Electric power steering system

摘要: A feedforward control section computes, on the basis of a target current absolute value, voltage limit value motor drive circuit, and rotational speed ωr motor, phase angle vector which represents output circuit by d-q coordinate system, being in relation to d-axis system. feedback computes based deviation between actual value. PWM signal generation outputs signals such that three-phase whose electrical is advanced angle. Thus, case where large reverse input applied steering mechanism, caused generate torque thereby prevent wheel from rotated.