Ironless and leakage free voice-coil motor made of bonded magnets

IEEE Transactions on Magnetics

Volumn 44, Issue 11 PART 2, 2008, Pages 4289-4292

  Remy, Mathias ^a,b   Lemarquand, Guy ^a   Castagnede, Bernard ^a   Guyader, Gaël ^b  

^a UNIVERSITÉ DU MAINE   (France)

^b RENAULT   (France)

Author keywords

Bonded magnets; Loudspeakers; Magnetic field analytical calculations; Permanent magnet rings

Indexed keywords

ANALYTICAL MODELS; ELECTRIC COILS; LOUDSPEAKERS; PERMANENT MAGNETS;

2-D MODEL; ANALYTICAL CALCULATION; BONDED MAGNET; FREE STRUCTURES; SINTERED MAGNETS; VOICE COIL MOTORS;

POSITION CONTROL;

EID: 61849111773     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2008.2003401     Document Type: Article

References (13)

1. M. R. Gander, "Moving-coil loudspeaker topology as an indicator of linear excursion capability", J. Audio Eng. Soc., vol. 29, no. 1/2, pp. 10-26, Jan. 1981.
2. J. Vanderkooy, "A model of loudspeaker driver impedance incorporating Eddy currents in the pole structure", J. Audio Eng. Soc., vol. 37, no. 3, pp. 119-128, Mar. 1989.
3. C. S. Koh, "Magnetic pole shape optimization of permanent magnet motor for reduction of cogging torque", IEEE Trans. Magn., vol. 33, no. 2, pp. 1822-1827, Feb. 1997.
4. K. Atallah and D. Howe, "The application of halbach cylinders to brushless ac servo motors", IEEE Trans. Magn., vol. 34, no. 4, pp. 2060-2062, Apr. 1998.
5. M. Berkouk, V. Lemarquand, and G. Lemarquand, "Analytical calculation of ironless loudspeaker motors", IEEE Trans. Magn., vol. 37, no. 2, pp. 1011-1014, Mar. 2001.
6. G. Lemarquand, "Ironless loudspeakers", IEEE Trans. Magn., vol. 43, no. 8, pp. 3371-3374, Aug. 2007.
7. W. House, "Transducer Motor Assembly", U. S. Patent 5 142 260, 1992.
8. Ohashi, "Magnetic Circuit and Speaker", Patent EP 1 553 802 A2, 2005.
9. Z. Jibin, Z. Jiming, and H. Jianhui, "Design and pressure control of high-pressure differential magnetic fluid seals", IEEE Trans. Magn., vol. 39, no. 5, pp. 2651-2653, Sep. 2003.
10. J. P. Yonnet, J. M. D. Coey, Ed., "Magnetomechanical devices", in Rare-Earth Iron Permanent Magnets. Oxford, U. K.: Oxford Science, 1996.
11. F. Bancel and G. Lemarquand, "Three-dimensional analytical optimization of permanent magnets alternated structure", IEEE Trans. Magn., vol. 34, no. 1, pp. 242-247, Jan. 1998.
12. H. L. Rakotoarison, J. P. Yonnet, and B. Delinchant, "Using coulombian approach for modelling scalar potential and magnetic field of a permanent magnet with radial polarization", IEEE Trans. Magn., vol. 43, no. 4, pp. 1261-1264, Apr. 2007.
13. R. Ravaud, G. Lemarquand, V. Lemarquand, and C. Depollier, "Analytical calculation of magnetic field created by permanent magnet rings", IEEE Trans. Magn., vol. 44, no. 8, pp. 1982-1989, Aug. 2008.