公开(公告)号：US11101707B2

公开(公告)日：2021-08-24

申请号：US15560813

申请日：2016-03-24

Applicant: NITTO DENKO CORPORATION

Inventor： Makoto Fujihara ,  Kenichi Fujikawa ,  Takashi Yamamoto ,  Shoichiro Saito

IPC: H02K1/27 ,  B22F3/105 ,  H02K15/03 ,  H01F7/02 ,  H02K1/22 ,  C22C38/00 ,  H01F1/053 ,  H01F1/057 ,  H01F1/08 ,  H01F41/02

Abstract: This invention provides for a rare-earth permanent magnet-forming sintered body obtained by integrally sintering magnet material particles containing a rare-earth substance while shaping the magnet material particles, a rare-earth permanent magnet obtained by magnetizing the sintered body, and a rotary machine in which the permanent magnet is embedded.

公开(公告)号：US11239014B2

公开(公告)日：2022-02-01

申请号：US15560812

申请日：2016-03-24

Applicant: NITTO DENKO CORPORATION

Inventor： Makoto Fujihara ,  Toshinobu Hoshino ,  Shoichiro Saito ,  Kenichi Fujikawa

IPC: H01F7/02 ,  H02K41/03 ,  H02K15/03 ,  H01F41/02 ,  H01F13/00 ,  H02K41/02 ,  H01F1/057

Abstract: Provided are a rare-earth magnet capable of realizing a high magnetic flux amount without using any back yoke, and a linear motor comprising a movable element using the rare-earth permanent magnet. A rare-earth permanent magnet-forming sintered body for forming a permanent magnet is integrally sintered while being formed into a given three-dimensional shape with a lengthwise cross-section having a first surface extending in a length direction thereof, a second surface lying at a distance from the first surface in a thickness direction thereof and extending in the length direction, and an edge surface of each of lengthwise opposite ends thereof. This sintered body is formed such that easy magnetization axes of the magnet material particles included in a central region thereof are oriented in such a manner as to be directed along an arch-shaped path.

公开(公告)号：US10573440B2

公开(公告)日：2020-02-25

申请号：US15771125

申请日：2016-11-17

Applicant: NITTO DENKO CORPORATION

Inventor： Makoto Fujihara ,  Kenichi Fujikawa ,  Shoichiro Saito

IPC: H01F1/08 ,  H01F7/02 ,  H01F41/02 ,  H02K1/02 ,  H02K1/27

Abstract: This invention provides for a rare-earth permanent magnet-forming sintered body having an integral sintered structure of magnet material particles containing a rare-earth substance. The integral sintered structure is formed in a three-dimensional shape having: a cross-section with a shape defined by a radially outer-side arc-shaped surface having a first curvature radius, a radially inner-side arc-shaped surface having a second curvature radius less than the first curvature radius and having an arc shape concentric with the outer-side arc-shaped surface; and a first end face and a second end face each of which is a radially-extending face along a virtual radial line extending from a curvature center of the arc shapes; and an axial length extending in a direction perpendicular to the cross-section.