Dynamic Voltage Boost 9L Common Ground Inverter with Low Voltage Stress

This paper presents a nine-level dynamic boosting ability switched capacitor (9L-DB-SC) inverter topology for medium-voltage applications, featuring low switching devices. The main advantage of this topology is its utilisation of 11 switches, 2 diodes, and 3 switched capacitors to achieve nine output levels with dynamic voltage boosting. The proposed topology effectively balances the conventional trade-off between utilising fewer components with higher voltage stress and using more components with lower individual voltage stress. In this design, the maximum current stress of the switches does not exceed the current stress of the capacitors. The key features of the topology are verified through simulation studies, followed by experimental analysis. A comparison study is done to demonstrate the advantages of the proposed inverter.