公开(公告)号：US20190199177A1

公开(公告)日：2019-06-27

申请号：US16232084

申请日：2018-12-26

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yutaka UEMATSU ,  Jaehyun KIM ,  Toshiaki NAKAMURA ,  Shuichi KINJO ,  Hiroshi SHIRAI

IPC: H02K11/215 ,  H02K7/116

Abstract: This disclosure provides an electric actuator and a rotation control mechanism. The electric actuator includes: a motor; a speed reduction mechanism; an output part; and a rotation detection device. The output part extends in an axial direction and is disposed on one side in the axial direction with respect to a motor shaft of the motor. The rotation detection device has: a magnet that is fixed to the output part and extends in a circumferential direction of the output part; and a rotation sensor that faces the magnet in the axial direction or in a radial direction. The magnet has multiple magnetic poles disposed in the circumferential direction. At least one magnetic pole of the magnet is disposed at a predetermined angular position with respect to an angle reference position of the output part in a rotation direction.