User Manual of A90 Series Inverter
174
motor are used under normal circumstances.
On the basis of the VF separation voltage source setting, the set value of F05.20
changes at intervals of one minute in the power supply setting.
7.7
Vector Control Parameter Group of F06 Group
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
F06.00
Speed proportional
gain ASR_P1
0.00-100.00
12.00
●
F06.01
Speed integral time
constant ASR_T1
0.000 - 30.000, 0.000: no integral
s
0.200
●
F06.02
Speed proportional
gain ASR_P2
0.00-100.00
8.00
●
F06.03
Speed integral time
constant ASR_T2
0.000 - 30.000, 0.000: no integral
s
0.300
●
F06.04 Switching frequency 1 0.00 to switching frequency 2
Hz
5.00
●
F06.05 Switching frequency 2
Switching frequency 1 to
maximum frequency F00.16
Hz 10.00
●
In the vector control mode, the dynamic speed response of the inverter is adjusted by
changing the speed proportional gain (ASR_P) and speed integral time (ASR_T) of the
speed PI regulator. The increase in ASR_P or decrease in ASR_T may accelerate the
dynamic response of the speed loop. If ASR_P is too large or ASR_T is too small, however,
the system may be over-tuned to cause oscillation.
Users should adjust the above speed PI parameters according to the actual load
characteristics. Generally, as long as the system does not oscillate, ASR_P should be
increased as much as possible, and then ASR_T should be adjusted, so that the system
makes response fast, without excessive over-tuning.
To enable fast dynamic responses of the system at low and high speeds, PI regulation
should be performed separately at low and high speeds. During the actual operation, the
speed regulator will automatically calculate the current PI parameters based on the current
frequency. The speed PI parameters are P1 and T1 at the switching frequency 1, and P2 and
T2 at the switching frequency 2. If the frequency is greater than the F06.04 switching
frequency 1 and less than F06.05 switching frequency 2, the switching frequency 1 and
switching frequency 2 will be subject to linear transition. See Fig. 7-21.
