Siemens SINAMICS V20 Operating Instructions Manual page 254

Parameter list
8.2 Parameter list
Parameter Function
The following table presents an overview of control parameters (V/f) that can be modified in relationship to
P1300 dependencies:
P1310[0...2] Continuous boost [%]
Defines boost level in [%] relative to P0305 (rated motor current) applicable to both linear and quadratic V/f
curves.
At low output frequencies the output voltage is low to keep the flux level constant. However, the output
voltage may be too low for the following:
magnetization the asynchronous motor
•
hold the load
•
overcome losses in the system.
•
The inverter output voltage can be increased via P1310 for the compensation of losses, hold loads at 0 Hz
or maintain the magnetization.
The magnitude of the boost in Volt at a frequency of zero is defined as follows:
V_ConBoost,100 = P0305 * Rsadj * (P1310 / 100)
Where:
Rsadj = stator resistance adjusted for temperature
Rsadj = (r0395 / 100) * (P0304 / (sqrt(3) * P0305)) * P0305 * sqrt(3)
Note: Increasing the boost levels increases motor heating (especially at standstill).
Setting in P0640 (motor overload factor [%]) limits the boost:
sum(V_Boost) / (P0305 * Rsadj) <= P1310 / 100
The boost values are combined when continuous boost (P1310) used in conjunction with other boost pa-
rameters (acceleration boost P1311 and starting boost P1312). However priorities are allocated to these
parameters as follows:
P1310 > P1311 > P1312
The total boost is limited by following equation:
sum(V_Boost) <= 3 * R_S * I_Mot = 3 * P0305 * Rsadj
254
Range Factory
default
0.0 - 250.0 50.0
Can be Scaling
changed
U, T PERCENT
Operating Instructions, 11/2016, A5E34559884-006
Data Data Acc.
set type Level
DDS Float 2
SINAMICS V20 Inverter