Analytical design methodology for Litz-wired high-frequency power transformers

In the last quarter of a century, high-frequency (HF) transformer design has been one of the major concerns to power electronics designers in order to increase converter power densities and efficiencies. Conventional design methodologies are based on iterative processes and rules of thumb founded mo...

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Autores: Barrios Rípodas, Ernesto, Ursúa Rubio, Alfredo, Marroyo Palomo, Luis, Sanchis Gúrpide, Pablo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/45231
Acceso en línea:https://hdl.handle.net/2454/45231
Access Level:acceso abierto
Palabra clave:Analytical design methodology
Highfrequency (HF) transformers
Litz wire
Photovoltaic (PV) power electronic converters
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spelling Analytical design methodology for Litz-wired high-frequency power transformersBarrios Rípodas, ErnestoUrsúa Rubio, AlfredoMarroyo Palomo, LuisSanchis Gúrpide, PabloAnalytical design methodologyHighfrequency (HF) transformersLitz wirePhotovoltaic (PV) power electronic convertersIn the last quarter of a century, high-frequency (HF) transformer design has been one of the major concerns to power electronics designers in order to increase converter power densities and efficiencies. Conventional design methodologies are based on iterative processes and rules of thumb founded more on expertise than on theoretical developments. This paper presents an analytical design methodology for litz-wired HF power transformers that provides a deep insight into the transformer design problem making it a powerful tool for converter designers. The most suitable models for the calculation of core and winding losses and the transformer thermal resistance are first selected and then validated with a 5-kW 50-kHz commercial transformer for a photovoltaic application. Based on these models, the design methodology is finally proposed, reducing the design issue to directly solve a five-variable nonlinear optimization problem. The methodology is illustrated with a detailed design in terms of magnetic material, core geometry, and primary and secondary litz-wire sizing. The optimal design achieves a 46.5% power density increase and a higher efficiency of 99.70% when compared with the commercial one.This work was supported in part by the Spanish Ministry of Economy and Competitiveness under Grant DPI2010-21671-C02-01 and Grant DPI2013-42853-R, in part by the Public University of Navarra, and in part by Ingeteam Power Technology.IEEEIngeniería Eléctrica y ElectrónicaIngeniaritza Elektrikoa eta ElektronikoaUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoa2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2454/45231reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglésinfo:eu-repo/grantAgreement/MICINN//DPI2010-21671-C02-01info:eu-repo/grantAgreement/MINECO//DPI2013-42853-R© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.info:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/452312026-06-17T12:41:47Z
dc.title.none.fl_str_mv Analytical design methodology for Litz-wired high-frequency power transformers
title Analytical design methodology for Litz-wired high-frequency power transformers
spellingShingle Analytical design methodology for Litz-wired high-frequency power transformers
Barrios Rípodas, Ernesto
Analytical design methodology
Highfrequency (HF) transformers
Litz wire
Photovoltaic (PV) power electronic converters
title_short Analytical design methodology for Litz-wired high-frequency power transformers
title_full Analytical design methodology for Litz-wired high-frequency power transformers
title_fullStr Analytical design methodology for Litz-wired high-frequency power transformers
title_full_unstemmed Analytical design methodology for Litz-wired high-frequency power transformers
title_sort Analytical design methodology for Litz-wired high-frequency power transformers
dc.creator.none.fl_str_mv Barrios Rípodas, Ernesto
Ursúa Rubio, Alfredo
Marroyo Palomo, Luis
Sanchis Gúrpide, Pablo
author Barrios Rípodas, Ernesto
author_facet Barrios Rípodas, Ernesto
Ursúa Rubio, Alfredo
Marroyo Palomo, Luis
Sanchis Gúrpide, Pablo
author_role author
author2 Ursúa Rubio, Alfredo
Marroyo Palomo, Luis
Sanchis Gúrpide, Pablo
author2_role author
author
author
dc.contributor.none.fl_str_mv Ingeniería Eléctrica y Electrónica
Ingeniaritza Elektrikoa eta Elektronikoa
Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
dc.subject.none.fl_str_mv Analytical design methodology
Highfrequency (HF) transformers
Litz wire
Photovoltaic (PV) power electronic converters
topic Analytical design methodology
Highfrequency (HF) transformers
Litz wire
Photovoltaic (PV) power electronic converters
description In the last quarter of a century, high-frequency (HF) transformer design has been one of the major concerns to power electronics designers in order to increase converter power densities and efficiencies. Conventional design methodologies are based on iterative processes and rules of thumb founded more on expertise than on theoretical developments. This paper presents an analytical design methodology for litz-wired HF power transformers that provides a deep insight into the transformer design problem making it a powerful tool for converter designers. The most suitable models for the calculation of core and winding losses and the transformer thermal resistance are first selected and then validated with a 5-kW 50-kHz commercial transformer for a photovoltaic application. Based on these models, the design methodology is finally proposed, reducing the design issue to directly solve a five-variable nonlinear optimization problem. The methodology is illustrated with a detailed design in terms of magnetic material, core geometry, and primary and secondary litz-wire sizing. The optimal design achieves a 46.5% power density increase and a higher efficiency of 99.70% when compared with the commercial one.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/45231
url https://hdl.handle.net/2454/45231
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MICINN//DPI2010-21671-C02-01
info:eu-repo/grantAgreement/MINECO//DPI2013-42853-R
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IEEE
publisher.none.fl_str_mv IEEE
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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