Open Loop Vector Control Method For Pm - YASKAWA GA700 Technical Manual

Issue
• C5-07 [ASR Gain
• High speed
Speed response cannot be
secured for low speed or
high speed.
• Low speed
C5-06 [ASR Delay Time]
Hunting, oscillation
*4
*1 Differs depending on settings for o2-04 [Drive Model Selection] and C6-01 [Normal / Heavy Duty Selection], when at default
settings.
*2 Differs depending on setting for o2-04 [Drive Model Selection], when at default settings.
*3 For details on speed control (ASR), see the section where the C5 parameter is explained.
*4 The optimal values for a no-load operation can differ from the optimal values for actual loading operation.
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Open Loop Vector Control Method for PM

Table 3.20 Parameters for Fine Tuning the Drive (Open Loop Vector Control Method for PM)
Issue
Motor not operating E1 parameter, E5
according to settings. parameter
n8-55 [Load Inertia]
n8-45 [Spd Feedback
Detect Control Gain]
Torque, speed response is
slow.
C4-01 [Torque
Compensation Gain]
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
3.10 Fine Tuning during Test Runs (Adjustment of Control Functionality)
Parameter Number
Switchover Frequency]
*4
C5-01 [ASR
Proportional Gain 1
Change the ASR
(P)]
proportional gain and
C5-02 [ASR Integral
ASR integral time in
Time 1 (I)]
accordance with the
output frequency.
C5-03 [ASR
Proportional Gain 2
(P)]
*3
C5-04 [ASR Integral
Time 2 (I)]
• Reduce setting value in
increments of 0.010
when torque, speed
response is slow.
• Raise setting value
when vibration is likely
to occur due to poor
machine rigidity.
Parameter Number
• Check the settings for
E1-06, E1-04 [Base
Frequency, Maximum
Output Frequency].
• Check the E5
parameters and ensure
that all motor data has
been set correctly.
Note:
Do not set the value of
line-to-line resistance
to the stator resistance
of the motor (r1) (E5-
05).
• Perform Auto-Tuning.
Set the ratio according to
the motor's inertia and that
of the application
machine.
Reduce the setting value.
Adjust the setting value.
Note:
If the value is set too
high, it can result in
overcompensation,
which may cause
motor oscillation.
Solution Default Setting
0.0 Hz
0.004 s
Solution Default Setting
-
0
0.80
0.00
Suggested Setting
0.0 to maximum output
frequency
0.004 to 0.020 seconds
Suggested Setting
-
Adjust to match the actual
inertia ratio.
Change in increments of
0.05.
1.00
169
3