Methodology for Optimizing Phase-Shifted Full-Bridge Converters Employing Wide Band-Gap Semiconductors

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dc.contributor Abu Qahouq, Jaber
dc.contributor Kisacikoglu, Mithat
dc.contributor Freeborn, Todd
dc.contributor Zhang, Xuning
dc.contributor.advisor Lemmon, Andrew Shahabi, Ali 2022-04-13T20:34:37Z 2022-04-13T20:34:37Z 2020
dc.identifier.other u0015_0000001_0004288
dc.identifier.other Shahabi_alatus_0004D_14269
dc.description Electronic Thesis or Dissertation
dc.description.abstract Switching loss is a major factor in determining the performance of modern power electronics converters. Soft-switching-based converters are, consequently, developed to mitigate this loss mechanism. The phase-shifted full-bridge (PSFB) converter is such a converter that is appealing in many high-power applications, such as datacenters. Understanding the underlying principles of the zero-voltage switching (ZVS) mechanism within this converter and fine-tuning the corresponding system parameters are necessary to achieve higher efficiency and power density. Despite the importance of this subject, there is a lack of broad studies that investigate the interdependence effects of system parameters on ZVS realization and modeling the ZVS transitions accordingly. This dissertation identifies the switching deadtime values as parameters of particular sensitivity for this topology. Subtle changes to the switching deadtime values can result in dramatic changes to the overall system efficiency, especially for certain combinations of other system parameters. This dissertation provides a set of empirically validated analytical tools that provide new insight into the interdependence of these parameters and offer useful guidance to practitioners seeking to maximize the performance of this topology, especially for implementations that utilize Wide Band-Gap (WBG) semiconductors in their structure. A set of practical guidelines is also provided to assist with fine-tuning this topology for maximum performance. Moreover, these sets of analytical tools are employed in this dissertation to design and implement a 10-kW, SiC-based, synchronous-rectified PSFB converter, which is optimized for efficiency and power density.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Data Center
dc.subject.other DC-DC Converter
dc.subject.other Optimization
dc.subject.other Power Electronics
dc.subject.other SiC MOSFET
dc.subject.other Wide Bandgap Semiconductors
dc.title Methodology for Optimizing Phase-Shifted Full-Bridge Converters Employing Wide Band-Gap Semiconductors
dc.type thesis
dc.type text University of Alabama. Department of Educational Leadership, Policy, and Technology Studies Electrical engineering The University of Alabama doctoral Ph.D.

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