6 defining a user-defined v/f characteristic, Defining a user-defined v/f characteristic, Defining a user – Lenze 8400 User Manual
Page 162: Defined v/f characteristic, 5motor control (mctrl)
5
Motor control (MCTRL)
5.4
V/f characteristic control (VFCplus)
162
Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.4.3.6
Defining a user-defined V/f characteristic
For individual adaptation of the motor magnetisation to the actual application, the motor control
"10: VFCplus: V/f definable" with a freely definable characteristic can be selected in
as an
alternative if the linear and quadratic characteristics are not suitable.
• The 11 grid points (voltage/frequency values) of the characteristic are selected via the 11
subcodes of
and
.
• It is necessary to set all 11 grid points by means of corresponding subcodes.
• If fewer grid points (voltage/frequency values) are needed, this can be achieved indirectly by
ascribing the same voltage and frequency values to consecutive grid points.
Example: C00967/3 = C00967/4 and C00968/3 = C00968/4
• The grid points can be specified in any sequence. Internally, they are automatically ordered
from the minimum to the maximum frequency value.
• Above the maximum and below the minimum frequency, the previous rise is continued until
the maximum output voltage.
• In the Lenze setting, the 11 grid points represent a linear characteristic.
• 3-phase devices: Output voltage 400 V at f = 50 Hz
• 1-phase devices: Output voltage 230 V at f = 50 Hz
[5-7]
Freely definable characteristic (Lenze setting for 3-phase devices)
Note!
The V/f base frequency (
) and the V
min
boost (
) no longer exert an
influence if this motor control is chosen.
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
V
400 V
320 V
240 V
160 V
80 V
0 V
80 V
160 V
240 V
320 V
400 V
f
-50 Hz
-40 Hz
-30 Hz
-20 Hz
-10 Hz
0 Hz
10 Hz
20 Hz
30 Hz
40 Hz
50 Hz
U [V]
160
0
f [Hz]
240
320
400
10
20
30
40
50
-50
-40
-30
-20
-10
80
C00967/1
C00968/1
C00967/2
C00968/2
C00967/3
C00968/3
C00967/11
C00968/11
P1
P2
P3
P4
P5
P7
P6
P8
P9
P10
P11