| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric power steering device capable of performing satisfactory steering assist even when using a second current sensor of low resolution disposed as backup of a first current sensor. <P>SOLUTION: When abnormality of the first current sensor 31 is detected, an abnormality-time motor control amount calculation part 80 calculates a voltage instruction value V*. The abnormality-time motor control amount calculation part 80 sets a value (V0+V1+V2) obtained by adding a correction voltage V1 corresponding to the estimation value of a back electromotive voltage and an alternating current voltage V2 for estimating the back electromotive voltage to a fundamental voltage V0 proportional to steering torque tr. <P>COPYRIGHT: (C)2013,JPO&INPIT |
