3.12 Controllability Problems and Possible Solutions
240
YASKAWA
SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Issue
Parameter Number
Possible Solutions
Default
Recommended Setting
Speed precision is unsatisfactory. C3-01 [Slip Compensation Gain]
•
If speed is too slow, increase
the setting value in 0.1 unit
increments.
•
If speed is too fast, decrease
the setting value in 0.1 unit
increments.
1.0
0.5 - 1.5
•
The volume of the motor
excitation sound is too high.
•
Hunting or oscillation at low
speeds (10 Hz or lower)
C6-02 [Carrier Frequency
Selection]
•
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.
1 (2 kHz)
0 to upper limit value
•
Torque at low speeds is not
sufficient.
•
Speed response is slow.
•
Large initial vibration at start
up.
•
E1-08 [Mid Point AVoltage]
•
E1-10 [Minimum Output
Voltage]
•
If torque or speed response are
slow, increase the setting
value.
•
If there is large initial
vibration at start up, decrease
the setting value
Note:
If you set the value too high,
the drive can output a large
torque reference although the
load is light.
•
E1-08: 14.4
•
E1-10: 3.0
Default s/- 2 V
*1
The default setting changes when the settings for
A1-02 [Control Method Selection] and o2-04 [Drive Model (KVA) Selection]
change.
*2
The default setting changes when the settings for
A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection]
change.
*3
The default setting changes when the setting for
o2-04 [Drive Model Selection]
changes.
*4
Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
◆
Closed Loop Vector Control
Table 3.31 Parameters for Fine Tuning the Drive (CLV Control)
Problem
Parameter Number
Solution
Default
Recommended Value
•
Torque, speed response is
slow.
•
Hunting, oscillation
•
High speed
C5-01 [ASR Proportional Gain
1]
•
Low speed
C5-03 [ASR Proportional Gain
2]
•
Increase setting value in
increments of 5.00 when
torque, speed response is slow.
•
If hunting, oscillation occurs,
decrease the setting value.
20.00
10.00 - 50.00
•
High speed
C5-02 [ASR Integral Time 1]
•
Low speed
C5-04 [ASR Integral Time 2]
•
Decrease setting value when
torque, speed response is slow.
•
If hunting, oscillation occurs,
increase the setting value.
0.500 s
0.300 s - 1.000 s
ASR proportional gain or integral
time cannot be established for
low speed or high speed.
C5-07 [ASR Gain Switchover
Change the ASR proportional
gain and ASR integral time in
accordance with the output
frequency.
0.0 Hz
0.0 Hz to maximum output
frequency
Hunting, oscillation
C5-06 [ASR Delay Time]
•
Decrease setting value in
increments of 0.010 when
torque, speed response is slow.
•
Increase setting value when
vibration is likely to occur due
to poor machine rigidity.
0.004 s
0.004 s - 0.020 s
•
The motor excitation sound is
significant.
•
Hunting, oscillation at low
speeds (3 Hz or lower)
C6-02 [Carrier Frequency
Selection]
•
Increase the carrier frequency
if the motor excitation sound is
significant.
•
Decrease the carrier frequency
if hunting or oscillation occurs
at low speeds.
1 (2.0 kHz)
2.0 kHz to upper limit value
*1
For more information about speed control (ASR), refer to the section where the
C5 parameter
is explained.
*2
Differs depending on setting for
o2-04 [Drive Model (KVA) Selection]
, when at default settings.
◆
AOLV Control
Table 3.32 Parameters for Fine Tuning the Drive (AOLV Control)
Problem
Parameter Number
Solution
Default
Recommended Value
•
oS [Overspeed]
occurs.
•
Hunting, oscillation occurs.
T1-01 [Auto-Tuning Mode
Selection]
•
Confirm that the output of the
drive and the motor are
connected properly.
•
Perform Rotational Auto-
Tuning for the motor by itself.
-
0
The motor excitation sound is
significant.
C6-02 [Carrier Frequency
Selection]
Increase the carrier frequency if
the motor excitation sound is
significant.
1 (2 kHz)
1 to upper limit value
Содержание CR700
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Страница 422: ...7 7 Storage Guidelines 422 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual ...
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Страница 837: ...EZZ023535 2 35 1 Revision History Revision Revised Content Date First Edition 2017 08 ...
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