Basic functions
7.5 Sine-wave filter
Drive functions
324 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
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.
The sine-wave filter is only available for vector control.
Damage to a sine-wave filter through incorrect parameter assignment
The sine-wave filter can be damaged as a result of an incorrect parameter assignment.
• Activate the sine-wave filter during commissioning via parameter p0230 = 3.
Damage to the sine-wave filter if a motor is not connected
Sine-wave filters, which are operated without a motor being connected, can be damaged or
destroyed.
• Never operate a sine-wave filter on the Power Module or Motor Module without a
connected motor.
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 air-cooled chassis power units
– SINAMICS S120 liquid-cooled chassis power units
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
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