Hf Sine Filter Module; Description - Siemens SINAMICS S120 System Manual

4.4

HF Sine Filter Module

4.4.1

Description

The HF Sine Filter Module is the output filter (sine-wave filter) in the High Frequency Drive. It
limits the harmonics and switching edges generated by the switching operations of the
inverter to values that are permissible for the motor and can be tolerated. It opposes an
excessively high dV/dt rise.
The HF Sine Filter Module comprises a HF Choke Module and a HF Damping Module. This
filter means that the voltage between the motor terminals is almost sinusoidal. This reduces
the voltage stress on the motor windings, which is excited by the pulse frequency of the HF
Motor Module.
The HF Sine Filter Module must be mounted directly to the right of the HF Motor Module.
The HF module line-up can be operated with a pulse frequency of 16 kHz or 32 kHz. This
increases the damping properties of the system.
HF Choke Module
The HF Choke Module contains the reactor of the sine-wave filter. It has a terminal block to
connect the power cables to the motor and a terminal block to connect the Voltage
Protection Module (VPM).
The following signals are acquired in the HF Choke Module, and transferred to the HF
Damping Module for monitoring and diagnostics:
● Reactor temperature via KTY temperature sensor
● Overtemperature trip
HF Damping Module
The HF Damping Module contains the capacitors of the sine-wave filter. Further, part of the
filter power loss is fed back into the DC link via this module. This is the reason that this
module must be connected with the DC link.
4 measured values are acquired in the HF Damping Module, and transferred to the Control
Unit via DRIVE-CLiQ:
● Filter currents in all 3 phases of the filter capacitors
● Damping voltage
● Device temperature
● Temperature of the HF Choke Module via the KTY temperature sensor
High Frequency Drive
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
High Frequency Modules
4.4 HF Sine Filter Module
43