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Analytical calculation of ironless loudspeaker motors

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3 Author(s)
M. Berkouk ; Lab. d;Electron. et de Magnet. de Brest, IUT-ENSIETA, France ; V. Lemarquand ; G. Lemarquand

This paper analyzes a concept for ironless loudspeaker motors. The structure is a torus with a cylindrical air gap, formed by toroidal permanent magnets with a triangular cross section. The advantage of this design is that it permits control of the magnetic field inside the structure. The result is ironless self-shielding devices with small flux leakage

Published in:

IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 2 )