公开(公告)号：US20230253842A1

公开(公告)日：2023-08-10

申请号：US18106654

申请日：2023-02-07

Applicant: SINFONIA TECHNOLOGY CO., LTD.

Inventor： Akihiro Ito ,  Nobuo Aruga ,  Tatsuya Nemoto ,  Tokio Morohoshi

IPC: H02K1/276 ,  H02K1/2783 ,  H01F41/02

CPC classification number: H02K1/2766 ,  H01F41/0253 ,  H02K1/2783 ,  H02K41/02

Abstract: Provided is a magnet that allows the orientation direction of main and auxiliary pole pieces to be set precisely and enables easy fabrication of flux focusing permanent magnet units having a high magnetic flux density A magnet 22 includes permanent magnet units 22a each including a main pole piece 221 and auxiliary pole pieces 222. The main pole piece 221 is composed of permanent magnet sheets 221a with substantially the same thickness stacked in the thickness direction. The auxiliary pole pieces 222 are composed of permanent magnet sheets 222a with substantially the same thickness stacked in the thickness direction and arranged at positions adjacent to the main pole piece 221 with orientation directions different from the orientation direction of the main pole piece 221 thereby to focus the magnetic flux at the main pole piece 221.