A New Basic Unit for Cascaded Multilevel Inverters with the Capability of Reducing the Number of Switches

Sara Laali; Ebrahim Babaei; Mohammad Bagher Bannae Sharifian

A New Basic Unit for Cascaded Multilevel Inverters with the Capability of Reducing the Number of Switches

Sara Laali

Ebrahim Babaei

Mohammad Bagher Bannae Sharifian

Vol. 14, No. 4, pp. 671-677, Jul. 2014

10.6113/JPE.2014.14.4.671

H-Bridge Cascaded Multilevel Inverter

Multilevel inverters

New Basic Unit

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Abstract

In this paper, a new basic unit is proposed. Then, a cascaded multilevel inverter basded on the series connection of n number of these new basic units is proposed. In order to generate all of the voltage levels (even and odd) at the output, three different algorithms to determine the magnitude of the dc voltage source are proposed. Reductions in the number of power switches, driver circuits and dc voltage sources in addition to increases in the numbr of output voltage levels are some of the advantages of the proposed cascaded multilevel inverter. These results are obtained through a comparison of the proposed inverter and its algorithms with an H-bridge cascaded multilevel inverter from the point of view of the number of power electronic devices. Finally, the capability of the proposed topology with its proposed algorithms in generating all of the voltage levels is verified through experimental results on a laboratorary prototype of a 49-level inverter.

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Cite this article

[IEEE Style]

S. Laali, E. Babaei, M. B. B. Sharifian, "A New Basic Unit for Cascaded Multilevel Inverters with the Capability of Reducing the Number of Switches," Journal of Power Electronics, vol. 14, no. 4, pp. 671-677, 2014. DOI: 10.6113/JPE.2014.14.4.671.

[ACM Style]

Sara Laali, Ebrahim Babaei, and Mohammad Bagher Bannae Sharifian. 2014. A New Basic Unit for Cascaded Multilevel Inverters with the Capability of Reducing the Number of Switches. Journal of Power Electronics, 14, 4, (2014), 671-677. DOI: 10.6113/JPE.2014.14.4.671.