60
Chapter6
P2
vector control parameter
P2-04
Speed loop integration
time 2
0.01s
~
10.00s
Default
:
1.00s
P2-05
Switching frequency 2
P2-02
~
Maximum frequency
Default
:
10.00Hz
The inverter runs at different frequencies and can select different speed loop PI
parameters. When the running frequency is less than the switching frequency 1 (P2-02),
the speed loop PI adjustment parameters are P2-00 and P2-01. When the running
frequency is greater than the switching frequency 2, the speed loop PI adjustment
parameters are P2-03 and P3-04. Switching the speed loop PI parameter between
frequency 1 and switching frequency 2, linearly switching between two sets of PI
parameters, as shown in Figure 6-2.
:
PI parameter
P2-00
P2-01
P2-03
P2-04
P2-02
P2-05
Frequency command
6-2 PI Parameter diagram
The speed dynamic response characteristic of the vector control can be adjusted by
setting the proportionality factor and the integration time of the speed regulator.
Increasing the proportional gain and reducing the integration time can speed up the
dynamic response of the speed loop. However, if the proportional gain is too large or the
integration time is too small, the system can oscillate. The recommended adjustment method
is:
If the factory parameters do not meet the requirements, fine-tune the Default parameter,
first increase the proportional gain to ensure that the system does not oscillate; then reduce
the integration time, so that the system has faster response characteristics, overshoot and
smaller
。
Note: If the PI parameters are not set properly, the speed overshoot may be too large.
An overvoltage fault occurs even when the overshoot falls back.
P2-06
Vector control slip
gain
50%
~
200%
Default
:
100%
For speed sensorless vector control, this parameter is increased when the speed is
lower when the motor is loaded, and vice versa.
For speed sensor vector control, this parameter can adjust the output current of the
inverter under the same load.
For speed sensor vector control, this parameter can adjust the output current of the
inverter under the same load.
。
P2-07
Speed loop filter time
constant
0.000s
~
0.100s
Default
:
0.000s