KE600 Inverter Parameter Description
155
Figure 6-30 PI parameter diagram
The speed dynamic response characteristics of the vector control can be adjusted by setting the
proportional coefficient and integration time of the speed regulator.
Increasing the proportional gain or reducing the integration time can accelerate the dynamic response of
the speed loop. However, if the proportional gain is too large or the integration time is too short, it will cause
the oscillation of the system.
Recommended adjustment method:
If factory default cannot meet the requirements, the relevant parameter values can be subject to fine
tuning.
Increase the proportional gain while ensuring no oscillation to the system, and then reduce the integration
time to ensure that the system has quick response characteristics and small overshoot.
Caution: Improper PI parameter setting may cause too large speed overshoot. Voltage fault may
occur when the overshoot drops.
A2-44
Vector control slip
compensation coefficient
Factory default
100%
Setting range
50% ~ 200%
For sensorless vector control, this parameter is used to adjust the speed stabilizing precision of the motor.
When the speed is too low due to heavy load of motor, this parameter needs to be enlarged, vice versa.
A2-45
Speed loop filter time
Factory default
0.000s
Setting range
0.000s ~ 0.100s
Under vector control mode, the output of speed loop regulator is torque current command. This parameter
is used to filter the torque command. This parameter needs no adjustment generally and this filter time can
be increased in case of huge speed fluctuation. In case of oscillation of motor, this parameter should be
reduced properly.
The speed loop filter time is low, and the inverter output torque may fluctuate greatly, but the response is
quick.
A2-41
A2-42
Frequency
A2-43
A2-38
A2-39
A2-40
PI parameters
