Siemens SINAMICS SM150 - Gating; Operating Principle; Figure 3-2 Phase Module

① Block diagram of phase module
② Example: Phase module
Figure 3-2 Phase module
The DC link capacitor bank is connected to the individual phase modules using busbars.
3.3.4 Gating
The gating group and the GCT (Gate-Commutated Thyristor) power semiconductor together
form a fixed unit, the IGCT (Integrated Gate-Commutated Thyristor).
The power semiconductors are connected via the gating boards. The gating command is
transmitted from the power stack adapter (PSA) to the gating board via a plastic fiber-optic
cable connection.
3.4 Operating principle
A constant DC-link voltage for the Motor Module is generated from the line voltage. The Motor
Module provides the power for the connected motor via the DC-link voltage.
The DC link capacitors smooth the voltage and stop the energy in the DC link. The DC link
capacitors are maintenance free and self-healing. The device is switched off when the circuit
breaker is disconnected/opened. The DC link is discharged by means of balancing resistors.
Description
3.4 Operating principle
SINAMICS SM150 6SL3845-7NN46-7AA2
32 Operating Instructions Rev.201910281345 EXAMPLE