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dc.contributor.advisorDavid J. Perreault.en_US
dc.contributor.authorMoon, Intaeen_US
dc.contributor.otherMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.en_US
dc.date.accessioned2019-02-14T15:48:07Z
dc.date.available2019-02-14T15:48:07Z
dc.date.copyright2018en_US
dc.date.issued2018en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/120399
dc.descriptionThesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.en_US
dc.descriptionCataloged from PDF version of thesis.en_US
dc.descriptionIncludes bibliographical references (pages 145-147).en_US
dc.description.abstractPower supplies for portable electronics such as cell phones, tablets, and laptops characterized by the low-voltage load are supplied by a single-phase grid-tied ac-dc converter. Achieving miniaturization and high efficiency of power supplies in this application is challenging due to the large voltage conversion ratios and the large variations in conversion ratios. The fact that low-output-voltage, large step-down transformers are often constrained by a minimum single-turn secondary also exacerbates loss and size constraints in such applications. To address this, a new hybrid magnetic-electronic structure is explored - the Variable-Inverter-Rectifier-Transformer (VIRT). This new approach enables voltage conversion in which the transformer provides fractional and reconfigurable effective turns. This new VIRT approach is developed, and multiple implementation approaches are explored, designed and implemented. This design is further augmented with a rectifier topology which allows for a full utilization of the effective core area in all modes of operation and hence improvement in a core loss. Moreover, a hybrid Litz-PCB construction of VIRT transformer is explored. This approach reduces copper loss and easily satisfies the voltage insulation requirements in such "off-line" applications (2.5 kV in this case [1]) through use of a triple insulated litz wire.en_US
dc.description.statementofresponsibilityby Intae Moon.en_US
dc.format.extent147 pagesen_US
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsMIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582en_US
dc.subjectElectrical Engineering and Computer Science.en_US
dc.titleDesign and implementation of a converter with wide operating range using a Variable-Inverter-Rectifier-Transformer structureen_US
dc.typeThesisen_US
dc.description.degreeS.M.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
dc.identifier.oclc1083763427en_US


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