Effect of Equivalent Constant and Output Power of Concentric Disk-Type Piezoelectric Transformer on Temperature
Date Issued
2010
Date
2010
Author(s)
Chou, I-Mu
Abstract
This dissertation aims to discuss the energy losses in the piezoelectric transformer. The resistance of the equivalent circuit has been used to explore how the energy losses varies from the temperature. Losses in the piezoelectric transformer has been considered generally as two different mechanisms: dielectric and mechanical loss which we succeeded in measuring by oscilloscope. Meanwhile statistical data is adopted to compare with the experimental results by impedance Analyer.
Due to the PSIM simulation software, we could simulate and verify the measure method of which the result was accurate at measuring the dielectric and mechanical loss.
In addition, we found the temperature and input voltage were two major parameters to influence the energy losses in the piezoelectric transformer. When the temperature and input voltage increased, the energy losses raised accordingly. However, when we input low voltage, temperature became the major parameter to the energy losses in piezoelectric transformer. On the contrary, when we input high voltage, input voltage became the major parameter.
Finally, we added the dielectric and mechanical loss to the piezoelectric transformer in order to analyze the piezoelectric transformer output power. In conclusion, the experimental results show that the energy losses control loop in the piezoelectric transformer. And result shows when the temperature increased, the output power decreased as well.
Subjects
concentric disk-type
piezoelectric transformer
temperature
equivalent constant
dielectric loss
energy loss
output power
Type
thesis
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