-
公开(公告)号：US11362601B2
公开(公告)日：2022-06-14
申请号：US16988329
申请日：2020-08-07
Applicant: LG Electronics Inc.
Inventor： Sunku Kwon , Chaseung Jun , Sehwa Choe , Wookjin Lee
Abstract: 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.
-
公开(公告)号：US11323048B2
公开(公告)日：2022-05-03
申请号：US17087789
申请日：2020-11-03
Applicant: LG ELECTRONICS INC.
Inventor： Sunku Kwon , Chaseung Jun , Jaehoon Jeong , Sehwa Choe , Wookjin Lee
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US11329578B2
公开(公告)日：2022-05-10
申请号：US16987628
申请日：2020-08-07
Applicant: LG ELECTRONICS INC.
Inventor： Sunku Kwon , Chaseung Jun , Sehwa Choe , Wookjin Lee
Abstract: 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.
-
公开(公告)号：US12029380B2
公开(公告)日：2024-07-09
申请号：US17627968
申请日：2020-06-18
Applicant: LG ELECTRONICS INC.
Inventor： Sunku Kwon , Sehwa Choe , Donghyun Lim , Chaseung Jun
CPC classification number: A47L9/2842 , A47L5/225 , A47L5/24 , A47L5/28 , A47L5/362 , A47L9/0673 , A47L9/2805 , A47L9/2831 , A47L9/2847
Abstract: 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.
-
公开(公告)号：US11805967B2
公开(公告)日：2023-11-07
申请号：US17627917
申请日：2020-06-18
Applicant: LG ELECTRONICS INC.
Inventor： Sunku Kwon , Sehwa Choe , Donghyun Lim , Chaseung Jun
CPC classification number: A47L9/2831 , A47L5/30 , A47L5/362 , A47L9/0411 , A47L9/2842 , A47L9/2847 , A47L9/0477
Abstract: 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.
-
公开(公告)号：US11705832B2
公开(公告)日：2023-07-18
申请号：US17744303
申请日：2022-05-13
Applicant: LG Electronics Inc.
Inventor： Sunku Kwon , Chaseung Jun , Sehwa Choe , Wookjin Lee
CPC classification number: H02P5/50 , H02P21/22 , H02P2201/03 , H02P2209/01
Abstract: 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.
-
公开(公告)号：US20210044224A1
公开(公告)日：2021-02-11
申请号：US16987628
申请日：2020-08-07
Applicant: LG ELECTRONICS INC.
Inventor： Sunku Kwon , Chaseung Jun , Sehwa Choe , Wookjin Lee
IPC: H02P5/50
Abstract: 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.
-
-
-
-
-
-
Search Results
7
records
(took 0.014 seconds)
