Closed Loop Vector Control Method - YASKAWA GA700 Technical Manual

3.10 Fine Tuning during Test Runs (Adjust the Control Function)
Issue
C3-02 [Slip
• Speed response is slow.
Compensation Delay
• Speed is not stable.
Time]
Speed precision is C3-01 [Slip
unsatisfactory. Compensation Gain]
• The volume of the
motor excitation sound
is too high.
C6-02 [Carrier Frequency
Selection]
• Hunting or oscillation
at low speeds (10 Hz or
lower)
• Torque at low speeds
(10 Hz or lower) is not
• E1-08 [Mid Point A
sufficient. speed
response is slow.
• E1-10 [Minimum
• Speed response is slow.
• Large initial vibration
at start up.
*1 Default value changes when A1-02 [Control Method Selection] and o2-04 [Drive Model (KVA) Selection] values change.
*2 Default value changes when A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection] values change.
*3 Default value changes when o2-04 [Drive Model (KVA) Selection] and C6-01 [Normal / Heavy Duty Selection] values change.
*4 Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
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Closed Loop Vector Control Method

Table 3.19 Parameters for Fine Tuning the Drive (Closed Loop Vector Control Method)
Issue
• High speed
• Low speed
• Torque or speed
response are slow.
• Hunting or oscillation
• High speed
• Low speed
The drive cannot find
ASR proportional gain or C5-07 [ASR Gain
integral time for low Switchover Frequency]
speed or high speed.
208
Parameter Number
• If speed response is
slow, decrease the
setting value in
increments of 10 ms.
• If speed is not stable,
increase the value in
increments of 10 ms.
• If speed is too slow,
increase the setting
value in increments of
0.1.
• If speed is too fast,
decrease the setting
value in increments of
0.1.
• 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.
• If torque or speed
response are slow,
increase the setting
value.
• If there is large initial
vibration at start up,
Voltage] decrease the setting
value
Output Voltage] Note:
If the setting value is
set too high, a large
torque reference may
be output even with
light loads.
Parameter Number
• If torque or speed
C5-01 [ASR response are slow,
Proportional Gain 1 increase the setting
(P)] value in increments of
5.00.
• If hunting or oscillation
C5-03 [ASR
Proportional Gain 2 occur, decrease the
(P)] setting value.
*1
• If torque or speed
response are slow,
C5-02 [ASR Integral
decrease the setting
Time 1 (I)]
value.
• If hunting or oscillation
C5-04 [ASR Integral
occur, increase the
Time 2 (I)]
*1
setting value.
Change the ASR
proportional gain and
ASR integral time to
*1
conform to the output
frequency.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Solution Default Setting
200 ms
*1
1.0
*2
1 (2 kHz)
• E1-08: 11.0
• E1-10: 2.0
Solution Default Setting
20.00
0.500 s
0.0 Hz
Recommended
Setting
100 - 500 ms
0.5 - 1.5
0 to upper limit value
*3
*2
Default setting +/- 2 V
*2
Recommended
Setting
10.00 - 50.00
0.300 to 1.000 s
0.0 Hz to maximum
output frequency
*4