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Article | REF: D2102 V1

Permanent magnets - Applications and prospects

Authors: Luc LECHEVALLIER, Jean-Marie LE BRETON, Philippe TENAUD, Antoine MOREL, Serge BRASSARD

Publication date: May 10, 2007

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ABSTRACT

Permanent magnets present extremely positive future prospects in a certain number of industrial sectors. The growth of the automobile market added up to that of the number of magnets per vehicle contribute to the development of the permanent magnet market, essentially ferrites. Other sectors of activity such as aeronautics, wind energy and IT use magnets from the rare-earth family, essentially Nd-Fe-B. Other families of magnets, such as Alnico and Sm-Co are used for niche applications due to their specific properties.

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AUTHORS

  • Luc LECHEVALLIER: Doctor of Physics - Lecturer at the IUP Electrical Engineering of the University of Cergy-Pontoise - Materials Physics Group, UMR CNRS 6634 - University of Rouen, Faculty of Science and Technology

  • Jean-Marie LE BRETON: Doctor of Physics - Professor at the University of Rouen - Materials Physics Group, UMR CNRS 6634 - University of Rouen, Faculty of Science and Technology

  • Philippe TENAUD: Engineer, Doctor of Physics - Research and Development Director - UGIMAG, Saint Pierre d'Allevard

  • Antoine MOREL: Doctor of Physics - Research and Development Engineer - UGIMAG, Saint Pierre d'Allevard

  • Serge BRASSARD: Engineer, Doctor of Electrical Engineering - Research and Development Engineer - UGIMAG, Saint Pierre d'Allevard

 INTRODUCTION

The future prospects for permanent magnets are very bright in a number of industrial sectors. The growth of the automotive market, coupled with the increase in the number of magnets per vehicle, continues to drive the market for permanent magnets, mainly ferrites.

Other more innovative and fast-developing sectors, such as aeronautics, energy (wind power) and information technology, use magnets from the rare-earth family, essentially Nd-Fe-B. The other magnet families (Alnico, Sm-Co) are used for niche applications, due to their specific properties: Alnico for applications such as metrology, and Sm-Co for applications at high temperatures or in aggressive atmospheres.

The study of permanent magnet applications in this dossier considers the various energy conversions that can be achieved with these magnets.

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