Danfoss VLT AutomationDrive FC 360 Quick Manual page 32

Local Control Panel and Pro...
Test motor operation
1. Start the motor at low speed (100`1200 RPM). If
the motor does not turn, check installation,
general programming, and motor data.
2. Check if the start function in parameter 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, for
example pumps or conveyors. For some motors, a sound is
heard when the frequency converter performs the rotor
5 5
detection. This sound does not harm the motor. Adjust the
value in parameter 1-46 Position Detection Gain for different
motors. If the frequency converter fails to start, or an
overcurrent alarm occurs when the frequency converter
starts, check if the rotor is blocked or not. If the rotor is
not blocked, set parameter 1-70 PM Start Mode to [1]
Parking and try again.
30
®
VLT AutomationDrive FC 360
Parking
This function is the recommended option for applications
where the motor is rotating at low speed, for example
windmilling in fan applications. Parameter 2-06 Parking
Current and parameter 2-07 Parking Time are adjustable.
Increase the factory setting of these parameters for
applications with high inertia.
Start the motor at nominal speed (100–200 RPM). If the
application does not run well, check the VVC
Table 5.7 shows recommendations in different applications.
Application
Low inertia applications
1)
I
Load
Medium inertia
applications
50>I
High inertia applications
I /I
Load
High load at low speed
<30% (rated speed)
Table 5.7 Recommendations in Different Applications
1) I
Load
2) I
Motor
If the motor starts oscillating at a certain speed, increase
parameter 1-14 Damping Gain. Increase the value in small
steps.
Adjust the starting torque in parameter 1-66 Min. Current at
Low Speed. 100% provides nominal torque as starting
torque.
Danfoss A/S © 04/2015 All rights reserved.
Settings
•
Increase the value for
2) parameter 1-17 Voltage filter time
/I <5
Motor
const. by factor 5 to 10.
•
Reduce the value for
parameter 1-14 Damping Gain.
•
Reduce the value (<100%) for
parameter 1-66 Min. Current at
Low Speed.
Keep calculated values.
/I >5
Load Motor
Increase the values for
> 50 parameter 1-14 Damping Gain,
Motor
parameter 1-15 Low Speed Filter Time
Const., and parameter 1-16 High
Speed Filter Time Const.
Decrease parameter 1-17 Voltage
filter time const.
Decrease parameter 1-66 Min. Current
at Low Speed (>100% for longer time
can overheat the motor).
=The inertia of load.
=The inertia of motor
+ PM settings.
MG06A602