Application of Z-Source Inverter in High Voltage and Multiple Output dc-dc Power Supplies

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Karimi, Yaser | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41307 (05)
University: Sharif University of Technology
Department: Electrical Engineerign
Advisor(s): Kaboli, Shahriyar
Abstract:
High voltage dc-dc converters are widely used in industrial applications. One of the methods for generating the high voltage is series connection of isolated voltage sources which can be produced by a multiple output converter. One major problem of multiple output converters is their cross regulation. In this project, the operation of a full-bridge based dc-dc converter (FBBC) is investigated in both single output and multiple output cases and analytical expressions for its output voltage and cross regulation are derived. Then, the effect of different parameters of the converter on the cross regulation is studied. It has been shown that increasing the input voltage of the converter improves the cross regulation. In addition, increasing the input voltage eliminates some major problems of this converter related to leakage inductance of the transformer. Based on these analyses, a new converter incorporating Z-Source Inverter is proposed that boosts the input voltage with a unique single stage structure. The simulation and experimental results are presented to investigate the validity of derived results
Keywords:
High-Voltage DC-DC Converter ; Cross Regulation ; Z-Source Inverter ; Full-Bridge Inverter ; Leakage Inductance

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