Lenze 8200 motec frequency inverter 0.25kW-7.5kW - Manual (Page 76)

Function library
Selection of control mode, optimisation of operating behaviour
7−5
L
EDB82MV752 EN 5.2
Setting the V/f characteristic
Under C0014 select the V/f characteristic suitable for your application.
)
Note!
The following must be observed when operating drives with square−law V/f
characteristic:
l High moments of inertia reduce the acceleration of the drive.
l This drive behaviour can be avoided by using the linear V/f characteristic via the
parameter set changeover during the acceleration.
Setting of V/f rated frequency 10
The V/f rated frequency determines the slope of the V/f characteristic and has considerable
influence on the current, torque and power performance of the motor.
·
The setting under C0015 applies to all admitted mains voltages.
·
The internal mains voltage compensation compensates deviations in the mains during
operation. Therefore, they do not have to be considered for the setting of C0015.
·
Depending on the settings under C0015 it can be necessary to adapt the maximum output
frequency under C0011 to ensure that the entire speed range will be used.
·
The V/f rated frequency depends on the rated controller voltage, the rated motor voltage, and
the rated motor frequency:
C0015 [Hz] +
U [V]
U
r
[V]
@ f
r
[Hz]
V 400 V for E82xVxxxK4C types
V 230 V for E82xVxxxK2C types
V
r
Rated motor voltage depending on type of connection, see nameplate
f
r
Rated motor frequency according to nameplate
)
Note!
The identification of the motor parameters calculates C0015 and automatically
saves the value.