公开(公告)号：US11512980B2

公开(公告)日：2022-11-29

申请号：US17136624

申请日：2020-12-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jun Hyuk Choi ,  Joon Sung Park ,  Jin Hong Kim ,  Byong Jo Hyon ,  Yong Su Noh ,  Dong Myoung Joo

IPC: G01D5/14

Abstract: This application relates to an absolute position detection device and detection method of a rotating body. In one aspect, the device includes first row magnets coupled to a rotating body to rotate together and having n pole pairs, and second row magnets coupled to the rotating body to rotate together and having (n+1) pole pairs. The device also includes a first Hall sensor installed adjacent to the first row magnets and configured to detect a change in magnetism according to rotation of the first row magnets. The device further includes a second Hall sensor installed adjacent to the second row magnets and configured to detect a change in magnetism according to rotation of the second row magnets. The device further includes a controller configured to measure an absolute position of the rotating body using signals output from the first and second Hall sensors.

公开(公告)号：US11639860B2

公开(公告)日：2023-05-02

申请号：US17136931

申请日：2020-12-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jun Hyuk Choi ,  Joon Sung Park ,  Jin Hong Kim ,  Byong Jo Hyon ,  Yong Su Noh ,  Dong Myoung Joo

IPC: G01D5/14 ,  G01D5/245 ,  F16C41/00

Abstract: This application relates to an absolute position detection device and detection method of a rotating body using a magnetic material. The device may include magnets coupled to a rotating body and configured to rotate together and having n pole pairs, wherein n is a natural number and (n+1) magnetic materials arranged adjacent to the magnets, spaced apart from each other by a predetermined interval, and configured to rotate together with the rotating body. The device may also include a first Hall sensor spaced apart from the magnets, installed to allow the magnetic materials to rotate in a space between the first Hall sensor and the magnets and configured to output a first signal based on the magnets when the magnetic materials approach the first Hall sensor. The device may further include a controller configured to measure an absolute position of the rotating body using the first signal.