3
ANTRIEBSTECHNIK
6
53
KEB COMBIVERT F4-C
Name: Basis
28.01.98
6
© KEB Antriebstechnik, 1997
All Right reserved
Adjustment U/f-Characteristic Functional Description
Section
Page
Date
Chapter
U
A
f
out
uF.1
100%
uF.0
uF.2 = 0,0...409,5875 Hz; Default = 0 Hz
uF.3 = 0,0...100 %; Default = 0 %
6.5 Voltage-/
Frequency
Characteristic
Picture 6.5.2 Rated point and Boost
6.5.2 Rated Point (uF.0)
and Boost (uF.1)
This chapter describes all parameters for the adjustment of the voltage/frequency
characteristic as well as the appropriate adjustments like modulation, voltage gain
(Boost) and operating frequency.
The voltage/frequency characteristic (V/f) is adjusted through the rated point (uF.0)
and the Boost (uF.1). The rated point adjusts the frequency at which the maximum
output voltage is reached. The Boost adjusts the output voltage at 0 Hz (see picture
6.5.2).
uF.0 = 0,0...409,5875 Hz; Default = 50 Hz
uF.1 = 0,0...25,5 %; Default = 2,0 %
6.5.3 Additional Rated
Point (uF.2/uF.3)
6.5.1 Maximal Frequency
Mode (ud.11)
With this parameter the maximum possible output frequency and the frequency
resolution are specified. Changes affect all frequency-dependent parameters. The
setting range is defined by the power circuit. Changes of this parameter become
active after a Power-on Reset.
ud.11 Maximal Frequency Resolution
0 (standard) 409,5875 Hz 0,0125 Hz
1 819,18 Hz 0,025 Hz
2 * 1638,3 Hz 0,05 Hz
* At the adjustment in COMBIVIS all frequency-dependent parameters must be
multiplied with 4 since the same Config.-File is used.
To adapt the U/f-characteristic to special conditions an additional point of support
can be specified with uF.2 and uF.3. uF.2 defines the frequency and uF.3 the voltage.
At uF.2 = 0 Hz the adjustment is ignored.
U
A
f
out
uF.1
100%
uF.0
uF.3
uF.2
Picture 6.5.3 Additional rated point
The operating frequency
(uF.11) must be adjusted at
least 10 times higher than the
maximal permissible output
frequency!
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