- 69 -
Figure 6-4 PI Parameter diagram
By setting the speed factor and the integration time of the speed regulator, you can adjust
the velocity dynamic response characteristics of the vector control.
Increase the proportional gain, reduce the integration time, can speed up the dynamic
response of the speed loop. But the proportional gain is too large or the integration time is
too small may cause the system to oscillate. Suggested adjustment method is:
If the factory parameters cannot meet the requirements, the parameters in the factory value
on the basis of fine-tuning, first increase the proportional gain to ensure that the system
does not oscillate; and then reduce the integration time, the system has a faster response
characteristics, overshoot and smaller.
Note: If the PI parameter is set incorrectly, it may cause the speed overshoot to be too
large. Even in the overshoot when the over voltage failure
P2-06
Vector control slip gain
Factory
default
100%
Set range
50%
～
200%
For speed sensor less vector control, this parameter is used to adjust the speed accuracy
of the motor: when the motor is loaded with low speed, the parameter is increased.
For speed sensor vector control, this parameter can adjust the size of the output current of
the inverter under the same load.
P2-07
SVC speed feedback filter
time constant
Factory
default
0.000s
Set range
0.000s
～
0.100s
SVC over-feedback filter time only when P0-01=0 into effect, increase P2-07 can improve
the motor stability, but the dynamic effect becomes weak, otherwise the corresponding
dynamic enhancement, but too small will cause the motor shock, so no adjustment.
Speed loop filter time constant is small, the inverter output torque may fluctuate
significantly, but the speed of response fast.
P2-09
Torque upper limit source in speed
control mode
Factory default
0
Set range
0
：
P2-10 1
：
AI1 2
：
AI2 3
：
AI3
4
：
High speed pulse input setting
（
S5
）
