For speeds above 10 Hz, the motor flux model in the frequency converter controls the motor. Par. 4-16
Torque
Limit Motor Mode
and / or par. 4-17
Torque Limit Generator Mode
automatically adjust par. 1-66. The parameter
with the highest value adjusts par. 1-66. The current setting in par. 1-66 is composed of the torque generating
current and the magnetizing current.
Example: Set par. 4-16
Torque Limit for Motor Mode
to 100% and set par. 4-17
Torque Limit for Generating
Mode
to 60%. Par. 1-66 automatically adjusts to about 127%, depending on the motor size.
This parameter is available for FC 302 only.
1-67 Load Type
Option:
Function:
[0]
*
Passive load
For conveyers, fan and pump applications.
[1]
Active Load
For hoisting applications. When
Active Load
[1] is selected, set par. 1-66 Min. Current at Low Speed to a level
which corresponds to maximum torque.
This parameter is available for FC 302 only.
1-68 Minimum Inertia
Range:
Function:
0.0048
*
[0.0001 - Par. 1-69]
Enter the minimum moment of inertia of the mechanical system. Par. 1-68 and par. 1-69
Maximum Inertia
are
used for pre-adjustment of the Proportional Gain in the speed control, see par. 7-02
Speed PID Proportional
Gain
.
This parameter is available for FC 302 only.
This parameter cannot be adjusted while motor is running.
1-69 Maximum Inertia
Range:
Function:
0.0048
*
[0 - 0.4800]
Enter the maximum moment of inertia of the mechanical system. Par. 1-68
Minimum Inertia
and par. 1-69 are
used for pre-adjustment of the Proportional Gain in the speed control, see par. 7-02
Speed PID Proportional
Gain
.
This parameter is available for FC 302 only.
This parameter cannot be adjusted while motor is running.
2.4.7. 1-7* Start Adjustments
Parameters for setting special motor start features.
1-71 Start Delay
Range:
Function:
0.0s
*
[0.0 - 10.0 s]
This parameter refers to the start function selected in par. 1-72
Start Function
.
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 par. 1-71
Start Delay
.
[0]
DC hold/ delay time
Energizes motor with a DC holding current (par. 2-00) during the start delay time.
[1]
DC Brake/delay time
Energizes motor with a DC braking current (par. 2-01) during the start delay time.
[2]
*
Coast/delay time
Releases shaft coasted converter during the start delay time (inverter off).
[3]
Start speed/ current
clockwise operation
Only possible with VVC+.
Connect the function described in par. 1-74
Start Speed (RPM)
and par. 1-76
Start Current
in the start delay
time.
Regardless of the value applied by the reference signal, the output speed applies the setting of the start speed
in par. 1-74 or par. 1-75 and the output current corresponds to the setting of the start current in par. 1-76
Start
2. How to Programme
FC 300 Programming Guide
48
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
2
