Lenze E84AVHC Series - 5.4.2.1 Adapting the V;f base frequency

Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010 L 117
8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
V/f characteristic control (VFCplus)
5.4.2.1 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:
[5-5] Calculation of the V/f base frequency
Typical values of the V/f base frequency
U
FU
: Mains voltage 400 V or 230 V
U
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⋅=
Drive controller 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
Drive controller 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
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