A New Symmetric Multilevel Inverter Topology Using Single and Double Source Sub-Multilevel Inverters

Abstract

In recent years, the multilevel converters have been given more attention due to their modularity, reliability, failure management and multi stepped output waveform with less total harmonic distortion. This paper presents a novel symmetric multilevel inverter topology with reduced switching components to generate a high quality stepped sinusoidal voltage waveform. The series and parallel combinations of switches in the proposed topology reduce the total number of conducting switches in each level of output voltages. In addition, a comparison between the proposed topology with another topology from the literature is presented. To verify the proposed topology, the computer based simulation model is developed using MATLAB/Simulink and experimentally with a prototype model results are then compared.

A new generalized switched diode multilevel inverter topology with reduced switch count and voltage on switches

“…In Table , the comparison is carried out in terms of the generalized equation of different parameters for different topologies concerning the number of levels. The topology presented in Ramani et al utilizes the minimum number of switches, but it has full‐bridge inverter as polarity changer, which increases the blocking voltage on the switch. So it is difficult to use in high voltage applications.…”

“…Another MLI topology has been developed with sub‐MLI in symmetric condition and cascaded method in asymmetric condition to produce a higher number of output voltage levels with reduced switches and dc sources. However, these cascaded topologies have been optimized to achieve the maximum number of level when utilizing the minimum number of dc source, switches, gate driver circuits, and blocking voltage in previous studies .…”

A Single-Phase Cell-Based Asymmetrical Cascaded Multilevel Inverter

“…For any inverter, the efficiency calculation is necessary because it is the performance factor when different fractions of loads are considered [17]. The following is the formula for the efficiency calculation when the output and input power are known.…”

A New Symmetric Cascaded Multilevel Inverter Topology Using Single and Double Source Unit

“…The proposed basic symmetric multilevel inverter presented in [19] comprises a single and double source unit (Fig. 1).…”

“…The general form of the k sub-module dc voltage sources is (19) As clearly shown in Fig. 8, the maximum number of voltage steps are obtained from n=1.…”