Lenze 8200 Frequency inverters - Manual (Page 111)

Commissioning
8200SHB0199 5-6
5.4 Optimisation of the operating behaviour
The following settings are used to determine the current and torque behaviour as
well as the performance of the connected motor.
Choose between the control modes ”Motor current control” and
”V/f-characteristic control”. Information to help you with the selection can be
obtained from chapter 5.4.1.
5.4.1 Select control mode
Code Name Possible settings IMPORTANT
Lenze Choice Info
C014 ¤ Control mode Control modes
of the voltage
characteristic
820X -0- -0- Linear characteristic V f
d
with
auto boost
-1- Square characteristic V f
d
2 with
auto boost
-2- Linear characteristic V f
d
with
constant V
min
boost
-3- Square characteristic V f
d
2 with
constant V
min
boost
821X/822X/
824X
-4- -4- Motor-current control
Function - Under C014 you can set the control mode and the voltage characteristic.
- The V/f-characteristic control with auto boost enables a low-loss operation of stand-alone drives
with standard three-phase AC motors with load-dependent V
min
boost.
- The motor-current control enables a ”Sensorless Speed Control”. Compared to the
V/f-characteristic control, the drive can operate with a considerably higher torque and less current
consumption during idle running.
C014 = -2-
Linear characteristic C014 = -3-
Square characteristic (e.g. for pumps, fans)
1 0 0 %
0
0 1
f d
f d r
m i n
0
0 1
f d
f d r
m i n
1 0 0 %
V
V
V o u t V o u t
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