Patents by Inventor Sung-Do KIM

Sung-Do KIM 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).

  • Patent number: 11107616
    Abstract: A coil component includes a body in which a coil part is embedded. The coil part includes a support member, pattern walls formed on the support member, and coil patterns extending between the pattern walls on the support member, and the pattern walls include support portions having a width greater than an average width of the pattern walls.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: August 31, 2021
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Young Do Choi, Yu Jong Kim, Sung Min Moon, Tae Ryung Hu, Sang Seob Kim, Dong Min Kim
  • Publication number: 20210261795
    Abstract: The present invention relates to a compound for release agent and method for preparing the same, and more specifically, to a compound for a release agent that can be coated in an ultra-thin form without thermal deformation even when heat is continuously or discontinuously applied in a continuous evaporator, and a method for preparing the same.
    Type: Application
    Filed: August 26, 2020
    Publication date: August 26, 2021
    Applicant: CEKO CO., LTD.
    Inventors: Hyun Joong KIM, Hong Chul KIM, Sung-Do LEE
  • Publication number: 20210146783
    Abstract: A motor driving control method for controlling a motor speed so that a speed measured value of a motor follows a speed command value is provided. The method includes driving the motor by repeating an on section where a torque is generated in the motor and an off section where a torque is not generated in the motor at a regular period, based on the speed command value, wherein the driving includes applying a phase voltage to only one of multiple phases of the motor in the on section by a pulse width modulation scheme.
    Type: Application
    Filed: July 7, 2020
    Publication date: May 20, 2021
    Inventors: Min Su Kang, Chang Seok You, Sung Do Kim, Dong Hun Lee
  • Patent number: 10978724
    Abstract: A method for removing residual water in a fuel cell stack includes: blocking, by an air compressor, air supply to a fuel cell stack upon shutting down of fuel cell; measuring a cell voltage of the fuel cell stack while the air supply is blocked; estimating an amount of residual water in the fuel cell stack based on the measured cell voltage of the fuel cell stack; and removing, by a driving controller, the residual water in the fuel cell stack by driving the air compressor based on the estimated amount of water.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: April 13, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chang Seok You, Sung Do Kim, Min Su Kang, Soon Woo Kwon, Dong Hun Lee
  • Publication number: 20210104968
    Abstract: Provided is a method of controlling a sensorless motor for an air compressor. The method controls early driving of a sensorless motor for an air compressor, overcomes related-art problems, and improves control response. A position of a rotor of the motor, finally estimated by a sensorless control logic at a point in time at which the motor is determined to be in the stopped state, is determined to be an alignment target position. An alignment start position is determined from the alignment target position in accordance with a predetermined alignment offset angle. The position of the rotor of the motor is controlled to change from the determined alignment start position to the alignment target position.
    Type: Application
    Filed: September 2, 2020
    Publication date: April 8, 2021
    Inventors: Chang Seok You, Sung Do Kim, Min Su Kang
  • Publication number: 20210083306
    Abstract: An operation control system and method of a fuel cell vehicle are provided. The system includes a fuel cell, an air supply device operated by a motor, to supply air to the fuel cell and a sensing unit that senses an abnormal operation of the air supply device. A calculation unit calculates a lower-limit voltage of the air supply device required for normal operation of the air supply device when the sensing unit senses abnormal operation of the air supply device. A controller then adjusts a voltage supplied to the air supply device based on the calculated lower-limit voltage.
    Type: Application
    Filed: January 15, 2020
    Publication date: March 18, 2021
    Inventors: Sung Do Kim, Chang Seok You, Min Su Kang
  • Patent number: 10936017
    Abstract: A flexible display device is disclosed. The flexible display device includes a first body, a second body, a flexible display, and a first cover. The second body performs reciprocating movement between a first position and a second position relative to the first body. The flexible display includes a first region, a first connected region, and a second connected region. When the second body is at the first position, the first cover covers the second connected region and forms a rear surface of the flexible display device. When switching between the first position and the second position is made, the user may hold the flexible display device in contact with the first region and the first cover.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: March 2, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Hak-Ho Choi, Seounghwan Seol, Sung Do Kim, Ji Woong Yang, Sangwook Park, Jeeho Yom
  • Publication number: 20210028734
    Abstract: A method of controlling a sensorless motor of an air compressor is provided to overcome the known problems of sensorless control methods and to improve control responsiveness. In various aspects of the present invention, a method of controlling a sensorless motor of an air compressor includes: performing a speed control for stopping a motor by a controller; determining a motor stopped state from an estimated motor speed while the speed control is performed by the controller; determining a rotor position estimated as a fixed position when the motor stopped state is determined by the controller; performing motor position control for moving the rotor position to the fixed position when the motor stopped state is determined; and starting sensorless control for driving the motor by setting the fixed position to an initial position when requesting a motor driving while the rotor position is maintained at the fixed position.
    Type: Application
    Filed: June 22, 2020
    Publication date: January 28, 2021
    Inventors: Chang Seok You, Min Su Kang, Sung Do Kim, Dong Hun Lee
  • Patent number: 10899238
    Abstract: A control apparatus of a vehicle can include: a controller configured to control an operation function of the vehicle; and a power supply unit configured to supply power to the controller or to cut off power supply thereto. The power supply unit can include a) a key hold circuit storing a key hold-on/off state of the key hold circuit corresponding to a key hold function of supplying power to the controller after the control apparatus shuts down and b) a power supply determiner determining whether to supply the power to the controller.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: January 26, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chang Seok You, Min Su Kang, Sung Do Kim, Dong Hun Lee
  • Patent number: 10903768
    Abstract: A method of correcting a signal delay of a Hall sensor for an air compressor motor when the air compressor motor rotates at a high speed includes: a first step of calculating an offset angle ? from a voltage equation, to which a q-axis voltage and a d-axis voltage are applied, by performing zero current control when an inertia braking section occurs during an operation of the motor; a second step of calculating a reference offset angle ?offset of the Hall sensor and a delay time t by using an angular velocity ? at any two points in the inertia braking section by using the equation for calculating the offset angle ?; and a third step of calculating a corrected q-axis voltage and a corrected d-axis voltage through the zero current control corrected and comparing the corrected q-axis voltage and the corrected d-axis voltage with a reference error.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: January 26, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung-Do Kim, Min-Su Kang, Chang-Seok You, Dong-Hun Lee
  • Patent number: 10889733
    Abstract: A coating composition may include 5 wt % to 20 wt % of a caprolactone-modified hyperbranched polyester polyol, the caprolactone-modified hyperbranched polyester polyol obtained from polyhydric alcohol including caprolactone triol, 30 wt % to 50 wt % of a first acrylic resin, the first acrylic resin having a hydroxyl group, 15 wt % to 25 wt % of a second acrylic resin, the second acrylic resin having a hydroxyl group and having a glass transition temperature higher than that of the first acrylic resin, and an extra solvent.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: January 12, 2021
    Assignee: NOROO BEE Chemical Co., Ltd.
    Inventors: Jae Beom Ahn, Young Hoon Choi, Dae Geun Oh, Sung Do Kim, Si Hyun Jeong
  • Publication number: 20210005893
    Abstract: The present invention relates to an electrode active-material composition including, as a binder material for an electrode active material, a conductive polymer synthesized using a cellulose-based compound and/or a weakly acidic compound alone or in combination as a template, and a lithium-ion battery manufactured using the same, and particularly to PEDOT:CMC synthesized as a preferred active-material composition, and a lithium-ion battery manufactured using the same as a binder. The technique of the present invention is capable of improving the cycle characteristics, that is, the lifetime, of the lithium-ion battery including an anode active material made of a graphite component and/or a silicon component alone or in combination, along with various cathode active materials including a nickel-cobalt-manganese (NCM)-based active material, a nickel-cobalt-aluminum (NCA)-based active material, a lithium-cobalt oxide (LCO) active material, and other lithium containing materials.
    Type: Application
    Filed: February 28, 2019
    Publication date: January 7, 2021
    Inventors: Jong Eun KIM, Bo Won SUH, Sung Do KIM, Jong Do KIM, Bo Ram LEE, Gyu Jin JUNG
  • Patent number: 10826095
    Abstract: An air supply control method and system for a fuel cell controlling a switching frequency of an inverter at which power consumption of the air compressor becomes minimal includes: calculating a revolution per minute (RPM) of a motor of an air compressor; calculating a switching frequency of an inverter of the motor of the air compressor at which power consumption becomes minimal based on the calculated RPM of the motor; and controlling the inverter with the calculated switching frequency.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: November 3, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chang Seok You, Min Su Kang, Sung Do Kim, Dong Hun Lee
  • Patent number: 10768234
    Abstract: A method for estimating power consumption of a motor includes steps of: determining an error voltage for a terminal voltage of each of multiple phases of the motor, the terminal voltage being supplied from an inverter to the motor; generating a compensation terminal voltage for each of the multiple phases of the motor by applying the error voltage to a prediction value of the terminal voltage that is derived in a preset manner during operation of the motor; and calculating power consumption of the motor by using the compensation terminal voltage and a current value obtained by detecting a current that flows in each of the multiple phases of the motor.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: September 8, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Dong Hun Lee, Chang Seok You, Min Su Kang, Sung Do Kim
  • Patent number: 10752114
    Abstract: A motor drive control method is provided for controlling a speed of a motor such that a measured speed value of the motor follows a speed command value. The motor drive control method includes an on/off driving operation of driving a torque of the motor based on the speed command value in such a way that the torque of the motor is repeatedly turned on/off on preset cycle and duty. The motor drive control method and system can markedly enhance efficiency of a motor by reducing switching loss and current ripple loss of an inverter in a low-speed driving period of a high-speed motor.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: August 25, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Hun Lee, Chang Seok You, Min Su Kang, Sung Do Kim
  • Patent number: 10756601
    Abstract: A control method of a motor rotation speed may include calculating a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the speed sensor, calculating a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system, and controlling an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system.
    Type: Grant
    Filed: August 5, 2018
    Date of Patent: August 25, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Hun Lee, Sung Do Kim, Chang Seok You, Min Su Kang, Soon Il Jeon
  • Patent number: 10720862
    Abstract: A method of calculating a motor position uses a hall sensor. The method can include determining a motor position in response to a signal change of a hall sensor installed to a motor, calculating a basic compensation value for compensating a motor position error due to signal measurement delay of the hall sensor, determining whether a current command condition for a constant-speed operation of the motor is satisfied, calculating a first-up compensation value and a first-down compensation value, calculating an average values of the deviation between d-q axes current commands, and correcting the motor position using the basic compensation value when a difference between the average values is less than a reference average value.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: July 21, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sung Do Kim, Chang Seok You, Min Su Kang, Joon Yong Lee, Dong Hun Lee
  • Publication number: 20200220487
    Abstract: A method of correcting a signal delay of a Hall sensor for an air compressor motor when the air compressor motor rotates at a high speed includes: a first step of calculating an offset angle ? from a voltage equation, to which a q-axis voltage and a d-axis voltage are applied, by performing zero current control when an inertia braking section occurs during an operation of the motor; a second step of calculating a reference offset angle ?offset of the Hall sensor and a delay time t by using an angular velocity ? at any two points in the inertia braking section by using the equation for calculating the offset angle ?; and a third step of calculating a corrected q-axis voltage and a corrected d-axis voltage through the zero current control corrected and comparing the corrected q-axis voltage and the corrected d-axis voltage with a reference error.
    Type: Application
    Filed: October 4, 2019
    Publication date: July 9, 2020
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung-Do Kim, Min-Su Kang, Chang-Seok You, Dong-Hun Lee
  • Publication number: 20200144643
    Abstract: A method of controlling an air compressor motor for a fuel cell vehicle is provide. The method includes calculating a counter electromotive force constant of the air compressor motor based on a voltage and a current of the air compressor motor for the fuel cell vehicle supplying air to a fuel cell stack and a rotation speed of the air compressor motor. The method additionally includes determining whether a permanent magnet of the air compressor motor is demagnetized based on a result of comparison between the calculated counter electromotive force constant value and a pre-set counter electromotive force constant design value.
    Type: Application
    Filed: April 16, 2019
    Publication date: May 7, 2020
    Inventors: Sung Do Kim, Min Su Kang, Chang Seok You, Dong Hun Lee
  • Publication number: 20200140702
    Abstract: A curing agent includes a polyisocyanate. The polyisocyanate is obtained by reaction of a polyester polyol and a diisocyanate. The polyester polyol has 500 to 2,000 of a weight average molecular weight and 5% to 10% of a hydroxyl group content.
    Type: Application
    Filed: November 5, 2019
    Publication date: May 7, 2020
    Applicant: NOROO BEE Chemical Co., Ltd.
    Inventors: Jae Beom Ahn, Hoonkwan Joo, Dae Geun Oh, Sung Do Kim, Sung Kyu Lee