Danfoss VLT AutomationDrive FC 301 Programming Manual page 46

Parameter Descriptions
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
3 3
adjustments. Run a complete AMA for best performance.
Start the motor at nominal speed. If the application does
not run well, check the VVC
contains recommendations for various applications.
Application
Low-inertia applications
I /I <5
Load Motor
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 3.4 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.
Application-specific adjustment when running flux
Flux control principle is the preferred control principle for
optimum shaft performance in dynamic applications.
Perform an AMA because this control mode requires
precise motor data. Depending on the application, further
adjustments may be required.
See chapter 3.3.3 Asynchronous Motor Set-up for application-
specific recommendations.
44
®
VLT AutomationDrive FC 301/302
+
+ PM settings. Table 3.4
Settings
Increase parameter 1-17 Voltage filter
time const. by factor 5–10.
Reduce parameter 1-14 Damping
Gain.
Reduce parameter 1-66 Min. Current
at Low Speed (<100%).
Keep the default values.
Increase parameter 1-14 Damping
Gain, parameter 1-15 Low Speed Filter
Time Const., and parameter 1-16 High
Speed Filter Time Const.
Increase parameter 1-17 Voltage filter
time const.
Increase parameter 1-66 Min. Current
at Low Speed to adjust the starting
torque. 100% current provides
nominal torque as starting torque.
This parameter is independent of
parameter 30-20 High Starting Torque
Time [s] and parameter 30-21 High
Starting Torque Current [%]). Working
at a current level higher than 100%
for a prolonged time can cause the
motor to overheat.
Danfoss A/S © 02/2016 All rights reserved.
3.3.5 SynRM Motor Set-up with VVC
This section describes how to set up a SynRM motor with
+
VVC .
NOTICE
The SmartStart wizard covers the basic configuration of
SynRM motors.
Initial programming steps
To activate SynRM motor operation, select [5] Sync.
Reluctance in parameter 1-10 Motor Construction.
Programming motor data
After performing the initial programming steps, 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.
Use the motor nameplate data and the motor datasheet to
program the following parameters in the order listed:
1. Parameter 1-23 Motor Frequency.
2. Parameter 1-24 Motor Current.
3. Parameter 1-25 Motor Nominal Speed.
4. Parameter 1-26 Motor Cont. Rated Torque.
Run a complete AMA using parameter 1-29 Automatic
Motor Adaptation (AMA) [1] Enable Complete AMA or enter
the following parameters manually:
1. Parameter 1-30 Stator Resistance (Rs).
2. Parameter 1-37 d-axis Inductance (Ld).
3. Parameter 1-44 d-axis Inductance Sat. (LdSat).
4. Parameter 1-45 q-axis Inductance Sat. (LqSat).
5. Parameter 1-48 Inductance Sat. Point.
Application-specific adjustments
Start the motor at nominal speed. If the application does
+
not run well, check the VVC
provides application-specific recommendations:
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.
+
SynRM settings. Table 3.5
MG33ML02