Patents by Inventor Sunku Kwon
Sunku Kwon 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: 11840791Abstract: A washing method according to the present invention comprises: a first rotation step for rotating an inner tub; a rotating direction detecting step for detecting the rotating direction of the inner tub; and a second rotation step for starting to rotate the inner tub in the opposite direction to the rotating direction of the inner tub when the rotation of the inner tub stops in the first rotation step. When the inner tub stops over a predetermined time and then restarts, the inner tub starts to rotate in the opposite direction to the rotating direction when the inner tub stops, thereby reducing the eccentricity of the inside of the inner tub, inhibiting collisions between the inner tub and an outer tub, reducing noise during collisions, and improving the rotation performance of the inner tub.Type: GrantFiled: February 17, 2015Date of Patent: December 12, 2023Assignee: LG ELECTRONICS INC.Inventors: Sunho Lee, Bonkwon Koo, Sunku Kwon, Sanghyun Lee
-
Patent number: 11805967Abstract: The present disclosure provides a control method capable of, by using a current value of a nozzle, determining whether a nozzle is separated from a vacuum cleaner and whether the nozzle is reconnected to the vacuum cleaner after separation. To this end, a vacuum cleaner may comprise a nozzle connectable to a suction unit for suctioning dusts. The nozzle may comprise a rotary cleaning unit for applying pressure to a cleaning target surface so as to separate a foreign substance therefrom, and a nozzle motor for driving the rotary cleaning unit. In order to drive the nozzle, a voltage having been controlled by a pulse width modulation (PWM) method is applied, and a measurement unit included in the vacuum cleaner may measure a current value of the nozzle, the current value depending on the applied voltage.Type: GrantFiled: June 18, 2020Date of Patent: November 7, 2023Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Sehwa Choe, Donghyun Lim, Chaseung Jun
-
Patent number: 11705832Abstract: A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at the same speed is smaller than the number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at different speeds. Accordingly, a plurality of motors can be simultaneously driven at different speeds, by using a single inverter.Type: GrantFiled: May 13, 2022Date of Patent: July 18, 2023Assignee: LG Electronics Inc.Inventors: Sunku Kwon, Chaseung Jun, Sehwa Choe, Wookjin Lee
-
Publication number: 20230223882Abstract: The present disclosure relates to a motor assembly, and more particularly, to a motor having a two-phase input power source and a power conversion device for driving a two-phase motor. The present disclosure relates to the motor assembly for driving the two-phase motor, the motor assembly configured to comprise: a motor including a first winding and a second winding having an electrically insulated parallel structure; a DC-link circuit for supplying a direct-current voltage; and an inverter connected to the DC-link circuit to convert the direct-current voltage into an alternating-current voltage to drive the motor, and including a first switching element set connected to the first winding and a second switching element set connected to the second winding.Type: ApplicationFiled: June 18, 2020Publication date: July 13, 2023Inventors: Sunku KWON, Chaseung JUN, Jaehoon JEONG, Jungik HA
-
Patent number: 11522475Abstract: A motor driving device controls a three-phase motor and a single-phase motor to operate in parallel. The motor driving device includes a dc terminal in which an upper and a lower DC-link capacitor are located. The motor driving device also includes a neutral terminal disposed between the upper and lower DC-link capacitors. The motor driving device includes an inverter that includes three pairs of upper switching elements and lower switching elements. Two pairs of upper switching elements and lower switching elements among three pairs are connected to an a-phase terminal and a b-phase terminal of the three-phase motor, respectively. The other pair of upper switching elements and lower switching elements among three pairs is connected to a first terminal of the single-phase motor. The neutral terminal is connected to a second terminal of the single-phase motor. A c-phase terminal of the three-phase motor is connected to the single-phase motor.Type: GrantFiled: July 2, 2021Date of Patent: December 6, 2022Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Chaseung Jun
-
Publication number: 20220361726Abstract: The present disclosure provides a control method capable of, by using a current value of a nozzle, determining whether a nozzle is separated from a vacuum cleaner and whether the nozzle is reconnected to the vacuum cleaner after separation. To this end, a vacuum cleaner may comprise a nozzle connectable to a suction unit for suctioning dusts. The nozzle may comprise a rotary cleaning unit for applying pressure to a cleaning target surface so as to separate a foreign substance therefrom, and a nozzle motor for driving the rotary cleaning unit. In order to drive the nozzle, a voltage having been controlled by a pulse width modulation (PWM) method is applied, and a measurement unit included in the vacuum cleaner may measure a current value of the nozzle, the current value depending on the applied voltage.Type: ApplicationFiled: June 18, 2020Publication date: November 17, 2022Inventors: Sunku KWON, Sehwa CHOE, Donghyun LIM, Chaseung JUN
-
Publication number: 20220273150Abstract: The present disclosure provides a control method for automatically detecting what kind of nozzle is a nozzle mounted on a cleaner by using different starting current profiles. The cleaner may include a suction unit for suctioning dust, and various nozzles which are detachable from the suction unit. The nozzle may include a rotation cleaning unit which is accommodated in the nozzle to clean a surface to be cleaned, and a nozzle driving unit for driving the rotation cleaning unit. The nozzle may exhibit different starting current profiles depending on the number of rotations or reduction ratio of the nozzle driving unit, or whether an auxiliary control unit is included.Type: ApplicationFiled: June 18, 2020Publication date: September 1, 2022Inventors: Sunku KWON, Sehwa CHOE, Donghyun LIM, Chaseung JUN
-
Publication number: 20220271690Abstract: A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at the same speed is smaller than the number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at different speeds. Accordingly, a plurality of motors can be simultaneously driven at different speeds, by using a single inverter.Type: ApplicationFiled: May 13, 2022Publication date: August 25, 2022Inventors: Sunku KWON, Chaseung JUN, Sehwa CHOE, Wookjin LEE
-
Patent number: 11362601Abstract: A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at the same speed is smaller than the number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at different speeds. Accordingly, a plurality of motors can be simultaneously driven at different speeds, by using a single inverter.Type: GrantFiled: August 7, 2020Date of Patent: June 14, 2022Assignee: LG Electronics Inc.Inventors: Sunku Kwon, Chaseung Jun, Sehwa Choe, Wookjin Lee
-
Patent number: 11332869Abstract: A clothes-processing apparatus is disclosed. The clothes-processing apparatus may have a cabinet defining an external appearance of the apparatus. The clothes-processing apparatus may also have a tub body provided inside the cabinet to accommodate water. Further, the clothes-processing apparatus may have a tub cover coupled to the tub body. The tub cover may have an opening through which laundry is introduced. The clothes-processing apparatus may have a drum rotatably provided inside the tub to accommodate laundry. The clothes-processing apparatus may also have a plurality of cleaning nozzles provided at the tub to spray the water toward a preset area of the drum. At least some of the plurality of cleaning nozzles may jet water at different spray angles.Type: GrantFiled: April 11, 2016Date of Patent: May 17, 2022Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Youngho Kim
-
Patent number: 11326292Abstract: A drum washing machine includes a tub and a drum rotatably supported in the tub and implements a control method that allows the tub to be easily cleaned. The method of controlling the washing machine includes supplying washing water during a first water supplying step to the interior of the tub while the drum is rotating at a water-supplying RPM; and executing a first wash step following completion of the first water supply step by accelerating the rotation of the drum from the water-supplying RPM to a first-wash RPM so that a circulatory flow is created in which the washing water falls from the top of opposite ends of the tub while circulating along the inner circumferential surface of the tub due to the rotational power of the drum.Type: GrantFiled: January 20, 2017Date of Patent: May 10, 2022Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Youngho Kim, Kahyung Choi, Hocheol Kwon, Youngkee Oh
-
Patent number: 11329578Abstract: A device for driving a plurality of motors and an electric apparatus having the same is disclosed. The device includes an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected to the multi-phase motor, and a first capacitor and a second capacitor connected in series between a first end and a second end of the DC terminal, wherein the single-phase motor is connected to the multi-phase motor, and a node between the first capacitor and the second capacitor. Accordingly, a plurality of motors serially connected with each other can be driven by using a single inverter.Type: GrantFiled: August 7, 2020Date of Patent: May 10, 2022Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Chaseung Jun, Sehwa Choe, Wookjin Lee
-
Patent number: 11323048Abstract: A device for driving a plurality of motors and an electric apparatus includes a first and a second capacitor, an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected with the multi-phase motor, and a controller configured to control the inverter. For starting the single phase motor during operation of the multi-phase motor, the controller is configured to perform, during an alignment period, an alignment of a rotor of the single-phase motor and perform, during a voltage compensation period, a voltage compensation for compensating a voltage change of a DC terminal neutral point between the first capacitor and the second capacitor based on the alignment of the rotor of the single-phase motor.Type: GrantFiled: November 3, 2020Date of Patent: May 3, 2022Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Chaseung Jun, Jaehoon Jeong, Sehwa Choe, Wookjin Lee
-
Patent number: 11214909Abstract: A drum washing machine implements a control method, allowing a tub of the drum washing machine to be easily cleaned. The method includes supplying washing water during a first water supplying step to the interior of the tub while a drum rotatably supported in the tub rotates at a water-supplying RPM. A first wash step is executed following completion of the first water supplying step, and includes accelerating rotation of the drum from the water-supplying RPM to a first-wash RPM to that create a circulatory flow in which the washing water falls from the top of opposite ends of the tub while circulating along the inner circumferential surface of the tub due to the rotational power of the drum. A wash draining step is started during the first wash step, and includes turning on the drain pump and controlling the amount of the washing water in the tub.Type: GrantFiled: January 20, 2017Date of Patent: January 4, 2022Assignee: LG Electronics Inc.Inventors: Sunku Kwon, Kahyung Choi, Youngho Kim, Inhyouk Seo, Youngkee Oh
-
Publication number: 20210336565Abstract: A motor driving device controls a three-phase motor and a single-phase motor to operate in parallel. The motor driving device includes a dc terminal in which an upper and a lower DC-link capacitor are located. The motor driving device also includes a neutral terminal disposed between the upper and lower DC-link capacitors. The motor driving device includes an inverter that includes three pairs of upper switching elements and lower switching elements. Two pairs of upper switching elements and lower switching elements among three pairs are connected to an a-phase terminal and a b-phase terminal of the three-phase motor, respectively. The other pair of upper switching elements and lower switching elements among three pairs is connected to a first terminal of the single-phase motor. The neutral terminal is connected to a second terminal of the single-phase motor. A c-phase terminal of the three-phase motor is connected to the single-phase motor.Type: ApplicationFiled: July 2, 2021Publication date: October 28, 2021Applicant: LG ELECTRONICS INC.Inventors: Sunku KWON, Chaseung JUN
-
Patent number: 11128242Abstract: A motor driving device controls a three-phase motor and a single-phase motor to operate in parallel. The motor driving device includes a dc terminal in which an upper and a lower DC-link capacitor are located. The motor driving device also includes a neutral terminal disposed between the upper and lower DC-link capacitors. The motor driving device includes an inverter that includes three pairs of upper switching elements and lower switching elements. Two pairs of upper switching elements and lower switching elements among three pairs are connected to a-phase terminal and b-phase terminal of the three-phase motor, respectively. The other pair of upper switching elements and lower switching elements among three pairs is connected to a first terminal of the single-phase motor. The neutral terminal is connected to c-phase terminal of the three-phase motor and a second terminal of the single-phase motor.Type: GrantFiled: March 26, 2020Date of Patent: September 21, 2021Assignee: LG ELECTRONICS INC.Inventors: Sunku Kwon, Chaseung Jun
-
Publication number: 20210135606Abstract: A device for driving a plurality of motors and an electric apparatus includes a first and a second capacitor, an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected with the multi-phase motor, and a controller configured to control the inverter. For starting the single phase motor during operation of the multi-phase motor, the controller is configured to perform, during an alignment period, an alignment of a rotor of the single-phase motor and perform, during a voltage compensation period, a voltage compensation for compensating a voltage change of a DC terminal neutral point between the first capacitor and the second capacitor based on the alignment of the rotor of the single-phase motor.Type: ApplicationFiled: November 3, 2020Publication date: May 6, 2021Applicant: LG ELECTRONICS INC.Inventors: Sunku KWON, Chaseung JUN, Jaehoon JEONG, Sehwa CHOE
-
Publication number: 20210102326Abstract: A drum washing machine implements a control method, allowing a tub of the drum washing machine to be easily cleaned. The method includes supplying washing water during a first water supplying step to the interior of the tub while a drum rotatably supported in the tub rotates at a water-supplying RPM. A first wash step is executed following completion of the first water supplying step, and includes accelerating rotation of the drum from the water-supplying RPM to a first-wash RPM to that create a circulatory flow in which the washing water falls from the top of opposite ends of the tub while circulating along the inner circumferential surface of the tub due to the rotational power of the drum. A wash draining step is started during the first wash step, and includes turning on the drain pump and controlling the amount of the washing water in the tub.Type: ApplicationFiled: January 20, 2017Publication date: April 8, 2021Applicant: LG ELECTRONICS INC.Inventors: Sunku KWON, Kahyung CHOI, Youngho KIM, Inhyouk SEO, Youngkee OH
-
Publication number: 20210044225Abstract: A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at the same speed is smaller than the number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at different speeds. Accordingly, a plurality of motors can be simultaneously driven at different speeds, by using a single inverter.Type: ApplicationFiled: August 7, 2020Publication date: February 11, 2021Inventors: Sunku KWON, Chaseung JUN, Sehwa CHOE, Wookjin LEE
-
Publication number: 20210044224Abstract: A device for driving a plurality of motors and an electric apparatus having the same is disclosed. The device includes an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected to the multi-phase motor, and a first capacitor and a second capacitor connected in series between a first end and a second end of the DC terminal, wherein the single-phase motor is connected to the multi-phase motor, and a node between the first capacitor and the second capacitor. Accordingly, a plurality of motors serially connected with each other can be driven by using a single inverter.Type: ApplicationFiled: August 7, 2020Publication date: February 11, 2021Applicant: LG ELECTRONICS INC.Inventors: Sunku Kwon, Chaseung Jun, Sehwa Choe, Wookjin Lee