Use of natural switching in the boundary control of DC/DC buck and boost converters

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buir.advisorMorgül, Ömer
dc.contributor.authorKoç, Yunus Emre
dc.date.accessioned2021-09-14T10:39:49Z
dc.date.available2021-09-14T10:39:49Z
dc.date.copyright2021-08
dc.date.issued2021-08
dc.date.submitted2021-09-13
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (Master's): Bilkent University, Department of Electrical and Electronics Engineering, İhsan Doğramacı Bilkent University, 2021.en_US
dc.descriptionIncludes bibliographical references (leaves 78-84).en_US
dc.description.abstractDC-DC converters are extensively used in many power electronics applications such as photovoltaic systems, wind energy systems, DC motor drives, mobile devices, electric vehicles, etc. Fundamental performance criteria in these appli-cations include tight line and load regulation, low output voltage ripple, high efficiency and fast response to load uncertainties. Also, the trade-off between high performance and component sizes must be considered. In order to meet these requirements, a boundary control method is developed for the resistive loaded buck and boost DC-DC converters. First, normalized plant models are obtained for both converters. The normalization generalizes the controller design by making it independent of the circuit parameters. Then, natural phase plane trajectories of the systems are derived in the normalized domain. Using the nat-ural trajectories of the converters as switching surfaces, special boundary control laws are defined. Switches in the systems are driven by control inputs generated according to the control laws. Via this boundary control method, the fast dy-namic response is provided by utilizing passive components that take up the most space, namely inductor and capacitor, at their theoretical limits. This allows the overall circuit size to be kept small. Finally, the control laws are altered by a small factor so that in steady state, finite and controlled frequency operation and known ripple magnitudes of system states are obtained. In this way, a common problem in boundary control applications called chattering is eliminated. It is shown via simulations that the proposed controllers manage to recover from load and start-up transients by single switching action for both converters.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2021-09-14T10:39:49Z No. of bitstreams: 1 10415975.pdf: 3719905 bytes, checksum: 4c87e8d810620c09d7e41a673bdb912c (MD5)en
dc.description.provenanceMade available in DSpace on 2021-09-14T10:39:49Z (GMT). No. of bitstreams: 1 10415975.pdf: 3719905 bytes, checksum: 4c87e8d810620c09d7e41a673bdb912c (MD5) Previous issue date: 2021-08en
dc.description.statementofresponsibilityby Yunus Emre Koçen_US
dc.format.extentxii, 94 leaves : charts ; 30 cm.en_US
dc.identifier.itemidB130942
dc.identifier.urihttp://hdl.handle.net/11693/76513
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDC-DC buck converteren_US
dc.subjectDC-DC boost converteren_US
dc.subjectBoundary controlen_US
dc.subjectNatural switching surfaceen_US
dc.subjectNormalizationen_US
dc.subjectChattering effecten_US
dc.titleUse of natural switching in the boundary control of DC/DC buck and boost convertersen_US
dc.title.alternativeDA/DA buck ve boost dönüştürücülerin sınır kontrolünde doğal anahtarlamanın kullanılmasıen_US
dc.typeThesisen_US
thesis.degree.disciplineElectrical and Electronic Engineering
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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