowance determiner determining whether or not to allow the target system image to access the common function based on the first access identification information and the target identification information.Type: GrantFiled: October 20, 2021Date of Patent: March 12, 2024Assignee: SK hynix Inc.Inventors: Yong Tae Jeon, Byung Cheol Kang, Seung Duk Cho, Sang Hyun Yoon, Se Hyeon Han, Jae Young Jang
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Patent number: 11922577Abstract: An online fitting method and apparatus receive, from a user, a body size of the user and a target size of clothes desired by the user for fitting, obtain barycentric coordinate information corresponding to a result of fitting the clothes of the target size to a reference avatar selected based on the body size of the user, generate a target avatar having the same mesh topology as the reference avatar and corresponding to the body size of the user, fit the clothes to the target avatar by applying the barycentric coordinate information to the target avatar, and display a result of fitting the clothes to the target avatar.Type: GrantFiled: November 3, 2021Date of Patent: March 5, 2024Assignee: CLO VIRTUAL FASHION INC.Inventors: Keu Cheol Kang, In Yong Jeon, Seung Woo Oh
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Patent number: 11915853Abstract: A coil component is provided. The coil component includes a body having fifth and sixth surfaces opposing each other, first and second surfaces respectively connecting the fifth and sixth surfaces of the body and opposing each other, and third and fourth surfaces respectively connecting the first and second surfaces of the body and opposing each other in one direction, a recess disposed in an edge between one of the first and second surfaces of the body and the sixth surface of the body, a coil portion disposed inside the body and exposed through the recess, and an external electrode including a connection portion disposed in the recess and connected to the coil portion, and a pad portion disposed on one surface of the body. A length of the pad portion in the one direction is greater than a length of the connection portion in the one direction.Type: GrantFiled: November 6, 2020Date of Patent: February 27, 2024Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seung Mo Lim, Seung Min Lee, Byeong Cheol Moon, Yong Hui Li, Byung Soo Kang, Ju Hwan Yang, Tai Yon Cho, No Il Park, Tae Jun Choi
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Publication number: 20170115685Abstract: An output power control method of a wind generator includes: when a disturbance occurs, increasing output power of the wind generator by adding the active power proportional to kinetic energy stored in the wind generator at the instant of a disturbance, wherein the increasing of output power calculates an increment of the output power by using a mechanical input curve and an electrical output curve at a corresponding wind speed of the wind generator, and the increment of the output power is determined as a constant which makes the mechanical input curve of the wind generator and the electrical output curve intersect at least at one point according to each input wind speed, and when an intersection determined above is formed at a rotor speed lower than ?min, the increment of the output power is determined as a maximum constant value which makes the rotor speed reach a predetermined point.Type: ApplicationFiled: July 6, 2015Publication date: April 27, 2017Inventors: Yong Cheol KANG, Mo Se KANG, Jin Shik LEE
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Publication number: 20160233769Abstract: A three-level SEPIC converter circuit includes: an input inductor connected to one side of an input terminal; first and second switches connected between the input inductor and the other side of the input terminal in series; a first capacitor and a first diode connected between the first switch and one side of an output terminal in series; a second diode and a second capacitor connected between the other side of the output terminal and the other side of the input terminal in series; first and second output capacitors connected between the output terminals; and an output inductor connected between a node between the first capacitor and the first diode and a node between the second capacitor and the second diode, wherein a node between the first switch and the second switch and a node between the first output capacitor and the second output capacitor are connected.Type: ApplicationFiled: June 25, 2015Publication date: August 11, 2016Inventors: Woo-Young CHOI, Yong Cheol KANG
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Publication number: 20160040653Abstract: An inertial control method of a wind turbine includes the steps of: acquiring frequency information of a power grid; calculating a time variant droop coefficient when the frequency information is reduced below a preset range; and controlling the wind turbine using the calculated time variant droop coefficient, wherein the step of calculating a time variant droop coefficient includes the steps of: collecting rotor speed information changing according to the inertial control; and calculating the time variant droop coefficient using the collected rotor speed information.Type: ApplicationFiled: January 4, 2015Publication date: February 11, 2016Inventors: Yong Cheol KANG, Jinsik LEE, Jinho KIM
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Patent number: 9217419Abstract: A system and method for controlling voltage at a point of common coupling of a wind farm including a plurality of wind turbines is provided. The method includes: calculating a first voltage error value, which is a difference between a reference voltage value of the point of common coupling and an actual voltage value of the point of common coupling; calculating a compensation reference voltage value based on the first voltage error value; calculating a second voltage error value by subtracting a voltage value of an output terminal of a wind turbine from a sum of a reference voltage value of the wind turbine and the compensation reference voltage value; calculating a reactive power compensation value corresponding to the second voltage error value; and injecting a reactive current corresponding to the reactive current compensation value into a power grid.Type: GrantFiled: January 6, 2015Date of Patent: December 22, 2015Assignee: INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITYInventors: Yong Cheol Kang, Jinho Kim, Geon Park
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Publication number: 20150337808Abstract: A system and method for controlling voltage at a point of common coupling of a wind farm including a plurality of wind turbines is provided. The method includes: calculating a first voltage error value, which is a difference between a reference voltage value of the point of common coupling and an actual voltage value of the point of common coupling; calculating a compensation reference voltage value based on the first voltage error value; calculating a second voltage error value by subtracting a voltage value of an output terminal of a wind turbine from a sum of a reference voltage value of the wind turbine and the compensation reference voltage value; calculating a reactive power compensation value corresponding to the second voltage error value; and injecting a reactive current corresponding to the reactive current compensation value into a power grid.Type: ApplicationFiled: January 6, 2015Publication date: November 26, 2015Inventors: Yong Cheol KANG, Jinho KIM, Geon PARK
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Patent number: 9054576Abstract: A high efficiency DC/DC converter with high conversion ratio is provided. The DC/DC converter includes a power switch for selectively switching an electrical connection between one side of a power supply and anodes of a first diode and a second diode, a first capacitive element whose one side is connected to a cathode of the first diode, a second capacitive element whose one side is connected to a cathode of the second diode, a first-first switch for selectively switching an electrical connection between the other side of the first capacitive element and the other side of the power supply, and a second-first switch for selectively switching an electrical connection between the other side of the first capacitive element and one side of the second capacitive element.Type: GrantFiled: October 11, 2012Date of Patent: June 9, 2015Assignee: INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERISITYInventors: Yong Cheol Kang, Jul Ki Seok, Ali Gandomkar
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Patent number: 8922043Abstract: A time variant droop-based inertial control method of a wind generator includes the steps of acquiring a nominal frequency value and a system frequency value of a power system; calculating a difference between the system frequency value and the nominal frequency value; calculating a rate of change of the system frequency; acquiring a droop coefficient Rvariant using the rate of change of the system frequency; and controlling the wind generator based on the difference between the system frequency value and the nominal frequency value and the droop coefficient Rvariant.Type: GrantFiled: July 2, 2014Date of Patent: December 30, 2014Assignee: Industrial Cooperation Foundation Chonbuk National UniversityInventors: Yong Cheol Kang, Hyewon Lee, Min Hwang
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Publication number: 20140375054Abstract: The present invention relates to a method of controlling a wind farm. A method of controlling inertia in a wind farm includes obtaining information about the frequency of an electrical grid which has been received from the electrical grid or calculated using the voltage of the wind turbine, receiving information about the rotor speed of the wind turbine, calculating the kinetic energy of the wind turbine using the information about the rotor speed, calculating an individual droop coefficient of the wind turbine using the calculated kinetic energy, and controlling the wind turbine using the calculated droop coefficient.Type: ApplicationFiled: October 28, 2013Publication date: December 25, 2014Applicant: INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITYInventors: Yong Cheol KANG, Doo Yeon KIM, Jin Shik LEE, Yeon Hee KIM, Jin Ho KIM
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Publication number: 20140055118Abstract: A high efficiency DC/DC converter with high conversion ratio is provided. The DC/DC converter includes a power switch for selectively switching an electrical connection between one side of a power supply and anodes of a first diode and a second diode, a first capacitive element whose one side is connected to a cathode of the first diode, a second capacitive element whose one side is connected to a cathode of the second diode, a first-first switch for selectively switching an electrical connection between the other side of the first capacitive element and the other side of the power supply, and a second-first switch for selectively switching an electrical connection between the other side of the first capacitive element and one side of the second capacitive element.Type: ApplicationFiled: October 11, 2012Publication date: February 27, 2014Applicant: INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITYInventors: Yong Cheol KANG, Jul Ki SEOK, Ali Gandomkar
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Patent number: 8587142Abstract: The present invention relates to a method and system for controlling a wind farm when a ramp up or ramp down rate of the wind farm does not satisfy a grid-code or corresponding criteria due to an abrupt change in wind speed. The method and system for controlling a wind farm includes the steps of measuring speed and direction of wind performed outside the wind farm, sequentially controlling wind turbines if the wind speed abruptly changes considering a time for the wind to arrive at the wind turbines, determining the number of wind turbines to be controlled simultaneously so that the wind farm may satisfy the grid-code at this point, grouping the wind turbines, determining a control sequence and a control time of each group, and adjusting a control end time if stopping times of adjacent groups are overlapped when the wind turbines are stopped.Type: GrantFiled: September 3, 2011Date of Patent: November 19, 2013Assignee: Industrial Cooperation Foundation Chonbuk National UniversityInventors: Yong Cheol Kang, Yeon Hee Kim, Tai Ying Zheng
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Publication number: 20120200086Abstract: The present invention relates to a method and system for controlling a wind farm when a ramp up or ramp down rate of the wind farm does not satisfy a grid-code or corresponding criteria due to an abrupt change in wind speed. The method and system for controlling a wind farm includes the steps of measuring speed and direction of wind performed outside the wind farm, sequentially controlling wind turbines if the wind speed abruptly changes considering a time for the wind to arrive at the wind turbines, determining the number of wind turbines to be controlled simultaneously so that the wind farm may satisfy the grid-code at this point, grouping the wind turbines, determining a control sequence and a control time of each group, and adjusting a control end time if stopping times of adjacent groups are overlapped when the wind turbines are stopped.Type: ApplicationFiled: September 3, 2011Publication date: August 9, 2012Applicant: INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITYInventors: Yong Cheol KANG, Yeon Hee KIM, Tai Ying ZHENG
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Publication number: 20110210715Abstract: Provided an error compensating method for an instrument transformer, in which an error of an instrument transformer is compensated by reflecting hysteresis characteristics of iron core. When such error compensation is performed, a hysteresis loop indicating the relationship between magnetic flux and excitation current is not used as it is, but core-loss resistances and magnetic flux-excitation current curves are used, thereby achieving more precise compensation. According to the present invention, an error of an instrument transformer can be significantly reduced. Therefore, it is possible to manufacture an instrument transformer with high accuracy and to significantly reduce the size of the instrument transformer. Further, a material with high permeability does not need to be used in order to increase the accuracy.Type: ApplicationFiled: July 27, 2006Publication date: September 1, 2011Inventors: Yong Kyun Kim, Yong Cheol Kang, Sung Il Jang
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Patent number: 7340355Abstract: Disclosed is a compensated current differential relaying method and system for protecting a transformer more correctly by calculating and estimating an exciting current including a core-loss current and a magnetizing current, and, in particular, to a compensated current differential relaying method and system which can protect the transformer correctly irrespective of the level of remanent flux.Type: GrantFiled: May 9, 2005Date of Patent: March 4, 2008Assignee: Yong-Gyun KimInventors: Yong-Cheol Kang, Sang-Hee Kang
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Publication number: 20070007943Abstract: Disclosed is a compensated current differential relaying method and system for protecting a transformer more correctly by calculating and estimating an exciting current including a core-loss current and a magnetizing current, and, in particular, to a compensated current differential relaying method and system which can protect the transformer correctly irrespective of the level of remanent flux.Type: ApplicationFiled: May 9, 2005Publication date: January 11, 2007Applicant: MYUNGJI UNIVERSITYInventors: Yong-Cheol Kang, Sang-Hee Kang