Danfoss VLT AutomationDrive FC 300 Series Programming Manual page 43

Parameter Descriptions
U
m
Par.1-60
100%
3 3
60%
0%
Illustration 3.11
1-61 High Speed Load Compensation
Range:
100 % [0 - 300
*
%]
Motor size
0.25 kW - 7.5 kW
Table 3.6
1-62 Slip Compensation
Range:
Size [-500 -
related 500 %]
*
1-63 Slip Compensation Time Constant
Range:
Size related
*
s]
42
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.
Change-over
> 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 Configuration 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.
Function:
[0.05 - 5.00 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.
MG33ME02 - VLT
®
VLT AutomationDrive Programmming Guide
NOTE
Par.1-61
1-63 Slip Compensation Time Constant will not have effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
1-64 Resonance Dampening
Range:
100 %
*
f
out
NOTE
1-64 Resonance Dampening will not have effect when
1-10 Motor Construction = [1] PM, non salient SPM.
1-65 Resonance Dampening Time Constant
Range:
5 ms
*
NOTE
1-65 Resonance Dampening Time Constant will not have
effect when 1-10 Motor Construction = [1] PM, non salient
SPM.
1-66 Min. Current at Low Speed
Range:
100
%
*
®
is a registered Danfoss trademark
Function:
[0 - 500 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:
[5 - 50 ms] 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. - 200. %] 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 10æHz.
For speeds above 10æHz, the motor flux
model in the frequency converter
controls the motor. 4-16 Torque Limit
Motor Mode andæ/æor 4-17 Torque Limit
Generator Mode automatically adjust
1-66 Min. Current at Low Speed. The
parameter with the highest value adjusts
1-66 Min. Current at Low Speed. The
current setting in 1-66 Min. Current at
Low Speed is composed of the torque
generating current and the magnetizing
current.