Danfoss VLT AutomationDrive FC 301 Programming Manual page 46

Parameter Descriptions
1-60 Low Speed Load Compensation
Range:
3 3
Motor size
0.25 kW-7.5 kW
U
m
Par.1-60
100%
60%
0%
Illustration 3.11 Changeover
1-61 High Speed Load Compensation
Range:
100 % [0 -
*
300 %]
Motor size
0.25 kW - 7.5 kW
Table 3.7
1-62 Slip Compensation
Range:
Size [-500
related - 500
*
%]
44
VLT
Function:
frequency range within which this parameter is
active.
Changeover
<10 Hz
Changeover
Function:
Enter the % value to compensate voltage in
relation to load when the motor is running at
high speed and obtain the optimum U/f
characteristic. The motor size determines the
frequency range within which this parameter is
active.
Changeover
> 10 Hz
Function:
Enter the % value for slip compensation, to
compensate for tolerances in the value of
n . Slip compensation is calculated
M,N
automatically, i.e. on the basis of the rated
motor speed n .
M,N
This function is not active when 1-00 Config-
uration Mode is set to [1] Speed closed loop
or [2] Torque Torque control with speed
feedback or when 1-01 Motor Control
Principle is set to [0] U/f special motor mode.
®
AutomationDrive FC 301/302 Programming Guide
1-63 Slip Compensation Time Constant
Range:
Size related
*
NOTICE
Par.1-61
1-63 Slip Compensation Time Constant has no effect when
1-10 Motor Construction = [1] PM, non salient SPM.
1-64 Resonance Dampening
Range:
100 % [0 -
*
500 %]
f
out
NOTICE
1-64 Resonance Dampening has no effect when
1-10 Motor Construction = [1] PM, non salient SPM.
1-65 Resonance Dampening Time Constant
Range:
5 ms [5 - 50
*
ms]
NOTICE
1-65 Resonance Dampening Time Constant has no effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
1-66 Min. Current at Low Speed
Range:
Size
related - 200
*
%]
MG33MH02 - Rev. 2013-09-30
Function:
[0.05 - Enter the slip compensation reaction
5 s] speed. A high value results in slow
reaction, and a low value results in quick
reaction. If low-frequency resonance
problems arise, use a longer time
setting.
Function:
Enter the resonance dampening value. Set
1-64 Resonance Dampening and 1-65 Resonance
Dampening Time Constant to help eliminate
high-frequency resonance problems. To reduce
resonance oscillation, increase the value of
1-64 Resonance Dampening.
Function:
Set 1-64 Resonance Dampening and
1-65 Resonance Dampening Time Constant to
help eliminate high-frequency resonance
problems. Enter the time constant that
provides the best dampening.
Function:
[ 1 Enter the minimum motor current at low
speed, see 1-53 Model Shift Frequency.
Increasing this current improves motor torque
at low speed.
1-66 Min. Current at Low Speed is enabled when
1-00 Configuration Mode [0] Speed open loop
only. The frequency converter runs with
constant current through motor for speeds
below 10 Hz.
For speeds above 10 Hz, the motor flux model
in the frequency converter controls the motor.
4-16 Torque Limit Motor Mode and/or
4-17 Torque Limit Generator Mode automatically
adjust 1-66 Min. Current at Low Speed. The