EM15 User’s Manual
5. Description of Function Codes
93
d1-17
Torque current loop integral gain
Default
1300
Setting Range
0~30000
d1-18
Speed loop integral property
Default
0
Setting
Range
0
Integral separation disabled
1
Integral separation enabled
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.
d1-21
Maximum output voltage coefficient
Default
105%
Setting Range
100%~110%
This parameter indicates boost capacity of maximum voltage of the AC drive. Increasing d1-21 will improve max.
loading capacity in motor field weakening area. Be aware that this may lead to an increase in motor current ripple
and an increase in motor heating.
Decreasing it will reduce motor current ripple and motor heating. Be aware that this will lower max. loading
capacity in motor field weakening area. Adjustment of this parameter is not required normally.
d1-22
Max. torque coefficient of field weakening area
Default
100%
Setting Range
50%~200%
This parameter takes effect only when the motor runs above the rated motor frequency.
When the motor need rapidly accelerate to twice of rated motor frequency but actual acceleration time is very long,
decrease the setting of d1-22 adequately.
When the motor runs above twice of rated motor frequency and speed dip is very large after a load is added,
increase the setting of d1-22 adequately. Adjustment of this parameter is not required normally.
d1-24
Torque setting source in torque control
Default
0
Setting
Range
0
Digital setting (d1-27)
1
AI1
2
AI2
3
AI3
4
Pulse setting (HDI)
5
Communication setting
6
MIN (AI1, AI2)
7
MAX (AI1, AI2)
d1-26
Torque digital setting in torque control
Default
150.0%
Setting Range
-200.0%~200.0%
The d1-24 is used to set the torque setting source. There are a total of eight torque setting sources.
The torque setting is a relative value. 100.0% corresponds to the frequency inverter's rated torque. The setting
range is -200.0% ~ 200.0%, indicating the frequency inverter's maximum torque is twice of the frequency
inverter's rated torque.
If the torque setting is positive, the frequency inverter rotates in forward direction. If the torque setting is negative,
the frequency inverter rotates in reverse direction.
