Closed Loop Vector Control Method - YASKAWA GA700 Technical Manual

Issue
C3-01 [Slip
Speed accuracy is poor.
Compensation Gain]
• The motor excitation
sound is significant.
C6-02 [Carrier Frequency
• Hunting, oscillation at
Selection]
low speeds (10 Hz or
lower)
• Insufficient torque at
• E1-08 [Mid Point A
low speeds.
• Speed response is slow.
• E1-10 [Minimum
• Significant shock upon
drive startup.
*1 Differs depending on settings for A1-02 [Control Method Selection] and o2-04 [Drive Model Selection], when at default settings.
*2 Differs depending on settings for A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection], when at default settings.
*3 Differs depending on settings for o2-04 [Drive Model Selection] and C6-01 [Normal / Heavy Duty Selection], when at default
settings.
*4 Suggested settings are for 200 V class drives. Voltage is double for 400 V class drives.
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Closed Loop Vector Control Method

Table 3.18 Parameters for Fine Tuning the Drive (Closed Loop Vector Control Method)
Issue
• High speed
• Low speed
• Torque, speed response
is slow.
• Hunting, oscillation
• High speed
• Low speed
ASR proportional gain or
integral time cannot be C5-07 [ASR Gain
established for low speed Switchover Frequency]
or high speed.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
3.10 Fine Tuning during Test Runs (Adjustment of Control Functionality)
Parameter Number
• Increase setting value in
increments of 0.1 if
speed is slow.
• Reduce setting value in
increments of 0.1 if
speed is fast.
• Raise the carrier
frequency if the motor
excitation sound is
significant.
• Lower the carrier
frequency if hunting or
oscillation occurs at
low speeds.
• Increase setting value
when torque, speed
response is slow.
• Reduce setting value if
there is marked shock
Voltage] upon drive startup.
Note:
Output Voltage]
If the setting value is
set too high, a large
torque reference may
be output even with
light loads.
Parameter Number
• Increase setting value in
C5-01 [ASR
increments of 5.00
Proportional Gain 1
when torque, speed
(P)]
response is slow.
• If hunting, oscillation
C5-03 [ASR
occurs, reduce the
Proportional Gain 2
setting value.
(P)]
*1
• Reduce setting value
C5-02 [ASR Integral when torque, speed
Time 1 (I)] response is slow.
• If hunting, oscillation
C5-04 [ASR Integral occurs, increase the
Time 2 (I)] setting value.
*1
Change the ASR
proportional gain and
ASR integral time in
*1
accordance with the
output frequency.
Solution Default Setting
1.0
*2
1(2 kHz)
*3
• E1-08: 11.0
• E1-10: 2.0
Solution Default Setting
20.00
0.500 s
0.0 Hz
Suggested Setting
0.5 - 1.5
0 to upper limit value
*2
Default setting +/- 2 V
*2
Suggested Setting
10.00 - 50.00
0.300 to 1.000 seconds
0.0 Hz to maximum
output frequency
*4
3
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