{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/114111"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/114111","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A four-level dual active bridge converter for data center applications","abstract":"Embargo set by: Seth Robbins for item 123476 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","abstract_html":"Embargo set by: Seth Robbins for item 123476 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","abstract_has_math":false,"creators":["Jiang, Wentao"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Stillwell, Andrew R"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-04-29T21:58:41Z","date_published":"2022-04-29T21:58:41Z","updated_at":"2026-07-22T22:24:54Z","subjects":["Engineering"],"languages":["en","eng"],"rights":["Copyright 2021 Wentao Jiang"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/114111","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Stillwell, Andrew R"]},{"key":"dc:creator","label":"Author","values":["Jiang, Wentao"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-04-29T21:58:41Z","2024-04-29T21:58:46Z","2021-12","2021-12-09"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2021 Wentao Jiang"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/114111"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Embargo set by: Seth Robbins for item 123476 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01","The student, Wentao Jiang, accepted the attached license on 2021-12-08 at 15:06.","The student, Wentao Jiang, submitted this Thesis for approval on 2021-12-08 at 15:08.","This Thesis was approved for publication on 2021-12-09 at 15:24.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17418 on 2022-04-29 at 16:10:45","Made available in DSpace on 2022-04-29T21:58:41Z (GMT). No. of bitstreams: 2 JIANG-THESIS-2021.pdf: 14070518 bytes, checksum: eda47b270e698185334068340f7f625a (MD5) LICENSE.txt: 4209 bytes, checksum: de81c44f1063a303110ec91daed1e677 (MD5) Previous issue date: 2021-12-09","The Dual Active Bridge (DAB) bi-directional DC/DC converter is a popular topology originally designed for energy storage applications. It has high efficiency, galvanic isolation, and, most importantly, controllable power flow. However, for high voltage conversion ratio applications, there are challenges on switch stress and component size. In this work, we are replacing the half bridges on the primary side of the original DAB with Flying-Capacitor Multi-Level (FCML) topology using Phase-Shifted Pulse Width Modulation (PS-PWM) control scheme. While the original benefits are still available, the voltage stress across each switch is reduced, enabling the use of faster GaN switches that also have smaller drain-to-source turn-on resistance. The increased switching frequency at the AC node also decreases the size of the auxiliary inductor. The theory of operation and the simulation result of the new topology will be discussed. Then, the initial measurements from an experimental prototype are presented. The hardware prototype demonstrates the converter topology's ability to maintain a steady voltage output for a varying load at a high voltage conversion ratio and a large voltage input."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["A four-level dual active bridge converter for data center applications"]}]}],"canonical_facts":{"dc:contributor":["Stillwell, Andrew R"],"dc:creator":["Jiang, Wentao"],"dc:date":["2022-04-29T21:58:41Z","2024-04-29T21:58:46Z","2021-12","2021-12-09"],"dc:description":["Embargo set by: Seth Robbins for item 123476 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01","The student, Wentao Jiang, accepted the attached license on 2021-12-08 at 15:06.","The student, Wentao Jiang, submitted this Thesis for approval on 2021-12-08 at 15:08.","This Thesis was approved for publication on 2021-12-09 at 15:24.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17418 on 2022-04-29 at 16:10:45","Made available in DSpace on 2022-04-29T21:58:41Z (GMT). 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The increased switching frequency at the AC node also decreases the size of the auxiliary inductor. The theory of operation and the simulation result of the new topology will be discussed. Then, the initial measurements from an experimental prototype are presented. The hardware prototype demonstrates the converter topology's ability to maintain a steady voltage output for a varying load at a high voltage conversion ratio and a large voltage input."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/114111"],"dc:language":["en","eng"],"dc:rights":["Copyright 2021 Wentao Jiang"],"dc:subject":["Engineering"],"dc:title":["A four-level dual active bridge converter for data center applications"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:54Z"}