公开(公告)号：EP4167438A1

公开(公告)日：2023-04-19

申请号：EP22183247.0

申请日：2022-07-06

Applicant: LG Electronics Inc.

Inventor： KIM, Jaeho ,  MIN, Younggeun ,  LEE, Jiwan ,  HA, Kyungho

IPC: H02K1/276

Abstract: A flux concentrate type rotor according to an embodiment of the present disclosure, a shaft; a rotor core; and an arc type permanent magnet having an inner diameter portion and an outer diameter portion, wherein the rotor core includes an annular ring-shaped inner diameter portion core having a shaft through hole into which the shaft is inserted, a plurality of outer diameter portion cores arranged along a circumferential direction of the inner diameter portion core on an outer circumferential surface of the inner diameter portion core, and spaced apart from each other to form permanent magnet insertion portion for accommodating the permanent magnet, and a plurality of bridges arranged along the circumferential direction of the inner diameter portion core to correspond to each of the outer diameter portion cores, and connect each of the outer diameter portion cores to the inner diameter portion core, and wherein the outer diameter portion core has a first cutout portion positioned at a lower end.

公开(公告)号：EP4503392A1

公开(公告)日：2025-02-05

申请号：EP23860561.2

申请日：2023-01-06

Applicant: LG Electronics Inc.

Inventor： KIM, Jaeho ,  HWANG, Hongsik ,  MIN, Younggeun ,  LEE, Jiwan ,  HA, Kyungho

IPC: H02K1/276 ,  H02K11/215

Abstract: A flux-concentrated motor according to an embodiment of the present specification comprises: a flux-concentrated rotor having multiple arc-type permanent magnets embedded therein, each arc-type permanent magnet comprising an inner diameter portion formed with a first curvature, an outer diameter portion formed with a second curvature, and a connecting portion for connecting an end of the inner diameter portion to an end of the outer diameter portion; and a printed circuit board having a Hall sensor for identifying the position of the arc-type permanent magnets. In a state in which the flux-concentrated rotor is D-axis aligned, the Hall sensor is positioned on a pitch circle diameter (PCD) of the Hall sensor in a position shifted from the D-axis by a first mechanical angle, and the first mechanical angle is the sum of second and third mechanical angles.
The second mechanical angle refers to an angle of movement to be made by a Hall sensor in order to satisfy a reference electric angle in connection with a flux-concentrated motor comprising a flux-concentrated rotor having multiple bar-type permanent magnets embedded therein and having the same number of poles and PCD as the above flux-concentrated rotor. The third angle refers to an angle between the D-axis and a point of intersection between the PCD of the Hall sensor and a first virtual line connecting transverse centers of the arc-type permanent magnets in the longitudinal direction of the arc-type permanent magnets.