Přehled o publikaci
2015
Experimental Verification of an Analytical Model for the Ring-shaped Piezoelectric Transformer
PŮLPÁN, Petr and Jiří ERHARTBasic information
Original name
Experimental Verification of an Analytical Model for the Ring-shaped Piezoelectric Transformer
Authors
PŮLPÁN, Petr (203 Czech Republic, guarantor) and Jiří ERHART (203 Czech Republic, belonging to the institution)
Edition
Journal of Electrical and Electronics Engineering, 2015, 1844-6035
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
Solid-state physics and magnetism
Country of publisher
Romania
Confidentiality degree
is not subject to a state or trade secret
References:
RIV identification code
RIV/46747885:24510/15:#0001211
Organization
Faculty of Science, Humanities and Education – Technical University of Liberec – Repository
Keywords in English
piezoelectric transformer; piezoelectric ceramics; resonator
Links
GAP102/10/1139, research and development project.
Changed: 5/4/2016 09:44, Jiří Erhart
Abstract
In the original language
Piezoelectric transformers prepared using bulk PZT ceramic rings poled homogeneously along thickness were studied experimentally on the commercially available rings (PZT type APC841, d =20 mm, D = 50 mm and thickness 6 mm, aspect ratio d/D = 0.40) as well as analytically. Input and output parts were formed by the concentric ring electrodes. The fundamental and the first overtone were measured for the transformation ratio and efficiency. Ring transformer geometry shows the high transformation ratios (up to 108 under no-load condition for the first overtone) and efficiencies 91-99% for the properly designed electrode diameter. The optimum resistive load was relatively small within the range of 0.1 – 5kOhm. The optimum aspect ratio of electrode was found as d1/D = 0.70. The fundamental resonance frequency was found insensitive to the electrode diameter contrary to the first overtone. Analytical calculations are also used for the comparison of the mechanically free and clamped transformer. Mechanically clamped transformer generally shows higher resonance frequency.