Patents by Inventor Jae-Sam Lee
Jae-Sam Lee 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: 11949271Abstract: An embodiment of the present invention provides a load sharing control device included in each of multiple power supply devices connected to a load in parallel, the load sharing control device comprising: a first control unit for generating a first control signal which controls an output current of a power supply device, by using the output current of the power supply device and a current of a load share bus; and a second control unit for generating a second control signal which controls an output voltage of the power supply device, by using a target voltage of the power supply device, a feedback voltage received as feedback from the output voltage of the power supply device, and a control voltage according to the first control signal of the first control unit, wherein the first control unit generates the first control signal so that the output current is identical to the current of the load share bus, and limits the output current to a threshold current or less.Type: GrantFiled: April 6, 2021Date of Patent: April 2, 2024Assignee: LG INNOTEK CO., LTD.Inventor: Jae Sam Lee
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Publication number: 20230155406Abstract: An embodiment of the present invention provides a load sharing control device included in each of multiple power supply devices connected to a load in parallel, the load sharing control device comprising: a first control unit for generating a first control signal which controls an output current of a power supply device, by using the output current of the power supply device and a current of a load share bus; and a second control unit for generating a second control signal which controls an output voltage of the power supply device, by using a target voltage of the power supply device, a feedback voltage received as feedback from the output voltage of the power supply device, and a control voltage according to the first control signal of the first control unit, wherein the first control unit generates the first control signal so that the output current is identical to the current of the load share bus, and limits the output current to a threshold current or less.Type: ApplicationFiled: April 6, 2021Publication date: May 18, 2023Applicant: LG INNOTEK CO., LTD.Inventor: Jae Sam LEE
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Patent number: 10020749Abstract: The present invention relates to a power converter including a transformer; a current doubler including a switch element and connected to a secondary side of the transformer to double a current of the transformer according to an operation of the switch element; and a voltage resonator connected to the switch elements, wherein the voltage resonator includes a switch element and a capacitor which are connected to each other in series.Type: GrantFiled: August 24, 2015Date of Patent: July 10, 2018Assignee: LG INNOTEK CO., LTD.Inventors: Chunfeng Jin, Joo Suk Kang, Jae Sam Lee, Jung Hwan Choi, Dong Young Huh
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Patent number: 9899935Abstract: According to one embodiment of the present invention, when a power supply device including first and second amplification units which share an energy storage element is used, it is possible to reduce voltage stress on a semiconductor device and to consistently maintain voltages output to the first and second amplification units by independently adjusting the amplification rates of the first and second amplification units.Type: GrantFiled: August 7, 2014Date of Patent: February 20, 2018Assignee: LG INNOTEK CO., LTD.Inventors: Jae Sam Lee, Dong Young Huh
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Patent number: 9893608Abstract: According to one embodiment of the present invention, when a power supply device having first and second amplification units which share an energy storage element is used, it is possible to reduce voltage stress of a semiconductor device and to consistently maintain output voltage outputted to the first and second amplification units while individually adjusting the amplification rates of the first and second amplification units.Type: GrantFiled: August 12, 2014Date of Patent: February 13, 2018Assignee: LG INNOTEK CO., LTD.Inventors: Dong Gyun Kim, Dong Young Huh, Jae Sam Lee
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Publication number: 20170317601Abstract: The present invention relates to a power converter including a transformer; a current doubler including a switch element and connected to a secondary side of the transformer to double a current of the transformer according to an operation of the switch element; and a voltage resonator connected to the switch elements, wherein the voltage resonator includes a switch element and a capacitor which are connected to each other in series.Type: ApplicationFiled: August 24, 2015Publication date: November 2, 2017Applicant: LG INNOTEK CO., LTD.Inventors: Chunfeng JIN, Joo Suk KANG, Jae Sam Lee, Jung Hwan Choi, Dong Young Huh
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Patent number: 9748855Abstract: A bidirectional DC-DC converter is disclosed. According to the bidirectional DC-DC converter, switching loss is reduced by implementing zero voltage switching of switching devices in a boost mode of the bidirectional DC-DC converter. Accordingly, it is possible to realize the high efficiency of power conversion. Further, switching devices of the bidirectional DC-DC converter are controlled using simple logic devices, thereby controlling a plurality of directional DC-DC converters coupled in parallel to each other.Type: GrantFiled: May 19, 2016Date of Patent: August 29, 2017Assignee: LG INNOTEK CO., LTD.Inventor: Jae Sam Lee
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Patent number: 9684320Abstract: A DC/DC converter includes n converters connected in parallel to each other and configured to adjust a level of an input voltage according to a duty ratio of a first pulse signal applied to a first switch device to output an output voltage, wherein the n is an integer of 2 or more; and a control unit configured to compare an average of n sensing currents with the n sensing currents sensed from the converters, respectively, to adjust the duty ratio of the first pulse signal.Type: GrantFiled: April 14, 2015Date of Patent: June 20, 2017Assignee: LG INNOTEK CO., LTD.Inventors: Bum Su Shin, Jae Sam Lee
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Publication number: 20160344297Abstract: A bidirectional DC-DC converter is disclosed. According to the bidirectional DC-DC converter, switching loss is reduced by implementing zero voltage switching of switching devices in a boost mode of the bidirectional DC-DC converter. Accordingly, it is possible to realize the high efficiency of power conversion. Further, switching devices of the bidirectional DC-DC converter are controlled using simple logic devices, thereby controlling a plurality of directional DC-DC converters coupled in parallel to each other.Type: ApplicationFiled: May 19, 2016Publication date: November 24, 2016Inventor: Jae Sam Lee
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Patent number: 9490708Abstract: Disclosed are a multiple-output DC/DC converter and a power supply having the same. The multiple-output DC/DC converter includes a converter including a transformer and a first surge absorbing module, wherein the transformer includes a first switch provided to a primary side and outputs a first voltage to a secondary side, and the first surge absorbing module is connected to the primary side of the transformer and absorbs a surge voltage formed at the first switch by a leakage inductance of the transformer; and a first energy converting module to receive output energy supplied from the first surge absorbing module and output a second voltage.Type: GrantFiled: December 15, 2014Date of Patent: November 8, 2016Assignee: LG Innotek Co., Ltd.Inventors: Chunfeng Jin, Dong Young Huh, Jae Sam Lee, Hyun Woo Lee, Jung Hwan Choi
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Publication number: 20160204694Abstract: According to one embodiment of the present invention, when a power supply device having first and second amplification units which share an energy storage element is used, it is possible to reduce voltage stress of a semiconductor device and to consistently maintain output voltage outputted to the first and second amplification units while individually adjusting the amplification rates of the first and second amplification units.Type: ApplicationFiled: August 12, 2014Publication date: July 14, 2016Inventors: Dong Gyun KIM, Dong Young HUH, Jae Sam LEE
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Publication number: 20160190952Abstract: According to one embodiment of the present invention, when a power supply device including first and second amplification units which share an energy storage element is used, it is possible to reduce voltage stress on a semiconductor device and to consistently maintain voltages output to the first and second amplification units by independently adjusting the amplification rates of the first and second amplification units.Type: ApplicationFiled: August 7, 2014Publication date: June 30, 2016Inventors: Jae Sam LEE, Dong Young HUH
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Publication number: 20160054785Abstract: A power control apparatus of an energy storage system and method of controlling the power control apparatus are provided. The power control apparatus includes a battery manager to monitor a charge state of at least one battery module and to manage charge and discharge of the at least one battery module, a power converter to convert power of the at least one battery module from alternating current (AC) to direct current (DC) or from DC to AC, a controller configured to control the battery manager and the power converter, and a standby power supplier configured to supply constant power to the battery manager, the power converter, and the controller when the battery manager is not driven.Type: ApplicationFiled: January 13, 2015Publication date: February 25, 2016Applicant: LG CNS CO., LTD.Inventors: Byeong Kueon CHOI, Dong Chul KO, Sang Hyub KIM, Tae Hyoung RYU, Byoung Seung LEE, Min Seok CHOI, Jae Sam LEE, Hyung Jun CHAE
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Publication number: 20150338862Abstract: A DC/DC converter includes n converters connected in parallel to each other and configured to adjust a level of an input voltage according to a duty ratio of a first pulse signal applied to a first switch device to output an output voltage, wherein the n is an integer of 2 or more; and a control unit configured to compare an average of n sensing currents with the n sensing currents sensed from the converters, respectively, to adjust the duty ratio of the first pulse signal.Type: ApplicationFiled: April 14, 2015Publication date: November 26, 2015Inventors: Bum Su SHIN, Jae Sam LEE
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Publication number: 20150171757Abstract: Disclosed are a multiple-output DC/DC converter and a power supply having the same. The multiple-output DC/DC converter includes a converter including a transformer and a first surge absorbing module, wherein the transformer includes a first switch provided to a primary side and outputs a first voltage to a secondary side, and the first surge absorbing module is connected to the primary side of the transformer and absorbs a surge voltage formed at the first switch by a leakage inductance of the transformer; and a first energy converting module to receive output energy supplied from the first surge absorbing module and output a second voltage.Type: ApplicationFiled: December 15, 2014Publication date: June 18, 2015Inventors: Chunfeng JIN, Dong Young Huh, Jae Sam Lee, Hyun Woo Lee, Jung Hwan Choi
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Patent number: 8075562Abstract: Controlled release of biopharmaceutical growth factors from a hydroxyapatite coating on a bioresorbable interference screw used in cruciate ligament reconstruction surgery on a human. Biologically active scaffolds, such as interference bone screws used for ligament fixation, made by growing calcium phosphate-based hydroxyapatite coatings on bioresorbable poly(?-hydroxy ester) scaffolds that provide controlled mineral dissolution and controlled release of bone morphogenetic protein-2. The biologically active scaffold provides improved bioavailability of BMP-2 growth factor that in turn provides enhanced graft-bone healing in the tibial bone tunnel. The coating method uses surface hydrolysis and modified simulated body fluid incubation which does not require solvent or heat and is conducted at room temperature.Type: GrantFiled: June 25, 2008Date of Patent: December 13, 2011Assignee: Wisconsin Alumni Research FoundationInventors: William L. Murphy, Jae-Sam Lee, Mark D. Markel, Ben K. Graf
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Publication number: 20090087472Abstract: Controlled release of biopharmaceutical growth factors from a hydroxyapatite coating on a bioresorbable interference screw used in cruciate ligament reconstruction surgery on a human. Biologically active scaffolds, such as interference bone screws used for ligament fixation, made by growing calcium phosphate-based hydroxyapatite coatings on bioresorbable poly(?-hydroxy ester) scaffolds that provide controlled mineral dissolution and controlled release of bone morphogenetic protein-2. The biologically active scaffold provides improved bioavailability of BMP-2 growth factor that in turn provides enhanced graft-bone healing in the tibial bone tunnel. The coating method uses surface hydrolysis and modified simulated body fluid incubation which does not require solvent or heat and is conducted at room temperature.Type: ApplicationFiled: June 25, 2008Publication date: April 2, 2009Inventors: William L. Murphy, Jae-Sam Lee, Mark D. Markel, Ben K. Graf