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
NB!
For par. 1-56 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.
AF-60 LP™ Micro Drive Programming Guide
18
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