Patent ID: 6883637

Claim:
An electric power steering device for applying a steerage assisting power to the steering mechanism of a vehicle by driving an electric motor in accordance with a steering torque given by operation means for steering said vehicle, said power steering device comprising: a torque sensor for detecting said steering torque; a target value setting unit for setting as a target value the value of an electric current to be fed to said electric motor; and a control unit for feedback-controlling said electric motor on the basis of a current deviation between said current target value and the current to flow through said electric motor; wherein said target value setting unit includes: a basic assist current setting unit for accepting said steering torque from said torque sensor, to set a basic assist current value for determining a current to be fed to said electric motor, on the basis of the steering torque accepted; and a phase compensating unit for performing the phase compensation of said basic assist current value, to output the value of the current to be fed to said electric motor.