Lenze 8240 HVAC Series - Manual (Page 46)

Commissioning
5-6 UOOuhäáã~_^NMMO
5.4 Optimisation of the operating characteristic of the
drive
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5.4.1 Select the control mode
Code Name Possible settings
Lenze
Selection Info
C014 ¿ Operating mode -4- -2- Linear characteristic V~f
d
with constant V
min
boost.
-3- Square characteristic V~f
d
2 with constant
V
min
boost
-4- Motor-current control
Control modes of the
voltage
characteristic
Function
D
Under C014 you can set the control mode and the voltage characteristic.
D
The V/f-characteristic control with auto boost enables a low-loss operation of single drives with
standard three-phase AC motors with load-dependent V
min
boost.
D
The motor-current control enables a ”Sensorless Speed Control”. Compared with the V/f
characteristic control, the drive can operate with a considerable higher torque and consumes less
current during idle running.
C014 = -2-
Linear characteristic C014 = -3-
Square-law characteristic (e. g. for pumps, fans)
hPRKMMSRd_
1 0 0 %
0
0 1
f d
f d N
V m i n
0
0 1
f d
f d N
V m i n
V o u t
1 0 0 %
V o u t
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