Sinusoidal Filter - Siemens SINAMICS S120 Function Manual

Basic functions

7.4 Sinusoidal filter

7.4 Sinusoidal filter
The sine-wave filter limits the voltage rate-of-rise and the capacitive charge/discharge
currents that usually occur with converter operation. It also prevents additional noise caused
by the pulse frequency. The service life of the motor is the same as that with direct line
operation.
NOTICE
Inactive sine-wave filters can be damaged during commissioning
If a sine-wave filter is connected to the Power Module or Motor Module, it must be activated
during commissioning (p0230 = 3) to prevent the filter from being destroyed.
If a sine-wave filter is connected to the Power Module or Motor Module, the Power Module
or Motor Module must not be operated without a connected motor because otherwise the
filter can be destroyed.
Usage restrictions for sine-wave filters
The following restrictions must be taken into account when a sine-wave filter is used:
● The output frequency is limited to a maximum of 150 Hz.
● The modulation type is permanently set to space vector modulation without overload. This
reduces the maximum output voltage to approx. 85% of the rated output voltage.
● Maximum permissible motor cable lengths:
– Unshielded cables: Max. 450 m
– Shielded cables: Max. 300 m
● Further restrictions are contained in the following device manuals:
– SINAMICS S120 AC Drive
– SINAMICS S120 Chassis Power Units
– SINAMICS S120 Liquid Cooled Chassis Power Units
Note
If a filter cannot be parameterized (p0230 < 3), this means that a filter has not been provided
for the component. In this case, the drive converter must not be operated with a sine-wave
filter.
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Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions