Fig.5 Variation of Damping Ratio with Motor Current and Speed Control
Bandwidths
Fig. 6 represents the influence of the boost converter
current control bandwidth on the dominant pair of
eigenvalues when the motor drive current control bandwidth
is set to 800Hz. The converter current control bandwidth is
varied from 150 Hz to 1.5 kHz. It can be observed that as the
control bandwidth increases, the system stability deteriorates
and becomes unstable when the control bandwidth is above
1.05 kHz.