Patent ID: 6679350
Filing Date: 2004-01-20
Classification: B62D

Abstract:
An electric power steering apparatus, comprising:a brushless motor for adding assist torque to a steering system; a steering torque detection means for detecting steering torque acting on the steering system and outputting a steering torque signal; a motor rotation detection means for detecting a rotation of the brushless motor and outputting a motor rotation signal; a motor current detection means for detecting a motor current, which flows in the brushless motor, and outputting a motor current signal; a target current setting means for setting a target current based on at least the steering torque signal and outputting a target current signal; a drive control means for outputting a motor control signal after receiving and processing at least the target current signal, the motor current signal and the motor rotation signal; and a motor drive means for driving the brushless motor based on the motor control signal, wherein said target current setting means and said drive control means are placed apart in order to manage temperature of said target current setting means and electrically connected to each other with a communication line.