Patent ID: 7624838

Claim:
An electric power steering control apparatus comprising: a torque sensor that detects a steering torque applied by a driver to a steering system; a motor that generates an assist force to said steering system; an input processing section that takes in a steering torque signal from said torque sensor; an output processing section that drives said motor; and a processing unit that provides an instruction to said output processing section based on said steering torque signal; wherein said processing unit includes: an impression voltage calculation section that calculates an impression voltage to said motor in accordance with said steering torque signal; and an impression voltage limiting section that limits said impression voltage to a predetermined limit value or less corresponding to both the direction and the magnitude of said steering torque signal, wherein said impression voltage limiting section prevents said impression voltage from exceeding said predetermined limit value, which is a predetermined upper limit, such that said impression voltage is confined within a predetermined normal impression voltage region.