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New Architectures and Nonlinear Control Strategy of Dual Active Bridge Converter

Smith, Zachary (2022) New Architectures and Nonlinear Control Strategy of Dual Active Bridge Converter. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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This dissertation contains 3 distinct research projects that focus on architectures and control strategies for dual active bridge converters and triple active bridge converters. Objective #1 presents design considerations, performance analysis, and control strategy for a current-fed, triple active bridge converter. This project was verified using a digital signal processor to implement a new control method within both 1) a real time digital simulator, and 2) a triple active bridge prototype. Objective #2 evaluates operational performance improvements to a dual active bridge converter through the use of observers and parameter estimators. The observer tracks the converter current without the need for a current sensor. The quick nature of the presented current observer (less than 1ms) allows the converter controller to compensate quickly to a dc bias current, which should reduce stress on the transformer and extend the lifetime of converter components. The proposed parameter estimator is shown to be suited for use with tunable inductors, allowing the controller to maintain design requirements even with dynamically changing magnetics. Objective #3 presents a finite element analysis of a 3-winding, concentric wound, 50kW, 10kHz ferrite ribbon transformer. This study models the performance of the transformer within a triple active bridge experimental test bed. When possible, these projects have been submitted and/or published within IEEE conferences and journals to further the field of study of dual active bridge converters for use in multiport and medium voltage applications.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Smith, Zacharyzas59@pitt.eduzas590000-0003-0689-8168
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairGrainger, Brandon M.bmg10@pitt.edubmg10
Committee MemberKwasinski,
Committee MemberKerestes, Robertrjk39@pitt.edurjk39
Committee MemberOhodnicki, Paulpro8@pitt.edupro8
Committee MemberMcIntyre,
Committee MemberBeddingfield,
Date: 6 September 2022
Date Type: Publication
Defense Date: 14 July 2022
Approval Date: 6 September 2022
Submission Date: 18 July 2022
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 121
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Control Design, Dual Active Bridge, DC-DC Power Converters, Parameter Estimation, State Estimation,
Date Deposited: 06 Sep 2022 16:25
Last Modified: 06 Sep 2022 16:25


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