Starting Boost; Co: Total Boost Voltage - Siemens MICROMASTER 440 Parameter Manual

Parameter Description
P1312[3]

Starting boost

CStat: CUT
P-Group: CONTROL
Applies a constant linear offset (in [%] relative to P0305 (rated motor current)) to active V/f curve (either
linear or quadratic) after an ON command and is active until
1) ramp output reaches setpoint for the first time respectively
2) setpoint is reduced to less than present ramp output
This is useful for starting loads with high inertia.
Setting the starting boost (P1312) too high will cause the inverter to limit the current, which will in turn
restrict the output frequency to below the setpoint frequency.
V
Vmax
Vn
(P0304)
actual V
V
StartBoost,100
V
StartBoost,50
0
f
(P1316)
where voltage values are given
V
StartBoost , 100
=
V
StartBoost ,50
Index:
P1312[0] : 1st. Drive data set (DDS)
P1312[1] : 2nd. Drive data set (DDS)
P1312[2] : 3rd. Drive data set (DDS)
Example:
Setpoint = 50Hz. Ramping up with starting boost. During ramp up, setpoint changed to 20Hz. As soon as
setpoint changed, starting boost removed because setpoint smaller than present ramp output.
Dependency:
Acceleration boost P1312 has no effect during vector operation.
Note:
See parameter P1310
r1315

CO: Total boost voltage

P-Group: CONTROL
Displays total value of voltage boost (in volts).
158
Datatype: Float
Active: Immediately
Boost voltage
Boost
fn
Boost,end
(P0310)
P1312
= ⋅ ⋅
P 0305 P 0350
100
V
StartBoost ,100
2
Datatype: Float
Min:
Unit: % Def:
QuickComm.: No Max:
Validity range
ON
OFF
f
P1312 active
1
0
f
fmax
(P1082)
Min:
Unit: V Def:
Max:
MICROMASTER 440
Issue 01/06
Level
0.0
2
0.0
250.0
t
t
t
Level
-
4
-
-
Parameter List
6SE6400-5BB00-0BP0