Patent ID: 6407524
Filing Date: 2002-06-18
Classification: B62D

Abstract:
A control apparatus for an electrical power steering apparatus for controlling a motor applying steering assistance force to a steering mechanism based on a current control value, said control apparatus comprising:means for detecting a steering torque occurring at a steering shaft, wherein said steering torque detecting means has a hysteresis width of 0.3 NÂ·m or less and a response frequency of 20 Hz or greater; means for detecting a motor current of said motor; means for calculating a steering assistance control value based on said steering torque that has been detected by said steering torque detecting means; and means for calculating said current control value based on said motor current and said steering assistance control value, wherein said control apparatus has a torque control frequency band of 20 Hz or greater, and wherein, based on said current control value, said control apparatus restrains a torque ripple of said motor within 10% of an average level of the torque.