Patents by Inventor Gyu-Yeong Choe

Gyu-Yeong Choe 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).

  • Publication number: 20210178919
    Abstract: Disclosed is a power factor correction circuit including a plurality of legs connected in parallel and each including two switching devices connected in series, a plurality of inductors each having one terminal connected to an interconnection node of the two switching devices in a corresponding one of the legs, and a controller configured to control on/off states of the switching devices in a pulse width modulation manner such that each of the inductors is built up twice or more in one switching period of the switching devices when an alternating current (AC) voltage is input to the other terminal of each of the inductors.
    Type: Application
    Filed: July 8, 2020
    Publication date: June 17, 2021
    Inventors: In Yong Yeo, Woo Young Lee, Gyu Yeong Choe, Jin Young Yang, Ji Han Lee, Si Hun Yang, Young Jin Kim, Min Seong Choi, Jong Pil Kim
  • Patent number: 10974608
    Abstract: A method for selectively performing a full bridge control and a half bridge control in a WPT system using an LCCL-S resonant network may include: performing the full bridge control by controlling the switches not connected in series of the full bridge inverter to operate simultaneously; calculating a coupling coefficient of the WPT system; determining whether it is possible to switch the full bridge control to the half bridge control based on the calculated coupling coefficient; in response to determining that it is possible to switch the full bridge control to the half bridge control, calculating a load of the WPT system; and performing the half bridge control for the full bridge inverter based on the calculated load.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: April 13, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Jae Eun Cha, Gyu Yeong Choe, Woo Young Lee, Jong Eun Byun, Min Kook Kim, Sang Joon Ann, Byoung Kuk Lee, Dong Myoung Joo
  • Patent number: 10971998
    Abstract: A charging apparatus for an electric vehicle is provided. The apparatus includes an AC power input terminal receiving one AC input power from among single-phase AC power and multi-phase AC power. A power factor corrector having full bridge circuits receives the AC input power through the AC power input terminal. A link capacitor is charged through the power factor corrector. A first switch connects any one of an AC power input line and a neutral line of the AC power input terminal to the power factor corrector and a second switch selectively connects the AC power input terminal to the power factor corrector, or the link capacitor. The power factor corrector and the switch network operate based on a condition of received AC input power. The second switch includes a third switch and a fourth switch that connect each full bridge circuit to a positive battery electrode.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: April 6, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jongpil Kim, Woo Young Lee, Gyu Yeong Choe, Hyun-Wook Seong, JinYoung Yang, Jung Hong Joo, DongGyun Woo, Dong Sup Ahn, Hyung Bin Ihm, Youngkook Lee, Jin Hwan Jung, SeungHyun Han, Sihun Yang
  • Patent number: 10960778
    Abstract: A wireless power reception apparatus including a bridgeless rectifier in a wireless power transfer (WPT) system for an electric vehicle (EV) may include: a bridgeless rectifier configured to rectify power transferred from a reception coil and to supply a direct current to a battery mounted in the EV; and a controller configured to control operation of the bridgeless rectifier. The bridgeless rectifier may include at least one switch and at least one diode connected to the at least one switch.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: March 30, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Woo Young Lee, Jae Eun Cha, Gyu Yeong Choe, Jong Pil Kim, Min Jung Kim, Jong Eun Byun, Min Kook Kim, Sang Joon Ann, Byoung Kuk Lee
  • Patent number: 10862539
    Abstract: A reception pad for a wireless power transfer (WPT) system includes: a plate-shaped ferrite; an insulating layer disposed on one side of the ferrite; a first coil layer disposed on the insulating layer; an interlayer insulating layer disposed on the first coil layer; and a second coil layer disposed on the interlayer insulating layer. The insulating layer at least partially surrounds the first coil layer and the second coil layer, the first coil layer and the second coil layer at least partially overlap each other and are arranged in a rectangular ring form on the one side of the ferrite, and a ratio of a width which is larger between a first width of the first coil layer and a second width of the second coil layer to a first length of the ferrite in a width direction corresponding to the first width or the second width is 0.14 to 0.15.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: December 8, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Woo Young Lee, Gyu Yeong Choe, Min Jung Kim, Min Kook Kim, Jong Eun Byeon, Min Hyuck Kang, Dong Gyun Woo, Byoung Kuk Lee, Dong Myoung Joo
  • Patent number: 10840820
    Abstract: An integrated converter is provided. The integrated converter includes a high-voltage charger having a power factor correction (PFC) device configured to compensate a low-frequency ripple and convert an alternating current (AC) voltage of a commercial power source into a direct current (DC) voltage. A first switching module is configured to convert the DC voltage output from the PFC device into an AC voltage and charge a high-voltage battery using the commercial power source and a low-voltage charger that is connected between the PFC device and the first switching module and the high-voltage charger configured to charge a low-voltage battery using the commercial power source or the high-voltage battery.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: November 17, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jin Young Yang, Gyu Yeong Choe, Min Seong Choi, Tae Jong Ha, Young Jin Kim, Jae Eun Cha, Dae Woo Lee, In Yong Yeo
  • Patent number: 10819162
    Abstract: A method for detecting a foreign object between a transmission pad and a reception pad for wireless power transfer (WPT) may comprise steps of performing a zero phase angle (ZPA) control for a power transfer converter included in or connected to the transmission pad; detecting a characteristic parameter with respect to at least one of an input current and a switching frequency of the power transfer converter; and determining whether or not a foreign object exists between the transmission pad and the reception pad according to whether the characteristic parameter with respect to at least one of the input current and the switching frequency deviates from an allowable range.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 27, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Woo Young Lee, Gyu Yeong Choe, Jae Eun Cha, Byoung Kuk Lee, Min Kook Kim, Min Jung Kim, Dong Myoung Joo, Jong Eun Byun
  • Publication number: 20200336080
    Abstract: An integrated converter is provided. The integrated converter includes a high-voltage charger having a power factor correction (PFC) device configured to compensate a low-frequency ripple and convert an alternating current (AC) voltage of a commercial power source into a direct current (DC) voltage. A first switching module is configured to convert the DC voltage output from the PFC device into an AC voltage and charge a high-voltage battery using the commercial power source and a low-voltage charger that is connected between the PFC device and the first switching module and the high-voltage charger configured to charge a low-voltage battery using the commercial power source or the high-voltage battery.
    Type: Application
    Filed: July 22, 2019
    Publication date: October 22, 2020
    Inventors: Jin Young Yang, Gyu Yeong Choe, Min Seong Choi, Tae Jong Ha, Young Jin Kim, Jae Eun Cha, Dae Woo Lee, In Yong Yeo
  • Patent number: 10804749
    Abstract: A method for detecting a foreign object between a transmission pad and a reception pad for wireless power transfer (WPT) may comprise: performing, by a processor, a zero phase angle (ZPA) control for a power transfer converter included in or connected to the transmission pad; detecting, by the processor, a phase difference between an input current and an input voltage of the power transfer converter; and determining, by the processor, whether or not the foreign object exists between the transmission pad and the reception pad by comparing the phase difference with a reference value.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: October 13, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkukwan University
    Inventors: Woo Young Lee, Gyu Yeong Choe, Jae Eun Cha, Min Jung Kim, Byoung Kuk Lee, Min Kook Kim, Sang Joon Ann, Jong Eun Byun
  • Patent number: 10661660
    Abstract: A vehicle charging system includes a power transmitter including at least one voltage converter configured to allow a vehicle charging mode to be changed by a plurality of switches and a magnetic field generator configured to generate a magnetic field corresponding to a voltage converted by the voltage converter; and a power receiver including a current inductor configured to allow an electrical signal to be induced by the magnetic field generated by the magnetic field generator, a rectifier configured to rectify the induced electrical signal and a battery configured to be charged by the electrical signal rectified by the rectifier.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: May 26, 2020
    Assignees: Hyundai Motor Company, Kia Motor Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Woo Young Lee, Byeong Seob Song, JaeEun Cha, Gyu Yeong Choe, Minjung Kim, Jongeun Byun, Minkook Kim, Dongmyoung Joo, Sangjoon Ann, Byoung Kuk Lee
  • Patent number: 10640001
    Abstract: A wireless power transfer (WPT) method for an electric vehicle (EV) may include a vehicle controller or a vehicle assembly (VA) controller connected to the vehicle controller performing communications, for charging of a battery of the EV, with a ground assembly (GA) controller of a charger connected to a primary coil or a primary pad located outside the EV; and connecting the battery to a field winding of a driving motor of the EV before starting the WPT. The battery is charged by a power magnetically induced at the field winding from the primary coil.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: May 5, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Bum Sik Kim, Jin Hwan Jung, Hyeon Uk Kim, Ki Young Jang, Gyu Yeong Choe
  • Patent number: 10516297
    Abstract: A wireless power transmission pad for transmitting wireless power to a reception pad including a secondary coil includes: a rectangular-shaped primary coil having an X-width defined in an x-direction and a Y-width defined in a y-direction and having a central space; a ferrite coupled to the primary coil; and a housing supporting the primary coil and the ferrite. A first cross-sectional area of a first portion including the X-width of the primary coil is smaller than a second cross-sectional area of a second portion including the Y-width of the primary coil.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: December 24, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Woo Young Lee, Gyu Yeong Choe, Byoung Kuk Lee, Min Kook Kim, Dong Myoung Joo, Jong Eun Byeon, Min Hyuck Kang, Dong Gyun Woo, Min Jung Kim
  • Publication number: 20190366866
    Abstract: A method for controlling wireless power transfer to an EV using a bridgeless rectifier may include detecting a phase difference between an input voltage of a transmission-side resonance circuit and an output voltage of a reception-side resonance circuit; after detecting the phase difference, predicting a resonance frequency change direction according to a preconfigured design condition; and controlling switching time points of switches included in the bridgeless rectifier in a direction compensating for the predicted change direction.
    Type: Application
    Filed: May 30, 2019
    Publication date: December 5, 2019
    Inventors: Jae Eun Cha, Woo Young Lee, Gyu Yeong Choe, Byoung Kuk Lee, Jong Eun Byun, Sang Joon Ann, Won Jin Son, Jae Han Lee
  • Publication number: 20190366857
    Abstract: A method for performing switching synchronization of a bridgeless rectifier in an electric vehicle (EV) wireless power transfer system may include receiving, by an EV control module, an input voltage of a transmission-side resonance circuit from a transmission-side of the EV wireless power transfer system; calculating, by the EV control module, a phase difference between the received input voltage and a voltage or a current selected in the bridgeless rectifier and a reception-side resonance circuit; and controlling, by an EV control module, switching time points of switches included in the bridgeless rectifier to decrease the calculated phase difference. The reception-side resonance circuit may be electromagnetically coupled to the transmission-side resonance circuit, and the bridgeless rectifier may be configured to rectify an output of the reception-side resonance circuit and to output the rectified output.
    Type: Application
    Filed: May 31, 2019
    Publication date: December 5, 2019
    Inventors: Jae Eun Cha, Woo Young Lee, Gyu Yeong Choe, Byoung Kuk Lee, Jong Eun Byun, Sang Joon Ann, Won Jin Son, Jae Han Lee
  • Publication number: 20190312509
    Abstract: A charging apparatus for an electric vehicle is provided. The apparatus includes an AC power input terminal receiving one AC input power from among single-phase AC power and multi-phase AC power. A power factor corrector having full bridge circuits receives the AC input power through the AC power input terminal. A link capacitor is charged through the power factor corrector. A first switch connects any one of an AC power input line and a neutral line of the AC power input terminal to the power factor corrector and a second switch selectively connects the AC power input terminal to the power factor corrector, or the link capacitor. The power factor corrector and the switch network operate based on a condition of received AC input power. The second switch includes a third switch and a fourth switch that connect each full bridge circuit to a positive battery electrode.
    Type: Application
    Filed: December 10, 2018
    Publication date: October 10, 2019
    Inventors: Jongpil Kim, Woo Young Lee, Gyu Yeong Choe, Hyun-Wook Seong, JinYoung Yang, Jung Hong Joo, DongGyun Woo, Dong Sup Ahn, Hyung Bin Ihm, Youngkook Lee, Jin Hwan Jung, SeungHyun Han, Sihun Yang
  • Patent number: 10439446
    Abstract: A foreign object detection apparatus using a mobile laser in a wireless power transfer (WPT) system may comprise a laser transmitting part installed on one side of an upper portion of a transmission pad to generate a laser; a laser receiving part installed on an opposite side to the one side, and receiving the laser generated by the laser transmitting part; and a laser moving part for moving the laser transmitting part and the laser receiving part along the one side or the opposite side of the transmission pad.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: October 8, 2019
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Jae Eun Cha, Gyu Yeong Choe, Woo Young Lee, Byoung Kuk Lee, Min Jung Kim, Min Kook Kim, Jong Eun Byun, Sang Joon Ann
  • Publication number: 20190283615
    Abstract: A wireless power reception apparatus including a bridgeless rectifier in a wireless power transfer (WPT) system for an electric vehicle (EV) may include: a bridgeless rectifier configured to rectify power transferred from a reception coil and to supply a direct current to a battery mounted in the EV; and a controller configured to control operation of the bridgeless rectifier. The bridgeless rectifier may include at least one switch and at least one diode connected to the at least one switch.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 19, 2019
    Inventors: Woo Young Lee, Jae Eun Cha, Gyu Yeong Choe, Jong Pil Kim, Min Jung Kim, Jong Eun Byun, Min Kook Kim, Sang Joon Ann, Byoung Kuk Lee
  • Patent number: 10411515
    Abstract: A primary coil circuit of a ground assembly for wirelessly transferring power to a secondary coil includes: a primary coil magnetically coupled to the secondary coil and having a first terminal and a second terminal; a second capacitor having a first terminal and a second terminal connected to the first terminal of the primary coil; a first inductor having a first terminal coupled to a first input terminal of a power source and a second terminal coupled to the first terminal of the second capacitor; and a first capacitor having a first terminal coupled commonly to the second terminal of the first inductor and the first terminal of the second capacitor and a second terminal coupled commonly to the second terminal of the primary coil and a second input terminal of the power source.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: September 10, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Research & Business Foundation Sungkyunkwan University
    Inventors: Woo Young Lee, Gyu Yeong Choe, Min Jung Kim, Min Kook Kim, Jong Eun Byeon, Min Hyuck Kang, Dong Gyun Woo, Byoung Kuk Lee, Dong Myoung Joo
  • Patent number: 10389178
    Abstract: Disclosed are DC-to-AC converter control methods, ground assemblies and wireless power transfer methods using the same. A method for controlling a DC-to-AC converter of a ground assembly used for wireless power transfer, which includes first, second, third, and fourth switches arranged in a form of a bridge circuit between a power source and a primary coil, may comprise detecting a current flowing through the primary coil at a rising edge of an output voltage signal of the DC-to-AC converter; determining whether a strength of the current is at a negative level which falls within a predetermined reference range; and in response to a determination that the current is not at the negative level, changing switching frequencies of the DC-to-AC converter.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: August 20, 2019
    Assignee: Hyundai Motor Company
    Inventors: Woo Young Lee, Hyun Wook Seong, Gyu Yeong Choe
  • Patent number: 10377250
    Abstract: A system and a method of controlling charge of a vehicle battery are provided. In particular, when a voltage of the vehicle battery is different from an output voltage of a commercially available quick charger, a compatibility problem is solved through a converter, thereby allowing an inverter, an electric motor, and a connector to have an increased efficiency and to maximize a reduction in size, weight, and material cost thereof.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: August 13, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Woo Young Lee, Jin Hwan Jung, Young Jin Kim, Dong Sup Ahn, Byeong Seob Song, Gyu Yeong Choe