ELECTRIC POWER STEERING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an electric power steering device which can secure current responsiveness while suppressing vibration caused by decoupling control.

SOLUTION: When decoupling control to compensate interference components of a d-axis command voltage and a q-axis command voltage is carried out, a corrected angular velocity is determined so as to reduce influences of an angular velocity of a rotator in the q-axis decoupling correction value when the angular velocity of the rotator is equal to or less than a predetermined value, and also a corrected angular velocity is determined so as to obtain a change rate of the angular velocity of the rotator in the d-axis decoupling correction value and the q-axis decoupling correction value to be almost equal to the change rate of the angular velocity of the rotator when the angular velocity of the rotator is larger than the predetermined value.

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