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Extended-Boost Z -Source Inverters

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5 Author(s)
Chandana Jayampathi Gajanayake ; Laboratory for Clean Energy Research, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore ; Fang Lin Luo ; Hoay Beng Gooi ; Ping Lam So
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The Z-source inverter has gained popularity as a single-stage buck-boost inverter topology among many researchers. However, its boosting capability could be limited, and therefore, it may not be suitable for some applications requiring very high boost demand of cascading other dc-dc boost converters. This could lose the efficiency and demand more sensing for controlling the added new stages. This paper is proposing a new family of extended-boost quasi Z -source inverter (ZSI) to fill the research gap left in the development of ZSI. These new topologies can be operated with same modulation methods that were developed for original ZSI. Also, they have the same number of active switches as original ZSI preserving the single-stage nature of ZSI. Proposed topologies are analyzed in the steady state and their performances are validated using simulated results obtained in MATLAB/Simulink. Furthermore, they are experimentally validated with results obtained from a prototype developed in the laboratory.

Published in:

IEEE Transactions on Power Electronics  (Volume:25 ,  Issue: 10 )