Analytical design methodology for Litz-wired high-frequency power transformers
Ver/
Fecha
2015Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1109/TIE.2014.2351786
Resumen
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 met ...
[++]
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. [--]
Materias
Analytical design methodology,
Highfrequency (HF) transformers,
Litz wire,
Photovoltaic (PV) power electronic converters
Editor
IEEE
Publicado en
IEEE Transactions on Industrial Electronics, 62(4), 2015
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
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.