IRON-FREE DRIVE UNIT WITH NON-SCATTERING COIL CONVERTER Russian patent published in 2014 - IPC H04R9/02

Abstract RU 2516393 C2

FIELD: electricity.

SUBSTANCE: invention disclosed a drive (20) with a coil converter, a method of making a magnetic element and loudspeaker. The drive has a coil (22), a magnetic element (23) capable, during use, of providing a path for magnetic flux between ends of said coil (22). The magnetic element (23) has a fastened magnetic device consisting of only one fastened magnet, having a semi-ellipsoidal cross-section which provides a curvilinear path for said magnetic flux.

EFFECT: reduced magnetic field scattering.

11 cl, 7 dwg

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RU 2 516 393 C2

Authors

Lemarkan Gi

Remi Matias

Guijade Gehl'

Dates

2014-05-20—Published

2009-04-29—Filed