公开(公告)号：US11572885B2

公开(公告)日：2023-02-07

申请号：US17210850

申请日：2021-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Seongki Baek ,  Kiwook Lee ,  Sena Jeong

IPC: F04D27/00 ,  F04D27/02 ,  F04D29/043 ,  F04D29/051 ,  F04D29/66

Abstract: A compressor is provided. The compressor according to the present disclosure includes: one or more impellers suctioning and compressing refrigerant; a motor rotating the impeller; a rotation shaft to which the impeller and the motor are connected; a gap sensor measuring a displacement change of the rotation shaft as a frequency change; a temperature compensation sensor determining a frequency compensation value according to a temperature change around the gap sensor; and a control unit calculating a displacement amount of the rotation shaft by reflecting the frequency compensation value provided by the temperature compensation sensor and the frequency change measured by the gap sensor.

公开(公告)号：US11909296B2

公开(公告)日：2024-02-20

申请号：US17223699

申请日：2021-04-06

Applicant: LG ELECTRONICS INC.

Inventor： Sena Jeong ,  Kiwook Lee ,  Seongki Baek

IPC: H02K7/09 ,  H02K5/22 ,  H02K3/52

CPC classification number: H02K7/09 ,  H02K3/522 ,  H02K5/22 ,  H02K2203/12

Abstract: A magnetic bearing is provided. The magnetic according to the present disclosure includes: a stator core disposed to surround a central axis; a plurality of bobbins coupled to the stator core; a coil wound around the bobbin; and a positioning member coupled to the plurality of bobbins and determining positions of the plurality of bobbins, and the positioning member has a circular shape centered on a central point.

公开(公告)号：US11920959B2

公开(公告)日：2024-03-05

申请号：US17213535

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

Inventor： Seongki Baek ,  Kiwook Lee ,  Sena Jeong

IPC: G01D5/20 ,  H01F27/02 ,  H01F27/28

CPC classification number: G01D5/2086 ,  H01F27/02 ,  H01F27/288

Abstract: The present disclosure relates to a displacement sensor. A displacement sensor according to the embodiment of the present disclosure includes a coil structure consisting of wound coil, a shield member formed to surround an outer periphery of the coil structure and a housing, wherein the housing comprises an upper side wall part surrounding an outer periphery of the shield member and a lower side wall part formed to extend from the upper side wall part, wherein an inner circumferential surface of the lower side wall part is protruded toward the inside of the housing more than an inner circumferential surface of the upper side wall part, wherein an outer circumferential surface of the lower side wall part may include a depressed region formed to be depressed into the inside of the housing by a predetermined depth.

公开(公告)号：US20210301828A1

公开(公告)日：2021-09-30

申请号：US17210850

申请日：2021-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Seongki Baek ,  Kiwook Lee ,  Sena Jeong

IPC: F04D27/00 ,  F04D29/051 ,  F04D29/043 ,  F04D29/66 ,  F04D27/02

Abstract: A compressor is provided. The compressor according to the present disclosure includes: one or more impellers suctioning and compressing refrigerant; a motor rotating the impeller; a rotation shaft to which the impeller and the motor are connected; a gap sensor measuring a displacement change of the rotation shaft as a frequency change; a temperature compensation sensor determining a frequency compensation value according to a temperature change around the gap sensor; and a control unit calculating a displacement amount of the rotation shaft by reflecting the frequency compensation value provided by the temperature compensation sensor and the frequency change measured by the gap sensor.

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.