Patent ID: 9650067
Date: 2017-05-16
CPC Classifications: B62D

Claim:
1. A steering control apparatus comprising: an assist processing circuit that manipulates an electric power conversion circuit connected to a synchronous motor in order to generate a steering assist force using a torque of the synchronous motor; a tire-angle acquisition processing circuit that acquires one of a tire angle of a vehicle and an equivalent value of the tire angle; a rotation-angle acquisition processing circuit that acquires a rotation angle of the synchronous motor; a transformation processing circuit that executes a coordinate transformation on an intermediate variable obtained during calculation of a manipulation signal output to the electric power conversion circuit by the assist processing circuit, according to a control angle determined based on the rotation angle of the synchronous motor; and an angle manipulation processing circuit that sets a change rate of the control angle same as a change rate of the rotation angle acquired by the rotation-angle acquisition processing circuit when one of an absolute value of the tire angle and an absolute value of the equivalent value thereof is smaller than a prescribed value, and that changes the change rate of the control angle from the change rate of the rotation angle acquired by the rotation-angle acquisition processing circuit when the one of the absolute value of the tire angle and the absolute value of the equivalent value thereof is equal to or larger than the prescribed value.