Patent ID: 8638581

Claim:
An inverter, comprising: two input lines configured to connect to a DC voltage source; two half-bridges connected to the two input lines, wherein the two half-bridges are connected together in parallel; and two output lines configured to connect to an alternating current load or an AC power grid; wherein each half-bridge comprises two pulse-operated switches with reverse connected diodes, and wherein a first output line of the two output lines is connected to a center point of a first half-bridge of the two half-bridges via a first inductance, and a second output line of the two output lines is connected to a center point of a second half-bridge of the two half-bridges via a second inductance, and wherein both of the two output lines are connected to a same one of the two input lines via a respective one further pulse-operated switch, and wherein the connection of the further pulse-operated switches to the two output lines is behind the first and second inductances, respectively, with respect to the first and second half-bridges, respectively, wherein the controller is configured to pulse-operate the switches of the half-bridges in a criss-cross manner at a frequency that is a multiple greater than the output frequency of the inverter and keep open the two further pulse-operated switches, in an operation mode of the inverter for outputting reactive power.