Design considerations for high-frequency coaxial winding power transformers

Author

Rauls, Mark S. ; Novotny, Donald W. ; Divan, Deepakraj M.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

Volume

29

Issue

2

fYear

1993

Firstpage

375

Lastpage

381

Abstract

The use of coaxial windings to create low-loss, low-leakage-reactance, power transformers for use in high-frequency soft-switched DC/DC and resonant converters has been demonstrated by M.H. Kheraluwalest al. (1990). Some of the important loss aspects of the design of coaxial winding transformers are examined, including the influence of the skin effect on winding resistance, the variation of core loss caused by nonuniform core flux density, and the choice of the principle dimensions and aspect ratios for maximum efficiency. Experimental measurements on a 50 kVA, 50 kHz unit are included to confirm portions of the analytical results and suggested design procedures

Keywords

losses; power convertors; power transformers; skin effect; transformer cores; transformer windings; 50 kHz; 50 kVA; DC/DC converters; coaxial winding power transformers; core loss; high-frequency; low-leakage-reactance; low-loss; nonuniform core flux density; resonant converters; skin effect; soft-switched; winding resistance; Coaxial components; Conductors; Core loss; DC-DC power converters; Inductance; Magnetic cores; Magnetic flux; Power transformers; Resonance; Transformer cores;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.216547

Filename

216547