K&R GT600-4T132G, User Manual

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6. Description of Parameters
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Incorrect PI setting may cause large speed overshoots and a fast falling speed drop
may cause an overvoltage on the DC bus.
6.5.5 Speed Loop
Function Code Parameter Name Setting Range Default
F2-00 Speed loop proportional gain 1 0 to 100 30
F2-01 Speed loop integral time 1 0.01 to 10.00s 0.50s
F2-02 Switchover frequency 1 0.00 to F2-05 5.00 Hz
F2-03
Speed loop proportional gain 2 0 to 100 20
F2-04 Speed loop integral time 2 0.01 to 10.00s 1.00s
F2-05 Switchover frequency 2 F2-02 to max. frequency 10.00 Hz
F2-00 to F2-05 are speed loop PI parameters.
●
If running frequency ≤ F2-02 (Switchover frequency 1), PI parameters are F2-00 and F2-01.
● If running frequency ≥ F2-05 (Switchover frequency 2), PI parameters are F2-03 and F2-04.
●
If running frequency is between F2-02 and F2-05, PI parameters are obtained from linear
switchover between two groups of PI parameters, as shown in Figure 9-2.
Figure 6-43 Speed loop PI parameters
PI parameters
F2-00
F2-01
F2-03
F2-04
F2-02 F2-05
Frequency reference
To improve the system response, increase the proportional gain or reduce the integral time.
Remember to increase proportional gain first to ensure that the system does not oscillate, and
then reduce integral time to ensure that the system has quick response and small overshoot.
6.5.6 SVC/FVC Slip Compensation Gain
Function Code Parameter Name Setting Range Default
F2-06 SVC/FVC slip compensation gain 50% to 200% 100%
This function improves control performance in SVC/FVC (F0-01 = 0/1).
For FVC (F0-01 = 1), it can adjust output current of the AC drive. Decrease this parameter
gradually when a large rating AC drive is controlling a lightly loaded motor. Adjustment of this
parameter is not required normally.
6
Note