Steering control device

A steering control device that controls a motor configured to generate power to be applied to a steering mechanism having a variable gear ratio rack and pinion, based on a command value calculated in accordance with a steering state, the steering control device comprising:

• a first calculating circuit that calculates a first component of the command value in accordance with a steering torque;
• a second calculating circuit that calculates a second component of the command value, as a compensation control amount for the first component, based on a steering angle;
• and
• a third calculating circuit that calculates a motor neutral point indicating a rotation angle of the motor corresponding to a steering neutral position, by subtracting a conversion value from a rotation angle of the motor detected by a relative angle sensor, the conversion value being calculated by converting a steering angle detected by an absolute angle sensor into a rotation angle of the motor, taking into account a specific stroke, and calculates the steering angle to be used in the second calculating circuit as an absolute angle, based on the calculated motor neutral point and the rotation angle of the motor detected by the relative angle sensor;
• wherein,
• the third calculating circuit calculates the motor neutral point when the steering angle detected by the absolute angle sensor falls within a predetermined angle range in which a difference between a theoretical specific stroke and an actual specific stroke with respect to the steering angle falls within an allowable range for the steering angle.