YASKAWA L1000A Technical Manual page 218

5.9 n: Special Adjustments
Figure 5.42
Speed
reference after
Soft Starter
U1-01
Note: Prior to using Inertia Compensation, always perform Auto-Tuning or set the correct motor data manually. and adjust the Speed
Control Loop.
■
n5-01: Inertia Compensation Selection
Enables or disables the Inertia Compensation function.
No.
n5-01
Setting 0: Disabled
Setting 1: Enabled
■
n5-02: Motor Acceleration Time
Sets the time required to accelerate the motor from a full stop up to the rated speed at the rated torque.
No.
n5-02
Calculation
The motor acceleration time can be calculated by,
π J
n
Motor rated
n5-02 =
30 T
rated
Measuring Acceleration Time
Take the following steps when measuring the motor acceleration time.
1.
Decouple motor and load.
2.
Perform Auto-Tuning or manually enter the correct motor data.
3.
Properly set up the speed loop (ASR).
4.
Set the acceleration time to zero.
5.
Set the forward torque limit in parameter L7-01 to 100%.
6.
Set the speed reference equal to the motor rated speed.
7.
While monitoring the motor speed in U1-05, start the motor in the forward direction and measure the time it takes
to reach the rated speed.
8.
Reverse the parameter settings above and set the measured time to parameter n5-02.
218
Inertia Compensation Torque
Compensation Value
Inertia
Compensation
n5-02/03
+
Speed
-
Reference
Speed
Feedback
Figure 5.42 Inertia Compensation
Name
Inertia Compensation Selection
Parameter Name
Motor Acceleration Time
Where:
• J is the motor inertia in kgm/s
Motor
• n is the rated speed of the motor in r/min
rated
• T is the rated torque of the motor in N⋅m.
rated
Inertia Compensation Output
U6-26
Speed Control
+
+
Loop P and I
C5-01/02/03/04
/13/14
U6-25
Speed Control Loop Output
2 .
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
common_TMonly
Speed Control
Torque reference
Loop Delay and
Torque Limits
C5-06, L7-
U1-09
Setting Range
0 or 1
Setting Range
0.001 to 10.000 s Determined by o2-04
Default
0
Default