Switched Capacitor MLI Design Ideology with Less number of Switches using Hysteresis Bandwidth Control

Abstract

A Fibonacci series based multilevel switched-capacitor (FMLSC) inverter is designed and its ideology are discussed. Contrary to conventional inverter with inductors or transformers, there is no requirement of magnetic components for designing this multilevel inverter (MLI). In this FMLSC, the hysteresis control technique is used to adjust the bandwidth of flying capacitor. The capacitor is charged using source voltage (Vin) and the charged capacitor voltage is increasing by steps based on the Fibonacci series (1, 1, 2, 3, 5,…,) to reach 43 voltage levels. In this work, switched capacitor multilevel inverter (SCML) is designed using unsymmetric multi band hysteresis current control. A 43-level SCML inverter is validated using MATLAB/Simulink. The proposed inverter will provide a possible of good regulation, high efficiency and voltage stability.