Danfoss VLT DriveMotor FCP 106 Programming Manual page 42

Parameters
4.2.3 1-14 to 1-17 VVC
The default control parameters for VVC
control core are optimised for HVAC applications and
inertia load in range of 50>Jl/Jm>5, were Jl is load inertia
from the application and jm is machine inertia.
For low inertia applications Jl/Jm<5 it is recommended
that 1-17 Voltage filter time const. is increased with a factor
4 4
of 5-10 and in some cases 1-14 Damping Gain should also
be reduced to improve performance and stability.
For high inertia applications Jl/Jm>50 it is recommended
that 1-15 Low Speed Filter Time Const., 1-16 High Speed Filter
Time Const. and1-14 Damping Gain are increased to
improve performance and stability.
For high load at low speed [<30% of rated speed] it is
recommended that 1-17 Voltage filter time const. is
increased due to nonlinearity in the inverter at low speed.
1-14 Damping Gain
Range:
120 [ 0 -
% 250 %]
*
1-15 Low Speed Filter Time Const
Range:
Size
related 20 s]
*
1-16 High Speed Filter Time Const
Range:
Size
related 20 s]
*
1-17 Voltage filter time const
Range:
Size
related s]
*
40
plus
PM
plus
PM motor
Function:
The parameter stabilises the PM motor to ensure
smooth and stable operation. The value of
damping gain controls the dynamic performance
of the PM motor. Low damping gain results in
high dynamic performance and a high value
results in a low dynamic performance. The
dynamic performance is related to the motor data
and load type. If the damping gain is too high or
low, the control becomes unstable.
Function:
[ 0.01 - High pass-filter damping time constant
determines the response time to load
steps. Obtain quick control through a
short damping time constant. However,
if this value is too short, the control
gets unstable. This time constant is
used below 10% rated speed.
Function:
[ 0.01 - High pass-filter damping time constant
determines the response time to load
steps. Obtain quick control through a
short damping time constant. However,
if this value is too short, the control
gets unstable. This time constant is
used above 10% rated speed.
Function:
[ 0.01 - 1 Machine Supply Voltage Filter Time
constant is used for reducing the
influence of high frequency ripples and
system resonances in the calculation of
®
VLT DriveMotor FCP 106 and FCM 106 Programming Guide
1-17 Voltage filter time const
Range:
4.2.4 1-2* Motor Data
This parameter group comprises input data from the
nameplate on the connected motor.
NOTICE
Changing the value of these parameters affects the
setting of other parameters.
1-20 Motor Power
Enter the nominal motor power in kW/hp according to the motor
nameplate data. The default value corresponds to the nominal
rated output of the unit.
This parameter cannot be adjusted while the motor is running.
Option:
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
1-22 Motor Voltage
Range:
Size
related
*
MG03N102 - Rev. 2013-12-02
Function:
machine supply voltage. Without this
filter, the ripples in the currents can
distort the calculated voltage and affects
the stability of the system.
0.18 kW - 0.25 hp
0.25 kW - 0.33 hp
0.37 kW - 0.5 hp
0.55 kW - 0.75 hp
0.75 kW - 1 hp
1.1 kW - 1 hp
1.5 kW - 2 hp
2.2 kW - 3 hp
3 kW - 4 hp
3.7 kW - 5 hp
4 kW - 5.4 hp
5.5 kW - 7.5 hp
7.5 kW - 10 hp
11 kW - 15 hp
15 kW - 20 hp
18.5 kW - 25 hp
22 kW - 30 hp
30 kW - 40 hp
Function:
[ 50.0 - Enter the nominal motor voltage
1000.0 V] according to the motor nameplate
data. The default value corresponds
to the nominal rated output of the
unit.
Function: