YASKAWA AC Drive-A1000 User Manual

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Fine-Tuning Closed Loop Vector Control
Table 6.3 Parameters for Fine-Tuning the Performance in CLV
Problem Parameter No. Corrective Action Default
Suggested
Setting
• Poor torque or speed
response
• Motor hunting and
oscillation
ASR Proportional Gain 1
(C5-01)
ASR Proportional Gain 2
(C5-03)
<1>
• Gradually increase the ASR gain setting in increments of 5 if
motor torque and speed response are too slow.
• Reduce the setting if motor hunting and oscillation occur.
• Only adjust parameter C5-03 when C5-05 > 0.
• Perform ASR Auto-Tuning if possible.
20.00 10.00 to 50.00
• Poor torque or speed
response
• Motor hunting and
oscillation
ASR Integral Time 1
(C5-02)
ASR Integral Time 2
(C5-04)
<1>
• Reduce the setting if motor torque and speed response are too
slow.
• Increase the setting if motor hunting and oscillation occur.
• Only adjust parameter C5-04 when C5-05 > 0.
0.500 s 0.300 to 1.000 s
Difficulty maintaining the
ASR proportional gain or
the integral time at the low
or high end of the speed
range
ASR Gain Switching
Frequency (C5-07)
<1>
Switch the drive between two different ASR proportional gain and
integral time settings based on the output frequency.
0.0 Hz
0.0 to max output
frequency
Motor hunting and
oscillation
ASR Primary Delay
Time Constant (C5-06)
<1>
• Gradually reduce the setting in 0.01 s increments if motor torque
and speed response are too slow.
• Increase the setting if the load is less rigid and subject to
oscillation.
0.004 s 0.004 to 0.020 s
• Motor noise
• Control motor hunting
and oscillation occur at
speeds below 3 Hz
Carrier Frequency
Selection (C6-02)
• Increase the carrier frequency if there is too much motor noise.
• Reduce the carrier frequency if motor hunting and oscillation
occur at low speeds.
Note: The default setting for the carrier frequency depends on
the drive capacity (o2-04) and Drive Duty Selection
(C6-01).
1
2.0 kHz to max.
setting
Overshoot or undershoot
when the speed changes
with high inertia load
Feed Forward Control
(n5-01)
Inertia Tuning (T1-01 =
8)
Set parameter n5-01 to 1 to Enable Feed Forward then perform
Inertia Tuning. Manually set parameters C5-17, C5-18, and n5-03
if Inertia Tuning is not possible.
0 1
<1> Refer to C5: Automatic Speed Regulator (ASR) on page 161 for details on ASR.
u
Fine-Tuning Open Loop Vector Control for PM Motors
Table 6.4 Parameters for Fine-Tuning Performance in OLV/PM
Problem Parameter No. Corrective Action Default
Suggested
Setting
Undesirable motor
performance
Motor parameters
(E1-oo, E5-oo)
• Check the settings for base and maximum frequency in the
E1-oo parameters.
•
Check E5-oo parameters and set motor data correctly. Do
not enter line-to-line data where single-phase data is required,
and vice versa.
• Perform Auto-Tuning.
- -
Poor motor torque and
speed response
Load Inertia Ratio
(n8-55)
Adjust parameter n8-55 to meet the load inertia ratio of the
machine.
0
Close to the actual
load inertia ratio
Speed Feedback
Detection Gain (n8-45)
Increase the speed feedback detection gain (n8-45). 0.8
Increase in
increments of 0.05
Torque Compensation
(C4-01)
Enable torque compensation. 0 1
Oscillation at start or the
motor stalls
Pull-In Current during
Accel/Decel (n8-51)
Increase the pull-in current in n8-51 50%
Increase in steps
of 5%
DC Injection Braking
Current (b2-02), DC
Injection Time at Start
(b2-03)
Use DC Injection Braking at start to align the rotor. This may
cause a short reverse rotation at start.
b2-02 = 50%
b2-03 = 0.0 s
b2-03 = 0.5 s
Increase b2-02 if
needed
Load Inertia Ratio
(n8-55)
Increase the load inertia ratio. 0
Close to the actual
load inertia ratio
6.2 Motor Performance Fine-Tuning
292
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual

YASKAWA AC Drive-A1000 Specifications

General

Brand	YASKAWA
Model	AC Drive-A1000
Category	Controller
Language	English