How to develop a single-phase multilevel inverter topology?

This study proposes a step-wise design procedure for development of a single-phase multilevel inverter topology. It is started with a module consisting of a single switch and single source. The number of switches and sources is gradually added in the module to increase the number of levels and quality of the output voltage.

What is a single-phase cascaded multilevel inverter?

A single-phase cascaded multilevel inverter based on a new basic unit with reduced number of power switches. IEEE Trans. Ind. Electron. pp. 922-929. R. Majdoul, A. Touati, A. Aitelmahjoub, M. Zegrari, A. Taouni, A. Ouchatti. 2020. A Nine-Switch Nine-Level Voltage Inverter New Topology with Optimal Modulation Technique.

How to design a multilevel inverter?

The first step of the design process of multilevel inverter starts with a single DC source V1 and single unidirectional controlled switch S1 connected to a load as shown in Fig. 1a. The controlled switch has an anti-parallel body diode which enables bidirectional current flow in the circuit.

What is a five-level step-up multilevel inverter topology?

A single-phase five-level step-up multilevel inverter topology is presented in [ 22] with reduced losses and voltage stress. This inverter is able to generate both polarities of voltage levels and can enhance the input voltage magnitude without adding extra source.

What is the topology of a multilevel inverter?

Neutral-point-clamped (NPC) inverters are the most widely used multilevel inverter topology in high power applications. Figure-1 shows some variants of this topology. Figure-1ab shows the topology of a three-level and five-level inverter respectively.

What are the disadvantages of multilevel inverters?

Certainly, multilevel inverters also have disadvantages such as: the number of semiconductors and voltage sources (isolated or not) necessary for the operation of these inverters, which increases with the increase in the required number of voltage levels.