4.2.3. 1-5* Load Independent Setting
This parameter group is for setting the load independent motor settings.
1-50 Motor Magnetization at Zero Speed
Range: Function:
This parameter enables different thermal load on motor when running at low speed.
100 %
*
[ 0 - 300%]
Enter a percentage of rated magnetizing current. If setting is too low, motor shaft torque may be reduced.
1-52 Min. Speed Normal Magnetizing [Hz]
Range: Function:
Use this parameter along with par. 1-50,
Motor Magnetizing at Zero Speed
.
0.0 Hz
*
[0.0 - 10.0 Hz]
Set frequency required for normal magnetizing current. If frequency is set lower than motor slip frequency, par.
1-50,
Motor Magnetizing at Zero Speed
is inactive.
1-55 U/f Characteristic - U
Range: Function:
This parameter is an array parameter [0-5] and is only functional when par. 1-01,
Motor Control Principle
is set
to
U/f
[0].
0.0 V
*
[0.0 - 999.9 V]
Enter voltage at each frequency point to manually form a U/f characteristic matching motor. Frequency points
are defined in par. 1-56,
U/f characteristics - F
.
1-56 U/f Characteristic - F
Range: Function:
This parameter is an array parameter [0-5] and is only functional when par. 1-01,
Motor Control Principle
is set
to
U/f
[0].
0.0 Hz
*
[0.0 - 1000.0 Hz]
Enter frequency points to manually form a U/f characteristic matching motor. Voltage at each point is defined
in par. 1-55,
U/f Characteristic - U
.
Make a U/f characteristic based on 6 definable voltages and frequencies, see below figure.
Simplify U/f characteristics by merging 2 or more points (voltages and frequencies), respectively, are set equal.
Illustration 4.1: Fig. 1 U/f characteristics
4. Parameter Descriptions VLT
p
Micro Drive FC 51
18
MG.02.C4.02 - VLT
p
is a registered Danfoss trademark
4
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