| 摘要 |
A control device of a power steering apparatus which generates hydraulic pressure for assisting the operation of a steering wheel of a vehicle by an oil pump that is driven by an electric motor is provided with a target rotation speed setting means, a motor control means, and a processing means. The target rotation speed setting means sets the target rotation speed of the electric motor on the basis of the vehicle speed of the vehicle, which is detected by a vehicle speed sensor, and the steering angular speed of the steering wheel, which is detected by a steering angular speed sensor. The motor control means controls the electric motor so that the rotation speed of the electric motor becomes the target rotation speed. The processing means detects an end contact state in which steering force is applied although the steering wheel reaches a mechanical operation limit when the drive load of the electric motor exceeds a threshold load and the time period when the state in which the steering angular speed is lower than a threshold angular speed is established reaches a threshold time period, and performs a protection operation for preventing the target rotation speed setting means from increasing the target rotation speed.
|
