1-66 Min. Current at Low Speed
Range:
Function:
and/or
parameter 4-17 Torque Limit Generator
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 magnetizing current.
Example: Set
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.
1-67 Load Type
This parameter is valid for FC 302 only.
Option:
Function:
[0]
*
Passive load For conveyors, fan, and pump applications.
[1]
Active load For hoisting applications. This option allows
the frequency converter to ramp up at 0 RPM.
When
[1] Active Load
is selected, set
parameter 1-66 Min. Current at Low Speed
to a
level which corresponds to maximum torque.
1-68 Motor Inertia
Range:
Function:
0 kgm²
*
[0.0000 -
10000.0000
kgm²]
Enter the motor inertia to obtain an
improved torque readout and
therefore a better estimate of the
mechanical torque on the shaft.
Available in flux control principle
only.
1-69 System Inertia
Range:
Function:
Size
related
*
[0000 -
10000.0000
kgm²]
NOTICE
Valid for FC 302 only.
This parameter cannot be
adjusted while motor is running.
The system inertia and parameter 7-08
Speed PID Feed Forward Factor is used
to calculate acceleration feed forward
for the speed PID controller.
NOTICE
Valid for software version 48.3X
only.
Automatic measurement of system
inertia and setting of this parameter is
activated by setting the parameter to 0.
1-69 System Inertia
Range:
Function:
System inertia is calculated after first
running cycle with sufficient data and
the parameter is automatically set after
stop.
The function is only active when
parameter 1-01 Motor Control Principle
is
set to
[2] Flux Sensorless
or
[3] Flux w/
motor feedb
.
Acceleration to at least model shift
frequency (
) + 10Hz and decelerate to
produce a result. Measurement is
possible in both Speed, Position, or
Synchronization mode.
3.2.11 1-7* Start Adjustments
1-70 Start Mode
Select the start-up mode. This is done to initialize the VVC
+
control core for previously free-running motor. Both selections
estimate the speed and angle. Active for PM and SynRM motors
in VVC
+
only.
Option:
Function:
[0]
*
Rotor Detection
Estimates the electrical angle of the
rotor and uses this as a starting point.
Standard selection for VLT
®
AutomationDrive applications.
[1]
Parking
The parking function applies DC current
across the stator winding and rotates
the rotor to electrical 0 position
(typically selected for HVAC
applications). Parking current and time
are configured in
parameter 2-06 Parking
Current
and
.
[2]
Rotor Det. w/
Parking
1-71 Start Delay
Range:
Function:
0 s
*
[0 - 25.5 s] This parameter refers to the start function
selected in
Enter the time delay required before
commencing acceleration.
1-72 Start Function
Option:
Function:
Select the start function during start delay.
This parameter is linked to
.
Parameter Descriptions
VLT
®
AutomationDrive FC 301/302
58
Danfoss A/S © 10/2018 All rights reserved.
MG33MP02
3
3
Summary of Contents for VLT AutomationDrive FC 302
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