Sinusoidal Filter - Siemens SINAMICS S120 Function Manual

4.14

Sinusoidal filter

Description
The sinusoidal filter limits the rate of rise of voltage and the capacitive charge/dis-
charge currents that usually occur with inverter operation. They also prevent addi-
tional noise caused by the pulse frequency. The service life of the motor is the
same as that with direct line operation.
Caution
If a sinusoidal filter is connected to the converter, the converter must be activated
during commissioning to prevent the filter from being destroyed.
Usage restrictions for sinusoidal filters
The following restrictions must be taken into account when a sinusoidal filter is
used:
S The output frequency is limited to a maximum of 150 Hz.
S The modulation type is permanently set to space vector modulation without
overmodulation. This reduces the maximum output voltage to approx. 85 % of
the rated output voltage.
S Maximum permissible motor cable lengths:
– Unshielded cables: max. 150 m
– Shielded cables: max. 100 m
S Other restrictions: see the Equipment Manual.
Note
If a filter cannot be parameterized (p0230 not 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 sinusoidal filter.
Table 4-7
Order No.
p0233
p0234
p0290
p1082
p1800
p1802
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
Parameter settings for sinusoidal filters
Name
Power module motor reactor
Power module sinusoidal filter
capacitance
Power module overload
response
Maximum rotational speed
Pulse frequency
Modulator modes
Extended Functions
Sinusoidal filter
Setting
Filter inductance
Filter capacitance
Disable pulse frequency
reduction
Fmax filter/pole pair number
Nominal pulse frequency of the
filter
Space vector modulation without
overmodulation
4-221