New basic unit and cascaded multilevel inverters with reduced power electronic devices

ABSTRACT

In this paper, a new cascade multilevel inverter based on series connection of several basic units is proposed. The basic topology consists of 5 dc voltage sources and 12 switches. The required mathematical analysis consisting of voltage on switches, power losses and the values of dc voltage sources is provided. To verify the advantages of proposed topology, the suggested structure is compared with other multilevel inverter topologies in terms of used dc voltage sources, switches, voltage on switches and the number of on-state switches. The proposed structure uses the least numbers of dc voltage sources and switches compared to other multilevel inverters for the same number of levels. Also, voltage rating on the switches in the proposed topology is less than other topologies. These characteristics cause the weight, size and cost of proposed topology to be reduced. The proposed inverter is implemented using experimental setup. The experimental results verify the performance of proposed structure.

KEYWORDS:

• Multilevel Inverter
• cascaded Multilevel Inverter
• reduced Power Electronic Devices
• voltage Stress
• power Losses
• total Harmonic Distortion

Disclosure statement

No potential conflict of interest was reported by the authors.