1-52 Min. Speed Normal Magnetizing [Hz]
Range:
Function:
Use this parameter along with
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,
1-50
Motor Magnetizing at Zero Speed
is
inactive.
Magn. current
130BD016.10
Hz
Par.1-50
Par.1-51
100%
Par.1-52
RPM
Illustration 4.2
1-55 U/f Characteristic - U
Range:
Function:
This parameter is an array parameter [0-5]
and is only functional when
1-01 Motor
Control Principle
is set to
[0] U/f
.
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
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
1-01 Motor
Control Principle
is set to
[0] U/f
.
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
1-55 U/f
Characteristic - U
.
Make a U/f characteristic based on 6
definable voltages and frequencies, see
Illustration 4.3
.
Simplify U/f characteristics by merging 2
or more points (voltages and frequencies),
respectively, are set equal.
Motor Voltage
Par 1-55 [x]
Output Frequency
Par 1-56 [x]
1-55[5]
1-55[4]
1-55[3]
1-55[2]
1-55[1]
1-55[0]
1-56
[0]
1-56
[1]
1-56
[2]
1-56
[3]
1-56
[4]
1-56
[5]
130BD017.10
Illustration 4.3 U/f Characteristics
NOTE
For
1-56 U/f characteristics - F
the following applies
[0]
≦
[1]
≦
[2]
≦
[3]
≦
[4]
≦
[5]
4.2.4 1-6* Load Dependent Setting
Parameters for adjusting the load-dependent motor
settings.
1-60 Low Speed Load Compensation
Range:
Function:
Use this parameter to gain optimum U/f
characteristic when running at low speed.
100 %
*
[0-199 %] Enter percentage in relation to load when
motor runs at low speed.
Change-over point is automatically
calculated based on motor size.
130BD018.10
60%
0%
100%
U
m
Changeover
f
out
Par.1-60
Par.1-61
Illustration 4.4
Parameter Descriptions
VLT
®
Micro Drive FC 51 Programming Guide
16
MG02C602 - VLT
®
is a registered Danfoss trademark
4
4