Danfoss VLT AutomationDrive FC 301 Programming Manual page 38

Parameter Descriptions
1-07 Motor Angle Offset Adjust
This parameter is only valid for FC 302 and only in combination
with a PM motor with feedback.
Range:
3 3
[1] Auto
[2] Auto
Every
Start
[3] Off
3.3.2 1-1* Special Settings
NOTICE
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 Torque Calibration
1-58 Flystart Test Pulses Current
36
VLT
Function:
frequency converter to use the motor angle
offset entered in 1-41 Motor Angle Offset if an
absolute feedback device is used.
If an incremental feedback device is selected the
frequency converter automatically adjusts the
motor angle offset on the first start after the
power up or when the motor data is changed.
The frequency converter adjusts the motor angle
offset automatically on the first start after the
power up or when the motor data is changed no
matter what feedback device is selected. This
means that options [0] and [1] are identical for
the incremental encoder.
The frequency converter adjusts the motor angle
offset automatically on every start or when the
motor data is changed.
Selecting this option turns the automatic offset
adjustment off.
®
AutomationDrive FC 301/302 Programming Guide
1-59 Flystart Test Pulses Frequency
1-70 PM Start Mode
30-20 High Starting Torque Time [s]
30-21 High Starting Torque Current [%]
NOTICE
Standard parameters still need configuration
(e.g. 4-19 Max Output Frequency etc.).
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
MG33MH02 - Rev. 2013-09-30
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.