US 8,284,982 B2 · Positionally sequenced loudspeaker system

Abstract

A variety of loudspeaker arrangements may have any of multiple adjacent magnetic circuits, single magnetic circuits, an improved loudspeaker voice coil assembly, multiple voice coil windings (124-127, 315-317), and commutated current. The radial direction of flux may alternate at adjacent poles and may have a controller that commands the current through each of the windings. The position of the moving components may be measured or inferred by the controller (213). An encoding track (318a) applied to the surface of the assembly may allow the assembly to function as part of a position transducer to permit appropriate action based on position. Calculated or sensed actual position may be used to determine the relative current in each of the windings and the controller may have compensation such as a motion control algorithm, thermal monitoring, and management of the driver. The voice coil assembly (305c) may have foil conductors applied to a substrate to connect and interconnect a single or multiple voice coil windings with minimal effect on the magnetic gap (303b) width.

Claims49

Dependent claims

A loudspeaker system comprising:

a. a loudspeaker enclosure;
b. an air movement element contained at least partially within said loudspeaker enclosure;
c. a movable transfer attached to said air movement element;
d. an electronically activated, positionally sequenced drive system to which said movable transfer is responsive;
e. a plurality of separately controllable electrical coils within said electronically activated, positionally sequenced drive system;
f. at least one magnet within said electronically activated, positionally sequenced drive system and adjacent said plurality of electrical coils;
g. a positionally sequential electronic commutation controller to which said electronically activated, positionally sequenced drive system is responsive.

4 more elements

A loudspeaker system comprising:

a. a loudspeaker enclosure;
b. an air movement element contained at least partially within said loudspeaker enclosure;
c. a movable transfer attached to said air movement element;
d. a high efficiency drive system to which said movable transfer is responsive comprising a plurality of separately controllable electrical coils;
and
e. a controller to which said high efficiency drive system is responsive,
wherein said high efficiency drive system comprises a plurality of coaxial magnets, and
wherein said plurality of separately controllable electrical coils comprise a plurality of coaxial, positionally sequenced electrical coils and wherein said controller comprises a commutation controller to which said plurality of coaxial, positionally sequenced electrical coils are responsive.

5 more elements

Dependencies are inferred from the claim text.

Positionally sequenced loudspeaker system

Life of this patent

Positionally sequenced loudspeaker system

Life of this patent

Abstract

Claims49