Danfoss VLT AutomationDrive FC 301 Programming Manual page 38

Parameter Descriptions
1-07 Motor Angle Offset Adjust
Range:
3 3
0 [Manual] The functionality of this option depends on the
*
[1] Auto
[2] Auto
Every
Start
[3] Off
[4] Once with
Store
3.2.2 1-1* Special Settings
NOTICE
The parameters within this parameter group cannot be
adjusted while the motor is running.
3.2.3 Asynchronous Motor Set-up
Enter the following motor data. Find the information on
the motor nameplate.
1. Parameter 1-20 Motor Power [kW] or
parameter 1-21 Motor Power [HP].
2. Parameter 1-22 Motor Voltage.
3. Parameter 1-23 Motor Frequency.
4. Parameter 1-24 Motor Current.
5. Parameter 1-25 Motor Nominal Speed.
36
VLT
Function:
NOTICE
This parameter is only valid for FC 302
and only in combination with a PM motor
with feedback.
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 power-
up, or when the motor data is changed.
The frequency converter adjusts the motor angle
offset automatically on the first start after power-
up, or when the motor data is changed no
matter what feedback device is selected. This
means that options Manual and Auto 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.
This option updates parameter 1-41 Motor Angle
Offset automatically when the angle value is 0.
This option is valid only for absolute feedback
devices. The function uses rotor detection and
then applies DC hold to make the offset
adjustment more accurate.
Danfoss A/S © 01/2018 All rights reserved.
®
AutomationDrive FC 301/302
When running in flux control principle, or for optimum
performance in VVC
set up the following parameters. Find the data in the
motor datasheet (this data is typically not available on the
motor nameplate). Run a complete automatic motor
adaptation (AMA) using parameter 1-29 Automatic Motor
Adaptation (AMA) [1] Enable Complete AMA or enter the
parameters manually. Parameter 1-36 Iron Loss Resistance
(Rfe) is always entered manually.
1. Parameter 1-30 Stator Resistance (Rs).
2. Parameter 1-31 Rotor Resistance (Rr).
3. Parameter 1-33 Stator Leakage Reactance (X1).
4. Parameter 1-34 Rotor Leakage Reactance (X2).
5. Parameter 1-35 Main Reactance (Xh).
6. Parameter 1-36 Iron Loss Resistance (Rfe).
Application-specific adjustment when running VVC
+
VVC is the most robust control mode. In most situations,
it provides optimum performance without further
adjustments. Run a complete AMA for best performance.
Application-specific adjustment when running flux
Flux control principle is the preferred control principle for
optimum shaft performance in dynamic applications.
Perform an AMA since this control mode requires precise
motor data. Depending on the application, further
adjustments may be required.
See Table 3.3 for application-related recommendations.
Application
Low-inertia applications
High-inertia applications
High load at low speed
No-load application
+
mode, extra motor data is required to
Settings
Keep calculated values.
Parameter 1-66 Min. Current at Low
Speed.
Increase current to a value between
default and maximum depending on
the application.
Set ramp times matching the
application. Too fast ramp up causes
an overcurrent or overtorque. Too
fast ramp down causes an
overvoltage trip.
Parameter 1-66 Min. Current at Low
Speed.
Increase current to a value between
default and maximum depending on
the application.
Adjust parameter 1-18 Min. Current at
No Load to achieve smoother motor
operation by reducing torque ripple
and vibration.
+
MG33MO02