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Design and Experimentation of Boost Cascaded DC Link Inverter for Domestic UPS Applications

R. Uthirasamy

Department of Electrical and Electronics Engineering, Jansons Institute of Technology, Coimbatore, India

Corresponding author.

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U. S. Ragupathy

Department of Electronics and Instrumentation Engineering, Kongu Engineering College, Erode, India

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https://doi.org/10.1142/S021812661550156XCited by:3 (Source: Crossref)

Abstract

A new structure of Boost Cascaded DC Link H-Bridge Inverter (BCDCLHBI) is proposed for domestic UPS applications. It consists of DC-DC converter, sub-multilevel modules and H-bridge inverter circuits. The proposed sub-multilevel modules synthesize a stepped DC link voltage with reduced voltage stress across the H-bridge inverter. Compared with conventional two-level inverter the proposed stepped DC link inverter configuration has reduced Power Spectral Density (PSD) and reduced voltage stress. Compared with conventional Cascaded Multilevel Inverter (CMLI) configuration, the proposed system has reduced power switches, DC sources and gate driver requirements. To obtain better quality of AC power output, carrier-level shifted Pulse Width Modulation (PWM) schemes are developed for sub-multilevel switching. A simulation and prototype model of 7-level BCDCLHBI is developed and its performance is validated.

This paper was recommended by Regional Editor Piero Malcovati.

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