Danfoss VLT Series Programming Manual page 45

Parameter Description
1-61 High Speed Load Compensation
Range:
100 % [0 - 300
*
%]
3 3
NOTE
1-61 High Speed Load Compensation will not have effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
1-62 Slip Compensation
Range:
0 % [-500 - 500
*
%]
NOTE
1-62 Slip Compensation will not have effect when
1-10 Motor Construction = [1] PM, non salient SPM.
1-63 Slip Compensation Time Constant
Range:
Size related
*
s]
NOTE
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 % [0 - 500
*
%]
44
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 ameter is
active.
Motor size [kW] Change-over [Hz]
0.25-7.5 > 10
11-45 < 5
55-550 < 3-4
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
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.
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.
MG.11.CC.02 - VLT
®
VLT HVAC Drive Programming Guide
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:
Size related
3.3.7 1-7* Start Adjustments
1-71 Start Delay
Range:
0.0 s
*
1-72 Start Function
Option:
[0] DC Hold/
Motor
Preheat
[2] Coast
*
®
is a registered Danfoss trademark
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.
Increasing this current improves
developed motor torque at low speed.
Low speed is here defined as speeds
below 6% of the Nominal Speed of
Motor (1-25 Motor Nominal Speed) in
VVC plus PM Control
Function:
[0.0 - 120.0 s] The function selected in 1-80 Function at
Stop is active in the delay period.
Enter the time delay required before
commencing acceleration.
Function:
Select the start function during start delay.
This parameter is linked to 1-71 Start Delay.
Energizes motor with a DC holding current
(2-00 DC Hold/Preheat Current) during the start
delay time.
Releases shaft coasted converter during the
start delay time (inverter off).
Available selections depend on 1-10 Motor
Construction:
[0] Asynchron:
[2] coast
[0] DC-hold
[1] PM non salient: