VARIABLE AIR-GAP HYSTERESIMETER AN ALTERNATIVE METHOD FOR THE CHARACTERIZATION OF PERMANENT MAGNETS

Authors

  • Aly F. Flores Filho
  • Hector R. Anocibar
  • Roberto P. Homrich

Keywords:

Characterization of permanent magnets, hysteresimeter, linear demagnetization of permanent magnets, Rare-Earth permanent magnets

Abstract

The determination of the main magnetic properties of permanent magnets usually requires sophisticated and expensive measuring systems. This work analyzes and proposes a low-cost system for the characterization of Rare-Earth permanent magnets with linear characteristic that is simple to set up. Its magnetic circuit comprehends the permanent magnet under test, a steel yoke, a variable air-gap; a Hall-effect sensor connected to a Gaussmeter measures the flux density within the variable air-gap. The theoretical basis of the proposed measuring system, a description of its assembly, and the results it produces for a Neodymium-Iron-Boron permanent magnet will be presented.

References

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of measurement of magnetic properties, Geneva, 1993.
[4] ABNT Associação Brasileira de Normas Técnicas. Guia para a Expressão da Incerteza de Medição. Rio de Janeiro, 1998.
[5] E. O. Doebelin. Measurement Systems: application and design. 3rd ed. New York: McGraw-Hill, 1983. 876 p.
[6] H. R. Anocibar, 2007, “Histerisímetro de Entreferro Variável HEV – Uma Proposta Alternativa para a Caracterização de
Ímãs Permanentes”, Master Degree Thesis, Federal University of Rio Grande do Sul.
[7] A. F. Flores Filho, 1996, “Investigation of a Double Armature Homopolar Brushless D.C. Linear Motor”, PhD Thesis,
University of Wales College of Cardiff.
[8] P. Campbell, Permanent Magnet Materials and Their Application, Cambridge University Press, 1994

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Published

2009-08-01

How to Cite

Aly F. Flores Filho, Hector R. Anocibar, & Roberto P. Homrich. (2009). VARIABLE AIR-GAP HYSTERESIMETER AN ALTERNATIVE METHOD FOR THE CHARACTERIZATION OF PERMANENT MAGNETS. Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe), 8(1), 26S-37S. Retrieved from http://www.jmoe.org/index.php/jmoe/article/view/256

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Section

Regular Papers