公开(公告)号：US10808711B2

公开(公告)日：2020-10-20

申请号：US15684557

申请日：2017-08-23

Applicant: LG ELECTRONICS INC.

Inventor： Namsoo Lee ,  Solji Ryu ,  Kiwook Lee ,  Seongmin Jang

IPC: F25B49/02 ,  F04D27/00 ,  F04D29/053 ,  F04D29/058 ,  F04D29/28 ,  F25B31/02 ,  G01B7/14 ,  F25B1/053 ,  F25B39/00

Abstract: The present invention provides a compressor that includes: one or more impellers that axially suck and centrifugally compress a refrigerant; a rotary shaft that is connected with the impeller and a motor for rotating the impeller; a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate; a gap sensor that senses the distance from the rotary shaft; and a controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor. The controller can sense movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and can determine whether there is abnormal wire connection on the basis of the information.

公开(公告)号：US10088435B2

公开(公告)日：2018-10-02

申请号：US15470108

申请日：2017-03-27

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Lee ,  Chanmyung Park ,  Namsoo Lee ,  Jinhee Jeong

IPC: G01N21/00 ,  G01N21/954 ,  F25B31/02 ,  F25B39/00 ,  F25B49/02 ,  G01M15/14 ,  F25B39/02 ,  F25B39/04 ,  F25B45/00

Abstract: Disclosed is a detection device for detecting a turbomachine including an opening, the detection device comprises: a flange configured to close the opening; and an endoscope assembly including an endoscope body, a detector extending from the endoscope assembly and inserted into an internal space of the turbomachine through the flange and an extension part connecting the endoscope body and the detector.

公开(公告)号：US11674721B2

公开(公告)日：2023-06-13

申请号：US17253213

申请日：2019-07-10

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Lee ,  Namsoo Lee ,  Chanmyung Park

IPC: F25B31/00 ,  F28F3/12

CPC classification number: F25B31/006 ,  F28F3/12

Abstract: A refrigerator according to an embodiment of the present invention includes: a compressor configured to compress a refrigerant; and an inverter module configured to control the compressor, wherein the inverter module includes: a heatsink provided with a cooling passage through which coolant passes; a coolant inlet connected to the heatsink to communicate with an inlet of the cooling passage; a coolant outlet connected to the heatsink to communicate with an outlet of the cooling passage; at least one insulated gate bipolar transistor (IGBT) disposed on a top surface of the heatsink; and at least one diode disposed to be spaced apart from the IGBT on the top surface of the heatsink, wherein the cooling passage includes: an IGBT cooling passage that is closer to the coolant inlet among the coolant inlet and the coolant outlet; and a diode cooling passage that is closer to the coolant outlet among the coolant inlet and the coolant outlet, wherein the diode cooling passage is disposed behind the IGBT cooling passage in a flow direction of the coolant.

公开(公告)号：US10480922B2

公开(公告)日：2019-11-19

申请号：US15615064

申请日：2017-06-06

Applicant: LG ELECTRONICS INC. ,  THE INDUSTRY & ACADEMIC COOPERATION IN CHUNGNAM NATIONAL UNIVERSITY

Inventor： Namsoo Lee ,  Myounggyu Noh ,  Soyoon Kim ,  Seongmin Jang ,  Jinhee Jeong ,  Seongki Baek ,  Sunggyu Nam

IPC: H02K7/09 ,  G01B5/14 ,  F16C32/04 ,  G01M13/04

Abstract: A method of measuring a center error between bearings includes disposing both sides of a rotation shaft on inner circumferential surfaces of a magnetic bearing and a backup bearing, applying current to the magnetic bearing to produce movement of the rotation shaft, determining a contact point between the rotation shaft and the backup bearing according to movement of the rotation shaft, determining a final target value using the contact point and predetermined position information of the magnetic bearing, determining a magnetic center of the magnetic bearing through the final target value, comparing the magnetic center of the magnetic bearing and a mechanical center of the backup bearing to determine a center error, and aligning the magnetic center of the magnetic bearing and the mechanical center of the backup bearing based on the determined center error.