Priya Shashank, Kim Hyeoungwoo, Ural Seyit, Uchino Kenji
Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX 76019, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2006 Apr;53(4):810-6.
This study describes a multilayer piezoelectric voltage and power transformer that 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 isolation gap. The electrode pattern is a ring/dot structure such that it uses radial mode for both input and output part that are built-in on the same ceramic disk. A prototype transformer was fabricated of size 15 x 2.78 mm2 having mass of 3.8 gm. In the step-down configuration at the constant output power of 6 W, the transformer characteristics across a 100 ohms load were found to be efficiency = 92%, gain = 0.21 input voltage = 110 Vrms, and temperature rise = 20 degrees C from the room temperature. In the step-up configuration at the constant output power of 5 W, the transformer characteristics across a 5 kohms load were found to be efficiency = 97%, gain = 9.5, input voltage = 16 Vrms, and temperature rise = 8 degrees C from the room temperature. A detailed equivalent circuit analysis of the transformer was done, and the results were found to be in excellent agreement with the experimental results.
本研究描述了一种多层压电电压和功率变压器，其具有单向极化，在宽频率范围内运行，并通过反转电气连接来提供升压和降压电压。在该设计中，输入和输出电极位于圆盘的同一侧，并通过固定的隔离间隙彼此隔离。电极图案为环形/点状结构，使得其在同一陶瓷圆盘上内置的输入和输出部分均采用径向模式。制作了一个尺寸为15×2.78 mm2、质量为3.8克的变压器原型。在降压配置下，在6 W的恒定输出功率下，发现该变压器在100欧姆负载下的特性为：效率 = 92%，增益 = 0.21，输入电压 = 110 Vrms，室温下温度上升 = 20摄氏度。在升压配置下，在5 W的恒定输出功率下，发现该变压器在5 kohms负载下的特性为：效率 = 97%，增益 = 9.5，输入电压 = 16 Vrms，室温下温度上升 = 8摄氏度。对该变压器进行了详细的等效电路分析，结果发现与实验结果非常吻合。
