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In this paper, the electrical equivalent circuits of the piezoelectric transformer (PT) with heat transfer system (HTS) had been studied. A heat transfer model of the longitudinal vibration PT had been built and an experiment study on the equivalent circuit model of the PT with HTS was proposed. this work provides a useful information for the application of piezoelectric transformer in high-power...
This paper developed a new type of dual output single disc piezoelectric ceramic transformer, which was made up of a disc input and two annular output terminals. The piezoelectric equation combined with elastic theory was applied to the analysis of the radial vibration of the piezoelectric disc and ring vibrator polarized in thickness direction, and the equivalent circuit of this new type of piezoelectric...
Piezoelectric transformers have been used widely in electronic circuits due to advantages such as high efficiency, miniaturization and no flammability; however the output power has been limited. For overcoming this drawback, some research has recently been focused on connections between piezoelectric transformers. Based on these operations, the output power has been improved compared to the single...
Power electronic circuits have traditionally been based on magnetic technology. The transformers and inductors in conventional converters are usually bulky compared to other elements. In an effort to miniaturize power components a piezoelectric, rather than a magnetic transformer could be employed in the power supplies. A single-branch equivalent circuit model can characterize all types of piezoelectric...
This paper presents an electromechanical model for a piezoelectric transformer (PT), which is driven at the longitudinal mode. The electromechanical model is established by the coupled equations of motion of the PT, which is derived by the Rayleigh-Ritz method and Hamilton's principle. The Rayleigh-Ritz method allows us to represent a continuous system by a discrete approximation. Thus, the variational...
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