Patents by Inventor Ki Jong Lee
Ki Jong 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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Publication number: 20210057904Abstract: An apparatus for protecting a device of a motor drive inverter includes a plurality of power modules configured to control the multi-phase alternating current supplied to the motor. Each of the plurality of power modules includes a top phase switching device connected to a positive terminal of the battery, a bottom phase switching device connected in series to the top phase switching device and connected to a negative terminal of the battery, and a current interruption unit connected in series to the top phase switching device and the bottom phase switching device, and configured to be disconnected when a current greater than or equal to a desired interrupting current flows thereto, so as to prevent a switching device of a power module from being burned out due to an overcurrent by installing a fuse wire to the power module.Type: ApplicationFiled: July 15, 2020Publication date: February 25, 2021Inventors: Ji Woong Jang, Sang Cheol Shin, Yoo Jong Lee, Ki Jong Lee, Kang Ho Jeong
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Patent number: 10923937Abstract: A charging system for an eco-friendly vehicle is provided. The system includes a power supply unit that provides power for charging an automotive battery and a charging unit including a motor and an inverter connected with the motor, and that charges the battery by being supplied with power from the power supply unit. One or more relays connect the power supply unit and the battery to each other and a controller moves a rotor of the motor to a predetermined reference position before charging the battery.Type: GrantFiled: October 4, 2019Date of Patent: February 16, 2021Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Seong Min Lee, Je Hwan Lee, Ki Jong Lee, Sang Cheol Shin
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Publication number: 20210044135Abstract: A charging system using a motor driving system includes: a battery, an inverter having connection terminals including a positive terminal and a negative terminal, and a plurality of motor connection terminals, and a plurality of switching elements forming an electrical connection relationship between the DC connection terminals and the connection terminals; a motor including a plurality of coils that has first ends respectively connected to the motor connection terminals, and second ends connected to each other to form a neutral point; a plurality of switches to form an electrical connection between the battery and the inverter, and to form an electrical connection between the battery and the neutral point, and to connect or disconnect a charging current to the DC connection terminals; and a controller controlling operation of the switches and the inverter based on a magnitude of a charging voltage.Type: ApplicationFiled: March 12, 2020Publication date: February 11, 2021Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Seong Min LEE, Sang Cheol SHIN, Young Seul LIM, Ki Jong LEE, Je Hwan LEE
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Publication number: 20210036699Abstract: An overcurrent detection reference compensation system of a switching element for an inverter and an overcurrent detection system using the same can correct an overcurrent detection reference used to detect an overcurrent of a switching element according to a temperature of the switching element.Type: ApplicationFiled: July 8, 2020Publication date: February 4, 2021Inventors: Yoo Jong Lee, Ji Woong Jang, Ki Jong Lee, Sang Cheol Shin
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Patent number: 10911041Abstract: An electronic circuit module is provided. The electronic circuit module prevents damage by efficiently detecting an overcurrent in the electronic circuit module using an SiC MOSFET. The electronic circuit module includes an input unit that is configured to input a reference voltage and a switching unit that is configured to output a first voltage based on a current flow. A converter is configured to output a second voltage based on the first voltage and the reference voltage. An output unit is configured to compare a magnitude of the reference voltage with a magnitude of the second voltage to output a feedback signal when the second voltage is greater than the reference voltage.Type: GrantFiled: December 7, 2017Date of Patent: February 2, 2021Assignees: Hyundai Motor Company, Kia Motors Corporation, Postech Academy-Industry FoundationInventors: Jiwoong Jang, Ki Jong Lee, Sangcheol Shin, Ki Young Jang, Kangho Jeong, Kwang Hee Nam, Sung Jin Kim
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Patent number: 10867992Abstract: A semiconductor system includes a control device, and a semiconductor apparatus coupled with the control device through a first line and a second line. A loading of the second line is greater than a loading of the first line, wherein the semiconductor apparatus includes a first receiving circuit which is electrically coupled with the first line and a second receiving circuit which is electrically coupled with the second line. Further a loading between the first line and the first receiving circuit is greater than a loading between the second line and the second receiving circuit.Type: GrantFiled: December 27, 2017Date of Patent: December 15, 2020Assignee: SK hynix Inc.Inventors: Joong-Ho Kim, Hyun Woo Kwack, Ki Jong Lee, Doo Bock Lee
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Publication number: 20200335981Abstract: A charging system for an eco-friendly vehicle is provided. The system includes a power supply unit that provides power for charging an automotive battery and a charging unit including a motor and an inverter connected with the motor, and that charges the battery by being supplied with power from the power supply unit. One or more relays connect the power supply unit and the battery to each other and a controller moves a rotor of the motor to a predetermined reference position before charging the battery.Type: ApplicationFiled: October 4, 2019Publication date: October 22, 2020Inventors: Seong Min Lee, Je Hwan Lee, Ki Jong Lee, Sang Cheol Shin
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Patent number: 10771005Abstract: An inverter system for a vehicle includes: an energy storage device configured to store electrical energy, a first inverter including a plurality of first switching elements and configured to convert the electrical energy stored in the energy storage device into alternating-current (AC) electric power, a second inverter including a plurality of second switching elements different from the plurality of first switching elements, a motor configured to be driven by receiving the AC power converted by the first inverter and the second inverter, current sensors disposed between the first inverter and the motor and the second inverters and the motor, respectively, and configured to detect a current input to the motor, and a controller configured to generate a pulse width modulation (PWM) signal for controlling driving of the motor.Type: GrantFiled: April 19, 2019Date of Patent: September 8, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Beom Sik Kim, Jin Hwan Jung, Sang Cheol Shin, Ji Woong Jang, Ki Young Jang, Ki Jong Lee
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Patent number: 10760980Abstract: An Insulated Gate Bipolar Transistor (IGBT) temperature sensor correction apparatus includes an Insulated Gate Bipolar Transistor (IGBT); a temperature sensor having a sensing diode; and a process variation sensor having an internal resistor.Type: GrantFiled: December 11, 2017Date of Patent: September 1, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Ji Woong Jang, Kang Ho Jeong, Ki Jong Lee, Sang Cheol Shin
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Patent number: 10756718Abstract: A gate driving apparatus for a power semiconductor device may include: a first off-resistor and a second off-resistor each having a first end connected to a gate of the power semiconductor device; a first off-switch configured to determine a connection state between a second end of the first off-resistor and a ground based on a gate driving signal for determining an on/off state of the power semiconductor device; a second off-switch configured to determine a connection state between a second end of the second off-resistor and the ground; an electric current detector configured to detect an electric current flowing from a collector (drain) of the power semiconductor device to an emitter (source) of the power semiconductor device; and a controller configured to determine an open/closed state of the second off-switch based on the gate driving signal and a magnitude of the electric current detected by the electric current detector.Type: GrantFiled: November 26, 2018Date of Patent: August 25, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Ki Jong Lee, Ji Woong Jang, Kang Ho Jeong, Sang Cheol Shin, Han Geun Jang
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Patent number: 10651775Abstract: An inverter system for a vehicle may include an energy storage device configured to store electrical energy; a first inverter including a plurality of first switching elements, and converting the energy into AC power; a second inverter including a plurality of second switching elements different from the first switching elements, being connected to the energy storage device in parallel with the first inverter, and converting the energy into AC power; a motor driven by receiving the AC power; a PWM signal generating device configured to generate a reference Pulse-width modulation (PWM) signal for controlling driving of the motor; and a PWM signal converting device configured to convert the reference PWM signal into both a first PWM signal input into the first inverter to drive the first switching elements, and a second PWM signal input into the second inverter to drive the second switching elements.Type: GrantFiled: September 17, 2018Date of Patent: May 12, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Ji Woong Jang, Ki Young Jang, Jin Hwan Jung, Sang Cheol Shin, Beom Sik Kim, Ki Jong Lee
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Publication number: 20200144954Abstract: An inverter system for a vehicle includes: an energy storage device configured to store electrical energy, a first inverter including a plurality of first switching elements and configured to convert the electrical energy stored in the energy storage device into alternating-current (AC) electric power, a second inverter including a plurality of second switching elements different from the plurality of first switching elements, a motor configured to be driven by receiving the AC power converted by the first inverter and the second inverter, current sensors disposed between the first inverter and the motor and the second inverters and the motor, respectively, and configured to detect a current input to the motor, and a controller configured to generate a pulse width modulation (PWM) signal for controlling driving of the motor.Type: ApplicationFiled: April 19, 2019Publication date: May 7, 2020Inventors: Beom Sik KIM, Jin Hwan JUNG, Sang Cheol SHIN, Ji Woong JANG, Ki Young JANG, Ki Jong LEE
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Publication number: 20200127655Abstract: A gate driving apparatus for a power semiconductor device may include: a first off-resistor and a second off-resistor each having a first end connected to a gate of the power semiconductor device; a first off-switch configured to determine a connection state between a second end of the first off-resistor and a ground based on a gate driving signal for determining an on/off state of the power semiconductor device; a second off-switch configured to determine a connection state between a second end of the second off-resistor and the ground; an electric current detector configured to detect an electric current flowing from a collector (drain) of the power semiconductor device to an emitter (source) of the power semiconductor device; and a controller configured to determine an open/closed state of the second off-switch based on the gate driving signal and a magnitude of the electric current detected by the electric current detector.Type: ApplicationFiled: November 26, 2018Publication date: April 23, 2020Inventors: Ki Jong Lee, Ji Woong Jang, Kang Ho Jeong, Sang Cheol Shin, Han Geun Jang
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Publication number: 20190326844Abstract: An inverter system for a vehicle may include an energy storage device configured to store electrical energy; a first inverter including a plurality of first switching elements, and converting the energy into AC power; a second inverter including a plurality of second switching elements different from the first switching elements, being connected to the energy storage device in parallel with the first inverter, and converting the energy into AC power; a motor driven by receiving the AC power; a PWM signal generating device configured to generate a reference Pulse-width modulation (PWM) signal for controlling driving of the motor; and a PWM signal converting device configured to convert the reference PWM signal into both a first PWM signal input into the first inverter to drive the first switching elements, and a second PWM signal input into the second inverter to drive the second switching elements.Type: ApplicationFiled: September 17, 2018Publication date: October 24, 2019Applicants: Hyundai Motor Company, Kia Motors CorporationInventors: Ji Woong JANG, Ki Young JANG, Jin Hwan JUNG, Sang Cheol SHIN, Beom Sik KIM, Ki Jong LEE
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Patent number: 10260967Abstract: An IGBT temperature sense circuit is provided. The IGBT temperature sense circuit automatically calibrates a temperature sense of a diode to minimize an error based on element characteristics of a temperature sense diode, precisely senses the temperature and removes a limit of a maximum current (to increase the maximum current) of an output of an IGBT. A temperature sense circuit includes an automatic calibrator that is configured to supply current of a current source to a current to a diode and a diode temperature sensor that is configured to measure a voltage of one side terminal of the diode based on the current of the diode based on a change of a temperature and adjustment of an operation of a protection object device.Type: GrantFiled: September 20, 2016Date of Patent: April 16, 2019Assignee: Hyundai Motor CompanyInventors: Ji Woong Jang, Ki Jong Lee, Kang Ho Jeong, Ki Young Jang, Sang Cheol Shin
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Publication number: 20190103865Abstract: An electronic circuit module is provided. The electronic circuit module prevents damage by efficiently detecting an overcurrent in the electronic circuit module using an SiC MOSFET. The electronic circuit module includes an input unit that is configured to input a reference voltage and a switching unit that is configured to output a first voltage based on a current flow. A converter is configured to output a second voltage based on the first voltage and the reference voltage. An output unit is configured to compare a magnitude of the reference voltage with a magnitude of the second voltage to output a feedback signal when the second voltage is greater than the reference voltage.Type: ApplicationFiled: December 7, 2017Publication date: April 4, 2019Inventors: Jiwoong Jang, Ki Jong Lee, Sangcheol Shin, Ki Young Jang, Kangho Jeong, Kwang Hee Nam, Sung Jin Kim
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Publication number: 20180358355Abstract: A semiconductor system includes a control device, and a semiconductor apparatus coupled with the control device through a first line and a second line. A loading of the second line is greater than a loading of the first line, wherein the semiconductor apparatus includes a first receiving circuit which is electrically coupled with the first line and a second receiving circuit which is electrically coupled with the second line. Further a loading between the first line and the first receiving circuit is greater than a loading between the second line and the second receiving circuit.Type: ApplicationFiled: December 27, 2017Publication date: December 13, 2018Applicant: SK hynix Inc.Inventors: Joong-Ho KIM, Hyun Woo KWACK, Ki Jong LEE, Doo Bock LEE
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Publication number: 20180321094Abstract: An Insulated Gate Bipolar Transistor (IGBT) temperature sensor correction apparatus includes an Insulated Gate Bipolar Transistor (IGBT); a temperature sensor having a sensing diode; and a process variation sensor having an internal resistor.Type: ApplicationFiled: December 11, 2017Publication date: November 8, 2018Inventors: Ji Woong Jang, Kang Ho Jeong, Ki Jong Lee, Sang Cheol Shin
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Patent number: 9995636Abstract: A temperature sensing system for a switching device is provided The temperature sensing system includes a sensing device that is configured to sense a temperature of the switching device and a signal converter that is configured to output a digital signal having a frequency based on a voltage across the sensing device by a frequency variable method which receives the voltage across the sensing device which is a temperature sensing value when a current flows in the sensing device to convert a level of an analog signal into a frequency of the digital signal. An isolator is configured to be connected to an output terminal of the signal converter to isolate and transmit the digital signal output from the signal converter. The system also includes a controller configured to recognize the temperature from the frequency of the digital signal transmitted through the isolator.Type: GrantFiled: December 11, 2014Date of Patent: June 12, 2018Assignee: Hyundai Motor CompanyInventors: Kang Ho Jeong, Ki Jong Lee, Jee Hye Jeong
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Patent number: 9929647Abstract: A circuit and method for protecting circuit elements, vehicle having the circuit, and method for controlling the vehicle are provided. The circuit for protecting circuit elements includes a circuit element, a driving signal generator that applies a driving voltage to the circuit element and an inductor with a first terminal electrically connected to the circuit element. A circuit protector obtains information regarding the driving voltage applied to the circuit element and a differential voltage across the first terminal and a second terminal of the inductor, compares the driving voltage applied to the circuit element with a first reference voltage, compares the differential voltage with a second reference voltage, and then transmits a control signal to the driving signal generator according to the comparison results.Type: GrantFiled: May 9, 2017Date of Patent: March 27, 2018Assignee: Hyundai Motor CompanyInventors: Kangho Jeong, Jiwoong Jang, Ki Jong Lee, Sangcheol Shin