Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
