4-227
18) Use parameter 20-17 to adjust the torque compensation gain for the low speed range. By tuning 20-17 an
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 speed-torque curve from 20-17 is shown in the following figure
Decrease 20-17 Increase 20-17
Torque
Speed
Figure 4.3.115 20-17 Effect on the torque-speed curve
Use parameter 20-18 to adjust the torque compensation gain for medium to high speed range. For most general
purpose applications it is not necessary to adjust the 20-18. The effect on the speed-torque curve by parameter
20-18 is shown in figure 4.3.116.
Torque
Speed
Decrease
20-18
Increase
20-18
Decrease
20-18
Increase
20-18
Figure 4.3.116 Effect on the torque-speed curve by parameter 20-18
20-04: ASR integral limit
Setting the ASR integral limit to a low value may prevent a large system response when the load suddenly
changes.
20-08: ASR main delay time
(1) Does not require to be adjusted for general purpose applications.
(2) When the value of 20-08 is set high, speed response and system response will decrease and therefore
improve system stability.
20-34
Compensation Gain of Derating
Range
【
0 ~25600
】
20-35
Compensation Time of Derating
Range
【
0~30000
】
ms