Patents by Inventor Hee-Kwang Lee
Hee-Kwang 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: 20240128810Abstract: Disclosed are an easily manufacturable stator for an axial flux motor, and a method of manufacturing the same. A stator includes a core, a bobbin having a hollow portion into which the core is inserted, and a winding wound around the bobbin. A radial outer corner portion of the core is formed to have a cross-sectional shape bent at least twice.Type: ApplicationFiled: March 15, 2023Publication date: April 18, 2024Inventors: Hyun Seok Hong, Hyun Woo Jun, Hee Kwang Lee
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Patent number: 11963439Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure, it is possible to produce an organic electroluminescent device having improved driving voltage, power efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.Type: GrantFiled: August 24, 2022Date of Patent: April 16, 2024Assignee: Rohm and Haas Electronic Materials Korea Ltd.Inventors: Eun-Joung Choi, Young-Kwang Kim, Su-Hyun Lee, So-Young Jung, YeJin Jeon, Hong-Se Oh, Dong-Hyung Lee, Jin-Man Kim, Hyun-Woo Kang, Mi-Ja Lee, Hee-Ryong Kang, Hyo-Nim Shin, Jeong-Hwan Jeon, Sang-Hee Cho
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Patent number: 11939049Abstract: In an air mobility vehicle, an engine operates as required to provide mechanical driving force or electric energy. A battery is charged with the electric energy from the engine. Main rotors operate using the electric energy of the battery and electric power generated by the engine to perform takeoff, landing, and cruising. Auxiliary rotors are disposed at or adjacent to the center of gravity of a vehicle body and mechanically connected to the engine via a clutch. The auxiliary rotors perform the takeoff, the landing, or the cruising by receiving the mechanical driving force from the engine when the clutch is in an engaged position. A controller monitors the states of the battery and the main rotors and controls the operations of the engine and the clutch.Type: GrantFiled: September 19, 2022Date of Patent: March 26, 2024Assignees: Hyundai Motor Company, Kia CorporationInventors: Woo Suk Jung, Hee Kwang Lee, Hyun Seok Hong, Hyun Woo Jun
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Patent number: 11942615Abstract: An air-cooled battery cooling system for an air mobility vehicle may ensure the cooling performance for batteries using air flows during the flight of the air mobility vehicle, since the cooling of the batteries is performed using an air flow in the top-bottom direction due to the hovering of the air mobility vehicle and an air flow in the front and rear direction due to the cruising of the air mobility vehicle, the efficient cooling performance for the batteries is ensured in a variety of flight modes. Furthermore, the batteries are securely fixed while being cooled by air flows via the heat transfer pads within the battery packs.Type: GrantFiled: July 19, 2021Date of Patent: March 26, 2024Assignees: Hyundai Motor Company, Kia CorporationInventors: Hyun Woo Jun, Woo Suk Jung, Hee Kwang Lee, Hyun Seok Hong
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Publication number: 20240090328Abstract: The present invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of the multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.Type: ApplicationFiled: October 26, 2023Publication date: March 14, 2024Inventors: Hee-Choon AHN, Young-Kwang KIM, Su-Hyun LEE, Ji-Song JUN, Seon-Woo LEE, Chi-Sik KIM, Kyoung-Jin PARK, Nam-Kyun KIM, Kyung-Hoon CHOI, Jae-Hoon SHIM, Young-Jun CHO, Kyung-Joo LEE
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Patent number: 11918521Abstract: A foldable ramp according to an embodiment is configured to assist a movement of means of transportation which may be used by disabled people, such as a wheelchair. The foldable ramp may be used as a stand for a billboard, and the foldable ramp may be unfolded to be used as a ramp.Type: GrantFiled: September 15, 2022Date of Patent: March 5, 2024Assignee: HUMAN TECHNOLOGY & COMPLEX CO., LTDInventors: Dong Kwang Lee, Hee Sub Kim, Sam Young Kim
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Patent number: 11917907Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.Type: GrantFiled: November 22, 2021Date of Patent: February 27, 2024Assignee: Rohm and Haas Electronic Materials Korea Ltd.Inventors: Kyoung-Jin Park, Tae-Jin Lee, Jae-Hoon Shim, Yoo Jin Doh, Hee-Choon Ahn, Young-Kwang Kim, Doo-Hyeon Moon, Jeong-Eun Yang, Su-Hyun Lee, Chi-Sik Kim, Ji-Song Jun
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Patent number: 11905004Abstract: In an air mobility vehicle, an engine operates as required to provide mechanical driving force or electric energy. A battery is charged with the electric energy from the engine. Main rotors operate using the electric energy of the battery and electric power generated by the engine to perform takeoff, landing, and cruising. Auxiliary rotors are disposed at or adjacent to the center of gravity of a vehicle body and mechanically connected to the engine via a clutch. The auxiliary rotors perform the takeoff, the landing, or the cruising by receiving the mechanical driving force from the engine when the clutch is in an engaged position. A controller monitors the states of the battery and the main rotors and controls the operations of the engine and the clutch.Type: GrantFiled: March 2, 2021Date of Patent: February 20, 2024Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Woo Suk Jung, Hee Kwang Lee, Hyun Seok Hong, Hyun Woo Jun
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Patent number: 11891186Abstract: An air mobility vehicle may include air flaps located under a mounting position of each of rotary wings and rotatably mounted inside openings to guide a flow direction of air flowing to a region under each of the rotary wings or air flowing above the openings to inside of the air mobility vehicle, an actuator coupled to the air flaps and configured to rotate the air flaps to direct the air having passed through the air flaps to a motor, an inverter, or the motor and the inverter of each of the rotary wings, or batteries, and a controller electrically connected to the actuator and configured to control a flow of the air having passed through the air flaps by controlling the actuator depending on a driving state of the air mobility vehicle or temperatures of the motor and the inverter of each of the rotary wings or a temperature of the batteries.Type: GrantFiled: July 15, 2021Date of Patent: February 6, 2024Assignees: Hyundai Motor Company, Kia CorporationInventors: Sang Hyun Jung, Jae Young Choi, Hee Kwang Lee, Chung Sik Yim, Kyu Hoon Cho
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Patent number: 11851189Abstract: A hybrid air mobility system is capable of flying a long distance through effective operation of an engine and batteries. The hybrid air mobility system includes a fuselage configured to supply power to a propeller and electric equipment, the fuselage being provided with a duct including an inlet and an outlet so as to circulate air to the engine and the electric equipment; a deflector rotatably installed at the outlet of the duct so as to convert a discharge direction of exhaust gas generated by the engine and cooling air after cooling the electric equipment; and a controller configured to determine whether or not the engine is driven and to control a rotated position of the deflector depending on an amount of driving of the engine so as to selectively adjust movement of the exhaust gas and the cooling air towards the propeller.Type: GrantFiled: October 28, 2021Date of Patent: December 26, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Woo Suk Jung, Sang Hyun Jung, Byung Wook Chang, Keun Seok Lee, Hee Kwang Lee
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Patent number: 11745882Abstract: A power management system for an air mobility vehicle includes a plurality of batteries configured to provide power to a propulsion unit of the air mobility vehicle to propel the air mobility vehicle, and a discharge control unit configured to monitor an operation state and a charge state of each battery, determine a discharge mode of each of the plurality of batteries according to the monitored operation state and the monitored charge state, and control whether each of the plurality of batteries is discharged or a discharge rate thereof according to the determined discharge mode.Type: GrantFiled: July 22, 2021Date of Patent: September 5, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Hyun Ki Cho, Hyun Woo Jun, Hee Kwang Lee
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Patent number: 11711001Abstract: A is constructed such that upper and lower shafts, which are coaxial, are rotated in opposite directions using a single coil winding, simplifying the structure of the motor apparatus and reducing the numbers of sensors and controllers to be mounted thereon.Type: GrantFiled: July 29, 2021Date of Patent: July 25, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Hyun Seok Hong, Sang Hyun Jung, Hee Kwang Lee
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Patent number: 11705769Abstract: A magnetic gear may include a stator, having a stator core having a plurality of teeth extending toward a rotation shaft and a plurality of coils wound around the plurality of teeth, a rotor, having a rotor core disposed inside the stator and fixed to the rotation shaft and a plurality of permanent magnets attached to the external surface of the rotor core, and a pole-piece unit, having a plurality of first pole pieces and a plurality of second pole pieces arranged radially about the rotation shaft between the stator core and the rotor core such that the plurality of first pole pieces and the plurality of second pole pieces are alternately arranged in a circumferential direction thereof.Type: GrantFiled: July 22, 2021Date of Patent: July 18, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Hyun Woo Jun, Woo Suk Jung, Hyun Seok Hong, Hee Kwang Lee
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Patent number: 11670982Abstract: A motor apparatus has a cooling structure capable of effectively cooling the motor by inducing a fluid flow into the motor. In particular, the motor apparatus includes: a first part having a first flow path and a motor installed thereon; a second part having a second flow path and configured to be rotatably mounted on the first part and connected to the motor; and a turbine portion coupled to the second part and including disks stacked on one another forming spaces therebetween. When the turbine portion is rotated together with the second part, air is drawn through the first flow path or the second flow path and introduced into an opening hole of each of the disks, and the air is discharged into the spaces formed between the respective disks to cool the motor.Type: GrantFiled: March 1, 2021Date of Patent: June 6, 2023Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Hyun Seok Hong, Woo Suk Jung, Hyun Su Cho, Sang Hyun Jung, Hee Kwang Lee
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Patent number: 11664652Abstract: An emergency power management system of a mobility, may include a fuse device connected to a battery and including a first circuit and a second circuit in which a first fuse and a second fuse are respectively provided and are connected in parallel, a pyro switch provided between the first circuit and the second circuit, and configured to establish electric connection with the first circuit in ordinary times and to release electric connection with the first circuit and to establish electric connection with the second circuit in a case of emergency, a determiner configured to determine abnormality of the first fuse based on current applied from the high-voltage battery or voltages at opposite end portions of the first fuse, and a controller configured to operate the pyro switch when abnormality occurs in the first fuse.Type: GrantFiled: July 30, 2021Date of Patent: May 30, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Yoon Cheol Jeon, Hyun Woo Jun, Hee Kwang Lee, Hyun Ki Cho, Gwi Taek Kim, Hyun Seok Hong, Woo Suk Jung
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Patent number: 11591082Abstract: An apparatus for generating thrust for air transport includes a main thrust device, and an auxiliary thrust device configured to generate auxiliary thrust so as to enable an aircraft to vertically take off and land. The apparatus further includes: wings fixed to left and right sides of a fuselage of the aircraft, rotors installed on the wings and configured to generate thrust. In particular, the main thrust device provides driving force to the rotors using motors and an engine, and the auxiliary thrust device is installed in the fuselage and has a center of gravity configured to coincide with a center of gravity of the aircraft.Type: GrantFiled: May 4, 2021Date of Patent: February 28, 2023Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATIONInventors: Woo Suk Jung, Hee Kwang Lee, Hyun Seok Hong, Hyun Woo Jun
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Patent number: 11581834Abstract: A method for determining a motor angle, may include deriving a sensor weight and a sensorless weight via a cross product of an actual current vector and a model-based sensored current vector and a cross product of the actual current vector and a model-based sensorless current vector; and determining a final motor angle by applying the sensor weight and the sensorless weight to each of a sensored angle and a sensorless angle.Type: GrantFiled: August 25, 2021Date of Patent: February 14, 2023Assignees: Hyundai Motor Company, Kia Corporation, POSTECH Research and Business Development FoundationInventors: Hee Kwang Lee, Hyun Seok Hong, Kwang Hee Nam, Tae Yeon Lee
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Publication number: 20230020198Abstract: In an air mobility vehicle, an engine operates as required to provide mechanical driving force or electric energy. A battery is charged with the electric energy from the engine. Main rotors operate using the electric energy of the battery and electric power generated by the engine to perform takeoff, landing, and cruising. Auxiliary rotors are disposed at or adjacent to the center of gravity of a vehicle body and mechanically connected to the engine via a clutch. The auxiliary rotors perform the takeoff, the landing, or the cruising by receiving the mechanical driving force from the engine when the clutch is in an engaged position. A controller monitors the states of the battery and the main rotors and controls the operations of the engine and the clutch.Type: ApplicationFiled: September 19, 2022Publication date: January 19, 2023Inventors: Woo Suk Jung, Hee Kwang Lee, Hyun Seok Hong, Hyun Woo Jun
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Publication number: 20220340286Abstract: A hybrid air mobility system is capable of flying a long distance through effective operation of an engine and batteries. The hybrid air mobility system includes a fuselage configured to supply power to a propeller and electric equipment, the fuselage being provided with a duct including an inlet and an outlet so as to circulate air to the engine and the electric equipment; a deflector rotatably installed at the outlet of the duct so as to convert a discharge direction of exhaust gas generated by the engine and cooling air after cooling the electric equipment; and a controller configured to determine whether or not the engine is driven and to control a rotated position of the deflector depending on an amount of driving of the engine so as to selectively adjust movement of the exhaust gas and the cooling air towards the propeller.Type: ApplicationFiled: October 28, 2021Publication date: October 27, 2022Applicant: Kia CorporationInventors: Woo Suk Jung, Sang Hyun Jung, Byung Wook Chang, Keun Seok Lee, Hee Kwang Lee
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Publication number: 20220204172Abstract: A power management system for an air mobility vehicle includes a plurality of batteries configured to provide power to a propulsion unit of the air mobility vehicle to propel the air mobility vehicle, and a discharge control unit configured to monitor an operation state and a charge state of each battery, determine a discharge mode of each of the plurality of batteries according to the monitored operation state and the monitored charge state, and control whether each of the plurality of batteries is discharged or a discharge rate thereof according to the determined discharge mode.Type: ApplicationFiled: July 22, 2021Publication date: June 30, 2022Applicants: Hyundai Motor Company, Kia CorporationInventors: Hyun Ki CHO, Hyun Woo JUN, Hee Kwang LEE