Research on an Annular Piezoelectric Ceramic Composite Transformer in Radial Vibration

XU Jie; LIN Shuyu

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Research on an Annular Piezoelectric Ceramic Composite Transformer in Radial Vibration

XU Jie,LIN Shuyu * #

Shaanxi Key Laboratory of Ultrasonics, Institute of Applied Acoustics, Shaanxi Normal University, Xian, 710062

*Correspondence author

#Submitted by

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Funding: National Natural Science Foundation of China （No.11174192, 11374200, 11474192）, Research Fund for the Doctoral Program of Higher Education of China （No.2011020211010）

Opened online: 3 December 2015

Accepted by: none

Citation: XU Jie,LIN Shuyu.Research on an Annular Piezoelectric Ceramic Composite Transformer in Radial Vibration[OL]. [ 3 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4665251

A new structure of annular piezoelectric ceramic composite transformer in radial vibration is proposed and its characteristics are researched. The new piezoelectric transformer consists of two concentric piezoelectric ceramic rings and a metal ring in the radial direction. By deducing the electro-mechanical equivalent circuit of the piezoelectric composite transformer, the equations of resonance/ anti-resonance frequency, voltage gain and efficiency are obtained. The dependences of the electromechanical characteristics (resonance frequency, effective electro-mechanical coupling coefficient, voltage gain and efficiency) on geometrical dimension of the metal ring, the mechanical loss and load impedance are analyzed. To verify the analytical theory, the frequency and voltage gain of piezoelectric transformers are measured. It is shown that the experimental results are in good agreement with the analytical results.

Keywords:Piezoelectric ceramic composite transformer; resonance frequency; voltage gain; efficiency; mechanical loss; load impedance

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