2013
Disc Piezoelectric Ceramic Transformers
ERHART, Jiří; Petr PŮLPÁN; Vít LÉDL; Roman DOLEČEK; Pavel PSOTA et. al.Basic information
Original name
Disc Piezoelectric Ceramic Transformers
Authors
ERHART, Jiří (203 Czech Republic, belonging to the institution); Petr PŮLPÁN (203 Czech Republic, belonging to the institution); Vít LÉDL (203 Czech Republic, belonging to the institution); Roman DOLEČEK (203 Czech Republic, belonging to the institution) and Pavel PSOTA (203 Czech Republic, belonging to the institution)
Edition
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2013, 0885-3010
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
Electronics and optoelectronics
Country of publisher
United States of America
Confidentiality degree
is not subject to a state or trade secret
References:
RIV identification code
RIV/46747885:24510/13:#0000989
Organization
Faculty of Science, Humanities and Education – Technical University of Liberec – Repository
UT WoS
000322826700010
Keywords in English
piezoelectric transformer
Links
GAP102/10/1139, research and development project.
Changed: 10/3/2015 13:50, RNDr. Daniel Jakubík
Abstract
In the original language
In this contribution, we present our study on disc-shaped and homogeneously poled piezoelectric ceramic transformers working in planar-extensional vibration modes. Transformers are designed with electrodes divided into wedge, axisymmetrical ring-dot, moonie, smile, or yin-yang segments. Transformation ratio, efficiency, and input and output impedances were measured for low-power signals. Transformer efficiency and transformation ratio were measured as a function of frequency and impedance load in the secondary circuit. Optimum impedance for the maximum efficiency has been found. Maximum efficiency and no-load transformation ratio can reach almost 100% and 52 for the fundamental resonance of ring-dot transformers and 98% and 67 for the second resonance of 2-segment wedge transformers. Maximum efficiency was reached at optimum impedance, which is in the range from 500 Ω to 10 kΩ, depending on the electrode pattern and size. Fundamental vibration mode and its overtones were further studied using frequency-modulated digital holographic interferometry and by the finite element method. Complementary information has been obtained by the infrared camera visualization of surface temperature profiles at higher driving power.