Advanced Open Loop Vector Control Method - YASKAWA GA700 Technical Manual

Issue
C5-06 [ASR Delay Time]
Hunting or oscillation
*1
• 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 Default value changes when o2-04 [Drive Model (KVA) Selection] and C6-01 [Normal / Heavy Duty Selection] values change.
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Advanced Open Loop Vector Control Method

Table 3.20 Parameters for Fine Tuning the Drive (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
Selection]
high.
Speed precision is
E2-02 [Motor Rated Slip]
unsatisfactory
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
3.10 Fine Tuning during Test Runs (Adjust the Control Function)
Parameter Number
• If torque or speed
response are slow,
decrease the setting
value in increments of
0.010.
• 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.
Parameter Number
• Make sure that the
output of the drive and
the motor are
connected correctly.
• Decouple the motor
and machine and do
Rotational Auto-
Tuning.
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).
Solution Default Setting
0.004 s
1 (2.0 kHz)
Solution Default Setting
1 (2 kHz)
*1
*2
Recommended
Setting
0.004 to 0.020 s
2.0 kHz to upper limit
*2
value
Recommended Setting
- 0
1 to upper limit value
Set to a value that is ±5%
of the current value.
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