| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor-driven power steering control device capable of always reducing a torque ripple of an assist motor even if the offset value of a current detecting means fluctuates. SOLUTION: This motor-driven power steering control device is provided with a target current computing means 9 for inputting steering torque and travel speed to command a supply current to a brushless motor 5 for assisting steering force, a current detecting means 7 for detecting a motor current; a driving control means 10 for setting supply voltage of the brushless motor 5 from the deviation between the command value of the target current computing means 9 and the detection value of the current detecting means 7; an offset correction value learning determining means 11 determining on the basis of the command value of the target current computing means 9 to command learning of the correction value to the offset value of a current detected by the current detecting means 7; a reference voltage generating means 18 for outputting reference voltage according to the command of the offset correction value learning determining means 11; and an offset correcting means 12 for learning and storing the offset correction value from the motor current when applying the reference voltage, to correct the offset value of the current detecting means 7. |
