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

Commissioning
Test motor operation
1. Start the motor at low speed (100 to 200 rpm). If
the motor does not turn, check installation,
general programming and motor data.
2. Check if start function in 1-70 PM Start Mode fits
the application requirements.
Rotor detection
This function is the recommended selection for
applications where the motor starts from standstill, e.g.,
pumps or conveyors. On some motors, an acoustic sound
is heard when the adjustable frequency drive 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,
e.g., windmilling in fan applications. 2-06 Parking Current
and 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.
Start the motor at nominal speed. If the application does
+
not run well, check the VVC
dations for different applications can be seen in Table 5.7.
Application Settings
Low inertia applications Increase 1-17 Voltage Filter Time
I /I <5 Const. by factor 5 to 10.
Load Motor
Reduce 1-14 Damping Gain.
Reduce 1-66 Min. Current at Low
Speed (<100%).
Low inertia applications Keep default values.
50>I /I >5
Load Motor
High inertia applications Increase 1-14 Damping Gain,
I /I >50 1-15 Low Speed Filter Time Const. and
Load Motor
1-16 High Speed Filter Time Const.
High load at low speed Increase 1-17 Voltage Filter Time
<30% (rated speed) Const.
Increase 1-66 Min. Current at Low
Speed to adjust starting torque.
100% current provides nominal
torque as starting torque. This
parameter is independent from
30-20 High Starting Torque Time [s]
and 30-21 High Starting Torque
Current [%]). Working at current level
higher than 100% for a prolonged
time can overheat the motor.
Table 5.7 Recommendations for Different Applications
MG33AP22
Instruction Manual
+
PM settings. Recommen-
Danfoss A/S © Rev. 09/2014 All rights reserved.
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.
Application-specific adjustment when running Flux
Flux mode is the preferred control mode 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 chapter 5.4.3 Asynchronous Motor Set-up for application-
specific recommendations.

5.4.5 SynRM Motor Set-up with VVC

This section describes how to set up SynRM motor with
VVC + .
Initial programming steps
To activate SynRM motor operation, select [5] Sync.
Reluctance in 1-10 Motor Construction (FC-302 only).
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 data
sheet to program the following parameters in the listed
order:
1. 1-23 Motor Frequency
2. 1-24 Motor Current
3. 1-25 Motor Nominal Speed
4. 1-26 Motor Cont. Rated Torque
Run complete AMA using 1-29 Automatic Motor Adaptation
(AMA) [1] Enable Complete AMA or enter the following
parameters manually:
1. 1-30 Stator Resistance (Rs)
2. 1-37 d-axis Inductance (Ld)
3. 1-44 d-axis Inductance Sat. (LdSat)
4. 1-45 q-axis Inductance Sat. (LqSat)
5. 1-48 Inductance Sat. Point
5 5
+
29