System for loudspeaker real time state variable prediction with limiting and linear compensation
AssigneeHarman International Industries, Incorporated
InventorsRussell H. LAMBERT, Douglas J. BUTTON
Life of this patent
Estimating the term…
Abstract
A thermal model system for estimating a voice coil temperature of a loudspeaker that has frequency dependent parameters to model thermal behavior of the loudspeaker may include a loudspeaker having a voice coil and a magnet, and a thermal model configured to have multiple frequency dependent thermal circuits including the voice coil and the magnet that determine a voice coil temperature which is used to limit input to the loudspeaker to prevent thermal overload of the loudspeaker.
Claims16
A thermal model system for estimating a voice coil temperature of a loudspeaker that has frequency dependent parameters to model thermal behavior of the loudspeaker, comprising:
- a loudspeaker having a voice coil and a magnet;
- and
- a thermal model configured to have multiple frequency dependent thermal circuits including the voice coil and the magnet that determine a voice coil temperature which is used to limit input to the loudspeaker to prevent thermal overload of the loudspeaker, wherein the thermal model is further configured to:
- determine an impedance of the voice coil based on the voice coil temperature;
- determine frequency dependent parameters and frequency independent parameters based on at least the impedance;
- and
- apply the frequency dependent thermal parameters for application during heating of the voice coil.
(canceled)
(canceled)
A system for determining frequency dependent parameters and frequency independent parameters to model thermal behavior of a loudspeaker, comprising:
- a loudspeaker having a voice coil and a magnet;
- and
- a thermal model configured to limit an input to the loudspeaker to prevent thermal overload of the loudspeaker, the limit being based on a voice coil temperature and an impedance of a voice coil, determine frequency dependent parameters and frequency independent parameters based on at least the impedance, and apply the frequency independent parameters for application during cooling of the voice coil.
(canceled)
(canceled)
A method for estimating a voice coil temperature of a loudspeaker that has frequency dependent parameters that model thermal behavior of the loudspeaker, comprising:
- a thermal model having multiple frequency dependent thermal circuits including a voice coil and a magnet;
- limiting an input to the loudspeaker based on the voice coil temperature to prevent thermal overload of the loudspeaker;
- and
- generating frequency dependent parameters for application during heating of the voice coil.
(canceled)
Dependencies are inferred from the claim text.