公开(公告)号：US20250015652A1

公开(公告)日：2025-01-09

申请号：US18591473

申请日：2024-02-29

Applicant: LG Electronics Inc.

Inventor： Sangjoon EUM ,  Jeonghyun CHO ,  Songe PARK ,  Gyujong JEONG ,  Kyungho HA

IPC: H02K1/2791 ,  D06F37/30

Abstract: A magnet includes one or more polar regions each having an arc shape and arranged in a circumferential direction. A magnetic focus center of each polar region is different from a center of an inner diameter of the one or more polar regions. A value obtained by dividing (i) dm, a distance from a straight line connecting ends of a first magnetic center line of the one or more polar regions to a center of the first magnetic center line, by (ii) db, a distance from a straight line connecting ends of a second magnetic center line of the one or more polar regions to a center of the second magnetic center line, satisfies certain values based on a number of the polar regions. db is determined based on the one or more polar regions having a magnetic focus center that corresponds to the center of the inner diameter.

公开(公告)号：US20250014797A1

公开(公告)日：2025-01-09

申请号：US18591502

申请日：2024-02-29

Applicant: LG Electronics Inc.

Inventor： Gyujong JEONG ,  Sangjoon EUM ,  Songe PARK ,  Jeonghyun CHO ,  Kyungho HA

IPC: H01F13/00 ,  H01F7/02

Abstract: A magnet orientation device includes an upper plate disposed on a magnet raw material, a lower plate disposed below the magnet raw material, and dies disposed on sides of the magnet raw material. The upper plate has a convex upward arc shape. The upper plate includes a first magnetic region and a first non-magnetic region that surround the first magnetic region and the lower plate includes a second magnetic region and a second non-magnetic region that surround the second magnetic region. A lower surface of the first magnetic region provides a plurality of grooves and an upper surface of the second magnetic region provides a plurality of protrusions. A horizontal length of the first magnetic region is greater than a horizontal length of the magnet raw material and a horizontal length of the second magnetic region is equal to or less than the horizontal length of the magnet raw material.