YASKAWA GA500 series, Programming, Page: 484 / 526

3.7 Fine Tuning during Test Runs (Adjust the Control Function)
484 YASKAWA TOEPYAIGA5002A GA500 Programming
Issue Parameter Number Possible Solutions Default Recommended Setting
• Oscillation when the motor
starts.
•
Motor stalls.
n8-51 [Pull-in Current @ Accel/
Decel] Increase the setting value in
increments of 5%.
50% -
• b2-02 [DC Injection Braking
Current]
• b2-03 [DC Inject Braking Time
at Start]
Use DC Injection Braking at start.
Note:
This can cause the motor to
rotate in reverse for
approximately 1/8 of a turn at
start.
• b2-02: 50%
• b2-03: 0.00 s
• b2-02: Adjust as necessary.
• b2-03: 0.5 s
n8-55 [Motor to Load Inertia
Ratio]
Increase the setting value.
Note:
When you operate a single
motor or with a minimum
quantity of inertia, if you set
this value too high, it can cause
motor oscillation.
0 Near the load inertia ratio.
There is too much current during
deceleration. n8-79 [Pull-in Current at
Deceleration]
Set n8-79 < n8-51 .
50%
Note:
When n8-79 = 0 , the drive will
apply the n8-51 setting to the
pull-in current during
deceleration.
Decrease in increments of 5%.
Stalling or oscillation occurs when
you apply the load during constant
speed
n8-47 [Pull-in Current Comp Filter
Time] Decrease the setting value in
increments of 0.2 s.
5.0 s -
n8-48 [Pull-in/Light Load Id
Current] Increase the setting value in
increments of 5%.
30% -
n8-55 [Motor to Load Inertia
Ratio]
Increase the setting value.
Note:
When you operate a single
motor or with a minimum
quantity of inertia, if you set
this value too high, it can cause
motor oscillation.
0 Near the load inertia ratio.
Hunting or oscillation
n8-45 [Speed Feedback Detection
Gain] Increase the setting value in
increments of 0.05.
0.80 -
The drive detects STPo [Motor
Step-Out Detected] fault when the
load is not too high.
• E5-09 [PM Back-EMF Vpeak
(mV/(rad/s))]
•
E5-24 [PM Back-EMF L-L
Vrms (mV/rpm)]
•
Adjust the setting value.
•
Examine the motor code on the
motor nameplate or the data
sheet, then set correct values for
E5-09 or E5-24 .
*1
• Yaskawa motor
Set the motor code from the
motor nameplate.
• Motor from another
manufacturer
Set the values from the test
report.
The drive detected stalling or STPo
[Motor Step-Out Detected] at high
speed and maximum output
voltage.
n8-62 [Output Voltage Limit
Level] Set to a value lower than the actual
input voltage.
•
200.0 V
• 400.0 V
-
*1 The default setting changes when the settings for E5-01 [Motor Code Selection] and o2-04 [Drive Model (KVA) Selection] change.
◆
Advanced Open Loop Vector Control Method for PM Motors
Table 3.17 Parameters for Fine Tuning the Drive ( A1-02 = 6 [AOLV/PM] )
Issue Parameter Number Possible Solutions Default Recommended Setting
• Unsatisfactory motor torque
and speed response
•
Hunting or oscillation
•
High speed
C5-01 [ASR Proportional Gain
1]
•
Low speed
C5-03 [ASR Proportional Gain
2]
•
If torque or speed response are
slow, increase the setting value
in increments of 5.00.
•
If hunting or oscillation occur,
decrease the setting value.
10.00 5.00 to 30.00
*1
• High speed
C5-02 [ASR Integral Time 1]
•
Low speed
C5-04 [ASR Integral Time 2]
• If torque or speed response are
slow, decrease the setting value.
•
If hunting or oscillation occur,
increase the setting value.
0.500 s 0.300 s to 1.000 s
*1
The drive cannot find ASR
proportional gain or integral time
for low speed or high speed.
C5-07 [ASR Gain Switchover
Frequency]
Change the ASR proportional gain
and ASR integral time to conform
to the output frequency.
0.0% 0.0% to maximum rotation speed