V/F Control - Siemens MICROMASTER 440 Operating Instructions Manual

6 Commissioning
6.4.16

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)
Continuous boost (entered in %)
P1310 =...
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.
V
Vmax
Vn
(P0304)
V
ConBoost,100
Acceleration boost (entered in %)
P1311 =...
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
acceleration operation after the ON command, P1311 is effective each time that the drive
accelerates or brakes.
V
Vmax
Vn
(P0304)
V
AccBoost,100
V
AccBoost,50
0
48
Boost voltage
actual V
Boost
V
ConBoost,50
f
0
Boost,end
(P1316)
Boost-Spannung
V ist
Boost
f
Boost,end
(P1316) (P0310)
Linear V/f
Validity range
ON
OFF
⏐f⏐
P1310 active
1
0
f
fn f max
(P0310) (P1082)
ON
OFF
⏐f⏐
P1311 aktiv
1
0
f
fn fmax
(P1082)
Issue 10/06
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Gültigkeitsbereich
MICROMASTER 440
Operating Instructions (Compact)
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