Shift range control device

A shift range control device for a shift range switching mechanism that is rotatably coupled with a shift actuator and includes a rotation member having a plurality of recesses and a locking portion rotationally positioning the rotation member by being locked to one of the plurality of recesses, the shift range control device configured to control a motor of the shift actuator to switch a shift range, the shift range control device comprising:

• an angle acquisition unit configured to acquire a rotation angle of an output shaft of the shift actuator;
• a valley position learning unit configured to perform valley position learning for learning, as a valley position, the rotation angle of the output shaft obtained when the locking portion is positioned at a valley bottom of the one of the plurality of recesses based on a value acquired by the angle acquisition unit;
• a temperature acquisition unit configured to acquire an environmental temperature of the shift range switching mechanism;
• and
• a drive voltage-current correction unit configured to reduce a drive voltage or a drive current of the motor with reduction in the environmental temperature during the valley position learning by the valley position learning unit.

A shift range control device for a shift range switching mechanism that is rotatably coupled with a shift actuator and includes a rotation member having a plurality of recesses and a locking portion rotationally positioning the rotation member by being locked to one of the plurality of recesses, the shift range control device configured to control a motor of the shift actuator to switch a shift range, the shift range control device comprising:

• an angle acquisition unit configured to acquire a rotation angle of an output shaft of the shift actuator;
• a valley position learning unit configured to perform valley position learning for learning, as a valley position, the rotation angle of the output shaft obtained when the locking portion is positioned at a valley bottom of the one of the plurality of recesses based on a value acquired by the angle acquisition unit;
• a temperature acquisition unit configured to acquire an environmental temperature of the shift range switching mechanism;
• and
• a rotation number correction unit configured to reduce a rotation number of the motor with reduction in the environmental temperature during the valley position learning by the valley position learning unit.