Patent ID: 8422254

Claim:
A multi-cell Voltage Source Converter having at least one phase leg connecting to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells, each said switching cell having on one hand at least two semiconductor assemblies connected in series and having each at least one energy storing capacitor as well as two terminals connecting the cell to adjacent cells in said series connection of switching cells, a mid point of said series connection of switching cells forming a phase output being configured to be connected to an alternating voltage side of the converter, where said series connection of switching cells includes inductance means in the form of a plurality of inductors built in in said series connection of switching cells and connected in series with these cells by being connected to said terminals thereof, wherein said inductors are formed by an elongated conductor electrically interconnecting adjacent switching cells in said series connection of switching cells while surrounding at least parts of said switching cells by making at least substantially one turn therearound so as to create a dielectric shield around such switching cells.