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Design of closed loop audio power amplifiers by means of an accurate model of vented box loudspeakers
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| Author(s) |
GONZALEZ-ESPIN Fran; GARCERA Gabriel; FIGUERES Emilio; SANDIA Jesus |
| Abstract |
The purpose of this paper is to analyze the stability of closed loop switching power amplifiers using an accurate model of a loudspeaker installed in a commonly used bass reflex enclosure instead of the purely resistive model that can be used with a Zobel network. The model takes into account the electrical-mechanical-acoustical parameters of the transducer as well as the voice-coil loudspeaker's non-linear behavior, avoiding stability problems when trying to compensate for the output filter stage, thus obtaining better THD figures. This model has been experimentally tested and then used to design a regulator for Voltage-Mode Control method by means of MATLAB software. The regulator has been simulated using a full-bridge power converter along with the proposed model of the transducer. |
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| Filename: | 0831-epe2007-full-19123965.pdf |
| Filesize: | 500.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2008-01-11 by System |
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