Danfoss VLT AQUA Drive FC 202 Programming Manual page 47

Parameter Description
Application Settings
Low-inertia applications Increase parameter 1-17 Voltage filter
I /I <5 time const. by factor 5–10.
Load Motor
Reduce parameter 1-14 Damping
Gain.
Reduce parameter 1-66 Min. Current
at Low Speed (<100%).
Low-inertia applications Keep the default values.
50>I /I >5
Load Motor
High-inertia applications Increase parameter 1-14 Damping
I /I >50 Gain, parameter 1-15 Low Speed Filter
Load Motor
Time Const., and parameter 1-16 High
Speed Filter Time Const.
High load at low speed Increase parameter 1-17 Voltage filter
<30% (rated speed) time const.
Increase parameter 1-66 Min. Current
at Low Speed to adjust the starting
torque. 100% current provides
nominal torque as starting torque.
Working at a current level higher
than 100% for a prolonged time can
cause the motor to overheat.
Table 3.4 Recommendations for Various Applications
If the motor starts oscillating at a certain speed, increase
parameter 1-14 Damping Gain. Increase the value in small
steps. Depending on the motor, this parameter can be set
to 10–100% higher than the default value.
3.3.5 SynRM Motor Set-up
This section describes how to set up a synchronous
reluctance motor.
Initial programming steps
To activate SynRM motor operation, select option [5]
SynRM in parameter 1-10 Motor Construction.
Programming motor data
After selecting option [5] SynRM, the SynRM motor-related
parameters in parameter groups 1-2* Motor Data, 1-3* Adv.
Motor Data, and 1-4* Adv. Motor Data II are active.
The necessary data can be found on the motor nameplate
and on the motor datasheet.
Program the following parameters in the order listed:
1. Parameter 1-24 Motor Current.
2. Parameter 1-25 Motor Nominal Speed.
3. Parameter 1-26 Motor Cont. Rated Torque.
4. Parameter 1-39 Motor Poles.
Run a complete AMA using parameter 1-29 Automatic
Motor Adaptation (AMA) [1] Enable Complete AMA.
If a complete AMA is not performed, configure the
following parameters manually:
MG20OB02
Programming Guide
1.
2.
3.
4.
5.
NOTICE
Motors may be missing some inductance values on the
nameplates or in the datasheets. Perform AMA to get the
valid values.
Test motor operation
1.
2.
Rotor detection
This function is the recommended selection for
applications where the motor starts from standstill, for
example pumps or conveyors. On some motors, a sound is
heard when the frequency converter performs the rotor
detection. This does not harm the motor.
Parking
This function is the recommended selection for
applications where the motor is rotating at slow speed, for
example windmilling in fan applications.
Parameter 2-06 Parking Current and parameter 2-07 Parking
Time can be adjusted. Increase the factory setting of these
parameters for applications with high inertia.
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.
Danfoss A/S © 05/2018 All rights reserved.
Parameter 1-30 Stator Resistance (Rs)
Enter the line-to-common stator winding
resistance (R ). If only line-line data is available,
s
divide the line-line value by 2 to get the line-
common value.
Parameter 1-37 d-axis Inductance (Ld)
Enter the line-to-common direct axis inductance
of the motor.
If only line-line data is available, divide the line-
line value by 2 to get the line-common value.
Parameter 1-38 q-axis Inductance (Lq).
Enter the line-to-common quadrature axis
inductance of the motor.
If only line-line data is available, divide the line-
line value by 2 to get the line-common value.
Parameter 1-44 d-axis Inductance Sat. (LdSat).
Enter the line-to-common saturated value of the
d-axis inductance. This is the value at a current
higher than the nominal current where the
inductance is fully saturated.
Parameter 1-48 Inductance Sat. Point.
Enter the percentage of nominal current where
the d-axis inductance is half-saturated, that is has
the average value of the non-saturated and
saturated values.
Start the motor at low speed (100–200 RPM). If
the motor does not turn, check the installation,
general programming, and motor data.
Check if the start function in parameter 1-70 Start
Mode fits the application requirements.
3 3
+
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