Power converter circuit arrangement having a plurality of parallel power converters or power converter arms and balancing inductors connected in between

Claim 1

A power converter circuit arrangement (1) having a plurality of power converters or power converter arms (2) which are connected in parallel to an intermediate circuit (7) and are each equipped with at least two series-connected, essentially synchronously driven power semiconductor switches (3), in particular IGBTs with a freewheeling diode connected in parallel, a central connection of the series circuit formed by the power semiconductor switches forming a load connection (4), and a balancing inductor being connected between the load connections of each two adjacent power converters or power converter arms, wherein the balancing inductor comprises at least one ring core (5) having any desired closed form, the load connections (4) of two adjacent power converters or power converter arms are looped through each ring core (5) from different sides and are brought together to a common load current connection (6) of all of the parallel power converters or power converter arms.