Fine Tuning During Test Runs (Adjust The Control Function); V/F Control - YASKAWA CIPR-GA50C series Technical Manual

4.11 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 the
control function during a test run. Adjust the applicable parameters as specified by your control method and drive
status.
•
V/f Control on page 143
• Fine-Tuning Open Loop Vector Control for PM Motors on page 145
•
Advanced Open Loop Vector Control Method for PM on page 146
•
EZ Open Loop Vector Control Method on page 147
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

Issue
Hunting or oscillation at mid- n1-02 [Hunting Prevention Gain
range speeds (10 Hz to 40 Hz) Setting]
• The volume of the motor
excitation sound is too high.
C6-02 [Carrier Frequency
• Hunting or oscillation at low
Selection]
speeds (10 Hz or lower), or at
mid-range speeds (10 Hz to 40
Hz)
• Unsatisfactory motor torque
C4-02 [Torque Compensation
and speed response
Delay Time]
• Hunting or oscillation
• Torque at low speeds (10 Hz
C4-01 [Torque Compensation
or lower) is not sufficient.
Gain]
• Hunting or oscillation
• If you use the drive with an
IE3 high efficiency motor, the
current that is more than the C4-01 [Torque Compensation
motor rated current will flow Gain]
and trip at overload. Hunting
or oscillation.
• Torque at low speeds (10 Hz
• E1-08 [Mid Point A Voltage]
or lower) is not sufficient.
• E1-10 [Minimum Output
• Large initial vibration at start
up.
Speed precision is unsatisfactory. C3-01 [Slip Compensation Gain]
*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 settings for A1-02 [Control Method Selection] and o2-04 change.
*3 The default setting changes when the settings for A1-02 and E1-03 [V/f Pattern Selection] change.
*4 Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
YASKAWA SIEPC71061753A GA500 Technical Manual

4.11 Fine Tuning during Test Runs (Adjust the Control Function)

Table 4.17 Parameters for Fine Tuning the Drive (A1-02 = 0 [V/f])
Parameter Number Possible Solutions
• 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.
Set n1-01 = 1 [Hunting
Prevention Selection =
Enabled].
• 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.
• If torque or speed response are
slow, decrease the setting
value.
• If hunting or oscillation occur,
increase the setting value.
• 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.
Decrease the setting value in
these conditions:
• Drive trips at overload.
• Hunting or oscillation.
• If torque at low speeds (10 Hz
or lower) is not sufficient,
increase the setting value.
• If there is large initial
Voltage]
vibration at start up, decrease
the setting value
Set E2-01 [Motor Rated Current],
E2-02 [Motor Rated Slip], and
E2-03 [Motor No-Load Current],
then adjust C3-01.
Default Recommended Setting
1.00 0.10 - 2.00
*1
1 (2 kHz) 1 to upper limit value
*2
200 ms 100 ms to 1000 ms
1.00 0.50 - 1.50
1.00 0.00 - 1.00
• E1-08: 16.0 V *3
Default setting +/- 5 V
• E1-10: 12.0 V *3
0.0 (no slip compensation) 0.5 - 1.5
4
*4
143