Siemens 440 - Manual (Page 156)

Parameter Description Issue 01/06
MICROMASTER 440 Parameter List
156 6SE6400-5BB00-0BP0
3.29.1 V/f control technique
P1310[3] Continuous boost Min: 0.0
CStat: CUT Datatype: Float Unit: % Def: 50.0
P-Group: CONTROL Active: Immediately QuickComm.: No Max: 250.0
P1310 causes a voltage boost depending on the output frequency (see diagran). At low output frequencies
the output voltage is low to keep the flux level constant. However, the output voltage may be too low
-
for magnetisation the asynchronous motor
- to hold the load
- to overcome losses in the system.
To compensate these effects, the output voltage can be increased using parameter P1310.
Defines boost level in [%] relative to P0305 (rated motor current) applicable to both linear and quadratic V/f
curves according to the diagram below:
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
olta
ge
actual V
No
rm
al
V/f
(P
1300
= 0)
V
ConBoost,50
Boost voltage
V
ConBoost,100
V
Vn
(P0304)
Vmax
f
Boost,end
(P1316)
f 0
OFF
ON
t
t
 f 
P1310 active
t 0
1
Validity range
fn
(P0310)
fmax
(P1082)
Boost
Quadratic V/f
No
rm
al
qu
ad
ra
tic
(P
13
00
=
2
)
V
ConBoost,50
actual V Ou
tpu
t v
olt
ag
e
Boost voltage
where voltage values are given
100
P1310
0350 P 0305 P V
100 , ConBoost
⋅ ⋅ =
2
V
00 ConBoost,1
0 ConBoost,5
V =
Index:
P1310[0] : 1st. Drive data set (DDS)
P1310[1] : 2nd. Drive data set (DDS)
P1310[2] : 3rd. Drive data set (DDS)
Level
2