公开(公告)号：US11866867B2

公开(公告)日：2024-01-09

申请号：US17048732

申请日：2019-04-19

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon Je ,  Kiwook Lee

IPC: D06F33/32 ,  D06F33/42 ,  D06F34/10 ,  D06F34/14 ,  D06F37/30 ,  D06F39/08 ,  D06F103/18 ,  D06F105/08 ,  D06F103/44 ,  D06F105/48 ,  D06F37/36 ,  D06F103/46

CPC classification number: D06F33/32 ,  D06F33/42 ,  D06F34/10 ,  D06F34/14 ,  D06F37/30 ,  D06F37/36 ,  D06F39/08 ,  D06F2103/18 ,  D06F2103/44 ,  D06F2103/46 ,  D06F2105/08 ,  D06F2105/48

Abstract: 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 increase or decrease stepwise a speed of a motor during dewatering. Accordingly, it is possible to reduce a speed ripple during dewatering.

公开(公告)号：US11236460B2

公开(公告)日：2022-02-01

申请号：US16094613

申请日：2017-04-18

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC: D06F39/08 ,  D06F33/42 ,  H02P21/18 ,  H02P21/22 ,  H02P21/14 ,  H02P27/12 ,  D06F103/48 ,  D06F37/12 ,  D06F105/46

Abstract: Disclosed is a drain pump driving apparatus and a laundry treatment machine including the same. The laundry treatment machine includes: a drain pump driving apparatus configured to drive a drain pump, wherein the drain pump driving apparatus includes: a motor to drive 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 configured to control the inverter, wherein the controller is further configured to calculate a speed of the motor based on an output current, and calculate a lift, which is a difference between a water level of a water introduction part through which water flows into the drain pump and s water level of a water discharge part for discharging water from the drain pump, based on the calculated speed.

公开(公告)号：US10291170B2

公开(公告)日：2019-05-14

申请号：US15017337

申请日：2016-02-05

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon Je ,  Minho Jang ,  Hyunjin Kim

IPC: H02P29/024 ,  D06F37/30 ,  H02P27/06 ,  H02P6/28 ,  H02P6/08 ,  H02P21/28

Abstract: The present disclosure relates to a motor driving device and a laundry treatment apparatus. An inverter is configured to convert a DC voltage of DC terminals into an AC voltage according to a switching operation and to output the AC voltage to a motor. A DC terminal voltage detector is configured to detect the voltage of the DC terminals, and an output current detector is configured to detect an output current flowing through the motor. A controller is configured to control the inverter based on the detected output current. The controller controls the motor to operate based on a flux current command value from among the flux current command values and a torque current command value for driving the motor in an overvoltage protection mode when the detected DC terminal voltage is higher than a first predetermined value and power is supplied from the motor to the DC terminals. Abrupt DC terminal voltage increase may be prevented.