Patent ID: 6608457
Filing Date: 2003-08-19
Classification: B62D

Abstract:
A system for controlling electric power steering comprising:an electric motor for generating an assist force; steering-torque detection means for detecting steering torque; basic assist command-value determination means for determining a basic assist command value on the basis of the steering torque signal; differentiation command-value determination means for determining a differentiation command value on the basis of the steering torque signal; vehicle-speed detection means for detecting vehicle speed; field-current determination means for determining field-current for said electric motor in response to a vehicle-speed signal; and motor-current control means for controlling said electric motor, wherein said motor-current control means controls the output of said electric motor in response to a field-current control signal from said field-current determination means and a torque-current control signal for said electric motor determined on the basis of the basic assist command value and the differentiation command value.