Powtran PI160-0R7G1(Z) - Page 78

Chapter 5 Function parameter
74
Chapter 5
F5.04
Speed loop integral T2
0.01s～10.00s
1.00s
☆
F5.05
Switching frequency 2
F5.02～F0.19(Max frequency )
10.00Hz
☆
PI parameter
F5.01
F5.04
F5.03
F5.00
F5.02
F5.05
Frequency of instruction
Figure 5-13:PI parameter diagram
Inverter working in different frequency can choose different speed ring PI parameters.
Operating frequency is less than the switching frequency 1 (F5.02), speed ring PI control
parameters for F5.00 and F5.01. Operating frequency is bigger than the switching frequency 2
(F5.05), speed in PI control parameters for F5.03 and F5.04. The speed ring PI parameters of
switching frequency 1 and switching frequency 2 are for the two groups of PI parameter linear
switching, as shown in figure:
By setting speed regulator proportion coefficient and the integral time, can adjust the speed
of the vector control dynamic response characteristics.
Gain take large, quick response, but too large will produce oscillation; Gain take hours,
response lag.
Integral time is too large, slow response, external interference control variation will
worse;If integral time short, reaction quickly,too small happen oscillation.
Set this value to considering the control stability and response speed, if the factory
parameters can't meet the requirements, adjust parameter based on the factory, first increase
proportion to ensure the system is not oscillation; Then reduced integration time, make the
system has faster response, small overshoot.
Note: if the PI parameters Settings unsuitable, may cause excessive speed overshoot. Even
in overshoot back occurs when overvoltage fault.
F5.06
Speed loop integral
valid
0
0
☆
Invalid
1
F5.07
Torque limit source under
speed control mode
Function code F5.08 setting
0
0
☆
Analog AI1 setting
1
Reserve
2
Panel potentiometer setting
3
High-speed pulse setting
4
Communication setting
5
F5.08
Limit digital setting
0.0%～200.0%
150.0%
☆
In speed control mode, the maximum value of inverter output torque is controlled by the
torque upper limit source.
F5.07 is used to select the setting source of torque limit, when it is set by analog, high-
speed pulse or communication, the set 100% corresponds to F5.08, the 100% of F5.08 is the
inverter's rated torque.
F5.09
Vector control differential gain
50%～200%
150%
☆
For the sensorless vector control, the parameter can be used to adjust the motor speed and
stability: if the speed of motor with load is low, increases the parameter and vice versa
decreases.
F5.10
Speed loop filter time
0.000s～0.100s
0.000s
☆
Under vector control mode, properly increases the filter time when speed fluctuate wildly;