Energy analysis of an electromagnetic loudspeaker
DOI:
https://doi.org/10.5540/03.2021.008.01.0400Palabras clave:
Lagrangian, energy, co-energy, electromechanical, transducer.Resumen
An electromechanical system is composed by two subsystems with distinct origins: one of a mechanical nature and another of electromagnetic nature. The energies in the system have also different origins. Some of them are mechanical, as kinetic and potential, and others are electromagnetic, as magnetic and electrical. For a proper description of an electromechanical system dynamics it is not sufficient to describe each subsystem separately. Coupling terms must be considered in the system dynamics. These terms characterize the mutual influence between the two subsystems and the interplay of the energies of the system. The objective of this paper is to analyze from an energetic point of view an electromechanical system. This paper shows how the dynamics of an electromechanical system can be constructed by the definition of the energies that are present in the system and their interplay using the Lagrangian method. To exemplify, an electromagnetic loudspeaker will be analyzed. Its dynamics will be constructed and numerical integrated in order to make an energetic analysis.
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