公开(公告)号：US20180058460A1

公开(公告)日：2018-03-01

申请号：US15684557

申请日：2017-08-23

Applicant: LG ELECTRONICS INC.

Inventor： Namsoo LEE ,  Solji RYU ,  Kiwook LEE ,  Seongmin JANG

IPC: F04D27/00 ,  F25B31/02 ,  F04D29/058 ,  F04D29/053 ,  G01B7/14

CPC classification number: F04D27/001 ,  F04D29/053 ,  F04D29/058 ,  F04D29/286 ,  F25B1/053 ,  F25B31/026 ,  F25B39/00 ,  F25B49/025 ,  F25B2339/0242 ,  F25B2339/047 ,  F25B2400/077 ,  G01B7/14

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：US20190277300A1

公开(公告)日：2019-09-12

申请号：US16329180

申请日：2016-10-21

Applicant: LG ELECTRONICS INC.

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

IPC: F04D29/058 ,  F04D29/056 ,  F25B31/02

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.