Advanced Open Loop Vector Control Method - YASKAWA GA800 Series Technical Reference

Issue
Hunting or oscillation C5-06 [ASR Delay Time]
• The volume of the motor
excitation sound is too high.
C6-02 [Carrier Frequency
Selection]
• Hunting or oscillation at low
speeds (3 Hz or lower)
*1 Refer to the section on C5-xx parameters for more information about speed control (ASR).
*2 The default setting changes when the settings for C6-01 [Normal / Heavy Duty Selection] and o2-04 [Drive Model (KVA) Selection]
change.
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Advanced Open Loop Vector Control Method

Issue
• oS [Overspeed] occurs.
T1-01 [Auto-Tuning Mode
Selection]
• Hunting or oscillation.
The volume of the motor C6-02 [Carrier Frequency
excitation sound is too high. Selection]
Speed precision is unsatisfactory E2-02 [Motor Rated Slip]
• High speed
• Low speed
• Unsatisfactory motor torque
and speed response
• Hunting or oscillation
• High speed
• Low speed
• C5-07 [ASR Gain Switchover
• High speed
The drive cannot find speed
response for low speed or high
speed.
• Low speed
Hunting or oscillation C5-06 [ASR Delay Time]
*1 The default setting changes when the settings for C6-01 [Normal / Heavy Duty Selection] and o2-04 [Drive Model (KVA) Selection]
change.
*2 The default setting changes when the setting for o2-04 [Drive Model Selection] changes.
YASKAWA SIEPC71061737B GA800 Drive Technical Reference
4.10 Fine Tuning during Test Runs (Adjust the Control Function)
Parameter Number Possible Solutions
• If torque or speed response are
slow, decrease the setting value
in increments of 0.010.
*1
• If the rigidity of the machine is
unsatisfactory and vibration is
possible, increase the setting
value.
• 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.
Table 4.20 Parameters for Fine Tuning the Drive (AOLV)
Parameter Number Possible Solutions
• Make sure that the output of the
drive and the motor are
connected correctly.
• Do Rotational Auto-Tuning for
a single motor.
If the volume of the motor
excitation sound is too high,
increase the carrier frequency.
• Decouple the motor and
machine and do Rotational
Auto-Tuning.
• If the motor speed is slow,
increase the value of E2-02 in
small increments
(approximately 0.1% of the
default setting value).
• If the motor speed is fast,
decrease the value of E2-02 in
small increments
(approximately 0.1% of the
default setting value).
• 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.
*3
2 (P)]
• 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 Proportional Gain
*3
2 (P)] increase the setting value.
*4
Frequency]
C5-01 [ASR Proportional Gain
Change the ASR proportional gain
1]
and ASR integral time to conform
C5-02 [ASR Integral Time 1]
to the output frequency.
C5-03 [ASR Proportional Gain
*3
2 (P)]
C5-04 [ASR Integral Time 2]
• If torque or speed response are
slow, decrease the setting value
in increments of 0.010.
*4
• If the rigidity of the machine is
unsatisfactory and vibration is
possible, increase the setting
value.
Default
0.004 s 0.004 s to 0.020 s
*2
1 (2.0 kHz) 2.0 kHz to upper limit value
Default
- 0
*1
1 (2 kHz) 1 to upper limit value
Set to a value that is ±5% of the
*2
current value.
• C5-01 = 10.00
10.00 - 50.00
• C5-03 = 20.00
0.500 s 0.300 s to 1.000 s
• C5-07 = 0.0 Hz
• C5-01 = 10.00
C5-07: 0.0 to maximum output
• C5-02 = 0.500 s
frequency
• C5-03 = 20.00
• C5-04 = 0.500 s
0.004 s 0.004 s to 0.020 s
Recommended Setting
Recommended Setting
4
205