ELECTRONIC POWER STEERING APPARATUS

摘要

Provided is an electronic power steering apparatus that, when applied in a vehicle having a turning mechanism with a less than ideal Ackerman ratio, prevents the driver from having uncomfortable feeling by bringing the steering angle - steering reaction force characteristics in the case of low vehicle speed close to ideal Ackerman characteristics. A control apparatus (200A) of the electronic power steering apparatus includes a low-vehicle-speed steering reaction force control unit (300A). The low-vehicle-speed steering reaction force control unit (300A) sets a steering angle sensitive target steering torque KT(?H) in a target steering torque calculating unit (280) on the basis of a steering angle ?H. A subtracter (281) calculates a torque deviation between the target steering torque KT(?H) and a steering torque T. A current conversion unit (282) calculates a target current value ITFB1 on the basis of the torque deviation. A q-axis target current value ITG1 that provides an auxiliary steering force by an electric motor (11) is corrected to a q-axis target current value Iq* by a target current value ITFB3, which is obtained by decreasing variation of the target current value ITFB1.