YASKAWA
SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
609
If you enable the slip compensation function during regeneration, the quantity of regeneration can increase
immediately. In this condition, it is necessary to use a dynamic braking option (braking resistor or braking resistor
unit).
0 : Disabled
The drive will not do Slip compensation during regeneration.
The load and operation status (regenerative operation) can cause the motor speed to be higher or lower than the
frequency reference.
1 : Enabled Above 6Hz
The slip compensation function is enabled during regeneration. Slip compensation is disabled at output
frequencies of 6 Hz or less.
2 : Enabled Above C3-15
The drive uses
E2-02 [Motor Rated Slip]
to automatically calculate the frequency range where it will disable slip
compensation function during regeneration.
Slip compensation is enabled at frequencies as low as 2 Hz.
■
C3-28: Adaptive Slip Control Mode
No.
(Hex.)
Name
Description
Default
(Range)
C3-28
(1B5B)
Expert
Adaptive Slip Control
Mode
Sets the slip compensation function mode.
0
(0, 1)
0 : Normal
1 : Advanced
Note:
Set
C3-28 = 0
for better torque precision. If the torque precision does is not better, set
C3-28 = 1
and increase the value of
n4-65 [Flux
Estimate Response@High Freq]
or
n4-66 [Flux Estimate Response @Low Freq]
in 0.1-unit increments. Then, you must do Rotational
Auto-Tuning.
◆
C4: Torque Compensation
Torque compensation is a function that increases voltage to increase output torque as compensation for
insufficient torque production at start-up or low-speed operation.
Voltage drops due to motor winding resistance cause torque generating voltage to decrease, which causes
insufficient torque. If the main circuit cable connecting the drive and motor is long, this can also cause insufficient
torque due to voltage drops.
Note:
Set the motor parameters and V/f pattern properly before setting
C4 parameters
.
■
C4-01: Torque Compensation Gain
No.
(Hex.)
Name
Description
Default
(Range)
C4-01
(0215)
RUN
Torque Compensation Gain
Sets the gain for the torque compensation function. Use this parameter value for motor 1 when
operating multiple motors.
Determined by A1-02
(0.00 - 2.50)
In V/f Control or CL-V/f Control, adjust the value set to
C4-01
in 0.05 unit increments for these conditions:
•
When torque is not sufficient during low-speed operation of 10 Hz or less, increase the setting value
•
When there is vibration in the motor or when the motor hunts when operating the drive with a light load,
decrease the setting value
•
When you use a long motor cable, increase the setting value.
Note:
•
Adjust
C4-01
to make sure that the output current is not more than the drive rated current during low-speed operation.
•
Usually, do not change this parameter in OLV Control. Torque accuracy is decreased.
V/f
CL-V/f
OLV
CLV
AOLV
V/f
CL-V/f
OLV
CLV
AOLV
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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