公开(公告)号：EP3783143A1

公开(公告)日：2021-02-24

申请号：EP19787723.6

申请日：2019-04-19

Applicant: LG Electronics Inc.

Inventor： JE, Jungmoon ,  LEE, Chungill ,  LEE, Kiwook

IPC: D06F39/08 ,  D06F33/02

Abstract: 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：EP3508732A1

公开(公告)日：2019-07-10

申请号：EP16915277.4

申请日：2016-10-21

Applicant: LG Electronics Inc.

Inventor： LEE, Kiwook ,  JANG, Seongmin ,  JEONG, Jinhee ,  PARK, Chanmyung ,  RYU, Solji

IPC: F04D29/05 ,  F04D29/046 ,  F25B31/00

Abstract: The present invention relates to a compressor and a chiller system including the compressor, the compressor comprising: one or more impellers for suctioning a refrigerant in an axial direction and compressing the same in a centrifugal direction; a rotary shaft formed so as to rotate the impeller; a collar coupled to the rotary shaft so as to extend outward in the radial direction of the rotary shaft; a thrust magnetic bearing formed so as to support the collar by means of a magnetic field, thereby preventing axial movement of the rotary shaft; and a mechanical backup bearing formed so as to prevent axial movement of the rotary shaft, wherein the backup bearing is disposed so as to overlap a portion of the thrust magnetic bearing in the radial direction of the rotary shaft.

公开(公告)号：EP3848496A1

公开(公告)日：2021-07-14

申请号：EP19857746.2

申请日：2019-09-06

Applicant: LG Electronics Inc.

Inventor： LEE, Chungill ,  HWANG, Jinseong ,  LEE, Kiwook ,  CHOI, Jeongkeun

IPC: D06F39/08 ,  F04D15/00 ,  H02P27/06

Abstract: 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 and a laundry treatment machine including the same include: an inverter to convert an input direct current (DC) voltage into an alternating current (AC) voltage by a switching operation and to output the converted AC voltage to a drain motor; an output current detector to detect an output current flowing in the drain motor; and a controller to control the drain motor to rotate in a first direction during a first period, rotate in a second direction opposite to the first direction during a second period, and continuously rotate in the first direction when a level of the output current at rotation in the first direction is greater than a level of the output current at rotation in the second direction. Accordingly, it is possible to secure a pumping performance of the drain pump.

公开(公告)号：EP3235937A1

公开(公告)日：2017-10-25

申请号：EP17166746.2

申请日：2017-04-18

Applicant: LG Electronics Inc.

Inventor： JE, Jungmoon ,  LEE, Chungill ,  LEE, Kiwook

IPC: D06F37/30 ,  D06F39/08 ,  D06F33/02

CPC classification number: H02P23/04 ,  D06F33/02 ,  D06F37/24 ,  D06F37/304 ,  D06F37/40 ,  D06F39/005 ,  D06F39/02 ,  D06F39/085 ,  D06F2204/065 ,  Y02B40/52

Abstract: Disclosed herein are a drain pump (141), a drain pump driving apparatus (620) and a laundry treatment machine (100) including the same; wherein said laundry treatment machine (100) includes a motor (630) to operate the drain pump (141), an inverter (420) 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 (630), an output current detector (E) to detect an output current (idc) flowing to the motor (630), and a controller (430) to control the inverter (420), wherein the controller (430) may calculate a speed ripple of the motor (630) based on the output current (idc) and performs a control operation based on the calculated speed ripple of the motor (630) to change a speed of the motor (630).

Abstract translation: 本发明公开了一种排水泵（141），排水泵驱动装置（620）和包括该排水泵驱动装置（620）的衣物处理机器（100） 其中所述衣物处理机器包括用于操作排水泵的马达630，通过开关操作将直流（DC）电力转换成交流（AC）电力的逆变器（420），以及 （630），输出电流检测器（E）以检测流向马达（630）的输出电流（idc），以及控制器（430），用于控制逆变器（420），其中， 控制器430可以基于输出电流（idc）来计算电动机630的速度脉动，并且基于计算出的电动机630的速度脉动执行控制操作以改变电动机630的速度 ）。