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Advances in Power Electronics
Volume 2012 (2012), Article ID 502763, 8 pages
Research Article

Novel Reduced Parts Online Uninterruptible Power Supply

Department of Electrical Engineering, University of Isfahan (UI), Isfahan 81746-73441, Iran

Received 18 May 2012; Revised 2 October 2012; Accepted 12 October 2012

Academic Editor: Hadi Y. Kanaan

Copyright © 2012 Bahram Ashrafi and Mehdi Niroomand. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents design consideration and performance analysis of novel reduced parts online three-phase uninterruptible power supply (UPS) system. The proposed UPS system is based on reduced switch count dual bridge matrix converter. It employs only six power switches and results in reducing the cost of the system compared to conventional online UPS topologies, while achieving excellent performance. The performance of the proposed system is evaluated through simulation in terms of input/output waveforms quality and shows the viability of topology.