Electric power steering apparatus

摘要

An electric power steering apparatus includes a control unit 12 for outputting an electric motor control signal VO to control an electric motor 8 for adding an auxiliary steering torque, in response to at least the manual steering torque signal T from a torque sensor TS. The control unit 12 carries out a control to limit a maximum value of the electric motor control signal VO in response to an electric motor current signal IMO sent from an electric motor current detecting unit 14. The control unit 12 includes a maximum value limitation indicating unit 26 for measuring the number of times of a maximum value limitation of the electric motor control signal VO and has such a structure that conditions for starting the maximum value limitation of the control signal VO are set to be more strict at a first time than those at a second time and thereafter.