6
5
3
KEB COMBIVERT F5
Name: Basis
04.05.04
6
Section
Page
Date
©
KEB Antriebstechnik, 2002
All rights reserved
Chapter
Functional Description
U/f-Characteristic Adjustment
6.5
Voltage-/
Frequency
Characteristic
Adjustment
In the following chapter all parameters for the adjustment of the voltage/frequency
characteristic as well as the appropriate adjustments like modulation, voltage rise
(Boost) and switching frequency are described. Except for the switching frequency
these adjustments apply only to F5-B, F5-G and F5-M in controlled operation (CS.0=off).
6.5.1
Control Type
(ud.2) and Max
Frequency Mode
(only F5-B)
This parameter depends in the value range on the used control. The values 0...2 apply
to open loop systems (F5-B and F5-G), the values 4...6 to closed loop systems (F5-
M) and the values 7...10 to servos (F5-S). For these units a separate instruction
manual is available, for that reason we do not go into details here.
This parameter defines the maximal possible output frequency/speed, the resolution
and the reference values for the ramp times, the analog outputs and the dc brake.
Changes effect all frequency/speed dependent parameters. The parameter can only
be written with opened control release. After a change the initialization is passed
through, so that no Power-On-Reset is necessary.
ud.2
Control typ
Maximal frequency
Resolution
0
F5-C/G/B
400 Hz
0,0125 Hz
1
F5-C/G/B
800 Hz
0,025 Hz
2
F5-C/G/B
1600 Hz
0,05 Hz
3
F5-G
50 Hz
1,56 mHz
4
F5-M
4000 min
-1
0,125 min
-1
5
F5-M
8000 min
-1
0,25 min
-1
6
F5-M
16000 min
-1
0,5 min
-1
7
F5-M
500 min
-1
0,0156 min
-1
8
F5-S
4000 min
-1
0,125 min
-1
9
F5-S
8000 min
-1
0,25 min
-1
10
F5-S
16000 min
-1
0,5 min
-1
11
F5-S
500 min
-1
0,0156 min
-1
For every frequency mode COMBIVIS uses an own Config-File. In the case of a mode
changeover all parameter information are read from the inverter and a new Config-File
is generated should it not already exist.
The switching frequency
(uF.11) must be adjusted at
least 10times higher than the
maximal possible output
frequency!
For applications with maximum torque with small output frequency a new mode was
introduced.
Special characteristics at High-Torque-Modus:
• default of torque in steps 1 Nm; the display is in in 0,01 Nm
• default of the rated speed /-frequency in 0,125 min
-1
/ 0,0125 Hz.
• the EMK constant for synchronous motors can be default up to 32 kV / 1000 min
-1
,
that means rated speeds of the motors up to 12,5 min
-1
.
High-Torque-Modus
