A Novel Boost Fifteen-Level Asymmetrical Flying-Capacitor Inverter with Natural Balancing of Capacitor Voltages

In this article, a novel Boost Fifteen-level Flying-Capacitor (BFFC) inverter is suggested. The proposed inverter employs eleven switches, four diodes, two capacitors, and three voltage sources to generate a boosted output voltage. The boosting characteristic of the proposed inverter is obtained by using the capacitors serried to the input voltage sources. The phase disposition SPWM method is utilized in order to balance the voltage of capacitors. The main merits of the suggested inverter are reactive power transfer, voltage step-up, and natural balancing of capacitor voltage. A brief comparison with some recent fifteen-level flying capacitor inverters is constructed to show the merits of the suggested topology. The suggested topology needs fewer components compared to some topologies, which leads to a reduction in gate driver, price, and volume. The circuit topology, the operating state, and the capacitor design have been concluded in this article. Moreover, the performance of the proposed inverter is obtained under different modulation indexes to obtain multiple different levels of output voltage for more applications. Finally, to verify various features and performance of novel topology, the suggested topology has been tested in MATLAB/SIMULINK software.