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Ferroelectrics Volume 535, 2018 - Issue 1: Proceedings of the 14th International Meeting on Ferroelectricity, Part III
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Section F: Applications and Devices

Fabrication and operational characteristics of step-down piezoelectric transformer based on PMN-PT ceramics

A. L. MagalhãesFederal Institute of Education, Science and Technology of Ceará, PPGET, Ceará, Fortaleza-CE, Brazil;
,
A. F. OliveiraFederal Institute of Education, Science and Technology of Ceará, PPGET, Ceará, Fortaleza-CE, Brazil;
,
A. J. M. SalesDepartment of Physics, Telecommunications and Materials Science and Engineering Laboratory (LOCEM), Federal University of Ceará, Caixa, Fortaleza-CE, Brazil; ;Department of Physics, University of Aveiro, Aveiro, Portugal
,
F. J. A. AquinoFederal Institute of Education, Science and Technology of Ceará, PPGET, Ceará, Fortaleza-CE, Brazil;
,
D. X. GouveiaFederal Institute of Education, Science and Technology of Ceará, PPGET, Ceará, Fortaleza-CE, Brazil;
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J. W. M. MenezesFederal Institute of Education, Science and Technology of Ceará, PPGET, Ceará, Fortaleza-CE, Brazil;
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E. B. AraújoDepartment of Physics and Chemistry, São Paulo State University, Ilha Solteira, SP, Brazil; Correspondence[email protected]
&
A. S. B. SombraDepartment of Physics, Telecommunications and Materials Science and Engineering Laboratory (LOCEM), Federal University of Ceará, Caixa, Fortaleza-CE, Brazil;
show all
Pages 18-24 | Received 05 Sep 2017, Accepted 20 Feb 2018, Published online: 11 Mar 2019
 
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Abstract

A ring-type step-down piezoelectric transformer based on 0.65Pb(Mg1/2Nb2/3)O3-0.35PbTiO3 ceramic was manufactured to study its main operational characteristics through experimental measurements and numerical simulations based on the corresponding electrical equivalent circuit. The measured resonance frequency of 93.4 kHz was observed for the first vibration mode and the measured voltage gain and maximum efficiency were 0.1 and 49.3%, respectively, for the load resistance of 500 Ω. The simulated voltage gain and maximum efficiency were 44.3% and 0.1 at 733 Ω. The possible origin of the low efficiency in the studied piezoelectric transformer is discussed.

Acknowledgments and funding

The authors would like to thank the Eletrosul Centrais Elétricas S.A, the US Air Force Office of Scientific Research (AFOSR) (FA9550-16-1-0127) for providing experimental facilities and financial support for this work, and thanks to Prof. V. Dmitriev (UFPA) for allowing the use of COMSOL software. Our gratitude to the Brazilian agencies CNPq (Grant 304604/2015-1), CAPES and FAPESP for financial support.

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