Load Depen. Setting - Danfoss VLT AutomationDrive FC 360 Programming Manual

Parameter Descriptions
1-56 U/f Characteristic - F
Range:
Size [ 0 -
related 400.0
*
Hz]
4 4

4.2.7 1-6* Load Depen. Setting

Parameters for adjusting the load-dependent motor
settings.
1-60 Low Speed Load Compensation
Range:
100 % [0 - 300
*
%]
1-61 High Speed Load Compensation
Range:
100 % [0 - 300
*
%]
1-62 Slip Compensation
Range:
Size [ -400 -
related 399.0 %]
*
34
Programming Guide
Function:
Enter frequency points to manually form a
U/f characteristic matching motor. Voltage at
each point is defined in parameter 1-55 U/f
Characteristic - U.
Make a U/f characteristic based on 6
definable voltages and frequencies, see
Illustration 4.3.
Motor Voltage
Par 1-55 [x]
1-55[5]
1-55[4]
1-55[3]
1-55[2]
1-55[1]
1-55[0]
1-56 1-56 1-56 1-56 1-56
[0] [1] [2] [3] [4]
Output Frequency
Par 1-56 [x]
Illustration 4.3 Example of U/f Charac-
teristic
Function:
Enter the low speed voltage compensation
value in percent. This parameter is used for
optimising the low speed load performance.
This parameter is only active if 1-10 Motor
Construction = [0] Asynchron.
Function:
Enter the high speed load voltage compen-
sation value in percent. This parameter is
used for optimising the high speed load
performance. This parameter is only active if
1-10 Motor Construction = [0] Asynchron
Function:
Enter the % value for slip compensation
to compensate for tolerance in the
value of n . Slip compensation is
M,N
calculated automatically, i.e. on the basis
of the rated motor speed n
Danfoss A/S © Rev. 2014-03-31 All rights reserved.
1-63 Slip Compensation Time Constant
Range:
0.1 s [ 0.05 - 5.00
*
s]
1-64 Resonance Dampening
Range:
100 [0 -
% 500 %]
*
1-56
[5]
1-65 Resonance Dampening Time Constant
Range:
0.005 s [ 0.001 -
*
0.05 s]
1-66 Min. Current at Low Speed
Range:
Size
related 200 %]
*
.
M,N
Function:
Enter the slip compensation reaction 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
parameter 1-64 Resonance Dampening and
parameter 1-65 Resonance Dampening Time
Constant to help eliminate high-frequency
resonance problems. To reduce resonance
oscillation, increase the value of
parameter 1-64 Resonance Dampening.
Function:
Set parameter 1-64 Resonance Dampening
and parameter 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.
Parameter 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.
4-16 Torque Limit Motor Mode and/or
4-17 Torque Limit Generator Mode automat-
ically adjust parameter 1-66 Min. Current at
Low Speed. The parameter with the highest
value adjusts parameter 1-66 Min. Current at
Low Speed. The current setting in
parameter 1-66 Min. Current at Low Speed is
composed of the torque generating current
and the magnetizing current.
Example: Set 4-16 Torque Limit Motor Mode
to 100% and set 4-17 Torque Limit Generator
Mode to 60%. Parameter 1-66 Min. Current at
Low Speed automatically adjusts to about
127%, depending on the motor size.
MG06C402