Sinusoidal Filter - Siemens SINAMICS S120 Function Manual

6.4

Sinusoidal filter

Description
The sine-wave filter limits the rate of rise of voltage and the capacitive charge/discharge
currents that usually occur with inverter operation. They also prevent additional noise caused
by the pulse frequency. The service life of the motor is the same as that with direct line
operation.
CAUTION
If a sine-wave filter is connected to the Power Module or Motor Module, it is absolutely
essential
to activate the filter during commissioning (p0230 = 3) to prevent it 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
● Maximum permissible motor cable lengths:
● Other restrictions: see the Equipment Manual.
Table 6- 5
Parameter number
p0233
p0234
p0290
p1082
p1800
p1802
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
overmodulation. This reduces the maximum output voltage to approx. 85 % of the rated
output voltage.
– Unshielded cables: max. 450 m
– Shielded cables: max. 300 m
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.
Parameter settings for sine-wave filters
Power unit motor reactor
Power unit sine-wave filter
capacitance
Power unit overload response
Maximum rotational speed
Pulse frequency
Modulator modes
Name
Filter inductance
Filter capacitance
Disable pulse frequency reduction
Fmax filter/pole pair number
Nominal pulse frequency of the filter
Space vector modulation without
overmodulation
Basic functions
6.4 Sinusoidal filter
Setting
203