| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the steering feeling and to reduce the manufacture cost, by adding the output signal of a gain circuit, and a damping signal found by damping the output signal of a polarity reversing circuit at a prescribed damping rate, outputting the adding value as an target value of the motor current, and finding the difference between the target value and the driving current of a motor in order to carry out a feedback control. SOLUTION: The torque detecting signal from a torque sensor 1 of the steering torque is given to an adding circuit 7 through a kinked line circuit 2, a phase compensating circuit 3 (a differential circuit), a microcomputer 22, and a resistance 6. A diode function signal output from the polygonal line circuit 2 is given to a gain variable circuit 5 (gain circuit), and a polarity reversing circuit 4. The polarity reversing circuit 4 adds the diode function signal and the differential signal of the torque detecting signal, and then, the added signal is polarity reversed, and output to the adding circuit 7. A differential amplifier circuit 9 outputs a current according to the difference between the current target value of the motor 24, and a motor driving current from a motor current detecting circuit 26, to a motor driving circuit 23.</p> |
