Magnetic core structures and construction techniques therefor

Details Magnetic core structures and construction techniques therefor Magnetic core structures and construction techniques therefor

1995-07-18

1997-04-08

Krishnan, Aditya

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02M 3335

Patent

active

056194005

ABSTRACT:
A magnetic device, a method of manufacturing the magnetic device and a DC/DC converter employing the magnetic device. The magnetic device comprises: (1) a first core-portion composed of a magnetic material and having first and second legs associated therewith, the first leg having a first end face and a predetermined first cross-sectional area, the second leg having a second end face and a predetermined second cross-sectional area different from the first cross-sectional area, (2) a winding assembly having first and second windings associated therewith and disposed about first and second winding apertures, respectively, the first and second legs passing through the first and second winding apertures, respectively, to couple the first and second windings magnetically to the first and second legs, respectively, (3) a second core-portion composed of the magnetic material and adapted to mate with the first and second legs of the first core-portion and (4) an interstitial non-magnetic material of a predetermined uniform thickness disposed on the first and second end faces and joining the first and second core-portions to form a core for the magnetic device, the non-magnetic material forming a uniform air gap in the first and second legs.

REFERENCES:
patent: 5327333 (1994-07-01), Boylan et al.
patent: 5353212 (1994-10-01), Loftus, Jr.
"A New Zero-Ripple Switching DC-To-DC Converter and Integrated Magnetics" by Slobodan Cuk; California Institute of Technology; Pasadena, California; 1980 IEEE.
"A New Model for Multiple-Winding Transformer" by Q. Chen, F.C. Lee, J.Z. Jiang, and M. M. Jovanovik; Virginia Power Electronics Center; The Bradley Department of Electrical Engineering; Blacksburg, Virginia.
"Analysis of Integrated Magnetics to Eliminate Current Ripple in Switching Converters" by Slobodan Cuk and William M. Polivka; Power Electronics Group; California Institute of Technology; PCI Apr. 1983 Proceedings.
"Modeling and Analysis of a Multi-Output Cuk Converter" by G.E. Bloom, A. Eris, R. Ruble; Litton Systems; Guidance & Controls Division; Woodland Hills, California; 1980 IEEE.

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