Patents by Inventor Chang Seok Ryu
Chang Seok Ryu 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: 10003289Abstract: A method for controlling a motor is provided. The motor control method includes deriving a motor rotational speed estimate using a speed estimator model and deriving a motor hall sensor frequency estimate based on the derived rotational speed estimate. Additionally, a filter for noise detection is set based on the derived hall sensor frequency estimate and the derived rotational speed estimate. A motor hall sensor frequency derived from the hall sensor is then applied to a predetermined filter to detect a hall sensor noise frequency.Type: GrantFiled: February 25, 2016Date of Patent: June 19, 2018Assignee: Hyundai Motor CompanyInventors: Dong Hun Lee, Chang Seok Ryu, Min Su Kang, Sung Do Kim
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Patent number: 9972853Abstract: Disclosed herein is a fuel cell system. The fuel cell system includes: a turbocharger configured to receive and pressurize air discharged from an outlet of a fuel cell and supply the pressurized air to an inlet of the fuel cell; a plurality of valves configured to be provided at an inlet and an outlet of the turbocharger to control an amount of air supplied to the turbocharger in the air discharged from the outlet of the fuel cell and control a pressure of air supplied from the turbocharger to the inlet of the fuel cell; and a controller configured to calculate an air pressure required for the fuel cell and control an opening of the valves based on the calculated air pressure required for the fuel cell.Type: GrantFiled: May 10, 2015Date of Patent: May 15, 2018Assignee: Hyundai Motor CompanyInventors: Min Su Kang, Chang Seok Ryu, Sung Do Kim, Dong Hun Lee
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Patent number: 9847541Abstract: A voltage synchronization method and system are provided. The system includes a main controller that is configured to determine whether voltage synchronization is possible. When the voltage synchronization is determined to be possible, the main controller is configured to transmit a voltage synchronization command to a plurality of auxiliary controllers. The plurality of auxiliary controllers are configured to adjust sensed voltages based on an output voltage of a fuel cell stack when the transmitted voltage synchronization command is received.Type: GrantFiled: August 4, 2014Date of Patent: December 19, 2017Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Sung Jin Chung, Chang Seok Ryu, Joon Yong Lee
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Patent number: 9837945Abstract: A motor control method and system are provided. The motor control method includes recognizing, by a controller, a driving signal for a motor and when the controller recognizes the driving signal, the controller determine a failure of multiple Hall sensors disposed within the motor, based on signals detected by the multiple Hall sensors. Additionally, when the Hall sensors in the motor are determined to be faulty, the controller identifies a faulty Hall sensor from among the multiple Hall sensors by analyzing respective frequencies of the signals detected by the multiple Hall sensors.Type: GrantFiled: April 6, 2016Date of Patent: December 5, 2017Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Dong Hun Lee, Chang Seok Ryu, Min Su Kang, Sung Do Kim
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Patent number: 9821665Abstract: A safety apparatus for portable power generation of a fuel cell vehicle and an operation method thereof are provided. The safety apparatus includes a fuel cell that supplies power required for driving a motor of the fuel cell vehicle and a battery used as an auxiliary power source of the fuel cell. A bidirectional power converter adjusts input power and output power of the battery. A connection port connects to a portable power generator positioned extraneous to the fuel cell vehicle and a relay is connected to the connection port to adjust supplying of power to the portable power generator. A fuel cell controller determines whether a vehicle state satisfies a portable power generation mode entering condition when start-up of the fuel cell vehicle is turned on and operates the relay based on a confirmation result to perform portable power generation.Type: GrantFiled: November 11, 2015Date of Patent: November 21, 2017Assignee: Hyundai Motor CompanyInventors: Keun Bong Ham, Chang Seok Ryu, Kyu Il Lee
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Patent number: 9725011Abstract: A system and a method are provided for controlling emergency driving of a fuel cell vehicle. The system includes a cutoff relay that connects or cuts off a current flow between a chopper and a supercapacitor. A connecting relay connects or cuts off a current flow between a power line to which a fuel cell and a driving motor are connected and the supercapacitor. An emergency driving relay includes a first terminal connected to a line branched from a ground line to which the fuel cell and the driving motor are connected and a second terminal connected between a braking resistor and the chopper. A power system controller is driven in an emergency driving mode to cutoff relay to be turned off and the connecting relay to be turned on during a short circuit of the chopper and turns the emergency driving relay on or off.Type: GrantFiled: October 20, 2015Date of Patent: August 8, 2017Assignee: Hyundai Motor CompanyInventors: Sungdo Kim, Minsu Kang, Chang Seok Ryu, Dong Hun Lee
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Publication number: 20170063263Abstract: A method for controlling a motor is provided. The motor control method includes deriving a motor rotational speed estimate using a speed estimator model and deriving a motor hall sensor frequency estimate based on the derived rotational speed estimate. Additionally, a filter for noise detection is set based on the derived hall sensor frequency estimate and the derived rotational speed estimate. A motor hall sensor frequency derived from the hall sensor is then applied to a predetermined filter to detect a hall sensor noise frequency.Type: ApplicationFiled: February 25, 2016Publication date: March 2, 2017Inventors: Dong Hun Lee, Chang Seok Ryu, Min Su Kang, Sung Do Kim
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Publication number: 20170047877Abstract: A motor control method and system are provided. The motor control method includes recognizing, by a controller, a driving signal for a motor and when the controller recognizes the driving signal, the controller determine a failure of multiple Hall sensors disposed within the motor, based on signals detected by the multiple Hall sensors. Additionally, when the Hall sensors in the motor are determined to be faulty, the controller identifies a faulty Hall sensor from among the multiple Hall sensors by analyzing respective frequencies of the signals detected by the multiple Hall sensors.Type: ApplicationFiled: April 6, 2016Publication date: February 16, 2017Inventors: Dong Hun Lee, Chang Seok Ryu, Min Su Kang, Sung Do Kim
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Patent number: 9531310Abstract: A method and system for computing a motor speed and a rotor position using a hall sensor are provided. The method improves precision for computing the speed of the motor rotating at a high speed and the rotor position using the hall sensor based on configurations, such as the hall sensor mounted in the motor as a position sensor, a motor controller configured to receive a signal of the hall sensor to operate the motor, and a microcomputer configured to store a time when the motor controller senses the timing of a change in the signal of the hall sensor.Type: GrantFiled: December 13, 2014Date of Patent: December 27, 2016Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Dong Hun Lee, Min Su Kang, Soon Woo Kwon, Sung Do Kim, Joon Yong Lee, Chang Seok Ryu
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Publication number: 20160362010Abstract: A safety apparatus for portable power generation of a fuel cell vehicle and an operation method thereof are provided. The safety apparatus includes a fuel cell that supplies power required for driving a motor of the fuel cell vehicle and a battery used as an auxiliary power source of the fuel cell. A bidirectional power converter adjusts input power and output power of the battery. A connection port connects to a portable power generator positioned extraneous to the fuel cell vehicle and a relay is connected to the connection port to adjust supplying of power to the portable power generator. A fuel cell controller determines whether a vehicle state satisfies a portable power generation mode entering condition when start-up of the fuel cell vehicle is turned on and operates the relay based on a confirmation result to perform portable power generation.Type: ApplicationFiled: November 11, 2015Publication date: December 15, 2016Inventors: Keun Bong Ham, Chang Seok Ryu, Kyu Il Lee
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Publication number: 20160288666Abstract: A system and a method are provided for controlling emergency driving of a fuel cell vehicle. The system includes a cutoff relay that connects or cuts off a current flow between a chopper and a supercapacitor. A connecting relay connects or cuts off a current flow between a power line to which a fuel cell and a driving motor are connected and the supercapacitor. An emergency driving relay includes a first terminal connected to a line branched from a ground line to which the fuel cell and the driving motor are connected and a second terminal connected between a braking resistor and the chopper. A power system controller is driven in an emergency driving mode to cutoff relay to be turned off and the connecting relay to be turned on during a short circuit of the chopper and turns the emergency driving relay on or off.Type: ApplicationFiled: October 20, 2015Publication date: October 6, 2016Inventors: Sungdo Kim, Minsu Kang, Chang Seok Ryu, Dong Hun Lee
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Patent number: 9372236Abstract: A failure determination method for a motor system includes setting a current value required to initially drive a motor to a first current command value, increasing a rotational speed of a rotating magnetic field of the motor up to a preset reference speed, comparing an intensity of a back electromotive force, generated when a rotor of the motor is rotated at the preset reference speed, to a magnitude of a voltage applied to apply current in accordance with the set first current command value, and determining a cause of a failure of the motor based on the comparison.Type: GrantFiled: November 22, 2014Date of Patent: June 21, 2016Assignee: Hyundai Motor CompanyInventors: Dong Hun Lee, Soon Woo Kwon, Joon Yong Lee, Chang Seok Ryu
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Publication number: 20160159247Abstract: A system and method for a cooling water control of a vehicle are provided. The method for a cooling water control of a vehicle includes detecting a flow rate of cooling water and comparing the detected flow rate with a preset normal flow rate value. When the detected flow rate of cooling water is less than the preset normal flow rate value a cooling water pump speed command is increased until a power average value of the cooling water pump reaches a reference power value when the cooling water is normally circulated to increase an RPM of the cooling water pump.Type: ApplicationFiled: May 10, 2015Publication date: June 9, 2016Inventors: Dong Hun Lee, Kang Sik Jeon, Chang Seok Ryu, Min Su Kang, Nam Woo Lee, Sung Do Kim
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Publication number: 20160164121Abstract: Disclosed herein is a fuel cell system. The fuel cell system includes: a turbocharger configured to receive and pressurize air discharged from an outlet of a fuel cell and supply the pressurized air to an inlet of the fuel cell; a plurality of valves configured to be provided at an inlet and an outlet of the turbocharger to control an amount of air supplied to the turbocharger in the air discharged from the outlet of the fuel cell and control a pressure of air supplied from the turbocharger to the inlet of the fuel cell; and a controller configured to calculate an air pressure required for the fuel cell and control an opening of the valves based on the calculated air pressure required for the fuel cell.Type: ApplicationFiled: May 10, 2015Publication date: June 9, 2016Inventors: Min Su Kang, Chang Seok Ryu, Sung Do Kim, Dong Hun Lee
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Patent number: 9350277Abstract: A method for estimating a voltage of an input terminal of an inverter includes checking three-phase currents flowing from an inverter to a motor. A voltage of an input terminal of the inverter is calculated based on a plurality of design parameters, the three-phase currents, and PWM duties for determining switching operations of a plurality of switching elements of the inverter.Type: GrantFiled: October 23, 2014Date of Patent: May 24, 2016Assignee: HYUNDAI MOTOR COMPANYInventors: Dong Hun Lee, Sungdo Kim, Chang Seok Ryu
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Publication number: 20160094165Abstract: A method and system for computing a motor speed and a rotor position using a hall sensor are provided. The method improves precision for computing the speed of the motor rotating at a high speed and the rotor position using the hall sensor based on configurations, such as the hall sensor mounted in the motor as a position sensor, a motor controller configured to receive a signal of the hall sensor to operate the motor, and a microcomputer configured to store a time when the motor controller senses the timing of a change in the signal of the hall sensor.Type: ApplicationFiled: December 13, 2014Publication date: March 31, 2016Inventors: Dong Hun Lee, Min Su Kang, Soon Woo Kwon, Sung Do Kim, Joon Yong Lee, Chang Seok Ryu
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Publication number: 20150362556Abstract: A failure determination method for a motor system includes setting a current value required to initially drive a motor to a first current command value, increasing a rotational speed of a rotating magnetic field of the motor up to a preset reference speed, comparing an intensity of a back electromotive force, generated when a rotor of the motor is rotated at the preset reference speed, to a magnitude of a voltage applied to apply current in accordance with the set first current command value, and determining a cause of a failure of the motor based on the comparison.Type: ApplicationFiled: November 22, 2014Publication date: December 17, 2015Inventors: Dong Hun Lee, Soon Woo Kwon, Joon Yong Lee, Chang Seok Ryu
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Publication number: 20150349675Abstract: A method for estimating a voltage of an input terminal of an inverter includes checking three-phase currents flowing from an inverter to a motor. A voltage of an input terminal of the inverter is calculated based on a plurality of design parameters, the three-phase currents, and PWM duties for determining switching operations of a plurality of switching elements of the inverter.Type: ApplicationFiled: October 23, 2014Publication date: December 3, 2015Inventors: Dong Hun LEE, Sungdo KIM, Chang Seok RYU
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Publication number: 20150345500Abstract: A motor torque control method for an air blower may include: setting a phase current command value of a motor of the air blower based on a temperature of the motor, calculating a d-axis current command value other than zero in compliance with the set phase current command value, and outputting the calculated d-axis current command value.Type: ApplicationFiled: November 22, 2014Publication date: December 3, 2015Inventors: Soon Woo Kwon, Chang Seok Ryu, Joon Yong Lee, Dong Hun Lee, Sung D. Kim
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Publication number: 20150188168Abstract: A voltage synchronization method and system are provided. The system includes a main controller that is configured to determine whether voltage synchronization is possible. When the voltage synchronization is determined to be possible, the main controller is configured to transmit a voltage synchronization command to a plurality of auxiliary controllers. The plurality of auxiliary controllers are configured to adjust sensed voltages based on an output voltage of a fuel cell stack when the transmitted voltage synchronization command is received.Type: ApplicationFiled: August 4, 2014Publication date: July 2, 2015Inventors: Sung Jin Chung, Chang Seok Ryu, Joon Yong Lee