MODULAR MULTI-STAGE CONVERTER AND SWITCHING MODULE FOR A MODULAR MULTI-STAGE CONVERTER

摘要

The invention relates to a switching module (40) for a modular multi-stage converter (1), comprising a bridge branch (B2) extending between a first and a second outer connection of the switching module and having at least one first disengageable semiconductor switch (H1) and a first energy storage branch (E2), which comprises a first energy store (E1) and at least one second disengageable semiconductor switch (H2), and which is connected parallel to the first semiconductor switch. The invention is characterized by a second energy storage branch (EZ2), which comprises a second energy store (E2) and at least one third disengageable semiconductor switch (H3), wherein the second energy storage branch is connected parallel to the first semiconductor switch and to the first energy storage branch, forming the switch module, wherein the semiconductor switches are connected to the energy stores of the switching module such that an energy store voltage or a zero voltage, decreasing on each of the energy stores, can be generated on the connections (X1, X2) of the switching module. The invention further relates to a modular multi-stage converter having the switching module according to the invention.