16 v/f control – Watson-Marlow MM440 User Manual
Page 111
Issue 10/06
3 Functions
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
111
3.5.7.16 V/f
control
P1300 =...
Control mode
The control type is selected using this parameter. For the "V/f characteristic" control type,
the ratio between the frequency inverter output voltage and the frequency inverter output
frequency is defined.
0 V/f with linear
1 V/f with FCC
2 V/f with parabolic characteristic
3 V/f with programmable characteristic (
→ P1320 – P1325)
P1310 =...
Continuous boost
(entered in %)
Voltage boost as a % relative to P0305 (rated motor current) and P0350 (stator resistance).
P1310 is valid for all V/f versions (refer to P1300). At low output frequencies, the effective
resistance values of the winding can no longer be neglected in order to maintain the motor
flux.
f
Linear V/f
OFF
ON
t
t
⏐f⏐
P1310 active
t
0
1
Validity range
Vmax
Vn
(P0304)
V
ConBoost,100
0
fn
(P0310)
f max
(P1082)
V
f
Boost,end
(P1316)
Boost
Ou
tpu
t v
olt
ag
e
actual V
No
rm
al
V/
f
(P
13
00
=
0
)
V
ConBoost,50
Boost voltage
P1311 =...
Acceleration boost
(entered in %)
Voltage boost for accelerating/braking as a % relative to P0305 and P0350. P1311 only
results in a voltage boost when ramping-up/ramp-down and generates an additional torque
for accelerating/braking. Contrary to parameter P1312, that is only active for the 1
st
acceleration operation after the ON command, P1311 is effective each time that the drive
accelerates or brakes.
Vmax
Vn
(P0304)
V
AccBoost,100
0
fn
(P0310)
fmax
(P1082)
f
V
f
Boost,end
(P1316)
V
AccBoost,50
Boost
U/
f n
orm
al
(P
13
00
=
0)
V ist
Au
sg
an
gs
sp
an
nu
ng
OFF
ON
t
t
⏐f⏐
P1311 aktiv
t
0
1
Boost-Spannung
Gültigkeitsbereich
0
50.00 %
0.0 %