| 摘要 |
The invention relates to a power converter circuit (10) for single-phase systems. In order to achieve high efficiency and a good cost position, it is proposed that the power converter circuit (10) has a three-point power converter (11) and a two-point power converter (12), wherein the three-point power converter (11) and the two-point power converter (12) are connected between a DC voltage bus having an intermediate circuit voltage (UZK), the three-point power converter (11) has two stacked half-bridges (11a, 11b), the AC voltage outputs (11p, 11n) of which are connected to the upper and lower power connections of a third half-bridge (11c), wherein the central power connection of the third half-bridge (11c) is provided as a first output (Wp) of the power converter circuit (10), the two-point power converter (12) has a half-bridge, the central power connection of which is provided as a second output (Wn) for the power converter circuit (10), a series circuit comprising capacitors (C1, C2) is connected between the DC voltage bus, which capacitors are provided for the purpose of producing a neutral point (M) of the intermediate circuit voltage (UZK) at the point between the capacitors (C1, C2) and the stacked half-bridges (11a, 11b), wherein the first capacitor (C1) is connected in parallel with DC voltage inputs of the first half-bridge (11a) and the second capacitor (C2) is connected in parallel with DC voltage inputs of the second half-bridge (11b). |
