A High Boost Cascaded Multilevel Inverter Topology Using Switched Capacitor Converters

A new switched capacitor converter (SCC) is proposed for switched capacitor-based multilevel inverters (SCMLI). The SCC can be assembled in cascades and does not have any ‘not connected’ state. It requires fewer external circuits because of the capacitors’ ability for self-voltage balancing. The basic SCC unit is used first to construct a triple-boost seven-level inverter (TBSLI). Then, a larger range of voltage levels is produced by combining two SCC units. This extended version can operate in symmetric or asymmetric modes and produce a voltage output having 13 levels and 49 levels, respectively, depending on the values of the two dc voltage sources. Next, the proposed topology is supported by detailed comparisons with recent literature and simulation findings. The advantages of this design include a three-fold increase in the input voltage, greater efficiency, and a reduction in the requirement for the number of dc voltage sources and switches. The suggested structure can be used in commercial applications to significantly increase the performance of the existing dc-ac converters.