Patent ID: 7957168
Filing Date: 2011-06-07
Classification: H02M

Abstract:
1. An inverter for feeding power from a DC source connected at input terminals to an AC grid connected at a first and a second output terminal, the inverter comprising: a first intermediate circuit comprising two series-connected capacitors connected between the input terminals, with a midpoint between the series-connected capacitors being connected to the first output terminal; a second intermediate circuit coupled to the input terminals through respective diodes, the second intermediate circuit comprising two storage chokes and two storage capacitors; a bridge circuit comprising two series-connected bridge switches; and a grid choke connecting a midpoint of the bridge switches to the second output terminal, and a switchable freewheeling path connected to the midpoint of the bridge switches, wherein the two storage chokes connect the input terminals to the bridge circuit, and wherein the storage capacitors cross-couple the two storage chokes to each other, wherein, in the cross-coupling, a first terminal of a first storage choke of the two storage chokes is coupled to a second terminal of a second storage choke of the two storage chokes via a first capacitor of the two storage capacitors, and a first terminal of the second storage choke is coupled to a second terminal of the first storage choke via a second capacitor of the two storage capacitors.