公开(公告)号：US20190077440A1

公开(公告)日：2019-03-14

申请号：US15562496

申请日：2016-03-29

Applicant: Nidec Corporation

Inventor： Yoshiaki YAMASHITA ,  Tomoyuki KUBOTA

IPC: B62D5/04 ,  H02K5/22 ,  H02K3/52 ,  H02K11/30 ,  H02K5/10

Abstract: An aspect of a motor of the invention includes a rotor having a shaft, a stator, a bearing supporting the shaft, a cylindrical motor housing holding the stator and opening to one side, a bearing holder positioned on one side of the stator and holding the bearing, a control circuit board positioned on one side of the bearing holder, a rotation sensor attached to the control circuit board, a control circuit board housing positioned on one side of the motor housing and housing the control circuit board, a sensor magnet positioned closer to one side than the bearing and attached to the shaft, and a nonmagnetic contamination cover at least a part of which is positioned between the control circuit board and the bearing holder in the axial direction and which covers one side of the shaft, the bearing, and the sensor magnet.