| 摘要 |
A circuit arrangement for a multilevel power converter comprising a first and second circuit branches, electrically connected in parallel. The arrangement further comprises a positive, negative and neutral potential voltage connections, and first and second AC voltage connections. First circuit branch has controllable first, second and sixth electrical valves and third, fourth and fifth diodes. Second circuit branch has controllable third, fourth and fifth electrical valves and first, second and sixth diodes. In the invention, a power semiconductor switch is connected back-to-back in parallel with a diode provided in a conventional manner in first current branch so that sixth electrical valve is formed, and a power semiconductor switch is connected back-to-back in parallel with a diode provided in a conventional manner in second current branch so that fifth electrical valve is formed. The inventive circuit arrangement has reduced power losses. |
| 主权项 |
1. A circuit arrangement comprising:
a first circuit branch; a second circuit branch, which is electrically connected in parallel with said first circuit branch; a positive potential voltage connection; a negative potential voltage connection; a neutral connection; and first and second AC voltage connections; wherein said first circuit branch has controllable first, second and sixth electrical valves and third, fourth and fifth diodes; wherein said second circuit branch has controllable third, fourth and fifth electrical valves and first, second and sixth diodes; wherein a first load current connection of said first electrical valve is electrically conductively connected to a cathode of said first diode and to said positive potential voltage connection; wherein a second load current connection of said fourth electrical valve is electrically conductively connected to an anode of said fourth diode and to said negative potential voltage connection; wherein a second load current connection of said first electrical valve is electrically conductively connected to a first load current connection of said second electrical valve and a cathode of said fifth diode; wherein an anode of said first diode is electrically conductively connected to a first load current connection of said fifth electrical valve and a cathode of said second diode; wherein an anode of said fifth diode is electrically conductively connected to said neutral connection and to a first load current connection of said sixth electrical valve; wherein an anode of said second diode is electrically conductively connected to said second AC voltage connection and to a first load current connection of said third electrical valve; wherein a second load current connection of said second electrical valve is electrically conductively connected to a cathode of said third diode and to said first AC voltage connection; wherein a second load current connection of said fifth electrical valve is electrically conductively connected to a cathode of said sixth diode and to said neutral connection; and wherein a second load current connection of said sixth electrical valve is electrically conductively connected to an anode of said third diode and to a cathode of said fourth diode; and wherein a second load current connection of said third electrical valve is electrically conductively connected to an anode of said sixth diode and to a first load current connection of said fourth electrical valve. |
