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Browse Journals & Magazines > Power Electronics, IEEE Trans ...> Volume:27 Issue:12 Help

Design and Fabrication of VHF Tapped Power Inductors Using Nanogranular Magnetic Films

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2 Author(s)
Jizheng Qiu ; Thayer Sch. of Eng., Dartmouth Coll., Hanover, NH, USA ; Sullivan, C.R.

The design and fabrication of coupled inductors with low profile, low cost, and high power density for tapped-inductor high-step-down dc-dc power converters in the very-high-frequency (30-300 MHz) range are presented. The inductor consists of a multilayer thin-polyimide printed circuit board with nanogranular thin-film magnetic material deposited on both sides and on beveled cuts to form a fully linked closed core. The magnetic material Co-Zr-O has good soft magnetic properties, high resistivity, and high flux density capability. Multilayer Co-Zr-O/ZrO2 thin films are used to improve the performance of the magnetic core. A winding loss model of this coupled inductor is presented. Coupled inductors with turns ratios 2 and 10 for several different converter applications have been designed, fabricated, and measured. Loss in the magnetic material is investigated. Small-signal and large-signal measurements show good performance of the fabricated components with high-frequency, high-field excitation.

Published in:
Power Electronics, IEEE Transactions on  (Volume:27 ,  Issue: 12 )

Date of Publication: Dec. 2012

Page(s):
4965 - 4975
ISSN :
0885-8993
INSPEC Accession Number:
12862853
Digital Object Identifier :
10.1109/TPEL.2012.2193143
Product Type:
Journals & Magazines
Date of Publication :
03 April 2012
Date of Current Version :
12 July 2012
Issue Date :
Dec. 2012
Sponsored by :
IEEE Power Electronics Society

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