Fine Tuning During Test Runs (Adjust The Control Function); V/F Control And Closed Loop V/F Control - YASKAWA GA800 Series Technical Reference

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

4.10 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 202
•
Open Loop Vector Control Method on page 203
•
Closed Loop Vector Control Method on page 204
•
Advanced Open Loop Vector Control Method on page 205
• Fine-Tuning Open Loop Vector Control for PM Motors on page 206
• Advanced Open Loop Vector Control Method for PM on page 207
• Closed Loop Vector Control Method for PM on page 207
• EZ Open Loop Vector Control Method on page 208
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

Issue
Hunting or oscillation at mid-range n1-02 [Hunting Prevention Gain
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 or
C4-01 [Torque Compensation
lower) is not sufficient.
Gain]
• Hunting or oscillation
• Torque at low speeds (10 Hz or
• E1-08 [Mid Point A Voltage]
lower) is not sufficient.
• E1-10 [Minimum Output
• Large initial vibration at start
up.
Speed precision is unsatisfactory.
C3-01 [Slip Compensation Gain]
(V/f Control)
• C5-01 [ASR Proportional Gain
Speed precision is unsatisfactory.
(Closed Loop V/f Control)
• C5-02 [ASR Integral Time 1
*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 [Drive Model (KVA) Selection] change.
*3 The default setting changes when the settings for A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection] change.
202
Table 4.17 Parameters for Fine Tuning the Drive (V/f and CL-V/f)
Parameter Number
• 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.
• 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.
• If torque at low speeds (10 Hz
or lower) is not sufficient,
increase the setting value.
• If there is large initial vibration
Voltage]
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.
1]
Adjust C5-01, C5-02.
*5
(I)]
Possible Solutions
1.00
1 (2 kHz)
*2
200 ms
1.00
• E1-08: 15.0 V
• E1-10: 9.0 V
0.0 (no slip compensation)
• C5-01: 0.20
• C5-02: 0.200 s
YASKAWA SIEPC71061737B GA800 Drive Technical Reference
Default Recommended Setting
0.10 - 2.00
*1
1 to upper limit value
100 ms to 1000 ms
0.50 - 1.50
*3
Default setting +/- 5 V
*3
0.5 - 1.5
• Proportional gain = 0.10 to 1.00
• Integral time = 0.100 to 2.000 s
*4