ELECTRIC EQUIVALENT-CIRCUIT FOR FLEXURAL VIBRATIONS IN PIEZOELECTRIC MATERIALS

被引：11

作者：

SODERKVIST, J

机构：

[1] Electronics Department, Institute of Technology, University of Uppsala, S-751 21 Uppsala

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 1990年 / 37卷 / 06期

关键词：

D O I：

10.1109/58.63116

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Piezoelectric devices are normally described using an electric equivalent circuit. General expressions for the values of the components of such a circuit are derived for flexural vibrations. These expressions are applied to some interesting electrode configurations. The obtained values are in good agreement with experimental values and values specified by manufacturers of watch crystals. It is noted that it suffices to solve Laplace’s equation for the dielectric field in order to obtain the values of the vibration amplitude, the piezoelectric current and the equivalent components. The piezoelectric part of the electric field need only be considered if very accurate values of the resonance frequencies are desired. Finally it is shown how accurate estimates can be obtained without the need of advanced calculation tools. © 1990, IEEE

引用

页码：577 / 586

页数：10

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