| 摘要 |
PROBLEM TO BE SOLVED: To provide a controlling device for an electric power steering device comparing a motor electric current estimated value found by computing with an actual motor electric current value for monitoring an operating condition of a driving system. SOLUTION: A motor electric current command value Ir(s) as a control target value of a motor output is inputted to a feed-forward compensator 51 to be inputted to a control object (motor) 50 via an adder 52 and an addition element 53. A motor electric current value Id(s) of the control object 50 can be computed according to a predetermined computing equation on the basis of the motor electric current command value Ir(s). The computed motor electric current value Id(s) is used as a motor electric current estimated value Ied(s) to be compared with the motor electric current value Id(s) (actual electric current value i), and when a difference e between them exceeds a previously set value, it is determined that a failure occurs in the driving system. |
