V/F Control Technique; Continuous Boost - Siemens MICROMASTER 440 Parameter Manual

Parameter Description
3.29.1

V/f control technique

P1310[3]

Continuous boost

CStat: CUT
P-Group: CONTROL
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:
V
Vmax
Vn
(P0304)
V
ConBoost,100
V
0
V
Vmax
Vn
(P0304)
actual V
V
ConBoost,100
V
0
where voltage values are given
=
V
ConBoost , 100
=
V
ConBoost,5 0
Index:
P1310[0] : 1st. Drive data set (DDS)
P1310[1] : 2nd. Drive data set (DDS)
P1310[2] : 3rd. Drive data set (DDS)
156
Datatype: Float
Active: Immediately
Boost voltage
actual V
Boost
ConBoost,50
f
Boost,end
(P1316) (P0310)
Boost voltage
Boost
ConBoost,50
f fn
Boost,end
(P1316)
(P0310)
P1310
⋅ ⋅
P 0305 P 0350
100
V
ConBoost,1 00
2
Unit: %
QuickComm.: No
Linear V/f
Validity range
ON
OFF
 f 
P1310 active
1
0
f
fn f max
(P1082)
Quadratic V/f
Validity range
ON
OFF
f
P1310 active
1
0
f
fmax
(P1082)
MICROMASTER 440
Issue 01/06
Level
Min: 0.0
2
Def: 50.0
Max: 250.0
t
t
t
t
t
t
Parameter List
6SE6400-5BB00-0BP0