Method for making a segmented toroidal inductor

Details Method for making a segmented toroidal inductor Method for making a segmented toroidal inductor

1991-09-16

1992-11-24

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29607, 336229, H01F 706

Patent

active

051651629

ABSTRACT:
A small, high-frequency, high-efficiency inductor includes a segmented toroidal core with a winding wound thereon. The toroidal core has either a solid core structure, a laminated core structure, or a strip-wound core structure that is cut into segments. The segmented toroidal core is made of a relatively high-permeability magnetic material and has a plurality of narrow gaps having a width less than approximately 2% of an average linear dimension across the face of each segment. Nonconductive, nonmagnetic spacers are inserted and bonded in the gaps. The inductor winding preferably comprises litz wire in order to further reduce losses.

REFERENCES:
patent: 1420989 (1922-06-01), Fondler
patent: 2382857 (1945-08-01), Camilli
patent: 2446999 (1948-08-01), Camilli
patent: 3014170 (1961-12-01), Nygard

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