System for controlling electric power steering

摘要

A challenge of the present invention is to provide a system for controlling electric power steering which does not allow a pulsing motion to occur when a steering wheel W is positioned around the middle position. To answer the challenge, the system has signal level decision means 16 for selecting a reference level or an amplification level in response to a steering-torque detection signal or a motor current command-value signal; first adjustment means 17 for carrying out the selection of the reference level or the amplification level for the signal level of the motor current command-value signal; second adjustment means 18 for carrying out the selection of the reference level or the amplification level for the signal level of the motor current detection signal; Ad conversion means 15 for converting the signal sent from the second adjustment signal into a digital signal; and third adjustment means 19 for adjusting the motor current control signal to be at the reference level. Each of the first adjustment means 17 and the second adjustment means 18 decides the signal level in response to a signal level decision signal, and the third adjustment means 19 adjusts the motor current control signal to be at the reference level in response to the signal level decision signal, and then inputs the adjusted signal to output control means 11.