Danfoss VLT AutomationDrive FC 301 Programming Manual page 87

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Activating PM Rotor Detection
6.3.2.3.4
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 drive performs the rotor detection. This does not harm the motor.
1.
Select [0] Rotor detection in parameter 1-70 Start Mode.

Rotor detection is now activated.
Activating PM Parking
6.3.2.3.5
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.
1. Select [1] Parking in parameter 1-70 Start Mode.

Parking is now activated.
Application-specific Adjustment when Running VVC+
6.3.2.3.6
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+ PM settings. See recommendations for various
applications in Table 12.
Table 12: Recommendations for Various Applications
Application
Low-inertia applications
I /I <5
Load Motor
Low-inertia applications 50>I
High-inertia applications I
Load
High load at low speed <30% (rated speed)
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
© 2024.09
/I >5
Load Motor
/I >50
Motor
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 Speedto 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.
AU275636650261en-003201 / 130R0334 |
Parameter Descriptions
87