Model based analysis of piezoelectric transformers

T. Hemsel, S. Priya, Ultrasonics 44, Supplement (2006) e741–e745.

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Journal Article | English
Piezoelectric transformers are increasingly getting popular in the electrical devices owing to several advantages such as small size, high efficiency, no electromagnetic noise and non-flammable. In addition to the conventional applications such as ballast for back light inverter in notebook computers, camera flash, and fuel ignition several new applications have emerged such as AC/DC converter, battery charger and automobile lighting. These new applications demand high power density and wide range of voltage gain. Currently, the transformer power density is limited to $40 W/cm{^3}$ obtained at low voltage gain. The purpose of this study was to investigate a transformer design that has the potential of providing higher power density and wider range of voltage gain. The new transformer design utilizes radial mode both at the input and output port and has the unidirectional polarization in the ceramics. This design was found to provide 30 W power with an efficiency of 98\% and 30 $\,^{\circ}$C temperature rise from the room temperature. An electro-mechanical equivalent circuit model was developed to describe the characteristics of the piezoelectric transformer. The model was found to successfully predict the characteristics of the transformer. Excellent matching was found between the computed and experimental results. The results of this study will allow to deterministically design unipoled piezoelectric transformers with specified performance. It is expected that in near future the unipoled transformer will gain significant importance in various electrical components.
Publishing Year
Journal Title
44, Supplement
e741 - e745

Cite this

Hemsel T, Priya S. Model based analysis of piezoelectric transformers. Ultrasonics. 2006;44, Supplement(0):e741-e745. doi:10.1016/j.ultras.2006.05.086
Hemsel, T., & Priya, S. (2006). Model based analysis of piezoelectric transformers. Ultrasonics, 44, Supplement(0), e741–e745.
@article{Hemsel_Priya_2006, title={Model based analysis of piezoelectric transformers}, volume={44, Supplement}, DOI={10.1016/j.ultras.2006.05.086}, number={0}, journal={Ultrasonics}, author={Hemsel, Tobias and Priya, S}, year={2006}, pages={e741–e745} }
Hemsel, Tobias, and S Priya. “Model Based Analysis of Piezoelectric Transformers.” Ultrasonics 44, Supplement, no. 0 (2006): e741–45.
T. Hemsel and S. Priya, “Model based analysis of piezoelectric transformers,” Ultrasonics, vol. 44, Supplement, no. 0, pp. e741–e745, 2006.
Hemsel, Tobias, and S. Priya. “Model Based Analysis of Piezoelectric Transformers.” Ultrasonics, vol. 44, Supplement, no. 0, 2006, pp. e741–45, doi:10.1016/j.ultras.2006.05.086.


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