YASKAWA GA700 - Fine Tuning During Test Runs (Adjust the Control Function); V;F Control and Closed Loop V;F Control

3.10 Fine Tuning during Test Runs (Adjust the Control Function)
204 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
3.10 Fine Tuning during Test Runs (Adjust the Control
Function)
This section gives information about the adjustment procedures to stop hunting or oscillation errors caused by
control function during a test run. Adjust the applicable parameters as specified by your control method and drive
status.
• V/f Control and Closed Loop V/f Control on page 204
• Open Loop Vector Control Method on page 205
• Closed Loop Vector Control Method on page 208
• Advanced Open Loop Vector Control Method on page 209
• Fine-Tuning Open Loop Vector Control for PM Motors on page 211
• Advanced Open Loop Vector Control Method for PM on page 212
• Closed Loop Vector Control Method for PM on page 213
• EZ Open Loop Vector Control Method on page 214
Note:
This section only lists frequently adjusted parameters. If you must adjust parameters that have a higher degree of precision, contact
Yaskawa.
◆ V/f Control and Closed Loop V/f Control
Table 3.17 Parameters for Fine Tuning the Drive (V/f Control and Closed Loop V/f Control Methods)
Issue Parameter Number Solution Default Setting Recommended
Setting
Hunting or oscillation at
mid-range speeds (10 Hz
to 40 Hz)
n1-02 [Hunting
Prevention Gain Setting]
• If torque is not
sufficient with heavy
loads, decrease the
setting value.
• If hunting or oscillation
occur with light loads,
increase the setting
value.
• If hunting occurs with a
low-inductance motor,
for example a motor
with a larger frame size
or a high-frequency
motor, lower the setting
value.
1.00 0.10 - 2.00
• The volume of the
motor excitation sound
is too high.
• Hunting or oscillation
at low speeds (10 Hz or
lower), or at mid-range
speeds (10 Hz to 40
Hz)
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 or mid-
range speeds, decrease
the carrier frequency.
1 (2 kHz)
*1
1 to upper limit value
• Torque or speed
response are slow.
• Hunting or oscillation
C4-02 [Torque
Compensation Delay
Time]
• If torque or speed
response are slow,
decrease the setting
value.
• If hunting or oscillation
occur, increase the
setting value.
200 ms
*2
100 - 1000 ms
• Torque at low speeds
(10 Hz or lower) is not
sufficient.
• Hunting or oscillation
C4-01 [Torque
Compensation Gain]
• If torque at low speeds
(10 Hz or lower) is not
sufficient, increase the
setting value.
• If hunting or oscillation
occur with light loads,
decrease the setting
value.
1.00 0.50 - 1.50