volume | PIER Journals

2014-01-14

Synthesis of a Magnetic Field Concentrated in One Dimension

Gareth K. Sessel,

Dr. Gareth K. Sessel

School of Electrical and Information Engineering

University of Witwatersrand

South Africa

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Ivan William Hofsajer

Dr. Ivan William Hofsajer

School of Electrical and Information Engineering

University of the Witwatersrand

South Africa

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Progress In Electromagnetics Research, Vol. 144, 141-150, 2014

doi:10.2528/PIER13121304

Abstract

The focusing of a magnetic field, at low frequencies, in the very near field is difficult as flux lines naturally tend to disperse. It is not possible to use antenna array techniques due to large wavelengths at low frequencies. A method for synthesizing a concentrated magnetic field in a large air gap between two magnetic poles is presented. The focusing effect is brought about by the inclusion of side poles, adjacent to each of the main poles. Through the correct dimensioning of the side poles' reluctances and relative magneto-motive forces it is possible to focus the field in the center of the gap. General design curves for normalized parameters, determined via finite element modelling, are presented. A scale model is experimentally verified.

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Gareth K. Sessel, and Ivan William Hofsajer, "Synthesis of a Magnetic Field Concentrated in One Dimension," Progress In Electromagnetics Research, Vol. 144, 141-150, 2014.
doi:10.2528/PIER13121304

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