Abstract

This paper presents a novel switched capacitor multilevel inverter structure. The presented structure consists of a number of basic units in cascade configuration. The basic unit of the proposed structure has the capability of producing 29 output voltage levels using 15 numbers of power switches, 2 diodes, 2 capacitors and 2 dc sources. The capacitors act as alternative dc sources for producing the different voltage levels. One of the important features of proposed basic unit is that it has the inherent boosting capability and self-capacitor voltage balancing ability. After that cascaded multilevel inverter has been implemented by a number of proposed basic unit structure. Further, the cascaded structure is analyzed for symmetric and asymmetric dc source configurations. Comparison study is performed between the proposed inverter structures and recently developed switched capacitor multilevel inverters in order to showcase the different merits of proposed topology. The effectiveness of proposed structure has been verified by performing simulation study of a 29 level proposed inerter structure in MATLAB/SIMULINK for different load conditions such as R-L load, purely inductive load and sudden load change condition. Total harmonic distortion for output voltage as well as output current is found out to be very low in magnitude.

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