YASKAWA GA800 Series, Technical Reference

Page: 204 / 1016

4.10 Fine Tuning during Test Runs (Adjust the Control Function)
204 YASKAWA SIEPC71061737B GA800 Drive Technical Reference
Issue Parameter Number Possible Solutions Default Recommended Setting
• Unsatisfactory motor torque
and speed response
• Hunting or oscillation
C4-02 [Torque Compensation
Delay Time 1]
• If torque or speed response are
slow, decrease the setting value
in increments of 2 ms.
• If hunting or oscillation occur,
increase the setting value in
increments of 10 ms.
Note:
Make sure that this parameter
setting is:
C4-02 ≤ C4-06
[Motor 2 Torque Comp Delay
Time]
.
When you adjust C4-02 , you
must also increase the n2-02
[SpdFeedbackDetCtr (AFR)
TimeConst1]
value by the same
ratio.
20 ms
*1
20 ms to 100 ms
*1
•
Speed response is slow.
•
Speed is not stable.
C3-02 [Slip Compensation Delay
Time]
•
If speed response is slow,
decrease the setting value in
increments of 10 ms.
•
If speed is not stable, increase
the value in increments of 10
ms.
200 ms
*1
100 ms to 500 ms
Speed precision is unsatisfactory. C3-01 [Slip Compensation Gain]
• If speed is too slow, increase the
setting value in increments of
0.1.
• If speed is too fast, decrease the
setting value in increments of
0.1.
1.0
*2
0.5 - 1.5
•
The volume of the motor
excitation sound is too high.
• Hunting or oscillation at low
speeds (10 Hz or lower)
C6-02 [Carrier Frequency
Selection]
• If the volume of the motor
excitation sound is too high,
increase the carrier frequency.
• If hunting or oscillation occur at
low speeds, decrease the carrier
frequency.
1 (2 kHz)
*3
0 to upper limit value
• Torque at low speeds (10 Hz or
lower) is not sufficient. speed
response is slow.
• Speed response is slow.
• Large initial vibration at start
up.
• E1-08 [Mid Point A Voltage]
• E1-10 [Minimum Output
Voltage]
•
If torque or speed response are
slow, increase the setting value.
• If there is large initial vibration
at start up, decrease the setting
value
Note:
If the setting value is set too
high, a large torque reference
may be output even with light
loads.
• E1-08: 11.0 V
*2
• E1-10: 2.0 V
*2
Default s/- 2 V
*4
*1 The default setting changes when the settings for A1-02 [Control Method Selection] and o2-04 [Drive Model (KVA) Selection] change.
*2 The default setting changes when the settings for A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection] change.
*3 The default setting changes when the settings for C6-01 [Normal / Heavy Duty Selection] and o2-04 change.
*4 Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
◆
Closed Loop Vector Control Method
Table 4.19 Parameters for Fine Tuning the Drive (CLV)
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 (P)]
*1
• 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.
20.00 10.00 - 50.00
•
High speed
C5-02 [ASR Integral Time 1]
• Low speed
C5-04 [ASR Integral Time 2
(I)]
*1
•
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
The drive cannot find ASR
proportional gain or integral time
for low speed or high speed.
C5-07 [ASR Gain Switchover
Frequency]
*1
Change the ASR proportional gain
and ASR integral time to conform
to the output frequency.
0.0 Hz
0.0 Hz to maximum output
frequency