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" Characterization, Analysis, and Application of WBG Power Devices for Future Power Conversion Systems "
Al-Bayati, Ali Mahmoud Salman
Abdul Matin, Mohammad
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Latin Dissertation
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English
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| Record Number
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1058755
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| Doc. No
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TL57872
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| Main Entry
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Al-Bayati, Ali Mahmoud Salman
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| Title & Author
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Characterization, Analysis, and Application of WBG Power Devices for Future Power Conversion Systems\ Al-Bayati, Ali Mahmoud SalmanAbdul Matin, Mohammad
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| College
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University of Denver
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| Date
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2021
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| Degree
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Ph.D.
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2021
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| Note
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165 p.
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| Abstract
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Semiconductor power devices are the most momentous constituents of any power convertersystem. Fast switching, compactness, high performance and efficiency, and hightemperature operation are the exacting challenges experienced by conventional silicon (Si)power device based power converters in many applications. In this dissertation, the widebandgap (WBG) power devices are studied and used to transcend the limitations imposedby the Si power devices. It mainly focuses on characterization and analysis of the behaviorof WBG power devices as well as design and development of efficient, high performance,and reliable dc–dc power converters based on WBG technology. First, usingcomputer simulations, a comprehensive and detailed study is conducted toward attaining anon–isolated dc–dc buck converter with high performance and efficiency for industrial applications.Converter level power device characterization and overall converter efficiencyevaluation are performed and discussed. Furthermore, for high step–up applications suchas the integration of low voltage renewable energy sources with a load or utility, highlyefficient dc–dc SEPIC and ZETA converters are designed and proposed. Different powerdevice combinations are tested in the structure of these converters in order to quantify thepotential of each power device in overall converter performance enhancement. In addition, laboratory experiments are set up and thorough characterization study andevaluation are carried out experimentally of the behaviors of three 1200 V level powerdevices using the same setup. It is aimed to extract the key characteristics of each powerdevice toward quantifying their potentials in applications of power converters. The impacts of the turn–on and turn–off gate resistances on each power device’s switching performance,switching energy losses, and switching speed capabilities are determined and discussed.The optimal driving condition is addressed for each power device. Also, the correlationsbetween the switching energy losses and the power device’s blocking voltage and currentare analyzed and reported. Moreover, the power devices are experimentally explored andassessed in a non–isolated dc–dc buck converter. The operation, thermal condition, andefficiency of the converter with each power device are studied and reported. The results andanalyses provide deep insights, guidelines, and prospects for the design and developmentof advanced power conversion systems.
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| Descriptor
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Electrical engineering
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Engineering
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Abdul Matin, Mohammad
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University of Denver
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