ELECTRIC POWER STEERING APPARATUS

摘要

This electric power steering apparatus has a monitoring/controlling means which monitors an abnormality of a CPU and controls drive signals that drive a motor in the case where the CPU is abnormal. The monitoring/controlling means has a first control mode for stopping driving of the motor and a second control mode for continuously controlling the motor with provisional drive signals that regulate drive signals that substitute for CPU drive signals and when the monitoring/controlling means detects an abnormality of the CPU the monitoring/controlling means selects the second control mode and continuously controls the motor with the provisional drive signals that substitute for the CPU drive signals then after the control in the second control mode the monitoring/controlling means stops driving of the motor by selecting the first control mode.