径向振动压电变压器的等效电路模型及特性研究

The Equivalent Circuit Model and Characteristic of Radial Vibration Mode Piezoelectric Transformer

本文使用线性压电方程并结合相关的弹性理论对目前国际上刚刚出现的径向振动压电变压器进行了分析和研究 ,导出了该压电变压器的等效电路模型 ,并根据电路模型得出径向振动压电变压器的输入阻抗、输出阻抗、升压比、输出功率及效率等特性的数学表达式 .文中通过实验对上述特性加以验证 ,实验结果与理论计算值基本一致 。

A new kind of piezoelectric transformer,radial vibration mode piezoelectric transformer,is investigated through linear piezoelectric equations combined with the theory of elasticity,and its equivalent circuit model is deduced.According to the model,the mathematical expressions of the input impedance,output impedance,voltage gain,output power and efficiency of radial vibration mode piezoelectric transformer are concluded.These expressions are verified by the experiment results.