Cross‐switched multilevel inverter: an innovative topology

Abstract

Multilevel inverters have attractive features which make them one of the most popular fields of investigations. They can operate in high power and high voltage conditions. Multilevel inverters generate output voltage with high quality and low harmonic contents. As the number of output voltage levels increases, the quality of the output voltage is improved leading to reduction of the filtering requirements. However, multilevel inverters have the disadvantage of increased power electronic switches. This leads to higher cost, size and complication. Some advanced topologies have been introduced to reduce the number of power electronic switches, unfortunately, most of these topologies need high voltage switches on their structure making them unsuitable for high voltage conditions. In this study, an innovative topology for multilevel inverter is proposed which reduces the number of switches considerably without using high voltage switches. The proposed topology is a general topology which can be extended for any number of voltage levels. The authors call this topology as cross-switched multilevel inverter. The simulation results obtained in PSCAD/EMTDC as well as the experimental results verify the proposed topology.

A new and generalized structure of single‐phase and three‐phase cascaded multilevel inverter with reduced power components

“…In addition to these, the features and limitations of those MLI configurations are further incorporated to show the effectiveness of the proposed topology. All the aforesaid MLI topologies are applicable for the asymmetric values of DC sources. MLI topologies studied in previous studies are also applicable for the symmetric values of DC sources.…”

“…Thus, it is always preferable to obtain a greater number of output voltage levels with a much lesser number of power semi‐conductor devices, thereby reducing the complexity and enhancing the reliability of the converter. Recently, several reduced switch MLI configurations are developed by the researchers to enhance the voltage levels with lesser number of power semi‐conductor switches …”

“…Series/parallel conversion of DC voltage sources for the proposed MLI is described in Hinago and Koizumi . MLI topologies presented in Alishah et al and Farhadi Kangarlu and Babaei can be used for high voltage applications such as FACTs devices, electrical machine drive and hybrid electric vehicles due to lower total standing voltage (TSV) on the power switches. An optimal structure–based cascade topology is proposed in Alishah et al that uses H‐bridge for polarity generation.…”

“…The simulation and experimental results are given in Section . All the recent topologies have been compared elaborately with the proposed topology and presented in Section . Efficiency of the proposed inverter is discussed in Section and concluded in Section .…”

Embedded Controller Based Multilevel Inverter Topologies

“…et al [2] proposed three topologies of cascaded H bridge multilevel inverter. Farhadi K.M et al [3] developed a new topology for multilevel inverter is with reduced number of switches without using high voltage switches. Beigi L.M.A.…”