Synrm Motor Set-Up With Vvc - Danfoss VLT AutomationDrive FC 301 Operating Instructions Manual

Commissioning
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 5.4.3 Asynchronous Motor Set-up for application-
5 5
specific recommendations.

5.4.5 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 programme 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:
28
®
VLT AutomationDrive FC 301/302
+
+
SynRM settings. Table 5.8
Danfoss A/S © 07/2015 All rights reserved.
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.
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.
Dynamic applications Increase parameter 14-41 AEO
Minimum Magnetisation for highly
dynamic applications. Adjusting
parameter 14-41 AEO Minimum
Magnetisation ensures a good
balance between energy efficiency
and dynamics. Adjust
parameter 14-42 Minimum AEO
Frequency to specify the minimum
frequency at which the frequency
converter should use minimum
magnetisation.
Motor sizes less than 18 Avoid short ramp-down times.
kW
Table 5.8 Recommendations for Various Applications
If the motor starts oscillating at a certain speed, increase
parameter 1-14 Damping Gain. Increase the damping gain
value in small steps. Depending on the motor, this
parameter can be set to 10–100% higher than the default
value.
MG33AQ02