{"id":{"repo_id":"auckland-tech","oai_identifier":"oai:openrepository.aut.ac.nz:10292/13607"},"canonical_url":"https://search.dev.ndltd.org/etd/auckland-tech/oai:openrepository.aut.ac.nz:10292/13607","repository":{"repo_id":"auckland-tech","name":"AUT University","base_url":"https://openrepository.aut.ac.nz/server/oai/request"},"display":{"title":"Development of a High-Frequency Isolated, Power Factor Corrected Converter","abstract":"When marine vessels connect to shore power supplies, a galvanically isolated AC/AC power converter is typically used to convert the shore supply voltage and frequency to that required by the vessel. Commonly in industry, isolation is provided by a mains frequency transformer. Therefore, the converter size and weight are significant. Within a marine environment, this is very disadvantageous. However, through high-frequency converter operation, advances in terms of reduced size and weight can be realised. To meet required marine vessel specifications, it is shown in this thesis that a high-frequency AC/AC converter is best implemented using a DC-link converter, as the AC input is rectified and regulated, before inversion back to AC. This thesis is concerned with the input stage of an AC/AC converter, comprising the AC/DC converter used to form the DC-link. The proposed AC/DC converter is a bridgeless isolated type, which combines high-frequency isolation, active PFC, and AC/DC conversion into a single stage using a series resonant circuit. A research gap is identified in the design of the resonant circuit necessary for this converter and thus, a design procedure is developed. This is significant, as the resonant circuit plays a crucial role in the converter operation and the ratings needed for its components. The design procedure is verified through simulation using PLECS, and the development of a prototype unit implemented with digital control and silicon carbide switching devices.","abstract_html":"When marine vessels connect to shore power supplies, a galvanically isolated AC/AC power converter is typically used to convert the shore supply voltage and frequency to that required by the vessel. Commonly in industry, isolation is provided by a mains frequency transformer. Therefore, the converter size and weight are significant. Within a marine environment, this is very disadvantageous. However, through high-frequency converter operation, advances in terms of reduced size and weight can be realised. To meet required marine vessel specifications, it is shown in this thesis that a high-frequency AC/AC converter is best implemented using a DC-link converter, as the AC input is rectified and regulated, before inversion back to AC. This thesis is concerned with the input stage of an AC/AC converter, comprising the AC/DC converter used to form the DC-link. The proposed AC/DC converter is a bridgeless isolated type, which combines high-frequency isolation, active PFC, and AC/DC conversion into a single stage using a series resonant circuit. A research gap is identified in the design of the resonant circuit necessary for this converter and thus, a design procedure is developed. This is significant, as the resonant circuit plays a crucial role in the converter operation and the ratings needed for its components. The design procedure is verified through simulation using PLECS, and the development of a prototype unit implemented with digital control and silicon carbide switching devices.","abstract_has_math":false,"creators":["Cunningham, Brendon"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020","date_published":"2020","updated_at":"2026-07-27T18:46:03Z","subjects":["PFC","AC/DC","Isolated","High-Frequency","Converter"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10292/13607"],"render_values":[{"text":"hdl:10292/13607","href":null,"code":true}]}]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2020"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["PFC","AC/DC","Isolated","High-Frequency","Converter"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10292/13607"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.other","label":"Dc Description Other","values":["When marine vessels connect to shore power supplies, a galvanically isolated AC/AC power converter is typically used to convert the shore supply voltage and frequency to that required by the vessel. Commonly in industry, isolation is provided by a mains frequency transformer. Therefore, the converter size and weight are significant. Within a marine environment, this is very disadvantageous. However, through high-frequency converter operation, advances in terms of reduced size and weight can be realised. To meet required marine vessel specifications, it is shown in this thesis that a high-frequency AC/AC converter is best implemented using a DC-link converter, as the AC input is rectified and regulated, before inversion back to AC. This thesis is concerned with the input stage of an AC/AC converter, comprising the AC/DC converter used to form the DC-link. The proposed AC/DC converter is a bridgeless isolated type, which combines high-frequency isolation, active PFC, and AC/DC conversion into a single stage using a series resonant circuit. A research gap is identified in the design of the resonant circuit necessary for this converter and thus, a design procedure is developed. This is significant, as the resonant circuit plays a crucial role in the converter operation and the ratings needed for its components. The design procedure is verified through simulation using PLECS, and the development of a prototype unit implemented with digital control and silicon carbide switching devices."]},{"key":"dc:title","label":"Title","values":["Development of a High-Frequency Isolated, Power Factor Corrected Converter"]}]}],"canonical_facts":{"dc:date.issued":["2020"],"dc:description.other":["When marine vessels connect to shore power supplies, a galvanically isolated AC/AC power converter is typically used to convert the shore supply voltage and frequency to that required by the vessel. Commonly in industry, isolation is provided by a mains frequency transformer. Therefore, the converter size and weight are significant. Within a marine environment, this is very disadvantageous. However, through high-frequency converter operation, advances in terms of reduced size and weight can be realised. To meet required marine vessel specifications, it is shown in this thesis that a high-frequency AC/AC converter is best implemented using a DC-link converter, as the AC input is rectified and regulated, before inversion back to AC. This thesis is concerned with the input stage of an AC/AC converter, comprising the AC/DC converter used to form the DC-link. The proposed AC/DC converter is a bridgeless isolated type, which combines high-frequency isolation, active PFC, and AC/DC conversion into a single stage using a series resonant circuit. A research gap is identified in the design of the resonant circuit necessary for this converter and thus, a design procedure is developed. This is significant, as the resonant circuit plays a crucial role in the converter operation and the ratings needed for its components. The design procedure is verified through simulation using PLECS, and the development of a prototype unit implemented with digital control and silicon carbide switching devices."],"dc:identifier":["hdl:10292/13607"],"dc:subject":["PFC","AC/DC","Isolated","High-Frequency","Converter"],"dc:title":["Development of a High-Frequency Isolated, Power Factor Corrected Converter"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T18:46:03Z"}