Danfoss VLT Automation Drive FC 360 Programming Manual page 35

Parameter Descriptions
1-56 U/f Characteristic - F
Range: Function:
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
[0]
Illustration 4.3 Example of U/f Charac-
teristic
4.2.7 1-6* Load Depen. Setting
Parameters for adjusting the load-dependent motor
settings.
1-60 Low Speed Load Compensation
Range: Function:
100 % [0 - Enter the low-speed voltage compensation
*
300 %] value in percent. This parameter is used for
optimising the low-speed load performance.
This parameter is only active if
parameter 1-10 Motor Construction = [0]
Asynchron.
1-61 High Speed Load Compensation
Range: Function:
100 % [0 - Enter the high-speed load voltage compen-
*
300 %] sation value in percent. This parameter is
used for optimising the high-speed load
performance. This parameter is only active if
parameter 1-10 Motor Construction = [0]
Asynchron.
1-62 Slip Compensation
Range: Function:
Size [ -400 - Enter the % value for slip compensation
related 399.0 %] to compensate for tolerance in the
*
value of n
calculated automatically, that is, based
on the nominal motor speed n
1-63 Slip Compensation Time Constant
Range: Function:
0.1 s [0.05 - 5 s] 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 occur, use a
longer time setting.
MG06C602
Programming Guide
1-56
1-56 1-56 1-56 1-56
[5]
[1] [2] [3] [4]
Output Frequency
Par 1-56 [x]
. Slip compensation is
M,N
.
M,N
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1-64 Resonance Dampening
Range: Function:
100 [0 - Enter the resonance dampening value. Set
% 500 %] 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.
1-65 Resonance Dampening Time Constant
Range: Function:
0.005 s [ 0.001 - Set parameter 1-64 Resonance Dampening
*
0.05 s] and parameter 1-65 Resonance Dampening
Time Constant to help eliminate high-
frequency resonance problems. Enter the
time constant that provides the best
dampening.
1-66 Min. Current at Low Speed
Range: Function:
50 % [ 0 - Enter the minimum motor current at low speed,
120 %] see parameter 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 parameter 1-00 Configuration Mode
[0] Speed open loop only. The frequency converter
runs with constant current through motor for
speeds below 10 Hz.
Parameter 4-16 Torque Limit Motor Mode and/or
parameter 4-17 Torque Limit Generator Mode
automatically 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 magnetising current.
Example: Set parameter 4-16 Torque Limit Motor
Mode to 100% and set parameter 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.
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