Patent ID: 8798862
Filing Date: 2014-08-05
Classification: B62D

Abstract:
1. An electric power steering apparatus for determining a target current value with an assistance controller based on a steering torque value which is detected by a steering torque sensor depending on operation of a steering wheel, and controlling a motor based on the target current value, the electric power steering apparatus comprising: hardware processor circuitry, comprising: a friction controller determining a friction torque value based on the steering torque value in order to apply friction to the operation of the steering wheel; a first friction generator generating a corrected steering torque value by correcting the steering torque value with the friction torque value; the assistance controller determining a first corrected target current value, which is to replace the target current value, based on the corrected steering torque value; a friction torque value-to-current value converter converting the friction torque value into a friction current value; and a target current corrector generating a second corrected target current value by correcting the first corrected target current value with the friction current value.