4-290
Use parameter 20-17 to adjust the torque compensation gain for the low speed range. By tuning 20-17an
offset is added to the torque-speed curve. Increase 20-17 when the no-load speed is lower than the frequency
reference. Decrease 20-17 when the no-load speed is higher than the frequency reference. The effect on the
torque-speed curve from 20-17 is shown as the following figure:
Decrease 20-17 Increase 20-17
Torque
Speed
Figure 4.4.115 Effect on the torque-speed curve from 20-17
Use parameter 20-18 to adjust the torque compensation gain for middle to high speed range. For most general
purpose applications it is not necessary to adjust the 20-18. By tuning 20-18an offset is added to the
torque-speed curve. Increase 20-18 when the no-load speed is lower than the frequency reference. Decrease
20-18 when the no-load speed is higher than the frequency reference. The effect on the torque-speed curve
from 20-18 is shown as the following figure 4.4.116.
Torque
Speed
Decrease
20-18
Decrease
20-18
Increase
20-18
Increase
20-18
Figure 4.4.116 Effect on the torque-speed curve from 20-17
①. ASR main delay time (20-08).
a) Does not required to be adjusted for general purpose applications
b) When the set value of 20-08 is set high, the speed response will and therefore system response will
decrease improving system stability.
②. ASR integral limit (20-04)
a) Setting a small value may prevent system response when the load suddenly changes.
To Next Page
Loading...
