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Wide Range Swinging Inductor

IP.com Disclosure Number: IPCOM000049439D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Higuchi, HA: AUTHOR

Abstract

This inductor is arranged for a variation in inductance of the order of 100:1. Essentially two ferrite magnetic cores are used in parallel. One core is fitted with a substantial gap as is common in swinging inductors, while the other is substantially without any gap as is common with smoothing inductors.

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Wide Range Swinging Inductor

This inductor is arranged for a variation in inductance of the order of 100:1. Essentially two ferrite magnetic cores are used in parallel. One core is fitted with a substantial gap as is common in swinging inductors, while the other is substantially without any gap as is common with smoothing inductors.

The inductor core comprises four E-shaped parts 11, 12, 13 and 14. These core parts are essentially identical ferrite magnetic core pieces which, as a matter of practice, are commercially available as off the shelf stock items.

In assembling an inductor core, two cores 11 and 12 are butted together. A gap 16 is arranged between the other two parts 13 and 14, and filled with non-magnetic spacer material. This construction eliminates the need to precision-grind the core to effect an air gap.

The cores are simply clamped together for mounting. A winding 20 is conventional, and the turns may be varied a bit to trim the inductor, as desired.

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