| 摘要 |
Provided is an electric power steering control device capable of performing damping control without current detection to perform stable damping control even when a target current and an actual current value differ from each other. The electric power steering control device includes steering torque detection means for detecting a steering torque, a torque controller for computing an assist torque current, a motor for generating a torque for assisting the steering torque, rotation speed estimation means for estimating a rotation speed of the motor, and a damping controller for computing a damping current by using an estimated value of the rotation speed of the motor. The rotation speed estimating means includes steering component removing means for steering torque, for removing a component due to steering from an output of the steering torque detection means, rotation angle corresponding value computing means for multiplying an output of the steering component removing means for steering torque by an inverse number of a rigidity of a torsion bar and −1 to compute a value corresponding to a rotation angle, and a rotation angle differentiator for differentiating an output of the rotation angle corresponding value computing means to compute a value corresponding to a rotation angular velocity.
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