Analysis of temperature rise for piezoelectric transformer using finite-element method

Analysis of heat problem and temperature field of a piezoelectric transformer, operated at steady-state conditions, is described. The resonance frequency of the transformer is calculated from impedance and electrical gain analysis using a finite-element method. Mechanical displacement and electric p...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2006-08, Vol.53 (8), p.1449-1457
Main Authors: JOO, Hyun-Woo, LEE, Chang-Hwan, RHO, Jong-Seok, JUNG, Hyun-Kyo
Format: Article
Language:English
Subjects:
Acoustics
Constants
Electric potential
Exact sciences and technology
Finite element method
Finite element methods
Fundamental areas of phenomenology (including applications)
Gain
General equipment and techniques
Heat transfer
Impedance
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Mathematical analysis
Physics
Piezoelectricity
Resonance
Resonant frequency
Steady-state
Temperature distribution
Temperature measurement
Transducers
Transformers
Ultrasonics, quantum acoustics, and physical effects of sound
Voltage transformers
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Summary:Analysis of heat problem and temperature field of a piezoelectric transformer, operated at steady-state conditions, is described. The resonance frequency of the transformer is calculated from impedance and electrical gain analysis using a finite-element method. Mechanical displacement and electric potential of the transformer at the calculated resonance frequency are used to calculate the loss distribution of the transformer. Temperature distribution using discretized heat transfer equation is calculated from the obtained losses of the transformer. Properties of the piezoelectric material, dependent on the temperature field, are measured to recalculate the losses, temperature distribution, and new resonance characteristics of the transformer. Iterative method is adopted to recalculate the losses and resonance frequency due to the changes of the material constants from temperature increase. Computed temperature distributions and new resonance characteristics of the transformer at steady-state temperature are verified by comparison with experimental results.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2006.1665102