Danfoss VLT AQUA Drive FC 202 Programming Manual page 48

Parameter Description
Start the motor at nominal speed. If the application does
not run well, check the VVC
contains recommendations for various applications.
Application
Low-inertia applications
3 3
I /I <5
Load Motor
Low-inertia applications
50>I /I >5
Load Motor
High-inertia applications
I /I >50
Load Motor
High load at low speed
<30% (rated speed)
Table 3.5 Recommendations for Various Applications
If the motor starts oscillating at a certain speed, increase
parameter 1-14 Damping Gain. Increase the value in small
steps. Depending on the motor, this parameter can be set
to 10–100% higher than the default value.
3.3.6 1-1* VVC
The default control parameters for VVC
are optimized for applications and inertia load in range of
50>Jl/Jm>5. Jl is load inertia from the application and Jm
is machine inertia.
For low-inertia applications (Jl/Jm<5), increase
parameter 1-17 Voltage filter time const. with a factor of 5–
10 and sometimes parameter 1-14 Damping Gain to
improve performance and stability.
For high-inertia applications (Jl/Jm>50) increase
parameter 1-15 Low Speed Filter Time Const.,
parameter 1-16 High Speed Filter Time Const., and
parameter 1-14 Damping Gain to improve performance and
stability.
For high load at low speed (<30% of rated speed), increase
parameter 1-17 Voltage filter time const. due to non-linearity
in the inverter at low speed.
46
®
VLT
+
SynRM settings. Table 3.5
Settings
Increase parameter 1-17 Voltage filter
time const. by factor 5–10.
Reduce parameter 1-14 Damping
Gain.
Reduce parameter 1-66 Min. Current
at Low Speed (<100%).
Keep the default values.
Increase parameter 1-14 Damping
Gain, parameter 1-15 Low Speed Filter
Time Const., and parameter 1-16 High
Speed Filter Time Const.
Increase parameter 1-17 Voltage filter
time const.
Increase parameter 1-66 Min. Current
at Low Speed to adjust the starting
torque. 100% current provides
nominal torque as starting torque.
Working at a current level higher
than 100% for a prolonged time can
cause the motor to overheat.
+
PM/SynRM
+
PMSM control core
Danfoss A/S © 05/2018 All rights reserved.
AQUA Drive FC 202
1-11 Motor Model
Option:
[1] Std.
Asynchron
[2] Std. PM, non
salient
[10] Danfoss OGD
LA10
[11] Danfoss OGD
V210
1-14 Damping Gain
Range:
Size [0 -
related 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]
*
Function:
Automatically sets the factory values for the
selected motor. If the default value Std.
Asynchron is used, determine settings
manually according to the selection
parameter 1-10 Motor Construction.
Default motor model when [0] Asynchron is
selected in parameter 1-10 Motor Construction.
Selectable when [1] PM, non-salient SPM is
selected in parameter 1-10 Motor Construction.
Selectable when [1] PM, non-salient SPM is
selected in parameter 1-10 Motor Construction.
Only available for T4, T5 in 1.5–3 kW. Settings
are loaded automatically for this specific
motor.
Selectable when [1] PM, non-salient SPM is
selected in parameter 1-10 Motor Construction.
Only available for T4, T5 in 0.75–3 kW.
Settings are loaded automatically for this
specific motor.
Function:
The parameter stabilizes the PM motor so it
runs smoothly and with stability. 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. If the damping gain is too high
or low, the control becomes unstable. The
resulting dynamic performance is related to
the machine data and load type.
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 low, the control
becomes 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 low, the control
becomes unstable. This time constant is
used above 10% rated speed.
MG20OB02