| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Influence of the Nonlinearity of Loudspeakers on the Performance of Thermoacoustic Refrigerators Driven by Current and Voltage |
FAN Li, ZHANG Shu-Yi, ZHANG Hui |
| Key Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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FAN Li, ZHANG Shu-Yi, ZHANG Hui 2010 Chin. Phys. Lett. 27 074301 |
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Abstract The influence of the nonlinearity of electrodynamic loudspeakers on the performance of thermoacoustic refrigerators with the loudspeakers as acoustic sources is studied by nonlinear equivalent circuit models of electrodynamic loudspeakers driven by current and voltage. The simulated results demonstrate that there are different nonlinear effects between current-drive and voltage-drive refrigerators, and the differences are mainly induced by the motional electromotive force caused by the coil moving in the magnetic field. With voltage driving, the influence of the nonlinearity of the loudspeaker on the diaphragm displacement and acoustic output power is much smaller than that with current driving. Therefore, considering the nonlinearity of the loudspeakers, a proper driving method must be chosen according to the practical applications although little difference is found with the linear models.
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| Keywords:
43.38.+n
43.25.+y
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Received: 14 December 2009
Published: 28 June 2010
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| PACS: |
43.38.+n
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(Transduction; acoustical devices for the generation and reproduction of sound)
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43.25.+y
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(Nonlinear acoustics)
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