YASKAWA GA700 - Advanced Open Loop Vector Control Method

Startup Procedure and Test Run
3
3.10 Fine Tuning during Test Runs (Adjust the Control Function)
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 209
Issue Parameter Number Solution Default Setting Recommended
Setting
Hunting or oscillation
C5-06 [ASR Delay Time]
*1
• 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.
0.004 s 0.004 to 0.020 s
• The volume of the
motor excitation sound
is too high.
• Hunting or oscillation
at low speeds (3 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 (2.0 kHz)
*2
2.0 kHz to upper limit
value
*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.
◆ Advanced Open Loop Vector Control Method
Table 3.20 Parameters for Fine Tuning the Drive (Advanced Open Loop Vector Control Method)
Issue Parameter Number Solution Default Setting Recommended Setting
• oS [Overspeed] occurs.
• Hunting or oscillation.
T1-01 [Auto-Tuning
Mode Selection]
• Make sure that the
output of the drive and
the motor are
connected correctly.
• Decouple the motor
and machine and do
Rotational Auto-
Tuning.
- 0
The volume of the motor
excitation sound is too
high.
C6-02 [Carrier Frequency
Selection]
If the volume of the motor
excitation sound is too
high, increase the carrier
frequency.
1 (2 kHz)
*1
1 to upper limit value
Speed precision is
unsatisfactory
E2-02 [Motor Rated Slip]
• 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).
*2
Set to a value that is ±5%
of the current value.