Danfoss VLT AutomationDrive FC 302 Programming Manual page 40

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:
0 [Manual]
*
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
parameter 1-10 Motor Construction, enter the motor
parameters manually, in the following order:
1. parameter 1-24 Motor Current
2. parameter 1-26 Motor Cont. Rated Torque
3. parameter 1-25 Motor Nominal Speed
4. parameter 1-39 Motor Poles
5. parameter 1-30 Stator Resistance (Rs)
6. parameter 1-37 d-axis Inductance (Ld)
7. parameter 1-40 Back EMF at 1000 RPM
The following parameters have been added for PM motors.
parameter 1-41 Motor Angle Offset
parameter 1-07 Motor Angle Offset Adjust
38
VLT
Function:
The functionality of this option depends on
the type of the feedback device. This option
sets the frequency converter to use the motor
angle offset entered in parameter 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
parameter 1-14 Damping Gain
parameter 1-47 Torque Calibration
parameter 1-58 Flystart Test Pulses Current
parameter 1-59 Flystart Test Pulses Frequency
parameter 1-70 PM Start Mode
parameter 30-20 High Starting Torque Time [s]
parameter 30-21 High Starting Torque Current [%]
NOTICE
Standard parameters still need configuration (e.g.
parameter 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.
MG33MI02 - Rev. 2013-11-20
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,
parameter 1-15 Low Speed Filter Time
Const. and parameter 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