Danfoss VLT AutomationDrive FC 300 Programming Manual page 38

Parameter Descriptions
1-07 Motor Angle Offset Adjust
This parameter is FC 302 only.
Option:
3 3
[2] Auto Every
Start
[3] Off
3.3.2 1-1* Special Settings
NOTE
The parameters within this parameter group cannot be
adjusted while the motor is running.
3.3.3 PM Settings
If [2] Std. PM, non salient is selected in 1-10 Motor
Construction, enter the motor parameters manually, in the
following order:
1. 1-24 Motor Current
2. 1-26 Motor Cont. Rated Torque
3. 1-25 Motor Nominal Speed
4. 1-39 Motor Poles
5. 1-30 Stator Resistance (Rs)
6. 1-37 d-axis Inductance (Ld)
7. 1-40 Back EMF at 1000 RPM
The following parameters have been added for PM motors.
1-41 Motor Angle Offset
1-07 Motor Angle Offset Adjust
1-14 Damping Gain
1-47 Low Speed Torque Calibration
1-58 Flystart Test Pulses Current
1-59 Flystart Test Pulses Frequency
1-70 PM Start Mode
30-20 High Starting Torque Time [s]
30-21 High Starting Torque Current [%]
NOTE
Standard parameters still need configuration (e.g. 4-19 Max
Output Frequency etc.).
36
VLT
Function:
motor data is changed no matter what
feedback device is selected.
Selecting [2] Auto Every Start will set the
frequency converter to automatically adjust the
motor angle offset every start.
Selecting [3] Off will turn off the automatic
offset adjust. This is valid only for PM motors.
MG33MG02 - VLT
®
AutomationDrive Programming Guide
Application
Low inertia applications
I /I <5
Load Motor
Low inertia applications
50>I /I
Load Motor
High inertia applications
I /I > 50
Load Motor
High load at low speed
<30% (rated speed)
Table 3.4 Recommendations for VVC
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.
Adjust starting torque in 1-66 Min. Current at Low Speed.
100% provides nominal torque as starting torque.
Application
Low inertia applications
High inertia applications
High load at low speed
Table 3.5 Recommendations for FLUX Applications
Adjust starting torque in 1-66 Min. Current at Low Speed.
100% provides nominal torque as starting torque.
1-10 Motor Construction
Option:
[0] Asynchron
[1] PM, non salient
SPM
®
is a registered Danfoss trademark
Settings
1-17 Voltage filter time const. to be
increased by factor 5 to 10
1-14 Damping Gain should be
reduced
1-66 Min. Current at Low Speed
should be reduced (<100%)
Keep calculated values
>5
1-14 Damping Gain, 1-15 Low Speed
Filter Time Const. and 1-16 High
Speed Filter Time Const. should be
increased
1-17 Voltage filter time const. should
be increased
1-66 Min. Current at Low Speed
should be increased (>100% for
longer time can overheat the motor)
plus
Applications
Settings
Keep calculated values
1-66 Min. Current at Low Speed
Increase speed to a value between
default and maximum depending on
application.
Set ramp times matching the
application. Too fast ramp up causes
an overcurrent/overtorque. Too fast
ramp down causes an overvoltage
trip.
1-66 Min. Current at Low Speed
Increase speed to a value between
default and maximum depending on
application.
Function:
Select the motor design type.
For asynchronous motors.
For salient or non-salient PM motors.