Automatic Motor Adaptation; Check Motor Rotation - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Start Up and Functional Tes...
Recommendations in different applications can be seen in
Table 3.2.
Application
Low inertia applications
I /I <5
Load Motor
3 3
Low inertia applications
50>I /I >5
Load Motor
High inertia applications
I /I > 50
Load Motor
High load at low speed
<30% (rated speed)
Table 3.2 Recommendations in Different Applications
If the motor starts oscillating at a certain speed, increase
1-14 Damping Gain. Increase the value in small steps.
Depending on the motor, a good value for this parameter
can be 10% or 100% higher than the default value.
Starting torque can be adjusted in 1-66 Min. Current at Low
Speed. 100% provides nominal torque as starting torque.

3.5 Automatic Motor Adaptation

Automatic motor adaptation (AMA) is a test procedure that
measures the electrical characteristics of the motor to
optimize compatibility between the frequency converter
and the motor.
•
The frequency converter builds a mathematical
model of the motor for regulating output motor
current. The procedure also tests the input phase
balance of electrical power. It compares the
motor characteristics with the data entered in
parameters 1-20 to 1-25.
•
It does not cause the motor to run or harm to
the motor
•
Some motors may be unable to run the complete
version of the test. In that case, select [2] Enable
reduced AMA
•
If an output filter is connected to the motor,
select Enable reduced AMA
•
If warnings or alarms occur, see 8 Warnings and
Alarms
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28
®
VLT AQUA Drive
Operating Instructions
Settings
1-17 Voltage filter time const. to be
increased by factor 5 to 10
1-14 Damping Gain should be
reduced
1-66 Min. Current at Low Speed
should be reduced (<100%)
Keep calculated values
1-14 Damping Gain, 1-15 Low Speed
Filter Time Const. and 1-16 High
Speed Filter Time Const. should be
increased
1-17 Voltage filter time const. should
be increased
1-66 Min. Current at Low Speed
should be increased (>100% for
longer time can overheat the motor)
MG20M902 - VLT
•
Run this procedure on a cold motor for best
results
NOTE
The AMA algorithm does not work when using PM motors.
To run AMA
1. Press [Main Menu] to access parameters.
2. Scroll to parameter group 1-** Load and Motor.
3. Press [OK].
4. Scroll to parameter group 1-2* Motor Data.
5. Press [OK].
6. Scroll to 1-29 Automatic Motor Adaptation (AMA).
7. Press [OK].
8. Select [1] Enable complete AMA.
9. Press [OK].
10. Follow on-screen instructions.
11. The test will run automatically and indicate when
it is complete.

3.6 Check Motor Rotation

Before running the frequency converter, check the motor
rotation. The motor will run briefly at 5 Hz or the
minimum frequency set in 4-12 Motor Speed Low Limit [Hz].
1. Press [Main Menu].
2. Press [OK].
3. Navigate to 1-28 Motor Rotation Check.
4. Press [OK].
5. Scroll to [1] Enable.
The following text will appear: Note! Motor may run in
wrong direction.
6. Press [OK].
7. Follow the on-screen instructions.
To change the direction of rotation, remove power to the
frequency converter and wait for power to discharge.
Reverse the connection of any two of the three motor
cables on the motor or frequency converter side of the
connection.
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is a registered Danfoss trademark