Danfoss VLT Micro Drive FC 51 Programming Guide

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
44
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Danfoss VLT Micro Drive FC 51 Specifications

General

Enclosure	IP20
Output Voltage	0-100% of supply voltage
Altitude	Up to 1000 m without derating
Power Range	0.18-22 kW
Control Method	V/f
Communication	Modbus RTU
Protection Features	Over-voltage, under-voltage, over-current, over-temperature
Ambient Temperature	-10°C to 50°C
Storage Temperature	-25°C to 65°C
Relative Humidity	5-95% (non-condensing)
Input Voltage	200-240 V, 380-480 V
Braking Function	Integrated braking chopper (optional)