5.9 n: Special Adjustments
Inertia Compensation Output
F ig u r e 5 .4 2 In e r tia C o m p e n s a t io n
Note: Prior to using Inertia Com pensation, 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.
Name
Setting Range
Default
n5-01
Inertia Compensation Selection
0 or 1
0
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.
Parameter Name
Setting Range
Default
n5-02
Motor Acceleration Time
0.001 to 10.000 s
Determined by o2-04
Calculation
The motor acceleration time can be calculated by,
Where:
—
- _
П JMotor П rated
• JMotor is the motor inertia in kgm2.
30 • Trated
• n ^ d is the rated speed o f the motor in r/min
• Trated is the rated torque o f the motor in N m
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.
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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