Multilayered Unipoled Piezoelectric Transformers
Multilayered Unipoled Piezoelectric Transformers
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多层单极压电变压器
DOI：
10.1143/jjap.43.3503
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发表时间：
2004
影响因子：
1.5
通讯作者：
T. Ezaki
中科院分区：
文献类型：
--
作者：
S. Priya;Seyit O. Ural;Hyeoungwoo Kim;K. Uchino;T. Ezaki
本研究描述了一种多层压电电压和电力变压器，该变压器具有单向极化，工作在宽频率范围内，并通过反向电气连接提供升压和降压电压。在本设计中，输入和输出电极位于磁盘的同一侧，并通过固定间隙相互隔离。在直径29.1 mm的椎间盘上进行检查。电极图案是一个环/点结构，其中一条将点连接起来。研究了不同的输入输出面积比，发现面积比在2.8 ~ 3.3范围内或输出直径在13 ~ 15 mm范围内可获得较高的功率和效率。优化后的单层变压器功率密度为40 W/cm3，而三层结构的功率密度为25 W/cm3。随着多层结构的增加，功率增加，但由于层间的限制，有效功率密度降低。
This study describes a multi-layer piezoelectric voltage and power transformer which has one direction poling, operates in a wide-frequency range and delivers both step-up and step-down voltages by inverting the electrical connections. In this design, the input and output electrodes are on the same side of the disk and are isolated from each other by a fixed gap. Investigations were performed on a disk of diameter 29.1 mm. The electrode pattern is a ring/dot structure, where a strip connects the dots. Various ratios of input to output area were studied and it was found that area ratio in the range of 2.8–3.3 or the output diameter in range of 13–15 mm yields high power and efficiency. The power density for the optimized single layer transformer was 40 W/cm3 while that for the 3-layer structure was 25 W/cm3. Though the power increased with multilayer structure, the effective power density decreased because of the interlayer constraints.