Permanent Magnet Motor Set-Up - Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual

Commissioning
10. Make the application-specific settings in the
following parameters:
10a Parameter 3-02 Minimum Reference.
10b Parameter 3-03 Maximum Reference.
10c Parameter 3-41 Ramp 1 Ramp Up Time.
10d Parameter 3-42 Ramp 1 Ramp Down
Time.
10e Parameter 3-13 Reference Site. Linked to
Hand/Auto Local Remote.
5.4.4 Asynchronous Motor Set-up
Enter the following motor data. The information can be
found on the motor nameplate.
1. Parameter 1-20 Motor Power [kW] or
parameter 1-21 Motor Power [HP].
2. Parameter 1-22 Motor Voltage.
3. Parameter 1-23 Motor Frequency.
4. Parameter 1-24 Motor Current.
5. Parameter 1-25 Motor Nominal Speed.
When running in flux control principle, or for optimum
performance in VVC + mode, extra motor data is required to
set up the following parameters. Find the data in the
motor datasheet (this data is typically not available on the
motor nameplate). Run a complete AMA using
parameter 1-29 Automatic Motor Adaptation (AMA) [1]
Enable Complete AMA or enter the parameters manually.
Parameter 1-36 Iron Loss Resistance (Rfe) is always entered
manually.
1. Parameter 1-30 Stator Resistance (Rs).
2. Parameter 1-31 Rotor Resistance (Rr).
3. Parameter 1-33 Stator Leakage Reactance (X1).
4. Parameter 1-34 Rotor Leakage Reactance (X2).
5. Parameter 1-35 Main Reactance (Xh).
6. Parameter 1-36 Iron Loss Resistance (Rfe).
Application-specific adjustment when running VVC
VVC + is the most robust control mode. In most situations,
it provides optimum performance without further
adjustments. Run a complete AMA for best performance.
Application-specific adjustment when running Flux
Flux control principle is the preferred control principle for
optimum shaft performance in dynamic applications.
Perform an AMA since this control mode requires precise
motor data. Depending on the application, further
adjustments may be required.
See Table 5.7 for application-related recommendations.
MG16N102
Operating Instructions
Application
Low-inertia applications
High-inertia applications
High load at low speed
No-load application
Flux sensorless control
principle only
Table 5.7 Recommendations for Flux Applications

5.4.5 Permanent Magnet Motor Set-up

NOTICE
+
Only use permanent magnet (PM) motor with fans and
pumps.
Initial programming steps
1.
2.
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Settings
Keep calculated values.
Parameter 1-66 Min. Current at Low
Speed.
Increase current to a value between
default and maximum depending on
the application.
Set ramp times matching the
application. Too fast ramp up causes
an overcurrent or overtorque. Too
fast ramp down causes an
overvoltage trip.
Parameter 1-66 Min. Current at Low
Speed.
Increase current to a value between
default and maximum depending on
the application.
Adjust parameter 1-18 Min. Current at
No Load to achieve smoother motor
operation by reducing torque ripple
and vibration.
Adjust parameter 1-53 Model Shift
Frequency.
Example 1: If the motor oscillates at
5 Hz and dynamics performance is
required at 15 Hz, set
parameter 1-53 Model Shift Frequency
to 10 Hz.
Example 2: If the application
involves dynamic load changes at
low speed, reduce
parameter 1-53 Model Shift Frequency.
Observe the motor behaviour to
make sure that the model shift
frequency is not reduced too much.
Symptoms of inappropriate model
shift frequency are motor oscillations
or frequency converter tripping.
Activate PM motor operation in
parameter 1-10 Motor Construction, select [1] PM,
non-salient SPM.
Set parameter 0-02 Motor Speed Unit to [0] RPM.
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