
24-26 Power Electronics and Motor Drives
In speed (or position)-controlled drives, the impact of the incorrect setting of the rotor time constant
(slip gain) in the controller is suppressed to some extent by the ltering eect of the drive’s inertia. is
is illustrated in Figure 24.22, where an acceleration transient (from 200 to 1500 rpm) is shown for the
2.3 kW three-phase machine already considered in conjunction with Figure 24.17. e same transient
is recorded for a number of settings of the slip gain (SG) of Figure 24.15. Two dierent loading con-
ditions are considered: no-load acceleration and acceleration with a variable load that r