Patent ID: 8983730
Filing Date: 2015-03-17
Classification: B62D,H02P

Abstract:
1. An electric power steering apparatus for use with a vehicle on a road, the electric power steering apparatus comprising: an electric motor having two systems independent from each other, each system having motor coils wound on each of a plurality of stator teeth; a steering force assist device configured to provide an assist force based on magnetomotive force generated by the motor coils of the two systems; and a controller configured to: (i) control an assist operation of the steering force assist device through controlling electric power supply to the motor coils, and (ii) determine that a predetermined condition is satisfied when the controller detects that the vehicle is traveling on an uneven road, the controller including: wherein, when the predetermined condition is satisfied, the control signal output unit outputs: the control signals to the drive circuits such that at least two phases of three phases of the motor coils of one of the two systems that is not executing the assist operation are short-circuited, and the control signals for continued execution of an assist control to the motor coils of one of the two systems executing the assist operation.