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ASR P and I
C5-01/02/03/04
Feed Forward
Control
n5-02/03
Frequency
reference after
Soft Starter
ASR Delay and
Torque Limits
C5-06, L7-
oo
+
+
+
-
Speed
Feedback
U6-26
U6-25
U1-16
Feed Forward Output
ASR Output
U1-09
Frequency
Reference
Feed Forward Torque
Compensation Value
Torque reference
Figure 5.104 Feed Forward Control
Note:
1.
Feed Forward can only be used in CLV, AOLV/PM, and CLV/PM control modes.
2.
Prior to using Feed Forward, always perform Auto-Tuning or manually enter the correct motor data. Perform ASR Auto-Tuning to set
the speed loop gain (C5-01), or adjust it manually. Fine-tune the other speed control loop parameters (C5-
oo
) if required.
3.
If not restricted by the application, use Inertia Auto Tuning (T1-01, T2-01 = 8) to automatically optimize Feed Forward parameters. If
Inertia Auto Tuning cannot be performed, manually set parameters related to Feed Forward.
n
n5-01: Feed Forward Control Selection
Enables and disables the Feed Forward function.
No.
Name
Setting Range
Default
n5-01
Feed Forward Control Selection
0, 1
0
Setting 0: Disabled
Setting 1: Enabled
n
n5-02: Motor Acceleration Time
Sets the time required to accelerate the motor from a full stop to the rated speed at the rated torque.
No.
Parameter Name
Setting Range
Default
n5-02
Motor Acceleration Time
0.001 to 10.000 s
Determined by
C6-01, E5-01 and
o2-04
Set this value automatically with Inertia Auto-Tuning. If Inertia Auto-Tuning cannot be performed, use one of the following
methods to determine the setting value for this parameter.
Calculation
The motor acceleration time can be calculated by one of the following formulas:
n5-02 =
π
J
Motor
n
rated
30 T
rated
Where:
• J
Motor
is the motor inertia in kgm/s
2.
• n
rated
is the rated speed of the motor in r/min.
• T
rated
is the rated torque of the motor in N•m.
or
n5-02 =
4
π
J
Motor
f
rated
p T
rated
Where:
• J
Motor
is the motor inertia in kgm
2
.
• f
rated
is the rated frequency of the motor in Hz.
• p is the number of motor poles (not pole pairs).
• T
rated
is the rated torque of the motor in N•m.
Measuring Acceleration Time
Take the following steps when measuring the motor acceleration time:
1.
Select the control mode; CLV (A1-02 = 3), AOLV/PM (A1-02 = 6), or CLV/PM (A1-02 = 7).
5.9 n: Special Adjustments
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
337
5
Parameter Details
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