| 摘要 |
<p>PURPOSE: To provide a control device of a motor-driven power steering device by which a sense of incompatibility is not given from a steering wheel at steering reversing time. CONSTITUTION: Steering torque and car speed are inputted to an electric current command computing element, and operation is performed on an electric current command value being a control desired value of an electric current to be supplied to a motor 10, and after prescribed correction is performed, it is outputted to a motor driving circuit 41 through an electric current feedback circuit. A driving circuit 41 separates and converts an input signal into a PWM signal and an electric current direction signal, and FET1 FET4 of a H bridge circuit are controlled, and the magnitude and the electric current direction of a motor current are controlled. The magnitude and the direction of an electric current are detected in an electric current detecting circuit 24 by a voltage drop in resistors R1 and R2, and a detecting signal is fed back to the electric current feedback circuit, and the electric current command value is corrected. The electric current command value is also corrected by a proportional value of angular velocity of the motor and a differential value of the steering torque. A response characteristic at steering reversing time is improved, and a sense of incompatibility is not given to steering wheel operation.</p> |
