EP 2806656 B1 20160413 - Loudspeaker heat control with state observation
Title (en)
Loudspeaker heat control with state observation
Title (de)
Lautsprecherwärmeregelung mit Statusbeobachtung
Title (fr)
Régulation thermique de haut-parleur avec observation d'état
Publication
Application
Priority
EP 13368015 A 20130521
Abstract (en)
[origin: EP2806656A1] An Active Heat Controller (10) for controlling the temperature of a loudspeaker (12) connected to it, the Active Heat Controller (10) comprising a Dynamic Range Controller (14) operatively interposed, in use, between an input driving signal terminal (16) for the loudspeaker (12) and the terminals (26) of a voice-coil of the loudspeaker (12), the Dynamic Range Controller (14) being configured to variabty attenuate the input driving signal as output at the voice-coil's terminals (20), the Active Heat Controller (10) comprising: a probe (28) operatively connected, and for applying a probe signal, to the terminals (26) of the loudspeaker's voice-coil (12) for estimating an instantaneous temperature of the voice-coil and being characterised by: a state observer (40) for estimating an instantaneous temperature of a magnet of the loudspeaker (12); and means (38) for controlling the instantaneous attenuation of the Dynamic Range Controller (14) in response to the estimated voice-coil and magnet temperatures.
IPC 8 full level
H04R 3/00 (2006.01)
CPC (source: EP)
H04R 3/007 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 13368015 A 20130521