公开(公告)号：US20240287974A1

公开(公告)日：2024-08-29

申请号：US18569380

申请日：2022-05-18

申请人： Hitachi Astemo, Ltd.

发明人： Junnosuke NAKATSUGAWA ,  Masaki KOYAMA ,  Hiroshi SAKAI ,  Kan KOBAYASHI ,  Yoshinori KAWAI

IPC分类号： F04B17/03 ,  B60G11/27 ,  F25B31/02 ,  F25D11/02 ,  H02K33/16

CPC分类号： F04B17/03 ,  B60G11/27 ,  F25B31/023 ,  H02K33/16 ,  B60G2202/152 ,  F25D11/02

摘要： A linear motor for a compressor having asymmetric load characteristics in both directions of a stroke, improves the service life of a bearing, and reduces a total length of a system. The linear motor includes a movable element having a magnetic pole frame and a plurality of field element poles, and a plurality of magnetic pole teeth around which windings are wound and that are provided so as to sandwich the movable element, and the movable element and the magnetic pole teeth are relatively displaced. The plurality of field element poles include primary magnets arranged between the plurality of magnetic pole teeth and secondary magnets arranged externally relative to spaces between the plurality of magnetic pole teeth in either direction of the relative displacement. A neck part of the magnetic pole frame connected to a bearing is arranged externally in the other direction of the relative displacement direction.