摘要 |
PROBLEM TO BE SOLVED: To suppress a shock feeling of a driver even when an ignition switch is turned off while torque is detected from a steering torque detecting means. SOLUTION: In an electric power steering device comprising a steering condition detecting means, a motor control signal generating means 3, a motor driving means, a motor current detecting means 6, a motor or controller temperature detecting means 12, a motor maximum current limiting means to determine a motor maximum current limit value 11 from the motor control signal generating means and the temperature detecting means, a failure determining means, and an operation stop detecting means 7 to detect an operation stop command of the motor control signal generating means, and having a mechanism to validate the motor maximum current control means based on the output of the operation stop detecting means 7, a motor control signal to the motor driving means is controlled so as not to exceed the motor maximum current limit value, and the motor maximum current limit value is updated if the motor control signal value is not more than the previous motor control signal value. COPYRIGHT: (C)2004,JPO |