Inductor design for VHF tapped-inductor dc-dc power converters

Author

Qiu, Jizheng ; Sullivan, Charles R.

Author_Institution

Thayer Sch. of Eng., Dartmouth Coll., Hanover, NH, USA

fYear

2011

fDate

6-11 March 2011

Firstpage

142

Lastpage

149

Abstract

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 multi-layer thin-polyimide printed circuit board (PCB) and nano-granular 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. Multi-layer 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 fabricated.

Keywords

DC-DC power convertors; cobalt; magnetic cores; magnetic materials; oxygen; printed circuits; thin film inductors; zirconium; zirconium compounds; Co-Zr-O-ZrO₂; PCB; VHF tapped-inductor dc-dc power converters; coupled inductor; frequency 30 MHz to 300 MHz; high flux density capability; high resistivity capability; high-step-down power converters; inductor design; magnetic core; multilayer thin-polyimide printed circuit board; nanogranular thin-film magnetic material; soft magnetic properties; winding loss model; Converters; Ear; Inductors; Magnetic cores; Magnetic hysteresis; Magnetic materials; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Conference_Location

Fort Worth, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-8084-5

Type

conf

DOI

10.1109/APEC.2011.5744588

Filename

5744588