Permanent magnet system with associated coil arrangement

Details Permanent magnet system with associated coil arrangement Permanent magnet system with associated coil arrangement

1991-07-05

1993-05-25

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381194, 381201, H04R 2500

Patent

active

052147100

ABSTRACT:
The invention relates to a permanent magnet system with associated coil arrangement, the permanent magnet system consisting of two axially polarized permanent magnet rings which are mounted one behind another in the axial direction, like poles of the permanent magnet rings being opposite one another, the two permanent magnet rings being distanced from one another by a soft magnetic spacing washer, the permanent magnet rings being surrounded on the outside by a coil in such a way that the coil central axis coincides with the central axis of the permanent magnet rings, the center of the coil being located in the normal position of the coil at the level of the soft magnetic spacing washer, at least one coil being located inside the inside diameter of the permanent magnet ring in such a way that the coil central axis of the coils coincides with the central axis of the permanent magnet rings, the center of the coils being located in the normal position of the coils at the level of the soft magnetic spacing washer. There are possible uses in loudspeakers and sensors.

REFERENCES:
patent: 3665124 (1972-05-01), Sotome
patent: 4868882 (1989-09-01), Ziegenberg et al.
Ekktor Nov. 1988-pp. 14 & 16-"Der Digitale Lautsprecher ist im Kommen der Lautsprecher als D/A-Wandler".

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