Technical description 8100_A
33
7.2.2 ACCLERATIONTIMETIR C012
DECELERATIONTIME TIF C013
Acceleration and deceleration refer to a change of the field frequency from zero to
fdmax.
The times Tir and Tif can be calculated as folIows:
fdmax
Here, tir and tif are the desired times for the change between fd1 and fd2 and Tir
and Tif the values to be set under C012, C013.
7.2.3 VIf CHARACTERISTIC
A linear or square motor voltage characteristic can be set under C014. Square
characteristics are preferably used for pump and biower drives.
7.2.4 VIf NOMINALFREQUENCYfdN
The slope of the VIf characteristic is set using the VIf nominal frequency. It is
calculated from the rated motor voltage and the rated motor frequency as folio
ws:
230 V
fdN [HZ]
. fN Motor [Hz]
UN Motor [V]
The settings of the VIf nominal frequency for the most common mains and motor
combinations can be obtained from the table below. Please note that the maximum
output voltage of the inverter can only be as high as the mains supply voltage.
Lenze
fd 1Hz
fdmax
.-.,," I !"'.- Tir = tir
fd 2
fdl
0
Tif = tif
UNMotor fNMotor fdN
[V] [Hz] [Hz]
230 50
50.0
220
50
52.3
230 60 60.0
240 50
47.9
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