公开(公告)号：US20210310829A1

公开(公告)日：2021-10-07

申请号：US17213535

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

Inventor： Seongki BAEK ,  Kiwook Lee ,  Sena Jeong

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

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：US20180023938A1

公开(公告)日：2018-01-25

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: G01B5/14 ,  F16C32/04 ,  G01M13/04

CPC classification number: G01B5/14 ,  F16C32/0446 ,  F16C32/0451 ,  F16C2362/52 ,  G01B5/146 ,  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.