公开(公告)号：US11718944B2

公开(公告)日：2023-08-08

申请号：US17048682

申请日：2019-04-19

申请人： LG ELECTRONICS INC.

发明人： Jungmoon Je ,  Kiwook Lee

IPC分类号： D06F33/32 ,  D06F33/48 ,  D06F33/42 ,  D06F34/14 ,  H02P6/17 ,  H02P6/28 ,  D06F103/48 ,  D06F103/26 ,  D06F103/42 ,  D06F34/08 ,  D06F105/08 ,  D06F23/02 ,  F04D25/06 ,  F04D27/00 ,  D06F103/46 ,  D06F103/68 ,  D06F105/48 ,  D06F37/30 ,  D06F39/08

CPC分类号： D06F33/32 ,  D06F33/42 ,  D06F33/48 ,  D06F34/14 ,  D06F23/02 ,  D06F34/08 ,  D06F37/304 ,  D06F39/082 ,  D06F2103/26 ,  D06F2103/42 ,  D06F2103/46 ,  D06F2103/48 ,  D06F2103/68 ,  D06F2105/08 ,  D06F2105/48 ,  F04D25/06 ,  F04D27/004 ,  H02P6/17 ,  H02P6/28

摘要： The present disclosure relates to a laundry treatment machine. According to an embodiment of the present disclosure, a laundry treatment machine includes a controller controlling a motor, during dewatering, to be driven at a first speed when a lift is at a first level and to drive the motor at a second speed greater than the first speed when the lift is at a second level greater than the first level, wherein the lift is a difference between a water level of a water introduction part through which water flows into a drain pump and a water level of a water discharge part through which the water is discharged out of the drain pump. Accordingly, noise or vibration can be reduced even if the lift is changed during the dewatering.

公开(公告)号：US11258393B2

公开(公告)日：2022-02-22

申请号：US16629267

申请日：2018-07-05

申请人： LG Electronics Inc.

发明人： Hansu Jung ,  Seokhee Cho ,  Jungmoon Je

IPC分类号： H02P21/36 ,  H02P27/08 ,  H02P27/12 ,  H02P21/18 ,  H02P21/22

摘要： The present invention relates to a motor drive apparatus and, more particularly, to a motor drive apparatus capable of immediately restarting by maintaining sensorless control during a stop operation of a motor. The motor drive apparatus comprises: an inverter for driving a motor by using an AC voltage; and a control unit for controlling operations of a switching element included in the inverter. At this time, when a stop command is input, the control unit decreases a duty ratio of a PWM signal until a present speed of the motor becomes smaller than a predetermined minimum speed, thereby decreasing the revolutions per minute of the motor. Then, when a restart command is input in a state where the duty ratio of the PWM signal is decreased, the control unit can immediately restart the motor by increasing the duty ratio of the PWM signal.

公开(公告)号：US11885056B2

公开(公告)日：2024-01-30

申请号：US17048660

申请日：2019-04-19

申请人： LG ELECTRONICS INC.

发明人： Jungmoon Je ,  Kiwook Lee

IPC分类号： D06F33/42 ,  D06F33/47 ,  D06F33/34 ,  D06F39/08 ,  D06F105/10 ,  D06F103/44 ,  D06F103/18 ,  D06F105/08

CPC分类号： D06F33/42 ,  D06F33/34 ,  D06F33/47 ,  D06F39/08 ,  D06F2103/18 ,  D06F2103/44 ,  D06F2105/08 ,  D06F2105/10

摘要： The present disclosure relates to a laundry treatment machine. The laundry treatment machine according to an embodiment of the present disclosure includes a controller configured to start dewatering after a first period from completion of drainage when a lift is at a first level, and to start the dewatering after a second period from the completion of the drainage when the lift is at a second level greater than the first level, wherein the second period is longer than the first period. Accordingly, based on the lift, it is possible to change the dewatering entry period after drainage is completed.

公开(公告)号：US09954473B2

公开(公告)日：2018-04-24

申请号：US15205638

申请日：2016-07-08

申请人： LG ELECTRONICS INC. ,  Pusan National University Industry-University Cooperation Foundation

发明人： Jungmoon Je ,  Hansu Jung ,  Chungill Lee ,  Jangmok Kim ,  Hyunkeun Ku ,  Hanbeom Yeom

IPC分类号： H02P21/24 ,  H02P27/08 ,  H02P6/18

CPC分类号： H02P21/24 ,  H02M7/00 ,  H02P6/17 ,  H02P6/18 ,  H02P6/28 ,  H02P21/22 ,  H02P27/08

摘要： The present invention relates to a motor driving apparatus and a home appliance including the same. A motor driving apparatus according to an embodiment of the present invention includes an inverter for converting a DC voltage of a DC-link capacitor into an AC voltage according to a switching operation and outputting the converted AC voltage to a motor; a DC-link resistor disposed between the DC-link capacitor and the inverter; and a controller for controlling the inverter based on a phase current sampled through the DC-link resistor, wherein the controller estimates a phase current based on the phase current sampled through the DC link resistor, in an interval in which phase current detection is not possible. Thereby, the phase current flowing through the motor may be accurately calculated using the DC link resistor.

公开(公告)号：US11566361B2

公开(公告)日：2023-01-31

申请号：US16900030

申请日：2020-06-12

申请人： LG ELECTRONICS INC.

发明人： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC分类号： D06F33/48 ,  D06F39/08 ,  H02P21/05 ,  D06F37/40 ,  H02P23/04 ,  D06F103/04 ,  D06F103/18 ,  D06F103/26 ,  D06F103/48 ,  D06F105/48 ,  D06F105/58 ,  D06F33/42

摘要： Disclosed herein is a drain pump driving apparatus and a laundry treatment machine including the same. The drain pump driving apparatus and the laundry treatment machine including the same according to an embodiment of the present invention include a motor to operate the drain pump, an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation and output the converted AC power to the motor, an output current detector to detect an output current flowing to the motor, and a controller to control the inverter, wherein the controller may calculate a speed ripple of the motor based on the output current and performs a control operation based on the calculated speed ripple of the motor to change a speed of the motor.

公开(公告)号：US10711387B2

公开(公告)日：2020-07-14

申请号：US15490475

申请日：2017-04-18

申请人： LG ELECTRONICS INC.

发明人： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC分类号： D06F39/08 ,  D06F33/02 ,  D06F37/24 ,  D06F37/30 ,  D06F37/40 ,  D06F39/00 ,  D06F39/02 ,  H02P23/04 ,  H02P21/05

摘要： Disclosed herein is a drain pump driving apparatus and a laundry treatment machine including the same. The drain pump driving apparatus and the laundry treatment machine including the same according to an embodiment of the present invention include a motor to operate the drain pump, an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation and output the converted AC power to the motor, an output current detector to detect an output current flowing to the motor, and a controller to control the inverter, wherein the controller may calculate a speed ripple of the motor based on the output current and performs a control operation based on the calculated speed ripple of the motor to change a speed of the motor.

公开(公告)号：US09973131B2

公开(公告)日：2018-05-15

申请号：US15013817

申请日：2016-02-02

申请人： LG ELECTRONICS INC.

发明人： Junho Lee ,  Chungill Lee ,  Jungmoon Je

IPC分类号： H02P27/06 ,  H02P27/08 ,  H02P6/28 ,  H02P21/18 ,  D06F37/30 ,  H02P6/14

CPC分类号： H02P27/06 ,  D06F37/304 ,  H02P6/14 ,  H02P6/28 ,  H02P21/18 ,  H02P27/085

摘要： The present disclosure relates to a motor driving device and a laundry treatment apparatus. The motor driving device may include an inverter to convert DC power into AC power according to a switching operation and to output the converted AC power to a motor, an output current detector to detect an output current flowing through the motor, and a controller to control the inverter based on the detected output current. The controller changes a carrier frequency, changes a voltage command based on the changed carrier frequency and outputs an inverter switching control signal to the inverter based on the changed carrier frequency and the changed voltage command. Accordingly, noise may be reduced during operation of the motor.

公开(公告)号：US12116713B2

公开(公告)日：2024-10-15

申请号：US17048927

申请日：2019-04-19

申请人： LG ELECTRONICS INC.

发明人： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC分类号： D06F33/42 ,  D06F39/08 ,  F04D27/00 ,  D06F34/08 ,  D06F34/14 ,  D06F103/42 ,  D06F103/46 ,  D06F103/48 ,  D06F105/08 ,  F04D25/06 ,  H02P6/17 ,  H02P6/28

CPC分类号： D06F33/42 ,  D06F39/085 ,  F04D27/004 ,  D06F34/08 ,  D06F34/14 ,  D06F2103/42 ,  D06F2103/46 ,  D06F2103/48 ,  D06F2105/08 ,  F04D25/06 ,  H02P6/17 ,  H02P6/28

摘要： The present disclosure relates to a drain pump driving apparatus and a laundry treatment machine including the same. A drain pump driving apparatus according to an embodiment of the present disclosure includes a controller configured to drive a motor, during drainage, based on an output current and a direct current (DC) terminal voltage with a first power when a lift is at a first level and to drive the motor with the first power when the lift is at a second level that is greater than the first level, wherein the lift is a difference between a water level of a water introduction part through which water flows into a drain pump and a water level of a water discharge part through which the water is discharged out of the drain pump. Accordingly, water pumping can be performed smoothly even if the lift is changed during the drainage.

公开(公告)号：US11286603B2

公开(公告)日：2022-03-29

申请号：US16177859

申请日：2018-11-01

申请人： LG Electronics Inc.

发明人： Kiwook Lee ,  Jungmoon Je

IPC分类号： D06F33/47 ,  D06F33/00 ,  D06F39/08 ,  D06F103/18 ,  D06F103/38 ,  D06F103/42 ,  D06F103/48 ,  D06F103/70 ,  D06F105/08 ,  D06F105/48 ,  D06F105/54 ,  D06F105/58 ,  D06F34/08 ,  D06F101/20 ,  D06F34/28

摘要： The present invention provides a laundry treating apparatus including a drain pump having a motor, an inverter unit to transfer power to the motor, and a control unit to control the inverter unit to operate the drain pump, wherein the control unit sets an operation mode of the drain pump based on a current flowing in a part of the inverter unit, and controls the inverter unit based on the set operation mode.

公开(公告)号：US11274388B2

公开(公告)日：2022-03-15

申请号：US16476956

申请日：2018-01-08

申请人： LG ELECTRONICS INC.

发明人： Jungmoon Je ,  Kiwook Lee

IPC分类号： D06F33/42 ,  F04B17/03 ,  F04B49/06 ,  H02P27/06 ,  D06F39/08 ,  D06F103/24 ,  D06F103/48 ,  D06F105/08 ,  D06F105/62

摘要： According to the present invention, a control method for a clothing treatment device comprises the steps of: transmitting a power-related order to a motor that provides electric power to a drain pump in order to perform a dehydration process; detecting a unit revolution count of the motor while the dehydration process is performed; determining whether the detected unit revolution count exceeds a preset limited revolution count; reducing the unit revolution count of the motor to a predetermined unit revolution count if the detected unit revolution count exceeds the limited revolution count; and repeatedly transmitting the power-related order to the motor.