Fig. 8 shows the influence of the drive output power on
the dominant pair of eigenvalues when the current control
loop bandwidths for the converter and motor drive are set to
1.0 kHz and 800 Hz, respectively. The output power in this
case is varied by changing the load torque TL from 1Nm to
10Nm. It is seen that the system stability deteriorates with
the increase in the drive output power