公开(公告)号：US20250149940A1

公开(公告)日：2025-05-08

申请号：US18726194

申请日：2023-01-06

Applicant: LG ELECTRONICS INC.

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

IPC: H02K1/276 ,  H02K11/215 ,  H02K21/16 ,  H02K29/03

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.

公开(公告)号：US20240275224A1

公开(公告)日：2024-08-15

申请号：US18221606

申请日：2023-07-13

Applicant: LG Electronics Inc.

Inventor： Younggeun MIN ,  Hongsik HWANG ,  Kyungmo YU ,  Jaeho KIM ,  Kyungho HA

IPC: H02K1/276

CPC classification number: H02K1/2773 ,  H02K2213/03

Abstract: A flux concentrate type rotor includes a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core, and a plurality of arc type permanent magnets each inserted between two adjacent outer diameter portion cores. Each of the plurality of bridges includes a first straight portion extending in a radial direction of the rotor core, and a first angle θ1 between a first extension line connecting a center of the arc type permanent magnet and a center of the inner diameter portion core and a second extension line connecting a center of the first straight portion of the bridge and the center of the inner diameter portion core satisfies: θ1=5.75°±4°.

公开(公告)号：US20240266894A1

公开(公告)日：2024-08-08

申请号：US18221609

申请日：2023-07-13

Applicant: LG Electronics Inc.

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

IPC: H02K1/276

CPC classification number: H02K1/2773 ,  H02K2213/03

Abstract: A flux concentrate type motor includes a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core; and a plurality of arc type permanent magnets each inserted between two adjacent outer diameter portion cores. A first angle θ1 formed between a first extension line connecting a center of the arc type permanent magnet and a center of the inner diameter portion core and a second extension line connecting a center of an outer arc of the outer diameter portion core and the center of the inner diameter portion core may satisfy: θ1=k1×PA (kl is 0.16 to 0.55, and PA=360°/(2×P(a number of pole of the permanent magnet)), where the first angle θ1 may be between 4° and 10°.