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Design of Synchronous Torque Couplers

Authors: M. H. Nagrial, J. Rizk, A. Hellany


This paper presents the design, analysis and development of permanent magnet (PM) torque couplers. These couplers employ rare-earth magnets. Based on finite element analysis and earlier analytical works both concentric and face-type synchronous type couplers have been designed and fabricated. The experimental performance has good correlation with finite element calculations.

Keywords: Finite Element Analysis, Synchronous TorqueCouplers, Permanent Magnet Torque Couplers

Digital Object Identifier (DOI):

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[1] Waring R. et al. "An investigation of face type magnetic couplers" Proc. Inst. Of Mech. Engineers, vol.210, , pp 263-272, 1996
[2] Overshott, K.J. "The comparison of the pull-out torque of p.m. couplings predicted theoretically with experimental measurements" IEEE Trans., Mag-25(5), pp 3913-3915, Sep 1989.
[3] Ravaud, R.; lemarquand, V.; Lemarquand, G.; "Analytical Design of Permanent Magnet Radial Couplings" IEEE Trans. on Magnetics, 2010.
[4] Canova A. and Vusini B. "Design of axial eddy-current couplers" IEEE Transactions on industrial applications, vol. 39(3), pp. 725-733, May- June 2003
[5] Baran, W. "Analytical methods for the design calculations of p.m. synchronous couplings" ACTA Polytechnica Scandinavia, Applied Physics Series, No. 38, Helsinki, pp 13-19, 1983.
[6] Tawara, Y. et al. "Applications of precipitation-hardened rare-earth cobalt magnets to torque coupling devices" 2nd International Workshop on rare-earth cobalt p.m. and their applications, Dayton, USA, pp 112- 123, 1976.
[7] Hornreich, R.M. and Shtrikman, S. "Optimal design of synchronous torque couplers" IEEE Trans., Mag-14(5), pp 800-802, Sep 1978.
[8] Yonnet "Analytical calculation of permanent magnet couplings" IEEE Trans. on Magnetics, vol. 29, No 6, pp 2932-2934, Nov 1993.
[9] Ferreira, C. and Vaidya, J. "Torque analysis of p.m. couplings using 2D and 3D finite elements methods" IEEE Trans., Mag-25(4), pp 3080- 3082, Jul 1989.
[10] Nagrial, M.H. "Design optimisation of magnetic couplings using high energy magnets" Intl. J1. of Electric Machines and Power Systems. Vol. 21, No. 1, pp 115-126, 1993.
[11] Nagrial, M.H. "Performance of magnetic couplings using Nd-Fe-B magnets" Proc IEEE Conference "IECON-96" pp. 997-998, Taipei, Taiwan, Aug. 1996.
[12] Roters, H.C. Electromagnetic Devices, John Wiley, 1970.
[13] Wang, Yu Lin "Near-optimal design and 3-D finite element analysis of multiple sets of radial magnetic couplings" IEEE Trans. On Magnetics, Vol. 44(12), pp. 4747-4753, Dec 2008
[14] Wu W., Lovatt H. C. and Dunlop J. B. "Analysis and design optimisation of magnetic couplings using 3D finite element modeling". IEEE Trans., Mag-33 (5), pp 4083-4085, Sep 1997.
[15]Nagrial, M.H. "Finite element analysis and design of variable reluctance (VR) torque couplers". Proc. International conference on power electronics and drive systems, pp.252-254, vol. 1, 26-29 May 1997.