Patent ID: 9637166
Date: 2017-05-02
CPC Classifications: B62D

Claim:
1. An electric power steering apparatus that calculates a first motor current command value based on a steering torque and a vehicle velocity, performs an assist control of a steering system by driving a motor based on said first motor current command value, and has a function for switching between an automatic steering control and a manual steering control, comprising: a target steering angle correcting section that outputs a target steering angle correction value for said steering torque; an addition section that adds said target steering angle correction value with a target steering angle and outputs a sum; a steering angle control section that calculates a second motor current command value based on said corrected target steering angle from said addition section, an actual steering angle and a motor angular velocity of said motor; and a switching section that inputs said first motor current command value and said second motor current command value to switch, wherein said target steering angle correcting section has a dead band in a region where said steering torque is small and outputs said target steering angle correction value so as to increase in a direction which is same as an increasing direction of said steering torque, wherein said steering angle control section comprises: wherein said subtraction section outputs said second motor current command value, wherein said switching section is switched depending on a switching command of said automatic steering control and said manual steering control, and said motor is drive-controlled based on said second motor current command value in said automatic steering control.