| 摘要 |
<p>Provided is an electric power steering device (100) wherein mechanical friction is electrically provided. A steering torque value (VT3) is detected by a steering torque sensor (30) according to the operation of a steering wheel (2). An assist current value (Ia) is calculated by an assist control section (51) on the basis of the aforementioned steering torque value (VT3). A target current value (Itar) based on the aforementioned assist current value (Ia) is to be determined. For this purpose, with the aim of providing friction with regard to the operation of the steering wheel (2), there are provided a friction control section (54) and a friction torque value / current value conversion section (55). Thereby a corrected steering torque value (VT3 - VTfr) is generated, and furthermore, a second corrected target current value (Ia2) is created, the aforementioned corrected steering torque value (VT3 - VTfr) being obtained by correcting the steering torque value (VT3) by means of a friction torque value (VTfr), and the aforementioned second corrected target current value (la2) being obtained by correcting a first corrected target current value (Ia1) by means of a friction current value (Ifr). Subsequently, the target current value (Itar) is generated, resulting in a motor (11) being subjected to driving control.</p> |
