| 摘要 |
<p>A submodule for a modular multilevel converter has at least one unipolar energy storage device, first and second connection terminals and a power semiconductor circuit with power semiconductor switches that are driven with a control signal and freewheeling diodes connected in parallel with an assigned power semiconductor switch in the opposite sense. Depending on the driving of the power semiconductor switches, the voltage across the energy storage device(s) or else a zero voltage can be generated between the first and second connection terminals. The power semiconductor circuit forms a bridging branch between the potential points of the first and second connection terminals. Only the power semiconductor switches in the bridging branch are reverse conductive power semiconductor switches. The submodule has low on-state losses during normal operation and is also cost-effective.</p> |
