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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Finite element analysis on piezoelectric ring transformer
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Finite element analysis on piezoelectric ring transformer

机译：压电环形变压器的有限元分析

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摘要

The use of a piezoelectric ring as transformer is reported and studied in this paper. By using a concentric electrode pattern, a ring-shaped transformer can be designed to operate at its high order extensional modes. Lead zirconate titanate (PZT) ceramic rings with 12.7-mm outer diameter, 5.1-mm inner diameter and 1.2-mm thickness were used to fabricate the prototypes. Three-dimensional (3-D) finite element models are built to study and analyze the vibration characteristics of the piezoelectric transformers (PTs) using higher order modes (>3). The resonant frequencies, mean coupling effect, mode shapes, and other open-circuit characteristics are simulated and compared with experimental measurements. Prototypes of PTs using mode order three and four were fabricated and characterized. Good agreement can be obtained between experimental results and finite element model (FEM) simulations. The dimensions for the PTs using mode order three and four were fabricated and characterized. Good agreement can be obtained between experimental results and finite element model (FEM) simulations. The dimensions for the PTs using higher order symmetric extensional modes are optimized by FEM. To avoid mode coupling with the thickness mode, the ideal ring thickness has to less than or equal to 0.6 mm. The ring PT offers advantages of simple structure and small size. It has a good potential in making low cost PT for low-voltage applications.
机译：本文报道并研究了压电环作为变压器的应用。通过使用同心电极图案，可以将环形变压器设计为以其高阶扩展模式运行。使用外径为12.7毫米，内径为5.1毫米，厚度为1.2毫米的锆酸钛酸铅（PZT）陶瓷环制造原型。建立了三维（3-D）有限元模型，以研究和分析使用高阶模（> 3）的压电变压器（PT）的振动特性。模拟谐振频率，平均耦合效应，模式形状和其他开路特性，并将其与实验测量结果进行比较。 PT的原型使用三阶和四阶模式进行制造和表征。在实验结果和有限元模型（FEM）模拟之间可以获得良好的一致性。制作并表征了使用模式阶数3和4的PT的尺寸。在实验结果和有限元模型（FEM）模拟之间可以获得良好的一致性。使用FEM优化使用高阶对称扩展模式的PT的尺寸。为了避免模式与厚度模式耦合，理想的环厚度必须小于或等于0.6 mm。环形PT具有结构简单和尺寸小的优点。它具有为低压应用制造低成本PT的潜力。

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