Vacon 20 SERIES, Applications Manual

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vacon • 49 Parameter description
3
2: programmable
The U/f curve can be programmed with three different points: Zero frequency voltage (P1),
Midpoint voltage/frequency (P2) and Field weakening point (P3).
Programmable U/f curve can be used if more torque is needed at low frequencies. The optimal
settings can automatically be achieved with Motor identification run.
Note : motor identification automatically sets this parameter to 2.
Figure 7. Programmable curve.
P9.4 U/
F MID POINT FREQUENCY
Enabled if P9.3= 2.
Note : motor identification automatically sets this parameter.
P9.5 U/
F MID POINT VOLTAGE
Enabled if P9.3= 2.
Note : motor identification automatically sets this parameter.
P9.6 V
OLTAGE AT
F0
Motor voltage at frequency zero.
Note : motor identification automatically sets this parameter.
P9.7 R
S VOLTAGE DROP
Voltage drop on stator windings, at motor nominal current, defined as % of nominal voltage.
Value affects motor torque estimation, slip compensation and voltage boost.
U[V]
f[Hz]
P2
P3
P1
Default: Nominal
voltage of the motor
Linear
Field
weakening
point
Default:
Nominal frequency
of the motor