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http://dx.doi.org/10.11142/jicems.2012.1.1.067

Switched Inductor Z-Source AC-DC Converter  

Sedaghati, Farzad (Faculty of Electrical and Computer Engineering, University of Tabriz)
Hosseini, Seyed Hossein (Faculty of Electrical and Computer Engineering, University of Tabriz)
Sarhangzadeh, Mitra (Faculty of Electrical and Computer Engineering, University of Tabriz)
Publication Information
Journal of international Conference on Electrical Machines and Systems / v.1, no.1, 2012 , pp. 67-76 More about this Journal
Abstract
Due to the increasing amount of applications of power electronic ac-dc converters, it is necessary to design a single-stage converter that can reliably perform both buck and boost operations. Traditionally, this can be achieved by double-stage conversion (ac/dc-dc/dc) which ultimately leads to less efficiency and a more complex control system. This paper discusses two types of modern ac-dc converters. First, the novel impedance-source ac-dc converter, abbreviated as custom Z-source rectifier, is analyzed; and then, switched inductor (SL) Z-source ac-dc converter is proposed. This paper describes the Z-source rectifiers' operating principles, the concepts behind them, and their superiorities. Analysis and simulation results show that the proposed custom Z-source rectifier can step up and step down voltage; and the main advantage of the SL Z-source ac-dc converter is its high step-up capability. Low ripple of the output dc voltage is the other advantage of the proposed converters. Finally, the SL Z-source ac-dc converter is compared with the custom Z-source ac-dc converter.
Keywords
Z-source converter; Switched-inductor converter; AC-DC converter;
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