Torque ripple suppression control apparatus and torque ripple suppression control method for rotating electrical machine

摘要

A periodic disturbance observer determines real part I^_An and imaginary part I^_Bn of an estimated current including a periodic disturbance, from value of identification identifying a system transfer function of an nth order torque ripple frequency component from a command torque to a detected torque value, with a one-dimensional complex vector having a real part P^_An and an imaginary part P^_Bn, a cosine coefficient T_An, a sine coefficient T_Bn, and the real part P^_An and imaginary part P^_Bn of the system transfer function; subtracts command compensating current I_An* and I_Bn* obtained through pulsation extracting filter G_F, respectively, from the real part I^_An and imaginary part I^_Bn of the estimated current, and thereby determines estimated periodic disturbance current real part dI^_An and imaginary part dI^_Bn to cancel the periodic disturbance current.