Operating mode
V/f char acteristic control
10
Function library
10.3
10.3.1
L
10.3-5
EDS82EV903-1.0-11/2002
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.
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.
l The setting under C0015 applies to all admitted mains voltages.
l 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.
l 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.
l The V/f rated frequency depends on the rated controller voltage, the rated
motor voltage, and the rated motor frequency:
V 400 V for E82xVxxxK4C types
V 230 V for E82xVxxxK2C types
C0015 [Hz] =
U[
]
U
r
[V]
⋅ f
r
[Hz] 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.
Setting the V/f characteristic
Setting of V/f rated frequency 42
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