Abstract

The design and optimization of piezoelectric transducer (PT) are one of the most challenging and critical stages in acoustic power transfer (APT). In this paper, the equivalent circuit of the PT is obtained by electromechanical analogy, and it is found that the system efficiency has nothing to do with the shape of the PT. However, the volume parameters (sectional area and thickness) of the PT greatly influence the efficiency of the system. We found that the efficiency of the system increases as the cross-sectional area of the PT increases. The thickness is just the opposite, and the system efficiency decreases as the thickness increases. In order to verify this law, the paper also established a system model in COMSOL and found that the results are highly consistent with the theoretical model. Optimizing the parameters of the PT can reduce the weight of the PT applied in life and broaden the application range for the use of the PT array.

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