Lenze 8400 - Adapting the VF Base Frequency

5 Motor control (MCTRL)
5.4 V/f characteristic control (VFCplus)
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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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5.4.3.1 Adapting the V/f base frequency
The V/f base frequency (C00015) determines the slope of the V/f characteristic and has
considerable influence on the current, torque, and power performance of the motor.
• The setting in C00015
applies to all permitted mains voltages.
• Mains fluctuations or fluctuations of the DC-bus voltage (operation in generator mode) do not
need to be considered when the V/f base frequency is set. They are automatically compensated
for by the internal mains voltage compensation of the device.
• Depending on the setting in C00015
, it may be required to adapt the reference speed (C00011)
to traverse the entire speed range of the motor.
• The V/f base frequency is automatically calculated from the stored motor nameplate data by
the motor parameter identification:
[5-4] Calculation of the V/f base frequency
Typical values of the V/f base frequency
V
FI
: Mains voltage 400 V or 230 V
V
ratedmot
: Rated motor voltage depending on the connection method
f
rated
: Rated motor frequency
C00015 [Hz]
U
FI
[V]
U
Ratedmot
[V]
----------------------------------
f
Rated
Hz⋅=
Inverter with 400-V mains connection
Motor voltage [V] Motor frequency [Hz] Motor connection V/f base frequency
(C00015)
230 / 400 50  50 Hz
220 / 380 50  52.6 Hz
280 / 480 60  50 Hz
400 / 690
400
50
50
 50 Hz
230 / 400
280 / 480
400
50
60
87
 87 Hz
220 / 380 50  90.9 Hz
Inverter with 230-V mains connection
Motor voltage [V] Motor frequency [Hz] Motor connection V/f base frequency
(C00015)
230 50  50 Hz
220 / 380 50  52.3 Hz