Bar Piezoelectric Ceramic Transformers Working in Longitudinal
Mode

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Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode

Přehled o publikaci

J 2015

Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode

SEBASTIAN, Tutu and Jiří ERHART

Basic information

Original name

Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode

Authors

SEBASTIAN, Tutu (356 India) and Jiří ERHART (203 Czech Republic, guarantor, belonging to the institution)

Edition

Ferroelectrics, London, Taylor & Francis, 2015, 0015-0193

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

Solid-state physics and magnetism

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

is not subject to a state or trade secret

References:

Text clanku u nakladatele

RIV identification code

RIV/46747885:24510/15:#0001263

Organization

Faculty of Science, Humanities and Education – Technical University of Liberec – Repository

DOI

https://doi.org/10.1080/00150193.2015.1099413

UT WoS

000370152000003

Keywords in English

Piezoelectric transformer; PZT ceramics; resonator; transformation ratio

Changed: 15/4/2016 12:19, Jiří Erhart

Abstract

In the original language

The bulk transformer working in k33-mode in both input and output circuits was studied. Theoretical model was developed to describe the transformation ratio as a function of the electrode size, material properties, frequency and impedance load in output circuit. Numerical simulation allows for the optimization of the primary electrode aspect ratio (l1/l=0.34) for the best transformation ratio at no-load condition. Transformation ratio, efficiency, input and output impedances are measured for the set of samples with variable input/output electrode size for the lowpower signal and compared with derived formulae. The maximum efficiency of 52% and transformation ratio of U2/U1=0.59 at the optimum load of 20 kOhm is obtained for the input part volume ratio l1/l=0.40 for the fundamental resonance. The higher efficiency of 60% and the transformation ratio of 0.36 at the optimum load of 10 kOhm is observed at the first overtone for l1/l=0.69 input part volume ratio. The proposed piezoelectric transformer is therefore suitable for step-down transformer applications with low output power density (0.09W/cm3) and relatively low efficiency (50%).

Cite

SEBASTIAN, Tutu and Jiří ERHART. Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode. Ferroelectrics. London: Taylor & Francis, 2015, vol. 486, No 1, p. 13-24. ISSN 0015-0193. Available from: https://doi.org/10.1080/00150193.2015.1099413.

@article{20600,
   author = {Sebastian, Tutu and Erhart, Jiří},
   article_location = {London},
   article_number = {1},
   doi = {https://doi.org/10.1080/00150193.2015.1099413},
   keywords = {Piezoelectric transformer; PZT ceramics; resonator; transformation ratio},
   language = {eng},
   issn = {0015-0193},
   journal = {Ferroelectrics},
   title = {Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode},
   url = {http://www.tandfonline.com/doi/abs/10.1080/00150193.2015.1099413?journalCode=gfer20},
   volume = {486},
   year = {2015}
}

TY  - JOUR
ID  - 20600
AU  - Sebastian, Tutu - Erhart, Jiří
PY  - 2015
TI  - Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode
JF  - Ferroelectrics
VL  - 486
IS  - 1
SP  - 13-24
EP  - 13-24
PB  - Taylor & Francis
SN  - 0015-0193
KW  - Piezoelectric transformer
KW  - PZT ceramics
KW  - resonator
KW  - transformation ratio
UR  - http://www.tandfonline.com/doi/abs/10.1080/00150193.2015.1099413?journalCode=gfer20
L2  - http://www.tandfonline.com/doi/abs/10.1080/00150193.2015.1099413?journalCode=gfer20
N2  - The bulk transformer working in k33-mode in both input and output circuits was studied. Theoretical model was developed to describe the transformation ratio as a function of the electrode size, material properties, frequency and impedance load in output circuit. Numerical simulation allows for the optimization of the primary electrode aspect ratio (l1/l=0.34) for the best transformation ratio at no-load condition. Transformation ratio, efficiency, input and output impedances are measured for the set of samples with variable input/output electrode size for the lowpower signal and compared with derived formulae. The maximum efficiency of 52% and transformation ratio of U2/U1=0.59 at the optimum load of 20 kOhm is obtained for the input part volume ratio l1/l=0.40 for the fundamental resonance. The higher efficiency of 60% and the transformation ratio of 0.36 at the optimum load of 10 kOhm is observed at the first overtone for l1/l=0.69 input part volume ratio. The proposed piezoelectric transformer is therefore suitable for step-down transformer applications with low output power density (0.09W/cm3) and relatively low efficiency (50%).
ER  -

SEBASTIAN, Tutu and Jiří ERHART. Bar Piezoelectric Ceramic Transformers Working in Longitudinal Mode. \textit{Ferroelectrics}. London: Taylor \&{} Francis, 2015, vol.~486, No~1, p.~13-24. ISSN~0015-0193. Available from: https://doi.org/10.1080/00150193.2015.1099413.