Application and Analysis of Adjustable Profile High Frequency Switchmode Transformer Having a U-Shaped Winding Structure

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Title Application and Analysis of Adjustable Profile High Frequency Switchmode Transformer Having a U-Shaped Winding Structure
Author Lu, Junwei; Dawson, F.P.; Yamada, S.
Journal Name IEEE Transactions on Magnetics
Year Published 1998
Place of publication USA
Publisher Institute of Electrical and Electronics Engineers
Abstract This paper introduces a newly developed high frequency switchmode transformer consisting of a U-shaped winding and a multiple toroidal magnetic core element structure. The new transformer with adjustable profile structure exhibits a utilization of the core area which is better than a planar core but worse than a pot core. The coupling efficiency of the transformer is much higher than a planar core structure. The numerical results for the flux density and eddy current density have been compared with those of a planar and pot core transformer structure. The maximum normalized eddy current density of the new structure is 50% less than a pot core or a planar core. The experimental results at low current excitation indicate that the copper loss is lower at high frequency (10 MHz) when using the new winding structure. The core loss is primarily due to hysteresis and increases significantly if a MnZn based material such as TDK PC40 is used at frequencies above 2 MHz
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1109/20.706543
Copyright Statement Copyright 1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Volume 34
Issue Number 4
Page from 1345
Page to 1347
ISSN 0018-9464
Date Accessioned 1999-01-01
Language en_AU
Research Centre Queensland Micro and Nanotechnology Centre
Faculty Faculty of Engineering and Information Technology
Subject PRE2009-Other Electronic Engineering
URI http://hdl.handle.net/10072/12304
Publication Type Article in Scholarly Refereed Journal
Publication Type Code c1

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