Parameter Description VD500 Series Inverter User Manual
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F3 Motor 1 Vector Control Parameter
F3-00
Speed Loop
Proportional Gain 1
01~100
30
○
F3-01
Speed Loop Integral
Time 1
0.01s~10.00s
0.50s
○
F3-02
Switch Frequency 1
0.00~F3-05
5.00Hz
○
F3-03
Speed Loop
Proportional Gain 2
1~100
20
○
F3-04
Speed Loop Integral
Time 2
0.01s~10.00s
1.00s
○
F3-05
Switching Frequency 2
F3-02~max frequency
10.00H
z
○
Under different frequency inverter running, you can select a different speed loop PI parameters.
When running frequency is less than the switching frequency 1 (F3-02), speed loop PI adjust the
parameter to F3-00 and F3-01. When running frequency is greater than the switching frequency 2,
speed loop PI adjust the parameter to F3-03 and F3-04. The speed loop PI parameter between
switching frequency 1 and switching frequency 2, for linear switching of two group PI parameters, as
shown in figure 6-5.
PI parameter
F3-00
F3-01
F3-03
F3-04
F3-02
F3-05
Frequency reference
Fig 6-5 Parameter diagram
By setting the proportional coefficient and integral time of speed regulator, can adjust the speed of
dynamic response characteristics of vector control.
Increase the proportional gain, reduce the integration time, the dynamic response of the speed loop.
But the proportional gain is too large or integration is too less could make the system produce
oscillation. Suggestion adjustment method is:
If factor parameters can’t meet the requirements, then fine-tuning based on the factory value
parameters, to increase the proportional gain, ensure system no oscillation; and then reduce the
integration time, make the system with faster response characteristics, and smaller overshoot.
Note: if the PI parameters set is improper, may lead to excessive speed overshoot, even occur
overvoltage fault in overshoot fall back.
F3-06
Vector Control Slip Gain
20%~200%
100%
○
To speed sensorless vector control, this parameter is used to adjust motor steady speed precision:
low speed when the motor load is increasing this parameter, vice versa.
To speed sensor vector control, this parameter can adjust inverter output current size in the same
loads.
