5.Description of Function Codes
EM12 User's Manual
96
The speed dynamic response characteristics in vector control can be adjusted by setting the proportional gain and
integral time of the speed regulator.
To achieve a faster system response, increase the proportional gain and reduce the integral time. Be aware that this
may lead to system oscillation. The recommended adjustment method is as follows:
If the factory setting cannot meet the requirements, make proper adjustment. Increase the proportional gain first to
ensure that the system does not oscillate, and then reduce the integral time to ensure that the system has quick
response and small overshoot.
Note:
Improper PI parameter setting may cause too large speed overshoot, and overvoltage fault may even occur
when the overshoot drops.
d1-07
Motor running slip gain
Default
100%
Setting Range
50%~200%
d1-09
Vector control over excitation gain
Default
64
Setting Range
0~200
d1-10
Motor running torque upper limit source in speed control mod
Default
0
Setting
Range
0
d1-16
1
AI1
2
AI2
3
AI3
4
Pulse setting (HDI)
5
Communication setting
d1-11
Electric torque limit
Default
150.0%
Setting Range
0.0%~200.0%
These are current loop PI parameters for vector control. These parameters are automatically obtained through
"Asynchronous motor complete auto-tuning" or "Synchronous motor no- load auto-tuning", and need not be
modified.
The dimension of the current loop integral regulator is integral gain rather than integral time. Note that too large
current loop PI gain may lead to oscillation of the entire control loop.
Therefore, when current oscillation or torque fluctuation is great, manually decrease the proportional gain or
integral gain here.
d1-14
Excitation current loop proportional gain
Default
2000
Setting Range
0~30000
d1-15
Excitation current loop integral gain
Default
1300
Setting Range
0~30000
d1-16
Torque current loop proportional gain
Default
2000
Setting Range
0~30000
d1-17
Torque current loop integral gain
Default
1300
Setting Range
0~30000
In the speed control mode, the maximum output torque of the frequency inverter is restricted by d1-14. If the
torque upper limit is analog, pulse or communication setting, 100% of the setting corresponds to the value of
d1-16, and 100% of the value of d1-16 corresponds to the frequency inverter rated torque.
For details on the AI1, AI2 and AI3 setting, see the description of the AI curves. For details on the pulse setting,
see the description of b5-00 ~ b5-04.
Summary of Contents for EM12 Series
Page 5: ......
