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Abstrakty
Permanent magnet bearings may be conveniently employed in several mechanical applications when friction and wear have to be avoided. The mechanical behaviour of these components is defined by the force acting between the elements of the bearing and by the stiffness of the system. In order to get the desired performance of the bearing a compromise of force and stiffness can be achieved, e.g. by selecting the magnetisation direction of the elements. The paper reviews some general criteria for permanent magnet bearing design and proposes a method for evaluating the most suitable magnetisation direction, based on the equivalent current method and employing Finite Element analyses. Three sample cases of annular and tapered bearing are reported, for which design maps for axial and radial bearings are also presented.
Rocznik
Tom
Strony
655--673
Opis fizyczny
Bibliogr. 16 poz., rys., wykr.
Twórcy
autor
- Department of Mechanical, Nuclear and Production Engineering University of Pisa, Diotisalvi 2 Str., 56126 Pisa, ITALY
Bibliografia
- [1] Bassani R. and Villani S. (1999): Passive magnetic bearings: the conic-shaped bearing. - Proc. Inst. Mech. Eng., Part J, Journal of Engineering Tribology, vol.213, No.l, pp.151-161.
- [2] Bassani R. (2000): Permanent magnetic levitation and stability. - Nato Advanced Science Institutes Series: Fundamentals of Bridging the Gap Between Macro and Micro/nanoscale Tribology, Budapest: Logot Bt., p.59 (only abstract).
- [3] Bassani R., Ciulli E., Di Puccio F. and Musolino A. (2001): Study of conic permanent magnet bearings. - Meccanica, vol.36, pp.745-754.
- [4] Campbell P. and Zhilichev Y. (2001): A multi axis model of magnetisation for isotropic permanent magnets. - IEEE Transactions on Magnetics, vol.37, No.4, pp.2634-2636.
- [5] Charpentier J.F. and Lemarquand G. (1999): Study of permanent-magnet couplings with progressive magnetisation using an analytical formulation. - IEEE Transactions on Magnetics, vol.35 No.5/3, pp.4206-4217.
- [6] Coey J.M.D. et contributors (1996): Rare-earth Iron Permanent Magnets. - Oxford: Oxford Science Publications.
- [7] Donald F.W. (1980) A passive magnetic-thrust bearing for energy-storage fly wheels. - ASLE Trans., vol.25, No.l, pp.7-16.
- [8] Duffin W.J. (1968): Advanced Electricity and Magnetism for Undergraduates. - London: McGraw-Hill.
- [9] Earnshaw S. (1842): On the nature of molecular forces which regulate the constitution of luminoferous ether. - Trans. Camb. Phil. Soc., vol.7, pp.97-112.
- [10] Fernandez V., Fandino J., Saurey Ch., Yonnet J.P., Reyne G. And Cugat O. (2000): A design methodology for permanent magnet microbearings. - IEEE Transactions on Magnetics, vol.36, No.4, pp. 1919-1922.
- [11] Kamerbeek E.M.H. (1983-84): Magnetic bearings. - Philips Tech. Rev., vol.41, No.l 1/12, pp.348-361.
- [12] Nagaraj H.S. (1988): Investigation on magnetic fields and forces arising in open-circuit-type magnetic bearings. - Trib. Trans., vol.31, No.2, pp.192-201.
- [13] Shen J.X., Vilathgamuwa D.M., Tseng K.J. and Chan W.K. (1999): Novel compact PMSM with magnetic bearing for artificial heart application. - Proceedings of the 1999 IEEE Industry Applications Conference, 34th IAS, pp. 1201-1207.
- [14] Smythe W.R. (1950): Static and Dynamic Electricity. - New York: McGraw-Hill.
- [15] Yokose Y., Cingoski V., Kaneda K. and Yamashita H. (1988): Shape optimization of magnetic devices using genetic algorithms with dynamically adjustable parameters. - Proceedings of the 8th Biennial IEEE Conference on Electromagnetic Field Computation, p.281.
- [16] Yonnet J.P. (1981): Permanent magnet bearings and couplings. - IEEE Transactions on Magnetics, vol. 17, No.l, pp. 1169-1173.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ2-0007-0042