Advanced self-balanced seven-level inverter topology based on symmetrical capacitors with voltage-boosting capability

The paper introduces a novel single-DC source inverter that consists of eight switches, two diodes, and two capacitors, and it achieves a seven-level output voltage with three times voltage boosting. The phase opposition disposition pulse width modulation (POD-PWM) technique is employed to generate the triggering pulse. The paper consists of details on the circuit configuration, operating modes, modulation method, capacitor value calculation, inductor value calculation, loss analysis, and performance comparisons. A comparative analysis is conducted to demonstrate that the proposed circuit configuration requires fewer components and achieves a significantly higher boosting factor compared to recently proposed topologies. The excellent results achieved by the proposed seven-level inverter are confirmed through both simulation and practical prototypes. Simulation of the proposed topology is executed and conducted in the MATLAB/Simulink platform, while experimental confirmation is performed in a laboratory-made setup using the TMS320F28379D digital controller platform.