Abstract—A multilayer laminated piezoelectric Pb(Zr1−
xTix)O3 (PZT) ceramic transformer, operating in a halfwavelength
longitudinal resonant mode (λ/2 mode), has been
analyzed. This piezoelectric transformer is composed of one
thickness-polarized section (T-section) for exciting the longitudinal
mechanical vibrations, two longitudinally polarized
sections (L-section) for generating high-voltage output, and
two insulating layers laminated between the T-section and
L-section layers to provide insulation between the input and
output sections. Based on the piezoelectric constitutive and
motion equations, an electro-elasto-electric (EEE) equivalent
circuit has been developed, and correspondingly, an effective
EEE coupling coefficient was proposed for optimum design of
this multilayer transformer. Commercial finite element analysis
software is used to determine the validity of the developed
equivalent circuit. Finally, a prototype sample was manufactured
and experimental data was collected to verify the model’s
validity
Abstract—A multilayer laminated piezoelectric Pb(Zr1−
xTix)O3 (PZT) ceramic transformer, operating in a halfwavelength
longitudinal resonant mode (λ/2 mode), has been
analyzed. This piezoelectric transformer is composed of one
thickness-polarized section (T-section) for exciting the longitudinal
mechanical vibrations, two longitudinally polarized
sections (L-section) for generating high-voltage output, and
two insulating layers laminated between the T-section and
L-section layers to provide insulation between the input and
output sections. Based on the piezoelectric constitutive and
motion equations, an electro-elasto-electric (EEE) equivalent
circuit has been developed, and correspondingly, an effective
EEE coupling coefficient was proposed for optimum design of
this multilayer transformer. Commercial finite element analysis
software is used to determine the validity of the developed
equivalent circuit. Finally, a prototype sample was manufactured
and experimental data was collected to verify the model’s
validity
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