Ez Open Loop Vector Control Method - YASKAWA GA800 Programming Manual

3.7 Fine Tuning during Test Runs (Adjust the Control Function)
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EZ Open Loop Vector Control Method

Issue
• High speed
• Low speed
• Unsatisfactory motor torque
and speed response
• Hunting or oscillation
• High speed
• Low speed
The drive cannot find ASR
C5-07 [ASR Gain Switchover
proportional gain or integral time
Frequency]
for low speed or high speed.
Hunting or oscillation C5-06 [ASR Delay Time]
Step-out E9-xx parameters
n8-51 [Accel / Decel Pull-In
Oscillation when the motor starts.
Current]
Motor stalls. L7-01 to L7-04 [Torque Limit]
*1 The best values for a no-load operation are different than the best values for actual loading operation.
606
Table 3.22 Parameters for Fine Tuning the Drive (A1-02 = 8[EZOLV])
Parameter Number
• If torque or speed response are
C5-01 [ASR Proportional Gain
slow, increase the setting value
1]
in increments of 5.00.
• If hunting or oscillation occur,
C5-03 [ASR Proportional Gain
decrease the setting value.
2]
• If torque or speed response are
C5-02 [ASR Integral Time 1] slow, decrease the setting value.
• If hunting or oscillation occur,
C5-04 [ASR Integral Time 2] increase the setting value.
Change the ASR proportional gain
and ASR integral time to conform
to the output frequency.
If the rigidity of the machine is
unsatisfactory and vibration is
possible, increase the setting value
in increments of 0.010.
Refer to the motor nameplate or
test report and set E9-xx correctly.
Increase the setting value.
Increase the setting value.
Possible Solutions
10.00
0.500 s
0.0%
0.004 s
80%
200%
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default Recommended Setting
*1
10.00 to 50.00
0.300 s to 1.000 s
0.0% to maximum rotation speed
0.004 s to 0.020 s
-
Increase in increments of 5%.
Increase in increments of 10%.
*1
*1
-