A New Single Phase Multilevel Inverter Topology with Two-step Voltage Boosting Capability

Tapas Roy; Pradip Kumar Sadhu; Abhijit Dasgupta

A New Single Phase Multilevel Inverter Topology with Two-step Voltage Boosting Capability

Tapas Roy

Pradip Kumar Sadhu

Abhijit Dasgupta

Vol. 17, No. 5, pp. 1173-1185, Sep. 2017

10.6113/JPE.2019.17.5.1173

Boosting factor

Capacitor voltage balance

Impedance source inverter

Multilevel inverter

Pulse width modulation

Switched capacitor

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Abstract

In this paper, a new single phase multilevel inverter topology with a single DC source is presented. The proposed topology is developed based on the concepts of the L-Z source inverter and the switched capacitor multilevel inverter. The input voltage to the proposed inverter is boosted by two steps: the first step by an impedance network and the second step by switched capacitor units. Compared to other existing topologies, the presented topology can produce a higher boosted multilevel output voltage while using a smaller number of components. In addition, it provides more flexibility to control boosting factor, size, cost and complexity of the inverter. The proposed inverter possesses all the advantages of the L-Z source inverter and the switched capacitor multilevel inverter like controlling the start-up inrush current and capacitor voltage balancing using a simple switching strategy. The operating principle and general expression for the different parameters of the proposed topology are presented in detail. A phase disposition pulse width modulation strategy has been developed to switch the inverter. The effectiveness of the topology is verified by extensive simulation and experimental studies on a 7-level inverter structure.

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Cite this article

[IEEE Style]

T. Roy, P. K. Sadhu, A. Dasgupta, "A New Single Phase Multilevel Inverter Topology with Two-step Voltage Boosting Capability," Journal of Power Electronics, vol. 17, no. 5, pp. 1173-1185, 2017. DOI: 10.6113/JPE.2019.17.5.1173.

[ACM Style]

Tapas Roy, Pradip Kumar Sadhu, and Abhijit Dasgupta. 2017. A New Single Phase Multilevel Inverter Topology with Two-step Voltage Boosting Capability. Journal of Power Electronics, 17, 5, (2017), 1173-1185. DOI: 10.6113/JPE.2019.17.5.1173.