公开(公告)号：WO2012137465A1

公开(公告)日：2012-10-11

申请号：PCT/JP2012/002274

申请日：2012-04-02

Applicant: NIDEC CORPORATION ,  NAKANISHI, Keita ,  MIGITA, Takayuki ,  AONO, Masato ,  HAGA, Hidehiro

Inventor： NAKANISHI, Keita ,  MIGITA, Takayuki ,  AONO, Masato ,  HAGA, Hidehiro

IPC: H02K1/27 ,  H02K15/03 ,  H02K16/02

CPC classification number: H02K1/274 ,  H02K1/278 ,  H02K15/03 ,  H02K16/02 ,  Y10T29/49012

Abstract: The rotor unit has a plurality of rotating bodies which is arranged along a central axis. Each of the plurality of rotating bodies has an annular rotor core which surrounds the central axis, a plurality of magnets which is arranged in the circumferential direction around the rotor core, and a holder which holds the magnets. Further, the holder has a plurality of partitioning portions each axially extending between the magnets. The axial dimension of the partitioning portion is longer than the axial dimension of the magnet which is held by the partitioning portions. Further, the plurality of rotating bodies is disposed in a state where the circumferential positions of the plurality of magnets are out of alignment. In this way, contact between the magnets is prevented by the partitioning portion. Therefore, damage to each magnet is suppressed.

Abstract translation: 转子单元具有沿中心轴线布置的多个旋转体。 多个旋转体中的每一个具有围绕中心轴线的环形转子铁芯，围绕转子铁心沿圆周方向配置的多个磁体和保持磁体的保持架。 此外，保持器具有多个在磁体之间轴向延伸的分隔部。 分隔部的轴向尺寸比由分隔部保持的磁体的轴向尺寸长。 此外，多个旋转体设置在多个磁体的周向位置不对准的状态。 以这种方式，通过分隔部分防止了磁体之间的接触。 因此，能够抑制对各磁体的损伤。