Extended boost Z-source inverters

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Abstract
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 demanding 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 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 singlestage 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.

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