Commissioning via the built-in BOP
5.6 Function commissioning
SINAMICS V20 Converter
90
Operating Instructions, 10/2019, A5E34559884-012
5.6.2.3
Setting the voltage boost
Functionality
For low output frequencies, the V/f characteristics only give a low output voltage. The ohmic
resistances of the stator winding play a role at low frequencies, which are neglected when
determining the motor flux in V/f control. This means that the output voltage can be too low in
order to:
●
implement the magnetization of the asynchronous motor
●
hold the load
●
overcome losses in the system.
The output voltage can be increased (boosted) in the converter using the parameters as
shown in the table below.
Parameter Boost type
Description
P1310
Continuous boost
[%]
This parameter defines boost level relative to P0305 (rated motor current) applicable to
both linear and quadratic V/f curves.
Range: 0.0 to 250.0 (factory default: 50.0)
The voltage boost is effective over the complete frequency range whereby the value
continually decreases at high frequencies.
Summary of Contents for SINAMICS V20 Inverter
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