Search Patents
  • Low voltage DC-DC converter (LDC) control apparatus for preventing overheat of LDC and method of operating the same
    Patent number: 9698682
    Abstract: Disclosed are an LDC control apparatus for preventing an LDC from being overheated, and a method of operating the same. The LDC control apparatus includes a comparator configured to compare a heat release temperature of an LDC with a predetermined criterion temperature, an adjustor configured to adjust a predetermined criterion current value according to a result of the comparison of temperature, and a controller configured to compare the adjusted criterion current value with an output current value being output from the LDC, and control the LDC by converting a control mode of the LDC according to a result of the comparison of current.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: July 4, 2017
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Deok Kwan Choi
  • LOW VOLTAGE DC-DC CONVERTER (LDC) CONTROL APPARATUS FOR PREVENTING OVERHEAT OF LDC AND METHOD OF OPERATING THE SAME
    Publication number: 20160105105
    Abstract: Disclosed are an LDC control apparatus for preventing an LDC from being overheated, and a method of operating the same. The LDC control apparatus includes a comparator configured to compare a heat release temperature of an LDC with a predetermined criterion temperature, an adjustor configured to adjust a predetermined criterion current value according to a result of the comparison of temperature, and a controller configured to compare the adjusted criterion current value with an output current value being output from the LDC, and control the LDC by converting a control mode of the LDC according to a result of the comparison of current.
    Type: Application
    Filed: October 5, 2015
    Publication date: April 14, 2016
    Applicant: HYUNDAI MOBIS CO., LTD
    Inventor: Deok Kwan CHOI
  • APPARATUS FOR CONTROLLING LDC IN ELECTRIC VEHICLE
    Publication number: 20150123471
    Abstract: Embodiments provide an apparatus controlling a low voltage DC-DC converter (LDC) in an electric vehicle that enables the LDC to autonomously wake up and operate when at least one of an ignition IGN signal and other electric components linked to the LDC is in the ON state and enables the LDC to recognize that other electric components linked to the LDC are all in the OFF state, and autonomously operate in a power-off state when other electric components linked to the LDC are all in the OFF state.
    Type: Application
    Filed: August 11, 2014
    Publication date: May 7, 2015
    Applicant: LSIS CO., LTD.
    Inventors: Dong Su LEE, Woo Sup KIM
  • Inbred corn plant 90LDC2 and seeds thereof
    Patent number: 6034304
    Abstract: According to the invention, there is provided an inbred corn plant designated 90LDC2. This invention thus relates to the plants, seeds and tissue cultures of the inbred corn plant 90LDC2, and to methods for producing a corn plant produced by crossing the inbred plant 90LDC2 with itself or with another corn plant, such as another inbred. This invention further relates to corn seeds and plants produced by crossing the inbred plant 90LDC2 with another corn plant, such as another inbred, and to crosses with related species. This invention further relates to the inbred and hybrid genetic complements of the inbred corn plant 90LDC2, and also to the RFLP and genetic isozyme typing profiles of inbred corn plant 90LDC2.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: March 7, 2000
    Assignee: Dekalb Genetics Corporation
    Inventor: Francis L. Garing
  • VARIETY CORN LINE LDC6009
    Publication number: 20230148386
    Abstract: The present invention provides an inbred corn line designated LDC6009, methods for producing a corn plant by crossing plants of the inbred line LDC6009 with plants of another corn plant. The invention further encompasses all parts of inbred corn line LDC6009, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line LDC6009, and plants produced according to these methods.
    Type: Application
    Filed: November 8, 2021
    Publication date: May 11, 2023
    Applicant: SYNGENTA CROP PROTECTION AG
    Inventor: Benjamin Ford
  • METHOD AND SYSTEM FOR VARIABLY ADJUSTING VOLTAGE OF LDC FOR HYBRID VEHICLE
    Publication number: 20160121725
    Abstract: A method and system are provided for variably adjusted voltage of the LDC applied with an IBS (Intelligent Battery Sensor). The LDC output voltage control mode is determined in each of three driving modes, and the high electric loads are separated into two or more groups. The LDC output voltage value and the order priority are differentiated based on the durability of the auxiliary battery. Additionally, an LDC output voltage order table is generated according to the driving mode and the SOC state based on the auxiliary battery SOC information obtained from an IBS. Thus, consumed energy of the LDC and an energy consumption amount of the auxiliary battery are minimized, thus improving fuel efficiency.
    Type: Application
    Filed: September 22, 2015
    Publication date: May 5, 2016
    Inventors: Dong Jun Shin, Yong Kak Choi, Soung Han Noh, Hwan Hwang, Jun Yeon Park, Chang Ryeol Ryu
  • Method and system for variably adjusting voltage of LDC for hybrid vehicle
    Patent number: 9873334
    Abstract: A method and system are provided for variably adjusted voltage of the LDC applied with an IBS (Intelligent Battery Sensor). The LDC output voltage control mode is determined in each of three driving modes, and the high electric loads are separated into two or more groups. The LDC output voltage value and the order priority are differentiated based on the durability of the auxiliary battery. Additionally, an LDC output voltage order table is generated according to the driving mode and the SOC state based on the auxiliary battery SOC information obtained from an IBS. Thus, consumed energy of the LDC and an energy consumption amount of the auxiliary battery are minimized, thus improving fuel efficiency.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: January 23, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Jun Shin, Yong Kak Choi, Soung Han Noh, Hwan Hwang, Jun Yeon Park, Chang Ryeol Ryu
  • APPARATUS AND METHOD FOR CONTROLLING SYNCHRONIZING RECTIFIER OF LDC
    Publication number: 20180026543
    Abstract: An apparatus for controlling a synchronizing rectifier of a low voltage direct current (DC)-DC converter (LDC) may include a receiver receiving an LDC output command voltage, and a controller controlling an operation of the synchronizing rectifier based on the received LDC output command voltage.
    Type: Application
    Filed: November 11, 2016
    Publication date: January 25, 2018
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dae Woong HAN, Jeong Bin YIM, Jae Hwa JEON, Sang Kyu LEE
  • LDC-INTEGRATED BATTERY MANAGEMENT DEVICE AND METHOD FOR 48V MILD HYBRID SYSTEM
    Publication number: 20200148188
    Abstract: A low DC-DC converter (LDC)-integrated battery management device for a 48V mild hybrid system includes an low DC-DC converter (LDC)-integrated battery management device for a 48V mild hybrid system, in which a battery management system and an LDC of a 48V mild hybrid system, which are each controlled by a electronic control unit (ECU), are integrally managed.
    Type: Application
    Filed: October 31, 2019
    Publication date: May 14, 2020
    Inventor: Il Han KIM
  • SYSTEM AND METHOD FOR CONTROLLING LDC OF HYBRID VEHICLE
    Publication number: 20160303993
    Abstract: A system and a method for controlling a low voltage DC/DC converter (LDC) of a hybrid vehicle is provided in which a fuel efficiency mode for artificially turning off pulse width modulation (PWM) control of the LDC is added, thereby improving fuel efficiency. Accordingly, the fuel efficiency mode for artificially turning off the PWM control of the LDC is added, so that when the fuel efficiency mode is performed, power of an auxiliary battery is temporarily supplied to an electric field load, thereby reducing power consumption of a main battery and improving fuel efficiency. Further, when the auxiliary battery is separated, power of the main battery is temporarily supplied to the electric field load by performing the PWM control of the LDC, to prevent a phenomenon that power is not supplied to the electric field load when the auxiliary battery is separated.
    Type: Application
    Filed: November 2, 2015
    Publication date: October 20, 2016
    Inventors: Jee Heon Kim, Hyun Wook Seong, Won Kyoung Choi, Dong Jun Lee
  • System and method for controlling LDC of hybrid vehicle
    Patent number: 9669728
    Abstract: A system and a method for controlling a low voltage DC/DC converter (LDC) of a hybrid vehicle is provided in which a fuel efficiency mode for artificially turning off pulse width modulation (PWM) control of the LDC is added, thereby improving fuel efficiency. Accordingly, the fuel efficiency mode for artificially turning off the PWM control of the LDC is added, so that when the fuel efficiency mode is performed, power of an auxiliary battery is temporarily supplied to an electric field load, thereby reducing power consumption of a main battery and improving fuel efficiency. Further, when the auxiliary battery is separated, power of the main battery is temporarily supplied to the electric field load by performing the PWM control of the LDC, to prevent a phenomenon that power is not supplied to the electric field load when the auxiliary battery is separated.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: June 6, 2017
    Assignee: Hyundai Motor Company
    Inventors: Jee Heon Kim, Hyun Wook Seong, Won Kyoung Choi, Dong Jun Lee
  • SYSTEM AND METHOD FOR CONTROLLING LOW-VOLTAGE DC/DC CONVERTER (LDC) OF HYBRID ELECTRIC VEHICLE
    Publication number: 20150046001
    Abstract: A method and system for controlling a low-voltage DC/DC converter (LDC) of a hybrid electric vehicle (HEV) includes performing a trial starting comprising steps of: trying ignition start, performing an immobilizer authentication process, and turning on a main relay of a high-voltage battery. The LDC is controlled after the trial starting, so that an operating voltage is applied from the LDC to an electric load including various kinds of controllers, thereby allowing starting of the HEV.
    Type: Application
    Filed: December 23, 2013
    Publication date: February 12, 2015
    Applicant: Hyundai Motor Company
    Inventors: Dae Ro PARK, Ji Yeol PARK, Seok Min JEONG
  • APPARATUS AND METHOD FOR CONTROLLING LDC OF HYBRID VEHICLE
    Publication number: 20180162231
    Abstract: An apparatus and method for controlling an LDC of a hybrid vehicle are provided. The apparatus includes a determining controller that receives state information of an auxiliary battery, while the LDC is being operated in a first mode based on a detected voltage, and that determines whether an entry condition for a second mode based on a current is satisfied. An arithmetic controller calculates a charging current compensation value of the auxiliary battery when the entry condition for the second mode is satisfied and a mode controller enters the second mode and that controls the LDC based on the charging current compensation value of the auxiliary battery when the entry condition for the second mode is satisfied.
    Type: Application
    Filed: September 20, 2017
    Publication date: June 14, 2018
    Inventors: Dong Jun Shin, Ho Joong Lee, Jun Yeon Park
  • System and method for controlling low-voltage DC/DC converter (LDC) of hybrid electric vehicle
    Patent number: 8996219
    Abstract: A method and system for controlling a low-voltage DC/DC converter (LDC) of a hybrid electric vehicle (HEV) includes performing a trial starting comprising steps of: trying ignition start, performing an immobilizer authentication process, and turning on a main relay of a high-voltage battery. The LDC is controlled after the trial starting, so that an operating voltage is applied from the LDC to an electric load including various kinds of controllers, thereby allowing starting of the HEV.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: March 31, 2015
    Assignee: Hyundai Motor Company
    Inventors: Dae Ro Park, Ji Yeol Park, Seok Min Jeong
  • Apparatus and method for controlling LDC of hybrid vehicle
    Patent number: 10471840
    Abstract: An apparatus and method for controlling an LDC of a hybrid vehicle are provided. The apparatus includes a determining controller that receives state information of an auxiliary battery, while the LDC is being operated in a first mode based on a detected voltage, and that determines whether an entry condition for a second mode based on a current is satisfied. An arithmetic controller calculates a charging current compensation value of the auxiliary battery when the entry condition for the second mode is satisfied and a mode controller enters the second mode and that controls the LDC based on the charging current compensation value of the auxiliary battery when the entry condition for the second mode is satisfied.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: November 12, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Jun Shin, Ho Joong Lee, Jun Yeon Park
  • SYSTEM AND METHOD FOR CONTROLLING LDC VOLTAGE OF HYBRID VEHICLE
    Publication number: 20160368480
    Abstract: A system and method for controlling a low-voltage DC-DC converter (LDC) voltage of a hybrid vehicle are provided. The LDC voltage is optimally adjusted based on which driving mode the vehicle enters, thereby improving fuel efficiency. The method includes determining whether the hybrid vehicle is driven in a regenerative braking mode and whether a value of a state of charge (SOC) of an auxiliary battery is equal to or greater than a first critical value set as a value when charging of the auxiliary battery is unnecessary during the driving in the regenerative braking mode. When the value of the SOC of the auxiliary battery is equal to or greater than the predetermined first critical value, the driving mode is switched from the regenerative braking mode to an electric vehicle (EV) mode, and to variably adjust an LDC target voltage in the EV mode.
    Type: Application
    Filed: December 5, 2015
    Publication date: December 22, 2016
    Inventors: Dong Jun Shin, Soung Han Noh, Jun Yeon Park, Chang Ryeol Yoo, Hwan Hwang
  • System and method for controlling LDC voltage of hybrid vehicle
    Patent number: 9969398
    Abstract: A system and method for controlling a low-voltage DC-DC converter (LDC) voltage of a hybrid vehicle are provided. The LDC voltage is optimally adjusted based on which driving mode the vehicle enters, thereby improving fuel efficiency. The method includes determining whether the hybrid vehicle is driven in a regenerative braking mode and whether a value of a state of charge (SOC) of an auxiliary battery is equal to or greater than a first critical value set as a value when charging of the auxiliary battery is unnecessary during the driving in the regenerative braking mode. When the value of the SOC of the auxiliary battery is equal to or greater than the predetermined first critical value, the driving mode is switched from the regenerative braking mode to an electric vehicle (EV) mode, and to variably adjust an LDC target voltage in the EV mode.
    Type: Grant
    Filed: December 5, 2015
    Date of Patent: May 15, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Jun Shin, Soung Han Noh, Jun Yeon Park, Chang Ryeol Yoo, Hwan Hwang
  • COOLING DEVICE FOR INVERTER AND LDC ELEMENTS FOR HEV
    Publication number: 20080112137
    Abstract: The present invention relates to a cooling device for inverter and DC/DC converter (LDC) elements for hybrid electric vehicle (HEV) and, more particularly, to a cooling device for inverter and LDC elements for HEV that enhances the cooling efficiency by applying a cooling device that uses a heat pipe principle to convect coolant to an inverter system that radiates heat of high temperature.
    Type: Application
    Filed: August 15, 2007
    Publication date: May 15, 2008
    Inventor: Kang Hoon KO
  • APPARATUS AND METHOD FOR CONTROLLING LDC IN ELECTRIC VEHICLE
    Publication number: 20170349047
    Abstract: An apparatus and a method are provided for controlling a low DC-DC converter (LDC) in an electric vehicle by prioritizing respective controllers, connecting the controllers in series in ascending order according to priority, and determining a command voltage of the LDC on the basis of output voltages of the respective controllers. Accordingly, even when a controller with a highest priority is operating, controllers of lower priority continue operating. Thus, electrical load performance degradation caused by instantaneous overcurrent generated in state transitions is prevented.
    Type: Application
    Filed: November 15, 2016
    Publication date: December 7, 2017
    Inventors: Ho Joong Lee, Dong Jun Shin, Won Kyoung Choi, Jun Yeon Park, Gi Bong Son, Hyun Wook Seong, Jee Heon Kim, Chang Ryeol Yoo, Hui Sung Jang
  • Multi-functional multi-ratio OBC/LDC integrated circuit
    Patent number: 11351881
    Abstract: The present disclosure relates to a multi-functional multi-ratio OBC/LDC integrated circuit that is capable of bidirectional operation over a broad voltage rage with a high power density and without additional control in a battery charging system for an electric vehicle. As the turns ratio can be used selectively, the G2V and V2G functions can be performed bidirectionally over a broad voltage range without additional control, and the LDC function can be operated by using only a small number of switches, so that the efficiency of the charging control can be increased.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: June 7, 2022
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Jungwook Park, Issac Kim, Sunho Lee
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